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Question: __________ iron is the purest form of iron.
[A].

Cast

[B].

Wrought

[C].

Pig

[D].

High silicon

Answer: Option B

Explanation:

No answer description available for this question.

Question: Hard water
[A].

does not affect the lather formation by soap.

[B].

is not unfit for drinking purpose.

[C].

pollutes the water stream.

[D].

all (a), (b) and (c).

Answer: Option B

Explanation:

No answer description available for this question.

Question: Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on
[A].

slaked lime

[B].

soda lime

[C].

calcium perchlorate

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Basic oxide is absent in __________ glass.
[A].

flint

[B].

pyrex

[C].

quartz

[D].

all (a), (b) & (c)

Answer: Option C

Explanation:

No answer description available for this question.

Question: Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction?
[A].

Oxidation of Na+ ions

[B].

Oxidation of Cl- ions

[C].

Reduction of Na+ ions

[D].

Reduction of Cl- ions

Answer: Option B

Explanation:

No answer description available for this question.

Question: Heating of __________ to 120°C, produces plaster of paris.
[A].

blue vitriol

[B].

gypsum

[C].

calcium silicate

[D].

calcium sulphate

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ is a thermosetting plastic.
[A].

Polyvinyl chloride

[B].

Polythene

[C].

Bakelite

[D].

Teflon

Answer: Option C

Explanation:

No answer description available for this question.

Question: Concentration of sulphide ores is done usually by
[A].

roasting

[B].

smelting

[C].

froth floatation

[D].

electro magnetic separation

Answer: Option C

Explanation:

No answer description available for this question.

Question: Chemical formula of oleum is
[A].

H2SO3

[B].

H2SO4

[C].

H2S2O7

[D].

H2SO7

Answer: Option C

Explanation:

No answer description available for this question.