1. . It is that branch of chemistry which deals with the heat changes accompanying the chemical reactions, is called:
(A) Organic chemistry
(B) Inorganic chemistry
(C) All three
(D) Thermochemistry
2. . The amount of heat evolved or absorbed during a chemical reaction is known as:
(A) Heat of formation
(B) Heat of reaction
(C) Heat of combustion
(D) Heat of neutralisation
3. . The amount of heat evolved when one mole of a substance is completely burnt or oxidised is called:
(A) Heat of formation
(B) Heat of reaction
(C) Heat of combustion
(D) Heat of neutralisation
4. . The amount of heat evolved when one gram equivalent of an acid is neutralised by one gram equivalent of a base is called:
(A) Heat of formation
(B) Heat of reaction
(C) Heat of combustion
(D) Heat of neutralisation
5. . The heat of neutralisation of a strong acid by a strong base is always the same i.e., 57.32 KJ/mol:
(A) Heat of neutralisation
(B) Heat of reaction
(C) Heat of combustion
(D) Heat of formation
6. . The heat of neutralisation of HCOOH with NH4OH is –49.8 KJ/mol:
(A) Heat of formation
(B) Heat of reaction
(C) Heat of combustion
(D) Heat of neutralisation
7. . A Swiss scientist G.H. Hess presented his law in:
(A) 1838
(B) 1940
(C) 1840
(D) 1839
8. . The law also known as “Hess’s law of heat combustion” & “Hess’s law of heat summation” is:
(A) Boyle’s law
(B) Hess's law
(C) Charles law
(D) None
9. . Hess’s law is simply a basic practical application of the ‘law of conservation of energy’:
(A) Hess's law
(B) Boyle’s law
(C) Charles law
(D) None
10. . ΔH = ΔH1 + ΔH2 + ΔH3 is the equation of:
(A) Charles law
(B) Boyle’s law
(C) Hess's law
(D) None
11. . Such type of chemical reactions in which heat is given out or liberated during a chemical reaction is called:
(A) Endothermic reactions
(B) Exothermic reactions
(C) Heat of formation
(D) Heat of neutralisation
12. . Exothermic reactions are indicated by a minus (–) symbol:
(A) Heat of formation
(B) Endothermic reactions
(C) Exothermic reactions
(D) Heat of neutralisation
13. . The burning of methane, formation of water and ammonia are examples of:
(A) Exothermic reactions
(B) Endothermic reactions
(C) Heat of formation
(D) Heat of neutralisation
14. . Such type of chemical reactions in which heat is absorbed during a chemical reaction is called:
(A) Exothermic reactions
(B) Heat of formation
(C) Endothermic reactions
(D) Heat of neutralisation
15. . Endothermic reactions are indicated by a positive (+) symbol:
(A) Exothermic reactions
(B) Heat of neutralisation
(C) Heat of formation
(D) Endothermic reactions
16. . The formation of NO, HI and CS2 are examples of:
(A) Exothermic reactions
(B) Heat of formation
(C) Endothermic reactions
(D) Heat of neutralisation
17. . The unit of heat in SI system is:
(A) Calorie
(B) Kilocalorie
(C) BTU
(D) Joule
18. . The amount of heat required to raise the temperature of 1 gram of water through 1°C from 14.5 to 15.5°C is called:
(A) Calorific value
(B) Kilocalorie
(C) Calorie
(D) BTU
19. . The amount of heat required to raise the temperature of 1 pound of water through 1°F from 60°F to 61°F is called:
(A) Calorie
(B) Kilocalorie
(C) BTU
(D) Calorific value
20. . The amount of heat evolved by the complete combustion of unit mass or volume of the fuel is called:
(A) Calorie
(B) Kilocalorie
(C) Calorific value
(D) BTU