Chemistry (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 64 - 69 of 144

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Question number: 64

» Chemistry » Structure of Atom

MCQ▾

Question

Consider the flowing statements

I. On moving from left to right in period atomic radii increases.

II. On moving from left to right in period atomic radii decreases. Which of the above statement (s) is/are correct?

Choices

Choice (4) Response

a.

Only II

b.

I and II

c.

Only I

d.

None of the above

Question number: 65

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

10 mL of dilute acetic acid was added to 10 mL of water and this mixture was shaken for a minute. It was observed that

Choices

Choice (4) Response

a.

water formed a separate layer at the bottom

b.

a clear solution was formed

c.

the acid formed a separate layer at the bottom

d.

the turbidity appeared in the test tube

Question number: 66

» Chemistry » Metals & Non Metals

MCQ▾

Question

In order to displace from solution, which is the most appropriate metal to be used?

Choices

Choice (4) Response

a.

Gold

b.

Copper

c.

Magnesium

d.

Zinc

Question number: 67

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Which of the following is an exothermic reaction?

Choices

Choice (4) Response

a.

Respiration

b.

Electrolysis of water

c.

Conversion of limestone into quicklime

d.

Photosynthesis

Question number: 68

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

When a metal ‘M’ reacts with oxygen, following reaction takes place.

This equation represents

Choices

Choice (4) Response

a.

oxidation reaction

b.

reduction reaction

c.

combination and oxidation reaction

d.

displacement and oxidation reaction

Question number: 69

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

Which of the following statements about the modern periodic table is true?

Choices

Choice (4) Response

a.

It has 18 vertical columns called periods

b.

It has 7 vertical columns called periods

c.

It has 7 horizontal rows called groups

d.

It has 18 horizontal rows called periods

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