Chemistry (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 108 - 113 of 144

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Question number: 108

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

Consider the following statements

I. A freshly prepared mixture of 1: 3 ratio of cone HNO3: cone HCl.

II. Highly corrosive, fuming liquid.

III. It can dissolve all metal even Au and Pt.

The incorrect statements are

Choices

Choice (4) Response

a.

II and III

b.

I and II

c.

I, II and III

d.

None of the above

Question number: 109

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Consider the following statements

I. The only two non-silvery metals are Cu and Au.

II. Hot peppers get their heat from capsaicin.

III. Bee stings are alkaline while wasp stings are acidic.

Which of the above statements is/are correct?

Choices

Choice (4) Response

a.

Only III

b.

I and II

c.

Only I

d.

I and III

Question number: 110

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

The changing of a solid directly into vapour on heating is called

Choices

Choice (4) Response

a.

Chromatography

b.

Crystallisation

c.

Sublimation

d.

Distillation

Question number: 111

» Chemistry » Fibres and Plastics

MCQ▾

Question

Helium balloons float in air why?

Choices

Choice (4) Response

a.

It has same weight as that of air

b.

It is heavier than air

c.

It is lighter than air

d.

None of the above

Question number: 112

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

Elements given below forms a group alike except one. Identify the odd one.

Holmium, Copernicium, Kryptonite, Berkelium

Choices

Choice (4) Response

a.

Copernicium

b.

Holmium

c.

Kryptonite

d.

Berkelium

Question number: 113

» Chemistry » Carbon and Its Compounds

MCQ▾

Question

The oxide of which of the following elements is used as a coolant?

Choices

Choice (4) Response

a.

Nitrogen

b.

Silicon

c.

Carbon

d.

Phosphorus

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