Practice the CHEMISTRY Past Questions with Answers. The questions are answered by our experts and you will get the correct answers to the CHEMISTRY questions.
Prepare yourself for the exam ahead and test your knowledge and readiness.
0% SSCE/NECO/GCE (CHEMISTRY PAST QUESTIONS) CHEMISTRY PAST QUESTIONS APP Questions will be picked at random from the question bank.You can use the NEXT button to move to the next question, use the PREV button to move to the previous question, the CLEAR button to clear any answer of your choice and you have the FINISH button to end the exam if you choose to.Any question not answered before the end of the exam time, will be marked as wrong and the exam will end by itself. so try to attempt all questions on time.Goodluck! 1 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following non-metals reacts most readily with metals? Nitrogen Chlorine Sulphur Carbon 2 / 80 Category: CHEMISTRY PAST QUESTIONS Dehydration of ethanol produces ethanoic acid ethene ethanal propan-1,2,3-triol 3 / 80 Category: CHEMISTRY PAST QUESTIONS What is the function of sulphur (IV) oxide in the reaction represented by the following equation? SO 2(aq) + 2H2S(g) → 3S (s) + 2H 2O (l) Bleaching agent Oxidising agent Dehydrating agent Acid 4 / 80 Category: CHEMISTRY PAST QUESTIONS Consider the reaction represented by the following equation: H2(g) + 12(g) → 2HI(g). The number of effective collisions of molecules of the reactants decreases as a catalysty is intoduced into the system the pressure increased the volume of the system is increased the temperature is raised 5 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following movements can be described as random motion? planets going round the sun car travelling on a straight line wheelbarrow being pushed gas molecules colliding in a flask 6 / 80 Category: CHEMISTRY PAST QUESTIONS A mixture of calcium chloride and calcium trioxocarbonate (IV) in water can be separated by distillation sublimation evaporation filtration 7 / 80 Category: CHEMISTRY PAST QUESTIONS Pauli Exclusion Principle is related to reversiblility of equlibrium reactions collision theory of reaction rates electronegativity values of elements quantum numbers of electrons 8 / 80 Category: CHEMISTRY PAST QUESTIONS Metals are said to be malleable because they can be beaten into sheets can be alloyed are good conductors of electricity are good conductors heat 9 / 80 Category: CHEMISTRY PAST QUESTIONS Rusting of iron is an example of displacement reaction decomposition redox reaction deliquescence 10 / 80 Category: CHEMISTRY PAST QUESTIONS Exhaust fumes discharged from a smoky vehicle gradually become invisible as a result of diffusion absorption emission combustion 11 / 80 Category: CHEMISTRY PAST QUESTIONS 0.10 mol dm-3 NaCI conducts electricity better than 0.10 mol dm-3 CH3COOH because the solution of NaCI has a higher pH contains more ions is neutral to litmus has a lower molar mass 12 / 80 Category: CHEMISTRY PAST QUESTIONS Chemical equilibrium is attained when concentrations of the products are greater than those of the reactants reactants in the system are used up concentrations of the reactants and products remain constant reactants stop forming the products 13 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following pairs of reagents recat to produce hydrogen? Magnesium and dilute tetraoxosulphate (VI) acid Zinc and concentrated trioxonitrate (V) acid Copper and dilute hydrochloric acid Water and calcium dicarbide 14 / 80 Category: CHEMISTRY PAST QUESTIONS Two radioactive elements Q and S have half-life periods of 10 hours and 20 hours respectively. Therefore S is more stable than Q Q is twice as stable as S Q emits fewer particles than S S decays faster than Q 15 / 80 Category: CHEMISTRY PAST QUESTIONS The property of calcium chloride which makes it useful as a drying agent is that it is deliquescent ionic a strong electrolyte a normal salt 16 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following statements about ideal gases is/are correct?I. The cohesive forces between their particles are negligiblell. The have no definite volume but occupy the volume of their containersIII. They are not compressibleIV. Their particles collide with loss of energy l and ll only l, ll and lll only l, ll, lll, and IV l only 17 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following substances decomposes when an electric current is passed through it? Glucose solution Zinc rod Hydrochloric acid Tetrachlormethane 18 / 80 Category: CHEMISTRY PAST QUESTIONS A sheet of paper is placed in the path of a beam from a radioactive source. The emissions that pass through the paper consist of beta particles and gamma rays alpha particles only alpha and beta particles alpha particles and gamma rays 19 / 80 Category: CHEMISTRY PAST QUESTIONS What is the value of x in the following equation? Cr2O72- + 14H+ + xe- → 2Cr3+ + 7H2O 12 6 1 8 20 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following will displace copper from a solution of copper (ll) salt? Magnesium Zinc ions Silver Aluminium ions 21 / 80 Category: CHEMISTRY PAST QUESTIONS Chlorine atom forms CI by Donating lone pair of electrons Losing one electron Gaining one electron Sharing one electron 22 / 80 Category: CHEMISTRY PAST QUESTIONS What will be the effect of increase in pressure on the following system at equilibrium? 2NH2(g) N2(g) + 3H2(g) Activation energy will decrease the forward reaction will be favoured the reaction will go to completion the concentration of ammonia will increase 23 / 80 Category: CHEMISTRY PAST QUESTIONS What is the effect of using vanadium (V) oxide as catalyst in the reaction represented by the following equation? 2SO2 + O2 ⇌ 2SO3; ∆H = - xKJmol-1 Increases the collision rate of reactant particles Decreases the value of ∆H Reduces the time for attainment of equilibrium Shifts equilibrium position to the right 24 / 80 Category: CHEMISTRY PAST QUESTIONS Consider the following equation: Ag+ (aq) + CI-(aq) → Ag+CI- (s) ; ∆H = _65.7 kJmol-1. From the equation, it can be deduced that direct combination is involved and the reaction is endothermic the reaction is endothermic and occurs at high temperature a solid is formed and heat is evolved activation energy is high and a catalyst is required 25 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the orbitals 4s, 4p, 4d and 4f has the lowest energy? 4p 4d 4f 4s 26 / 80 Category: CHEMISTRY PAST QUESTIONS The type of chemical bond that exists between potassium and oxygen in potassium oxide is metallic covalent ionic dative 27 / 80 Category: CHEMISTRY PAST QUESTIONS An exothermic reaction is one which involves evolution of gas as it proceeds positive change in value of enthalpy attainment of dynamic equilibrium loss of heat to the surrounding 28 / 80 Category: CHEMISTRY PAST QUESTIONS When alkanols react with sodium, the ga evolved is oxygen hydrogen ethyne methane 29 / 80 Category: CHEMISTRY PAST QUESTIONS Helium is preferred to hydrogen in filling balloons because hydrogen is diatomic is inflammable exhibits isotopy is a component of water 30 / 80 Category: CHEMISTRY PAST QUESTIONS If an element with high electron affinity combines with another element with low ionization energy the bond formed will be mainly ionic metallic covalent dative 31 / 80 Category: CHEMISTRY PAST QUESTIONS Elactrostatic force of attraction between sodium ion and halide ion is greatest in NaF NaCI NaBr NaI 32 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following is not correct about oxidation number convention? The oxidation number of a/an element in the free state is zero monatomic ion is equal to its charge atom of a diatomic molecules is + 2 alkali meta like sodium in its compounds is + 1 33 / 80 Category: CHEMISTRY PAST QUESTIONS Petrol consists mainly of hydrocarbons alktanols polymers alkanoates 34 / 80 Category: CHEMISTRY PAST QUESTIONS A reaction is represented by the equation below. A2(g) + B2(g) 2AB(g); ∆H = +X kJmol-1 Which of the following statements about the system is correct? Pressure has no effect on the equilibrium mixture The reaction goes to completion at equilibrium The forward reaction is exthermic At equilibrium increase in temperature favours the reverse reaction 35 / 80 Category: CHEMISTRY PAST QUESTIONS Equal volumes of CO2 cnd CO at s.t.p have the same number of molecules rate of diffusion mass density 36 / 80 Category: CHEMISTRY PAST QUESTIONS A concentrated solution containing H+, Cu2+,OH- and CI- was electrolysed using platiunm electrodes which of the ions will be discharged at the cathods? CI- OH- Cu2+ H+ 37 / 80 Category: CHEMISTRY PAST QUESTIONS Substances which absorb water from the atmosphere without dissolving in it are said to be hydrated anhydrous hygroscopic insolube 38 / 80 Category: CHEMISTRY PAST QUESTIONS What type of reaction is involved when wood shavings produce a brown gas with concentrated HNO3? Destructive distillation Dehydration Nutralization Redox reaction 39 / 80 Category: CHEMISTRY PAST QUESTIONS The spontaneity of a chemical reaction is determined by the change in the free energy of the system concentration of the reactants temperature of the system pressure applied to the system 40 / 80 Category: CHEMISTRY PAST QUESTIONS One mole of a compound M(HCO3)2 has a mass of 162g. Calculate the relative atomic mass of M. [H = 1, C =12, O = 16] 53 122 101 40 41 / 80 Category: CHEMISTRY PAST QUESTIONS Electrovalent compounds are characterized by strong oxidizing ability solubility in ethanol high melting point high molar mass 42 / 80 Category: CHEMISTRY PAST QUESTIONS A finely divided from of a metal burns more readily in air than the rod from because the rod has different chemical properties higher molar mass protective oxide coating smaller surface area 43 / 80 Category: CHEMISTRY PAST QUESTIONS 30cm3 pf hydrogen at s.t.p combine with 20cm3 of oxygen to form steam according to the following equation 2H2(g) + O2(g) → 2H2O(g). Calculate the total volume of the gaseous mixture at the end of the reaction 25cm cube 50cm cube 30cm cube 35cm cube 44 / 80 Category: CHEMISTRY PAST QUESTIONS If the solubility of KHCO3 is 0.40 mole dm-3 40.0g 100.0g 10.0g 4.0g 45 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following can undergo both addition reactions and substitution reactions? Benzene Propene Pentane Hexane 46 / 80 Category: CHEMISTRY PAST QUESTIONS What mass of copper would be deposited by a current of 1. 0 ampere passing for 965 seconds through copper (ll) tetraoxosulphate (IV) solution? [Cu = 63.5; 1F = 96500C] 0.318g 0.635g 6.35g 18g 47 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following lowers the activation energy of a chemical reaction? Reducing agent Freezing mixture Catalyst Water 48 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following increases as boiling water changes to steam? temperature of the system number of molecules activation energy degree of disorder in the system 49 / 80 Category: CHEMISTRY PAST QUESTIONS Gas molecules are said to be perfectly elastic because the volume occupied by them is negligible they move about in straight lines the distances between them are negligible they collide without loss of energy 50 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following procedures is suitable for identifying the food colouring added to a pastry sample? The anode increases in mass Both electrodes gain electrons The blue colour of the solution fades gradually The cathode becomes coated with copper 51 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following contains co-ordinate covalent bond? NH4 Na+CI CH4 HCI 52 / 80 Category: CHEMISTRY PAST QUESTIONS It can be concluded that gastric juice is acidic contains enzymes is a mixture has pH value of 7 53 / 80 Category: CHEMISTRY PAST QUESTIONS Given that the order of reactivity of four metals is P>Q>R>S, which of the following reactions is feasible? Q + S+ → S + Q+ S + P+ → P + S + S + Q+ → Q + S+ R + P+ → P + R+ 54 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following properties increases down a group in the Periodic Table? Atomic radius Electronegativity Ionization energy Electon affinity 55 / 80 Category: CHEMISTRY PAST QUESTIONS What is oxidized in the reaction represented by the following equation? 3CU + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O Hydrogen Nitrogen Oxygen Copper 56 / 80 Category: CHEMISTRY PAST QUESTIONS A radioactive solid is best stored in a cool, dark cupboard under ultraviolet light in a box lined with lead under paraffin oil 57 / 80 Category: CHEMISTRY PAST QUESTIONS The crystal layers in graphite are held together by covalent bonds van der Waals' forces hydrogen bonds electrostatic forces 58 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following compounds dissolves in water to give an alkaline solution? Sulphur (IV) oxide Sodium chloride Ammonium chloride Potassium oxide 59 / 80 Category: CHEMISTRY PAST QUESTIONS The presence of unpaired electrons in an atom of a transition metal gives rise to paramagnetism shiny appearance ductility nalleability 60 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following features of a human skeleton can be determined by carbon-dating? Race Height Mass Age 61 / 80 Category: CHEMISTRY PAST QUESTIONS Aluminium is extracted from cassiterite bauxite cryolite magnetite 62 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following will produce oxygen and hydrogen during its electrolysis using platinum electrode? Dilute sodium chloride solution Glucose solution Aqueous copper (ll) tetraoxosulphate (IV) Concentrated hydrochloric acid 63 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following methods is suitable for the preparation of an insoluble salt? Action of an acid on a trioxocarbonate (IV) Action of an acid on a metal Double decomposition Neutralisation 64 / 80 Category: CHEMISTRY PAST QUESTIONS P Total = F1 + P2 + P 3 + .........Pn' where P Total is the pressure of a mixture of gasses. The equation above is an expression of Graham's law Boyle's law Gay-Lussac's Law Dalton's law 65 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following compounds dissolves in water to form a solution with pH below 7? Ammonium chloride Potassium hydroxide Sodium trioxocarbonate (IV) Sodium tetraoxosulphate (VI) 66 / 80 Category: CHEMISTRY PAST QUESTIONS What does ∆H represent in the following equation ? Cl(g) + e- → CI- (g); ∆H = - 363 kJ mol-1 lonization energy Heat of atomization Electron affinity Dissociation energy 67 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following occurs when a solution of CuSO4 is electrolysed using copper electrodes? The blue colour of the solution fades gradually Both electrodes gain electrons The cathode becomes coated with copper The anode increases in mass 68 / 80 Category: CHEMISTRY PAST QUESTIONS The atoms of four elements are represented as 20Q, 16R, 10S and 8T Which of the elements would be unreactive? S Q T R 69 / 80 Category: CHEMISTRY PAST QUESTIONS What is the oxidation number of nitrogen in AI(NO3)3? + 1 + 5 + 3 + 6 70 / 80 Category: CHEMISTRY PAST QUESTIONS The gas evolved when dilute tetraoxosulphate (VI) acid reacts with sodium hydrogen trioxocarbonate (IV) is oxygen sulphur (VI) oxide hydrogen carbon (IV) oxide 71 / 80 Category: CHEMISTRY PAST QUESTIONS Elements which belong to the same group in the Periodic Table are characterized by presence of the same number of outermost electrons in the respective atoms difference of +1 in the oxidation numbers of successive members presence of the same number of electron shells in the respective atoms difference of 14 atomic mass units between successive members 72 / 80 Category: CHEMISTRY PAST QUESTIONS The liquid product of the destructive distillation of coal is paraffin oil kerosene ammoniacal liquor ethanol 73 / 80 Category: CHEMISTRY PAST QUESTIONS Calcium atom ionizes by sharing two electrons gaining two protons losing two electrons gaining two electrons 74 / 80 Category: CHEMISTRY PAST QUESTIONS Which of the following would dissolve in warm dilute H2SO4 without effervescence, to give a blue solution? Copper alloy Copper (ll) trioxocarbonate (IV) Copper turnings Copper (ll) oxide 75 / 80 Category: CHEMISTRY PAST QUESTIONS How many electrons are removed from Cr2- when it is oxidized to CrO42-? 0 8 2 4 76 / 80 Category: CHEMISTRY PAST QUESTIONS What is the shape of a molecule of CCI4? Pyramidal Linear Trigonal planar Tetrahedral 77 / 80 Category: CHEMISTRY PAST QUESTIONS What volume of hydrogen is produced at s.t.p. When 2.60 g of zinc reacts with excess HCI according to the following equation? Zn(s) + 2HCI(aq) → ZnCI 2(aq) + H2(g) [Zn = 65; 1 mole of a gas occupies 22.4dm3 at s.t.p] 8.62dm 3 0.040dm 3 5.82dm 3 0.896dm 3 78 / 80 Category: CHEMISTRY PAST QUESTIONS In the Periodic Table, the elements that loss electrons most readily belong to Group 1 A Group 11 A Group 111 A Group V11 A 79 / 80 Category: CHEMISTRY PAST QUESTIONS What is responsible for metallic bonding? Attraction between positive and negative ions Sharing of electrons between the metal atoms transfer of electrons from one atom to another Attraction between the atomic unclei and cloud of electrons 80 / 80 Category: CHEMISTRY PAST QUESTIONS Pipe-borne water is usually chlorinated in order to coagulate sediments in the water remove the hardness in the water clear improve the teste of the water kill harmful bacteria in the water Your score is 0% Restart quiz
SSCE/NECO/GCE (CHEMISTRY PAST QUESTIONS)
CHEMISTRY PAST QUESTIONS APP
Questions will be picked at random from the question bank.
You can use the NEXT button to move to the next question, use the PREVÂ button to move to the previous question, the CLEAR button to clear any answer of your choice and you have the FINISH button to end the exam if you choose to.
Any question not answered before the end of the exam time, will be marked as wrong and the exam will end by itself. so try to attempt all questions on time.
Goodluck!
1 / 80
Category: CHEMISTRY PAST QUESTIONS
Which of the following non-metals reacts most readily with metals?
2 / 80
Dehydration of ethanol produces
3 / 80
What is the function of sulphur (IV) oxide in the reaction represented by the following equation? SO 2(aq) + 2H2S(g) → 3S (s) + 2H 2O (l)
4 / 80
Consider the reaction represented by the following equation: H2(g) + 12(g) → 2HI(g). The number of effective collisions of molecules of the reactants decreases as
5 / 80
Which of the following movements can be described as random motion?
6 / 80
A mixture of calcium chloride and calcium trioxocarbonate (IV) in water can be separated by
7 / 80
Pauli Exclusion Principle is related to
8 / 80
Metals are said to be malleable because they
9 / 80
Rusting of iron is an example of
10 / 80
Exhaust fumes discharged from a smoky vehicle gradually become invisible as a result of
11 / 80
0.10 mol dm-3Â NaCI conducts electricity better than 0.10 mol dm-3Â CH3COOH because the solution of NaCI
12 / 80
Chemical equilibrium is attained when
13 / 80
Which of the following pairs of reagents recat to produce hydrogen?
14 / 80
Two radioactive elements Q and S have half-life periods of 10 hours and 20 hours respectively. Therefore
15 / 80
The property of calcium chloride which makes it useful as a drying agent is that it is
16 / 80
Which of the following statements about ideal gases is/are correct?
I. The cohesive forces between their particles are negligible
ll. The have no definite volume but occupy the volume of their containers
III. They are not compressible
IV. Their particles collide with loss of energy
17 / 80
Which of the following substances decomposes when an electric current is passed through it?
18 / 80
A sheet of paper is placed in the path of a beam from a radioactive source. The emissions that pass through the paper consist of
19 / 80
What is the value of x in the following equation? Cr2O72- + 14H+ + xe- → 2Cr3+ + 7H2O
20 / 80
Which of the following will displace copper from a solution of copper (ll) salt?
21 / 80
Chlorine atom forms CI by
22 / 80
What will be the effect of increase in pressure on the following system at equilibrium? 2NH2(g)Â N2(g)Â + 3H2(g)
23 / 80
What is the effect of using vanadium (V) oxide as catalyst in the reaction represented by the following equation? 2SO2 + O2 ⇌ 2SO3; ∆H = - xKJmol-1
24 / 80
Consider the following equation: Ag+ (aq) + CI-(aq) → Ag+CI- (s) ; ∆H = _65.7 kJmol-1. From the equation, it can be deduced that
25 / 80
Which of the orbitals 4s, 4p, 4d and 4f has the lowest energy?
26 / 80
The type of chemical bond that exists between potassium and oxygen in potassium oxide is
27 / 80
An exothermic reaction is one which involves
28 / 80
When alkanols react with sodium, the ga evolved is
29 / 80
Helium is preferred to hydrogen in filling balloons because hydrogen
30 / 80
If an element with high electron affinity combines with another element with low ionization energy the bond formed will be mainly
31 / 80
Elactrostatic force of attraction between sodium ion and halide ion is greatest in
32 / 80
Which of the following is not correct about oxidation number convention? The oxidation number of a/an
33 / 80
Petrol consists mainly of
34 / 80
A reaction is represented by the equation below. A2(g) + B2(g) 2AB(g); ∆H = +X kJmol-1 Which of the following statements about the system is correct?
35 / 80
Equal volumes of CO2Â cnd CO at s.t.p have the same
36 / 80
A concentrated solution containing H+, Cu2+,OH-Â and CI-Â was electrolysed using platiunm electrodes which of the ions will be discharged at the cathods?
37 / 80
Substances which absorb water from the atmosphere without dissolving in it are said to be
38 / 80
What type of reaction is involved when wood shavings produce a brown gas with concentrated HNO3?
39 / 80
The spontaneity of a chemical reaction is determined by the change in the
40 / 80
One mole of a compound M(HCO3)2Â has a mass of 162g. Calculate the relative atomic mass of M. [H = 1, C =12, O = 16]
41 / 80
Electrovalent compounds are characterized by
42 / 80
A finely divided from of a metal burns more readily in air than the rod from because the rod has
43 / 80
30cm3 pf hydrogen at s.t.p combine with 20cm3 of oxygen to form steam according to the following equation 2H2(g) + O2(g) → 2H2O(g). Calculate the total volume of the gaseous mixture at the end of the reaction
44 / 80
If the solubility of KHCO3Â is 0.40 mole dm-3
45 / 80
Which of the following can undergo both addition reactions and substitution reactions?
46 / 80
What mass of copper would be deposited by a current of 1. 0 ampere passing for 965 seconds through copper (ll) tetraoxosulphate (IV) solution? [Cu = 63.5; 1F = 96500C]
47 / 80
Which of the following lowers the activation energy of a chemical reaction?
48 / 80
Which of the following increases as boiling water changes to steam?
49 / 80
Gas molecules are said to be perfectly elastic because
50 / 80
Which of the following procedures is suitable for identifying the food colouring added to a pastry sample?
51 / 80
Which of the following contains co-ordinate covalent bond?
52 / 80
It can be concluded that gastric juice
53 / 80
Given that the order of reactivity of four metals is P>Q>R>S, which of the following reactions is feasible?
54 / 80
Which of the following properties increases down a group in the Periodic Table?
55 / 80
What is oxidized in the reaction represented by the following equation? 3CU + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O
56 / 80
A radioactive solid is best stored
57 / 80
The crystal layers in graphite are held together by
58 / 80
Which of the following compounds dissolves in water to give an alkaline solution?
59 / 80
The presence of unpaired electrons in an atom of a transition metal gives rise to
60 / 80
Which of the following features of a human skeleton can be determined by carbon-dating?
61 / 80
Aluminium is extracted from
62 / 80
Which of the following will produce oxygen and hydrogen during its electrolysis using platinum electrode?
63 / 80
Which of the following methods is suitable for the preparation of an insoluble salt?
64 / 80
P Total = F1 + P2 + P 3 + .........Pn' where P Total is the pressure of a mixture of gasses. The equation above is an expression of
65 / 80
Which of the following compounds dissolves in water to form a solution with pH below 7?
66 / 80
What does ∆H represent in the following equation ? Cl(g) + e- → CI- (g); ∆H = - 363 kJ mol-1
67 / 80
Which of the following occurs when a solution of CuSO4Â is electrolysed using copper electrodes?
68 / 80
The atoms of four elements are represented as 20Q, 16R, 10S and 8T Which of the elements would be unreactive?
69 / 80
What is the oxidation number of nitrogen in AI(NO3)3?
70 / 80
The gas evolved when dilute tetraoxosulphate (VI) acid reacts with sodium hydrogen trioxocarbonate (IV) is
71 / 80
Elements which belong to the same group in the Periodic Table are characterized by
72 / 80
The liquid product of the destructive distillation of coal is
73 / 80
Calcium atom ionizes by
74 / 80
Which of the following would dissolve in warm dilute H2SO4Â without effervescence, to give a blue solution?
75 / 80
How many electrons are removed from Cr2-Â when it is oxidized to CrO42-?
76 / 80
What is the shape of a molecule of CCI4?
77 / 80
What volume of hydrogen is produced at s.t.p. When 2.60 g of zinc reacts with excess HCI according to the following equation? Zn(s) + 2HCI(aq) → ZnCI 2(aq) + H2(g) [Zn = 65; 1 mole of a gas occupies 22.4dm3 at s.t.p]
78 / 80
In the Periodic Table, the elements that loss electrons most readily belong to
79 / 80
What is responsible for metallic bonding?
80 / 80
Pipe-borne water is usually chlorinated in order to
Your score is
Restart quiz
