Set-1 Set-2 Set-3 Set-4 Set-5

Set 2

1. Take about 5 ml of dilute HCl in a test tube and add a few pieces of fine granules of zinc in it. Which gas is evolved?

(a) Chlorine
(b) Hydrogen
(c) HCl
(d) Nitrogen

2. Dissolving sugar is an example of:

(a) Physical change
(b) Chemical change
(c) Redox reaction
(d) None of these

3. Heat is evolved during:

(a) Endothermic reaction
(b) Displacement reaction
(c) Combustion reaction
(d) Combination reaction

4. Which of the following is not a balanced equation?

(a) Fe + Cl₂ → FeCl₃
(b) Mg + CuSO₄ → MgSO₄ + Cu
(c) NaOH + HCl → NaCl + H₂O
(d) Zn + S → ZnS

5. The reaction between lead nitrate and potassium iodide present in aqueous solution is an example of:

(a) Decomposition reaction
(b) Displacement reaction
(c) Double displacement reaction
(d) Neutralization reaction

6. What happens when dilute hydrochloric acid is added to iron filings?

(a) Hydrogen gas and iron chloride are produced
(b) Chlorine gas and iron hydroxides are produced
(c) No reaction takes place
(d) Iron salt and water are produced

7. Which of the following gases can be used for the storage of a fresh sample of an oil for a longer time?

(a) Carbon dioxide or oxygen
(b) Nitrogen or helium
(c) Helium or oxygen
(d) Nitrogen or oxygen

8. In the decomposition of lead (II) nitrate to give lead (II) oxide, nitrogen dioxide and oxygen gas, the coefficient of nitrogen dioxide (in the balanced equation) is:

(a) 1
(b) 2
(c) 3
(d) 4

9. We store silver chloride in dark colored bottles because it is:

(a) A white solid
(b) Undergoes redox reaction
(c) To avoid action by sunlight
(d) None of the above

10. Silver articles turn black when kept in the open for a few days due to the formation of:

(a) H₂S
(b) AgS
(c) AgSO₂
(d) Ag₂S
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