+2 - Chemistry - Important one mark questions -Third Set - Part 3

Third set of questions from 15-21 are provided below. Refer to the related link section for part 1 and part 2.           

15. In Haber process the value of ∆ng is.

(a) -2                     (b) -1                     (c) -3                     (d) +2

16. The unit of rate of the reaction and rate constant are identical for a -------- order reaction

(a) Zero                 (b) First                 (c) Second             (d) Fractional

17. Alum purifies muddy water by

(a) Dialysis             (b) Absorption       (c) Coagulation      (d) True solution

18. The best adsorbent for the gases is

(a) Benzene           (b) Water               (c) Ether                (d) Gel

19. Fe₂O₃  is used as a catalyst for ------ process

(a) Ostwald            (b) Deacon             (c) Haber               (d) Bergius

20. Ostwald dilution law can be used to determine

(a) K_a                     (b) K_w                    (c) pH                    (d) POH

21. --------- is used in copying inks and stamp pad inks

(a) Glycol               (b) C₆H₅CH₂OH        (c) C₆H₅OH             (d) Glycerol