﻿ As per de-Broglie s formula a macroscopic particle of mass 100 g and moving at a velocity of 100 cm s-1 will have a wavelength of from Chemistry NEET Year 2014 Free Solved Previous Year Papers

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# NEET Chemistry Solved Question Paper 2014

#### Multiple Choice Questions

1.

The emission spectrum of hydrogen discovered first and the region of the electromagnetic spectrum in which it belongs, respectively are

• Lyman, ultraviolet

• Lyman, visible

• Balmer, ultraviolet

• Balmer, visible

# 2.As per de-Broglie's formula a macroscopic particle of mass 100 g and moving at a velocity of 100 cm s-1 will have a wavelength of6.6 × 10-29 cm 6.6 × 10-30 cm 6.6 × 10-31 cm 6.6 × 10-32 cm

C.

6.6 × 10-31 cm

According to de-Broglie wavelength, λ = $\frac{\mathrm{h}}{\mathrm{mv}}$

Given, m = 100 gm; v = 100 cm s-1

h = 6.6 × 10-34 J-s = 6.6 × 10-27 erg-s

On substituting values, we get

λ =

3.

For one mole of an ideal gas,the slope of V vs T curve at constant pressure of 2 atm is X L mol-1 K-1.The value of the ideal universal gas constant 'R' in terms of X is

• X L atm mol-1 K-1

• $\frac{\mathrm{X}}{2}$L atm mol-1 K-1

• 2X L atm mol-1 K-1

• 2 X atm L-1 mol-1 K-1

4.

At a certain temperature the time required for the complete diffusion of 200-mL of H2 gas is 30 min. The time required for the complete diffusion of 50 mL of O2 gas at the same temperature will be

• 60 min

• 30 min

• 45 min

• 15 min

5.

The correct order of decreasing H-C-H angle in the following molecule is

• I > II > III

• II > I > III

• III > II > I

• I > III > II

6.

During the emission of a positron from a nucleus, the mass number of the daughter element remains the same but the atomic number

• is decreased by 1 unit

• is decreased by 2 units·

• is increased by 1 unit

• remains unchanged

7.

β- emission is always accompained by

• formation of antineutrino and α-particle

• emission of α-particle and γ-ray

• formation of antineutrino and γ-ray

• formation of antineutrino and positron

8.

Four gases P, Q, R and S have almost same values of 'b' but their 'a' values (a, b are van der Waals' constants) are in the order Q < R < S < P. At a particular temperature, among the four gases, the most easily liquefiable one is

• P

• Q

• R

• S

9.

The compound that will have a permanent dipole moment among the following is

• I

• II

• III

• IV

10.

The correct order of decreasing length of the bond as indicated by the arrow in the following structures is

• I > II > III

• II > I > III

• III > II > I

• I > III > II