NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 821 - 826 of 1258

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Question number: 821

» Atomic Structure » Bohr Model of Hydrogen Atom

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MCQ▾

Question

What is the energy in required to excite the electron from state in hydrogen atom? (n- principal quantum number).

Choices

Choice (4) Response

a.

10.2

b.

3.4

c.

13.6

d.

17

Question number: 822

» Basic Concepts in Chemistry » Mole Concept

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MCQ▾

Question

In the reaction What will be the number of moles of product formed starting from one mole of A, 0.6 mole of B and mole of C?

Choices

Choice (4) Response

a.

2.32

b.

0.25

c.

0.3

d.

0.24

Question number: 823

» Hydrocarbons » Alkynes » Addition of Hydrogen, Halogens, Water and Hydrogen Halides

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Question

When sodium fumarate is electrolysed, which alkyne is formed at anode?

Choices

Choice (4) Response

a.

Butyne

b.

Propyne

c.

Ethyne

d.

All of the above

Question number: 824

» Hydrocarbons » Alkynes » Addition of Hydrogen, Halogens, Water and Hydrogen Halides

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MCQ▾

Question

On passing vinyl acetylene into conc. HCl in the presence of cuprous and ammonium chlorides, the following is produced-

Choices

Choice (4) Response

a.

Isoprene

b.

Neoprene

c.

Chloroprene

d.

Question does not provide sufficient data or is vague

Question number: 825

» Atomic Structure » Nature of Electromagnetic Radiation

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MCQ▾

Question

A 600 W mercury lamp emits monochromatic radiation of wavelength 331.3 nm. How many photons are emitted from the lamp per second?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 826

» Atomic Structure » Heisenberg Uncertainty Principle

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MCQ▾

Question

Calculate the uncertainity in the position of particle when the uncertainity in momentum is

Choices

Choice (4) Response

a.

b.

c.

d.