Sr. # | Questions | Answers Choice |
---|---|---|
1 | The enthalpy of formation of a compound is | Positive Either positive or negative Negative None |
2 | The values of ∆H for the process l(g)+e-1---------> I-1(g) is: |
>0 <0 0 None |
3 | Calorie is equivalent to | 0.4184J 4.184J 418.4J 40.18J |
4 | If a reaction involves only solids and liquids, which of the following is true? | ΔH = ΔE ΔΗ =ΔΕ ΔH>ΔΕ AH =AE +nRT |
5 | NaOH+HCI- NaCI+ H2O. Enthalpy change in the above reaction is called | Enthalpy of reaction Enthalpy of Neutralisation Enthalpy of formation Enthalpy of combustion |
6 | Hess's law is analogous to | Law of heat summation law of increasing entropy Law of heat exchange Ist law of thermodynamics |
7 | The net heat change in a chemical reaction is the same whether it is brought about in two or more different ways in one or several steps.it is known as | Henry's law Hess's law joule's law Law of conservation of energy |
8 | Which of the following has positive value of enthalpy | Neutralisation Atomization combustion All of the above |
9 | For an endothermic reaction, enthalpy of reactants | Is smaller than that of the products Is greater than that of the products Must be greater or smaller than that of the products Is equal to that of the products |
10 | Enthalpy of neutralization of strong acids and strong bases have same values because | Neutralization leads to the formation of salt and water Acids always give rise to H+ and bases always furnish OH- Strong acids and bases are ionic substances The net change involves the combination of H and OH ions to form water |