NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 1204 - 1209 of 1259

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Question number: 1204

» Chemical Bonding » Ionic and Covalent Bonds

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Question

Polarization is the distortion of the shape of an anion by an adjacently placed cation. Which of the following statements is not correct?

(1) Minimum polarization is brought about by a cation of low radius.

(2) A large cation is likely to bring about a large degree of polarization.

(3) A small anion is likely to undergo a large degree of polarization.

(4) Maximum polarization is brought about by a cation of high charge.

Choices

Choice (4)Response

a.

1 and 2 are correct

b.

1,2 and 3 are correct

c.

1 and 3 are correct

d.

2 and 4 are correct

Question number: 1205

» Chemical Bonding » Ionic Bonding » Factors Affecting the Formation of Ionic Bonds

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Question

The crystal lattice of electrovalent compound is composed of

Choices

Choice (4)Response

a.

Oppositely charged ions

b.

Atoms

c.

Molecules

d.

Molecules and ions

Passage

DIRECTIONS: Read the passage given below and answer the questions that follows:

When a cation approaches an anion closely, the positive charge of a cation attract the electron cloud of the anion towards itself, due to the electrostatic force of attraction between them. At the same time cation also repel the positively charge nucleus of anion.

Due to this combined effect, cloud of anion is bulged or elongated towards the cation. This is called distortion, deformation or Polarization of the anion by the cation and anion is called Polariability:

(I) Ability of anion to get polarised by the cation.

(II) Polarisation of anion causes some sharing of electron between the ions so ionic bond acquires certain covalent character.

(III) Polarisation is of covalent character

(IV) Magnitude of polarisation depends upon a no. of factors, suggested by Fajan and are known as Fajan’s rule.

Question number: 1206 (1 of 3 Based on Passage) Show Passage

» Chemical Bonding » Ionic and Covalent Bonds

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MCQ▾

Question

Compound having highest melting point.

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1207 (2 of 3 Based on Passage) Show Passage

» Chemical Bonding » Ionic Bonding » Formation of Ionic Bonds

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Question

Compound with maximum ionic character is formed from

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1208 (3 of 3 Based on Passage) Show Passage

» Chemical Bonding » Ionic and Covalent Bonds

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Question

Out of the following which one has the highest values of covalent character?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1209

» Atomic Structure » Electronic Configuration of Elements

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MCQ▾

Question

Which follows octet rule?

Choices

Choice (4)Response

a.

b.

c.

d.

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