A crystal which has the same unit cell and contains the same lattice points throughout the crystal is_________.

(a)

perfect

(b)

imperfect

(c)

distorted

(d)

both (b) and (c)

In the acid hydrolysis of an ester, what is the time taken for complete hydrolysis?

(a)

8 hours

(b)

45 minutes

(c)

both (a) and (b)

(d)

None 

pH of a solution can be kept constant with the help of __________ solution.

(a)

saturated

(b)

unsaturated

(c)

super saturated

(d)

buffer

SHE is _______.

(a)

Standard Helium Electorde

(b)

Standard Hydrogen Electrode

(c)

Standard Mercury Electrode

(d)

none of these

Argyrol is_______.

(a)

colloidal silver

(b)

colloidal antimony

(c)

colloidal gold

(d)

milk of magnesia

On heating, peroxides are ________.

(a)

stable

(b)

unstable

(c)

decomposes violently

(d)

both (b) and (c)

Weakest acid among the following is __________.

(a)

acetic acid

(b)

phenol

(c)

water

(d)

acetylene

Use of chloropicrin is as ____________

(a)

explosive

(b)

dye

(c)

anaesthetic

(d)

sterilizing agent

Alanyl glycine is_______

(a)

dipeptide

(b)

tripephide

(c)

polypeptide

(d)

nucleic acid

Polyester is ________

(a)

an addition polymer

(b)

a condensation polymer

(c)

a copolymer

(d)

none