NEET (National Eligibility cum Medical Entrance Test) Chemistry: Questions 237 - 243 of 1145

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Question number: 237

» P-Block Elements Group 13 to 18 » Group 14 » Allotropes of Carbon

MCQ▾

Question

H2SO4 is not used for the preparation of CO2 from marble chips because?

Choices

Choice (4) Response

a.

The reaction is vigorous

b.

Huge amount of heat is evolved

c.

It does not react

d.

Calcium sulphate is sparingly soluble and gets deposited on the marble chips

Question number: 238

» P-Block Elements Group 13 to 18 » Group 14 » Allotropes of Carbon

MCQ▾

Question

When a mixture of air and steam is passed over red hot cokes, the outgoing gas contains?

Choices

Choice (4) Response

a.

Water gas

b.

Mixture of A and B

c.

Producer gas

d.

Coal gas

Question number: 239

» P-Block Elements Group 13 to 18 » Group 13 » Aluminum

MCQ▾

Question

When excess of NaOH solution is added in potash alum, the product is?

Choices

Choice (4) Response

a.

a greenish precipitate

b.

a white precipitate

c.

clear solution

d.

a bluish precipitate

Question number: 240

» P-Block Elements Group 13 to 18 » Group 15 » Nitrogen

MCQ▾

Question

Blue liquid which is formed at -300C by mixing of two gases is?

Choices

Choice (4) Response

a.

N2O4

b.

N2O

c.

N2O3

d.

N2O5

Question number: 241

» P-Block Elements Group 13 to 18 » Group 13 » Boron

MCQ▾

Question

Equation What is X and it is used as?

Choices

Choice (4) Response

a.

Organic agent

b.

Oxidizing agent

c.

Reducing agent

d.

Inorganic agent

Question number: 242

» P-Block Elements Group 13 to 18 » Group 15 » Nitrogen

MCQ▾

Question

Which of the following is correct?

Choices

Choice (4) Response

a.

NO2 on reaction with NaOH gives a mixture of two salts

b.

NO2 is a sweet smelling and is angular in shape

c.

N2O is a laughing gas is angular in shape

d.

NO is a colourless gas and acid in nature

Question number: 243

» P-Block Elements Group 13 to 18 » Group 13 » Aluminum

MCQ▾

Question

Aqueous solution of borax acts as a buffer because?

Choices

Choice (4) Response

a.

It contains weak acid and its salt with strong base

b.

It contains number of neutral water molecules

c.

It contains tribasic acid and strong base

d.

Question does not provide sufficient data or is vague

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