Class 10th Chemistry chapter 1


Total Marks: 20

1. The reversible reaction is shown by
Single-headed arrow Double-headed arrow By single and double-headed both None of the above
2. The irreversible reaction is shown by
Single-headed arrow Double-headed arrow By single and double-headed both None of the above
3. The reaction in which the reactants are completely consumed and formed products and no amount of reactants left behind are called
Reversible reaction Irreversible reaction Forward reaction None of these
4. The reaction in which products react and go in a backward direction and yield reactants again is called
Reversible reaction Irreversible reaction Complete reaction Both a and c
5. The law of mass action was proposed by
Charles P. Waage C.M Gulberg Both b and c
6. Which of the following reaction helps to achieve dynamic equilibrium
Irreversible reaction Reversible reaction Both a and b Chemical reaction
7. When the rate of forward reaction becomes equal to the rate of backward reaction then this state is called
Chemical equilibrium Stable equilibrium Un-stable equilibrium Both a and b
8. The product of ratio of forward reaction and reverse reaction is called
Kn Kp Kc Kx
9. The proportionality constant for forward reaction is
Kr Kf Kp Kc
10. The proportionality constant of the reverse reaction is
Kr Kf Kx Kc
11. Active mass represents the
Molar concentration of reactants Reactants and products temperature Reactants and products pressure Reactants and products volum
12. Active Mass of substance is _________ in a dilute solution
KJ mol/dm3 g/liter Coulomb
13. The concentration of reactants and products can be expressed in terms of
( ) [ ] { } None of the above
14. In Kc the small c donates
Direction Molar concentration Coefficient Both a and c
15. Kc depends upon the
Temperature Pressure Volume None of the above
16. On the initial concentration of reactants and products, one constant is independent
Kc Kn Kf Kr
17. Which of the following is not determined by Kc
Chemical reaction’s direction Chemical reaction’s extent Equilibrium’s mixture concentration when the initial concentration of reactants is known Catalyst used in a reaction
18. The process by which ammonia is synthesized is called
Contact process Haber process Titration Spectroscopy
19. The process by which sulfuric acid is synthesized is called
Contact process Haber process Titration Spectroscopy
20. Le Chatellier’s principle is used to
Decrease the yield of produc Increase the yield of reactants Increase the yield of produc Decrease the yield of reactants