NEET Physics: Questions 1240 - 1244 of 2142

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Question number: 1240

» Atoms and Nuclei » Hydrogen Spectrum

MCQ▾

Question

The energy of electron in the n th orbit of hydrogen atom is expressed as Equation wavelength of Lyman series will be

Choices

Choice (4) Response

a.

910 Å, 1213 Å

b.

1315 Å , 1530 Å

c.

5463 Å, 7858 Å

d.

None of the above

Question number: 1241

» Dual Nature of Matter and Radiation » De-Broglie Relation

MCQ▾

Question

One electron & one proton have equal energies then ratio of associated de-Broglie wavelength will be,

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 1242

» Atoms and Nuclei » Hydrogen Spectrum

MCQ▾

Question

In the following atoms and molecule for the transition from n = 2 to n = 1, the spectral line of minimum wavelength will be produced by,

Choices

Choice (4) Response

a.

Di-ionized lithium

b.

Hydrogen atom

c.

Uni-ionized helium

d.

Deuterium atom

Question number: 1243

» Thermodynamics » Laws of Thermodynamics » First Law of Thermodynamics

MCQ▾

Question

The latent heat of vaporization of water is 2240 J/gm. If the work done in the process of expansion of 1 g of water is 150 J, then increase in internal energy is

Choices

Choice (4) Response

a.

2408 J

b.

1904 J

c.

2072 J

d.

2090 J

Question number: 1244

» Atoms and Nuclei » Energy Levels

MCQ▾

Question

Energy levels A, B, C of a certain atom corresponding to increasing values of energy E A < E B < E C. If λ 1, λ 2, λ 3 are the wavelengths of radiations corresponding to the transitions C to B, B to A and C to A respectively, which of the following statements is correct?

 Energy Levels of certain atom

Energy Levels of Certain Atom

Energy levels A, B, C of a certain atom corresponding to increasing values of energy EA < EB < EC. λ1, λ2, λ3 are the wavelengths of radiations corresponding to the transitions C to B, B to A and C to A respectively.

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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