COMPETENCY BASED (MCQ) part :- iv chapter :-1 chemical reaction class 10

CLASS IX, X , XI , XII , NEET and JEE class 10  

                    COMPETENCY BASED 

                  (PISA BASED QUESTIONS)

                              part :- iv

                chapter :-1 chemical reaction  
                              class 10

1. . The displacement reaction between iron (III) oxide and a metal X is used for welding the rail tracks. Here X is: .
 

(i) Copper granules
b. Magnesium ribbon
(iii) Sodium pellets
(iv) Aluminium dust

... Answer is iv)
Aluminium dust"

2. The neutralization reaction between an acid and a base is a type of:. 

(i) Double displacement reaction
(ii) Displacement reaction.
(iii) Addition reaction.
(iv) Decomposition reaction

... Answer is i)
(i) Double displacement reaction".

 3. All the methods mentioned below can be used to prevent the food from getting rancid except: i. Storing the food in the air-tight containers ii. Storing the food in refrigerator iii. Keeping the food in clean and covered containers iv. Always touching the food with clean hands . 
:

(i) (i) and (ii).
(ii)(i) and (iii)
(iii) (i), (iii) and (iv).
(iv) (iii) and (iv) .

... Answer is iv)
. (iii) and (iv).".

4. Rusting of iron involves a chemical reaction which is a combination of:. :

(i) Reduction as well as combination reactions
(ii) Oxidation as well as combination reactions.
(iii) Reduction as well as displacement reactions
(iv) Oxidation as well as displacement reactions

... Answer is ii)
Oxidation as well as combination reactions ".

5. Before burning in air, the magnesium ribbon is cleaned by rubbing with a sand paper to: .
 

(i) Make the ribbon surface shinier.
(ii) Remove the layer of magnesium oxide from the ribbon surface
(iii) Remove the layer of magnesium carbonate from the ribbon surface
(iv) Remove the moisture from the ribbon surface

... Answer is iii)
Remove the layer of magnesium carbonate from the ribbon surface".

6. In a chemical reaction between sulphuric acid and barium chloride solution the white precipitates formed are of: .
 .

(i) Hydrochloric acid
(ii) Barium sulphate
(iii) Chlorine.
(iv) Sulphur.
... Answer is ii)
(ii) Barium sulphate ".



7. The respiration process during which glucose undergoes slow combustion by combining with oxygen in the cells of our body to produce energy, is a kind of: .
 

(i) Exothermic process
(ii) Endothermic process
(iii) Reversible process
(iv) Physical process

... Answer is i)
(i) Exothermic process".



8. A chemical reaction does not involve. 


(i) Formation of new substances having entirely different properties than that of the reactants.
(ii) Breaking of old chemical bonds and formation of new chemical bonds
(iii) Rearrangement of the atoms of reactants to form new products
((iv) Changing of the atoms of on element into those of another element to form new products

... Answer is iv)
(iv) Changing of the atoms of on element into those of another element to form new products.".



9. It is necessary to balance a chemical equation in order to satisfy the law of: .
 

(i) Conservation of motion
(ii) Conservation of momentum.
(iii) Conservation of energy
(iv) Conservation of mass.

... Answer is iv)
(iv)Conservation of mass.".



10. Which of the following gases is used in the storage of fat and oil containing foods for a long time? .
 

(i) Carbondioxide gas
(ii) Nitrogen gas.
(iii) Oxygen gas.
(iv) Neon gas .

... Answer is ii)
(ii) Nitrogen gas".