THERMO-CHEMISTRY MCQs

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1. . It is that branch of chemistry which deals with the heat changes accompanying the chemical reactions, is called:





2. . The amount of heat evolved or absorbed during a chemical reaction is known as:





3. . The amount of heat evolved when one mole of a substance is completely burnt or oxidised is called:





4. . The amount of heat evolved when one gram equivalent of an acid is neutralised by one gram equivalent of a base is called:





5. . The heat of neutralisation of a strong acid by a strong base is always the same i.e., 57.32 KJ/mol:





6. . The heat of neutralisation of HCOOH with NH4OH is –49.8 KJ/mol:





7. . A Swiss scientist G.H. Hess presented his law in:





8. . The law also known as “Hess’s law of heat combustion” & “Hess’s law of heat summation” is:





9. . Hess’s law is simply a basic practical application of the ‘law of conservation of energy’:





10. . ΔH = ΔH1 + ΔH2 + ΔH3 is the equation of:





11. . Such type of chemical reactions in which heat is given out or liberated during a chemical reaction is called:





12. . Exothermic reactions are indicated by a minus (–) symbol:





13. . The burning of methane, formation of water and ammonia are examples of:





14. . Such type of chemical reactions in which heat is absorbed during a chemical reaction is called:





15. . Endothermic reactions are indicated by a positive (+) symbol:





16. . The formation of NO, HI and CS2 are examples of:





17. . The unit of heat in SI system is:





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:





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:





20. . The amount of heat evolved by the complete combustion of unit mass or volume of the fuel is called:





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