NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 212 - 217 of 1259

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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.

Question number: 215

» P-Block Elements Group 13 to 18 » Group 14 » Tendency for Catenation

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MCQ▾

Question

Lime water is formed milky on passing CO2 with the formation of?

Choices

Choice (4)Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

Question number: 216

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

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MCQ▾

Question

When hard water is passed through a column packed with zeolite, calcium and magnesium ions exchange with?

Choices

Choice (4)Response

a.

Sodium

b.

Barium

c.

Zinc

d.

Aluminium

Question number: 217

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

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MCQ▾

Question

Although the ionization potential of boron is less than gold, yet former is non-metal while the latter is a metal?

Choices

Choice (4)Response

a.

Because gold has 12 neighbour atoms

b.

Because boron has 6 atoms as neighbours

c.

Due to the structural difference

d.

All a. , b. and c. are correct

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