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Structure of Atom · Question 35

NEET 2013 (Karnataka)MCQMedium📈 Topic in 12% papers+4−1
1

According to law of photochemical equivalence the energy absorbed (in ergs/mole) is given as (h = 6.62 10-27 ergs, c = 3 1010 cm s-1, NA = 6.02 1023 mol-1)

  1. 1.196 108
  2. 2.859 105
  3. 2.859 1016
  4. 1.196 1016

Answer

(1) 1.196 108

Solution

By the law of photochemical equivalence, one mole of molecules absorbs one mole of photons (one einstein).

E = NA h = NA h c

= 6.02 1023 6.62 10-27 3 1010

= 1.196 108 erg mol-1 (λ in cm)

Answer: (1)

NEET 2013 (Karnataka)

Keep practising — Structure of Atom

2

The orbital angular momentum of a p-electron is given as

  1. h 2
  2. 3 h2
  3. 32 h
  4. 6 h2
AIPMT 2012 (Mains)
3

Maximum number of electrons in a subshell with l = 3 and n = 4 is

  1. 14
  2. 16
  3. 10
  4. 12
AIPMT 2012 (Prelims)
4

The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is

  1. 5, 1, 1, + 12
  2. 6, 0, 0, + 12
  3. 5, 0, 0, + 12
  4. 5, 1, 0, + 12
AIPMT 2012 (Prelims)
5

According to the Bohr theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon ?

  1. n = 6 to n = 1
  2. n = 5 to n = 4
  3. n = 6 to n = 5
  4. n = 5 to n = 3
AIPMT 2011 (Mains)
6

The total number of atomic orbitals in fourth energy level of an atom is

  1. 8
  2. 16
  3. 32
  4. 4
AIPMT 2011 (Prelims)
7

The energies E1 and E2 of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths i.e., 1 and 2 will be

  1. 1 = 2
  2. 1 = 2 2
  3. 1 = 4 2
  4. 1 = 12 2
AIPMT 2011 (Prelims)
8

If n = 6, the correct sequence for filling of electrons will be

  1. ns (n-2)f (n-1)d np
  2. ns (n-1)d (n-2)f np
  3. ns (n-2)f np (n-1)d
  4. ns np (n-1)d (n-2)f
AIPMT 2011 (Prelims)
9

A 0.66 kg ball is moving with a speed of 100 m/s. The associated wavelength will be (h = 6.6 10-34 J s)

  1. 6.6 10-32 m
  2. 6.6 10-34 m
  3. 1.0 10-35 m
  4. 1.0 10-32 m
AIPMT 2010 (Mains)
10

Maximum number of electrons in a subshell of an atom is determined by the following

  1. 2 + 1
  2. 4 - 2
  3. 2n2
  4. 4 + 2
AIPMT 2009
11

Which of the following is not permissible arrangement of electrons in an atom ?

  1. n = 5, = 3, m = 0, s = +1/2
  2. n = 3, = 2, m = -3, s = -1/2
  3. n = 3, = 2, m = -2, s = -1/2
  4. n = 4, = 0, m = 0, s = -1/2
AIPMT 2009

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