CSIR Chemical Sciences: Questions 215 - 218 of 427

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Question number: 215

» Physical Chemistry » Principles of Quantum Mechanics » Orbital and Spin Angular Momenta

Appeared in Year: 2012

MCQ▾

Question

For hydrogen- like atom with a nuclear charge, 2 the energy of orbital with principal quantum number ‘n’ follows the relation. (June)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 216

» Physical Chemistry » Chemical Bonding in Diatomics » Huckel Theory for Conjugated Pi Electron Systems

Appeared in Year: 2012

MCQ▾

Question

Using Hacker molecular orbital approximation, the two roots of secular equation of ethene are: (June)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 217

» Inorganic Chemistry » Nuclear Chemistry » Fission and Fusion

Appeared in Year: 2011

MCQ▾

Question

For nuclear reactions: -

  1. Equation

  2. Equation

(Given masses: Equation and Equation )

Correct Statement is: - (Dec)

Choices

Choice (4) Response

a.

1 and 2 are both spontaneous fission process.

b.

2 is spontaneous fission but 1 is not

c.

1 is spontaneous but 2 is not

d.

1 and 2 are not spontaneous fission process.

Question number: 218

» Physical Chemistry » Chemical Kinetics » Collision and Transition State Theories of Rate Constants

Appeared in Year: 2013

MCQ▾

Question

A radioactive Equation initially decays at the rate of 34, 500 disintegrations/minute, but decay rate falls to 21, 500 disintegration/minute after 75 minutes. The Equation for Equation is, (June)

Choices

Choice (4) Response

a.

220 mins

b.

90 mins

c.

180 mins

d.

110 mins

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