Total Marks: 20 Class
: X
(Chapter: Chemical
reactions and Equations)
1. The reaction H2 +
Cl2 2HCl
(a) Oxidation (c)
Decomposition
(b) Reduction (d)
Combination
2. When dil HCl is added to Zinc pieces taken in a test tube
(a) no change takes
place
(b) H2
gas bubble appear
(c) pungent gas
evolved
(d) it turns milky
3. Heat is evolved during which reaction
(a) endothermic
reaction (c)
combination reaction
(b) exothermic
reaction (d)
displacement reaction
4. Why food particles are packed in aluminum foil?
5. Identify the substance oxidized and reduced in the
following reaction
CuO(s) + Zn(s) ZnO (s)
+ Cu(s)
6. Why is combustion reaction an oxidation reaction?
7. Identify the type of reaction in the following
(a) A B + C (b) AB + CD AD + CB
8. In the reaction
MnO2 + 4HCl MnCl2 + 2H2O
+ Cl2
(a) Name
the substance oxidized
(b) Name
the oxidizing agent
(c) Name
the reducing agent and the substance reduced
9. Write the balanced equation for the following
(a) Potassium bromide (aq) + Barium
iodide (aq) Potassium
iodide (aq) +
Barium
bromide (aq)
(b) Zinc carbonate (s) Zinc oxide (s) Carbon dioxide
(g) (c) Hydrogen (g) + Chlorine (g) Hydrogen chloride
10. Balance the equation:
(a) HNO3 + Ca(OH)2 Ca(NO)2 + H2O
(b) NaCl + AgNO3 AgCl + NaNO3
(c) BaCl2 + H2SO4 BaSO4 + HCl
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