NEET Chemistry: Questions 194 - 200 of 677

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Question number: 194

» D and F Block Elements » Transition Elements » Trends in Properties

MCQ▾

Question

Zinc becomes dull in moist air, due to the formation of which compound?

Choices

Choice (4) Response
a.

Zinc Carbonate

b.

Zinc Chloride

c.

Zinc sulphate

d.

Zinc oxide.

Question number: 195

» D and F Block Elements » Inner Transition Elements » Actinides

MCQ▾

Question

The maximum oxidation state exhibited by actinide ions is?

Choices

Choice (4) Response
a.

+7

b.

+8

c.

+5

d.

+6

Question number: 196

» D and F Block Elements » Transition Elements » Trends in Properties

MCQ▾

Question

Name the compound of dichromate used in volcano experiment?

Choices

Choice (4) Response
a.

(NH4)2Cr2O7

b.

(NH4)2Cr2O3

c.

(NH4)5Cr2O7

d.

(NH4)3Cr2O7

Question number: 197

» D and F Block Elements » Transition Elements » Trends in Properties

MCQ▾

Question

A little acid is always added in the preparation of aqueous ferrous sulphate solution, why?

Choices

Choice (4) Response
a.

To reach neutralization

b.

To catalyze the hydrolysis

c.

To make solution more acidic

d.

To prevent hydrolysis

Question number: 198

» D and F Block Elements » Inner Transition Elements » Lanthanides

MCQ▾

Question

What is the lanthanide oxide used for making coloured goggles?

Choices

Choice (4) Response
a.

Cerium oxide

b.

Samarium oxide

c.

Lanthanum oxide

d.

Neodymium oxide

Question number: 199

» D and F Block Elements » Transition Elements » Trends in Properties

MCQ▾

Question

The 3d metal ions are generally paramagnetic in nature because?

Choices

Choice (4) Response
a.

they are reducing agents

b.

they form coloured salts

c.

they have one or more paired s electrons

d.

they have one or more unpaired d electrons

Question number: 200

» D and F Block Elements » Transition Elements » Trends in Properties

MCQ▾

Question

Silver halides are used in photography because these compounds are?

Choices

Choice (4) Response
a.

affected by light

b.

soluble in ammonia solution

c.

easily sticks on the surface of photographic plate

d.

insoluble in water

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