Polytechnic TRB Chemistry Model Question Paper with Answer Keys - 5

Question: 21

Enzyme catalyst is an example of

(A) Induced catalysts

(B) Homogeneous catalysts

(C) Heterogeneous catalysts

(D) Auto catalysts

Question: 22

The characteristics odour of garlic is due to

(A) A chloro compound

(B) A sulphur compound

(C) A fluorine compound

(D) Acetic acid

Question: 23

Name the chemical reagent to which glass does not have resistance

(A) Hydrochloric acid

(B) Hydrofluoric acid

(C) Hydrobromic acid

(D) Hydroiodic acid

Question: 24

Pure water does not conduct electricity because it is

(A) Almost not ionized

(B) Low boiling

(C) Neutral

(D) Readily decomposed

Question: 25

The plant cell will shrink when placed in

(A) An isotonic solution

(B) Hypertonic solution

(C) Water

(D) Hypotonic solution