NEET Chemistry: Questions 207 - 212 of 677

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Question number: 207

» P-Block Elements Group 13 to 18 » Groupwise Study of the P - Block Elements

MCQ▾

Question

The relative Lewis acid characters of boron tri halides are formed to follow the order?

Choices

Choice (4) Response

a.

BI3>BBr3>BCl3<BF3

b.

BI3>BBr3>BCl3>BF3

c.

BI3<BBr3<BCl3<BF3

d.

BI3>BBr3<BCl3>BF3

Question number: 208

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

MCQ▾

Question

Buckminsterfullerene is?

Choices

Choice (4) Response

a.

Bone charcoal

b.

Diamond

c.

C-60

d.

Graphite

Question number: 209

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

MCQ▾

Question

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

Choices

Choice (4) Response

a.

producer gas (CO + N2)

b.

CO2

c.

CO

d.

All of the above

Question number: 210

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

MCQ▾

Question

Which of the following compound does not exist?

Choices

Choice (4) Response

a.

B2H2(CH3)4

b.

B2H4(CH3)2

c.

B2H3(CH3)2

d.

B2H(CH3)5

Question number: 211

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

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

MCQ▾

Question

The general formula of cyclic or ring silicates is?

Choices

Choice (4) Response

a.

(SiO3)n2n

b.

(SiO5)n2n

c.

(SiO32)n

d.

Both a. and c. are correct

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