Chemistry (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 86 - 91 of 142

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Question number: 86

» Chemistry » Metals & Non Metals

MCQ▾

Question

In order to displace Ag from AgNO3 solution, which is the most appropriate metal to be used?

Choices

Choice (4) Response

a.

Gold

b.

Copper

c.

Magnesium

d.

Zinc

Question number: 87

» 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: 88

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

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

4M+3O22M2O3

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: 89

» 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

Question number: 90

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Ankit while heating solid lead nitrate taken in a test-tube, observed

Choices

Choice (4) Response

a.

brown residue of NO

b.

green residue of NO2

c.

yellow residue of PbO

d.

white residue to PbO2

Question number: 91

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

Arrange the following elements in increasing order of their ionization energies

Nb, Sr, Y, Cd, Rb

Choices

Choice (4) Response

a.

Cd<Nb<Y<Sr<Rb

b.

Cd<Rb<Nb<Y<Sr

c.

Sr<Y<Nb<Rb<Cd

d.

Rb<Sr<Y<Nb<Cd

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