NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 742 - 746 of 1258

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Question number: 742

» Atomic Structure » Quantum Mechanics

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MCQ▾

Question

The ‘m’ value for an electron in an atom is equal to the number of m values for The electron may be present in

Choices

Choice (4) Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

Question number: 743

» Basic Concepts in Chemistry » Matter and Its Nature

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MCQ▾

Question

Which one of the following statement is incorrect?

Choices

Choice (4) Response

a.

All elements are homogeneous

b.

Compounds always contain two or more different elements

c.

A Mixture is not always heterogeneous

d.

Air is a heterogeneous mixture

Question number: 744

» Hydrocarbons » Alkynes » Acidic Character

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Assertion-Reason▾

Question

Assertion (Ꭺ)

1-Alkynes are considered as weak acids.

Reason (Ꭱ)

Hydrogen atom attached to the triply bond carbon atom can be easily removed by strong base.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 745

» Chemical Bonding » Covalent Bonding » Valence Shell

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Appeared in Year: 2016

MCQ▾

Question

Which of the following pairs of ions is isoelectronic and isostructural?

Choices

Choice (4) Response

a.

b.

,

c.

,

d.

,

Question number: 746

» Atomic Structure » Shapes of S, P and D - Orbitals

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Appeared in Year: 2016

MCQ▾

Question

The hybridizations of atomic orbitals of nitrogen in , and respectively are

Choices

Choice (4) Response

a.

Sp2, sp3 and sp

b.

Sp, sp3 and sp2

c.

Sp2, sp and sp3

d.

Sp, sp2 and sp3