Chemistry (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 30 - 34 of 142

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Question number: 30

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

aMg 3 N 2 + bH 2O

cMg (OH) 2 + dNH 3. When the equation is balanced, the coefficients a, b, c and d respectively, are

Choices

Choice (4) Response

a.

1, 3, 3, 2

b.

2, 3, 6, 2

c.

1, 2, 3, 2

d.

1, 6, 3, 2

Question number: 31

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Which of the following characteristics are associated with gaseous state?

Choices

Choice (4) Response

a.

Definite shape, compressible, fixed volume

b.

Fixed shape, incompressible, closely packed

c.

No fixed shape and size, highly compressible

d.

Incompressible, fixed shape and size

Question number: 32

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?

Choices

Choice (4) Response

a.

By cyanobacteria

b.

By denitrification

c.

By electrical discharges in the atmosphere

d.

By industrially synthesised fertiliser

Question number: 33

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

The kinetic energy of the particle increases on increasing the

Choices

Choice (4) Response

a.

pressure

b.

temperature

c.

humidity

d.

All of the above

Question number: 34

» Chemistry » Carbon and Its Compounds

MCQ▾

Question

When you are finished using a Bunsen burner you should

Choices

Choice (4) Response

a.

leave it on for the next person to use. It’s the only considerate choice

b.

pull off the hose connecting the burner to the gas. The burner won’t have gas so it won’t be on fire

c.

cover the burner with an inverted beaker to suffocate the flame

d.

turn off the gas

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