Chemistry (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 42 - 48 of 63

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 828 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 400.00 or

Question number: 42

» Chemistry » Structure of Atom

MCQ▾

Question

The only element having no neutron is

Choices

Choice (4) Response

a.

Protium

b.

Deuterium

c.

Tritium

d.

None of the above

Question number: 43

» Chemistry » Metals & Non Metals

MCQ▾

Question

The correct order of electrical conductivity is

Choices

Choice (4) Response

a.

Cu>Ag>Al>Au

b.

Au>Ag>Al>Cu

c.

Al>Au>Cu>Ag

d.

Ag>Cu>Au>Al

Question number: 44

» Chemistry » Structure of Atom

MCQ▾

Question

Isotopes differ in the number of

Choices

Choice (4) Response

a.

Electrons

b.

Neutrons

c.

protons

d.

Nucleons

Question number: 45

» Chemistry » Structure of Atom

MCQ▾

Question

A divalent cation has 10 electrons and 12 neutrons. The atomic number and mass number of the elements are

Choices

Choice (4) Response

a.

12, 24

b.

10, 22

c.

11, 25

d.

8, 12

Question number: 46

» Chemistry » Fibres and Plastics

MCQ▾

Question

Man-made synthetic fiber is

Choices

Choice (4) Response

a.

Nylon

b.

Rayon

c.

Wool

d.

Cotton

Question number: 47

» Chemistry » Carbon and Its Compounds

MCQ▾

Question

Coal is a fossil fuel and it cannot be prepared in a laboratory or industry because the formation of coal

I. is a very slow process.

II. needs very low pressure and low temperature.

III. needs very high pressure and high temperature.

IV. causes air pollution.

Select the correct alternative.

Choices

Choice (4) Response

a.

III and I

b.

II and IV

c.

IV and III

d.

I and II

Question number: 48

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Washing soda (Na2CO3.10H2O) on exposure to air gives

Choices

Choice (4) Response

a.

Na2CO3.H2O

b.

Na2CO3.9H2O

c.

Na2CO3.7H2O

d.

Na2CO3.5H2O

f Page
Sign In