NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 685 - 691 of 1195

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Question number: 685

» Basic Concepts in Chemistry » SI Units

MCQ▾

Question

, is the SI unit of?

Choices

Choice (4) Response

a.

Volume

b.

Pressure

c.

Force

d.

Density

Question number: 686

» Basic Concepts in Chemistry » Concept of Atom, Molecule, Element and Compound

MCQ▾

Question

The most abundant element in earth’s crust is?

Choices

Choice (4) Response

a.

Oxygen

b.

Hydrogen

c.

Silicon

d.

Nitrogen

Question number: 687

» Basic Concepts in Chemistry » Molar Mass

MCQ▾

Question

The number of hydrogen atoms present in of sucrose which has a molar mass of is?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 688

» Hydrocarbons » Preparation, Properties and Reactions

Assertion-Reason▾

Assertion (Ꭺ)

Cyclobutan is less stable than cyclopentane

Reason (Ꭱ)

Presence of bent bonds causes “loss of orbital overlap”.

Choices

Choice (4) Response

a.

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

b.

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

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is true but Ꭱ is false

Question number: 689

» Organic Compounds With Oxygen » Preparation, Properties and Reactions and Uses

MCQ▾

Question

Which reagent is useful in converting 1-butanol to 1-bromobutane?

Choices

Choice (4) Response

a.

CHBr3

b.

PBr3

c.

CH3Br

d.

Br2

Question number: 690

» Basic Concepts in Chemistry » Molar Mass

MCQ▾

Question

How many atoms do a mercury vapour molecule consist of, if the vapour density of mercury vapour relative to air is . The molarmass of air is ?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 691

» Atomic Structure » Rules for Filling Electrons in Orbitals

MCQ▾

Question

Any p-orbital can accommodate upto?

Choices

Choice (4) Response

a.

2 electrons with parallel spins

b.

6 electrons

c.

2 electrons with opposite spins

d.

4 electrons

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