NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 208 - 214 of 1258

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Question number: 208

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

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MCQ▾

Question

Buckminsterfullerene is?

Choices

Choice (4) Response

a.

C-60

b.

Graphite

c.

Bone charcoal

d.

Diamond

Question number: 209

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

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MCQ▾

Question

Which of the following gas played an important role in phenomenon ASPHYXIA?

Choices

Choice (4) Response

a.

producer gas (CO + N2)

b.

CO

c.

CO2

d.

None of the above

Question number: 210

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

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MCQ▾

Question

Which of the following compound does not exist?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 211

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

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MCQ▾

Question

Bauxite ore is generally contaminated with impurity of oxides of two elements E1and E2. Which of the following statements is correct?

Choices

Choice (4) Response

a.

E1 is a non-metal and belongs to 3rd period while E2 is a metal and belong to fourth period

b.

One of the two oxides has three dimensional polymeric structures

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

Question number: 212

» P-Block Elements Group 13 to 18 » Group 14 » Silicates

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MCQ▾

Question

The general formula of cyclic or ring silicates is?

Choices

Choice (4) Response

a.

b.

c.

d.

Both b. and c. are correct

Question number: 213

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

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MCQ▾

Question

Boron has an unusually high melting point due to?

Choices

Choice (4) Response

a.

Very strong crystalline lattice

b.

Allotropy

c.

Smaller size than beryllium

d.

Inert pair effect

Question number: 214

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

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MCQ▾

Question

The state of hybridization of the central atom and the number of lone pairs over the central atom in POCl3 are?

Choices

Choice (4) Response

a.

b.

c.

d.