NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 236 - 242 of 1258

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Question number: 236

» P-Block Elements Group 13 to 18 » Group 15 » Oxides and Oxoacids of Phosphorus

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MCQ▾

Question

The oxyacid of phosphorus in which phosphorus has the lowest oxidation state is?

Choices

Choice (4) Response

a.

Hypo phosphorus acid

b.

Pyro phosphoric acid

c.

Meta phosphoric acid

d.

Ortho phosphoric acid

Question number: 237

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

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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.

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

c.

It does not react

d.

Huge amount of heat is evolved

Question number: 238

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

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Question

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

Choices

Choice (4) Response

a.

Producer gas

b.

Coal gas

c.

Mixture of A and B

d.

Water gas

Question number: 239

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

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MCQ▾

Question

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

Choices

Choice (4) Response

a.

clear solution

b.

a bluish precipitate

c.

a white precipitate

d.

a greenish precipitate

Question number: 240

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

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MCQ▾

Question

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

Choices

Choice (4) Response

a.

N2O

b.

N2O5

c.

N2O4

d.

N2O3

Question number: 241

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

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MCQ▾

Question

What is X and it is used as?

Choices

Choice (4) Response

a.

Organic agent

b.

Oxidizing agent

c.

Inorganic agent

d.

Reducing agent

Question number: 242

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

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MCQ▾

Question

Which of the following is correct?

Choices

Choice (4) Response

a.

NO is a colourless gas and acid in nature

b.

N2O is a laughing gas is angular in shape

c.

NO2 is a sweet smelling and is angular in shape

d.

NO2 on reaction with NaOH gives a mixture of two salts