NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 294 - 299 of 1258

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Question number: 294

» P-Block Elements Group 13 to 18 » Group 16 » Allotropic Forms of Sulphur

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Question

The number of lone pairs and number of S-S bonds in S8 molecules are respectively?

Choices

Choice (4) Response

a.

16,8

b.

8,8

c.

8,4

d.

8.16

Question number: 295

» P-Block Elements Group 13 to 18 » Group 18 » Noble Gases

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Question

Helium is added to oxygen used by deep sea divers because?

Choices

Choice (4) Response

a.

it is lighter than nitrogen

b.

it is readily miscible with oxygen

c.

it is less poisonous than nitrogen

d.

it is less soluble in blood than nitrogen under high pressure

Question number: 296

» Basic Concepts in Chemistry » Molar Mass

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Question

The density of at NTP is 1.429 . Calculate the standard molar volume of gas-

Choices

Choice (4) Response

a.

33.6 lit

b.

5.6 lit.

c.

11.2 lit

d.

22.4 lit.

Question number: 297

» P-Block Elements Group 13 to 18 » Group 17 » Oxides and Oxoacids of Halogens

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Question

When chlorine water is added to an aqueous solution of sodium halide in the presence of chloroform, a violet coloration is obtained. When more of chlorine water is added, the violet coloration disappears and solution becomes colorless. This confirms that sodium halide is?

Choices

Choice (4) Response

a.

Iodide

b.

Bromide

c.

chlorine

d.

fluoride

Question number: 298

» P-Block Elements Group 13 to 18 » Group 17 » Hydrogen Halides

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Question

The substance, which is solid at room temperature, forms ionic compounds and reacts with hydrogen forming a hydride, the aqueous solution of which is acidic, may be?

Choices

Choice (4) Response

a.

Na

b.

Al

c.

I2

d.

Br2

Question number: 299

» P-Block Elements Group 13 to 18 » Group 17 » Oxides and Oxoacids of Halogens

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Question

Which one of the following statement is correct?

Choices

Choice (4) Response

a.

ClO2 is the anhydride of HClO2 and HClO3

b.

I2O5 is used in the quantitative estimation of CO

c.

ClO2 and Cl2O are used as bleaching agents and as germicides

d.

All a. , b. and c. are correct