NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 196 - 201 of 1258

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Question number: 196

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

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Question

Name the compound of dichromate used in volcano experiment?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 197

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

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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 prevent hydrolysis

d.

To make solution more acidic

Question number: 198

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

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Question

What is the lanthanide oxide used for making coloured goggles?

Choices

Choice (4) Response

a.

Neodymium oxide

b.

Lanthanum oxide

c.

Samarium oxide

d.

Cerium oxide

Question number: 199

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

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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

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MCQ▾

Question

Silver halides are used in photography because these compounds are?

Choices

Choice (4) Response

a.

insoluble in water

b.

soluble in ammonia solution

c.

easily sticks on the surface of photographic plate

d.

affected by light

Question number: 201

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

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Question

The reason for the stability of Gd +3 ions is?

Choices

Choice (4) Response

a.

possesses the electronic configuration of inert gases

b.

empty 4 f shell

c.

half-filled 4 f shell

d.

completely filled 4 f sub shell