AIPMT 2014 | Structure of Atom Question 22 | Chemistry

AIPMT 2014

MCQ (Single Correct Answer)

-1

Calculate the energy in joule corresponding to light of wavelength 45 nm. (Planck,s constant, h = 6.63 $$ \times $$ 10^$$-$$34 J s, speed of light, c = 3 $$ \times $$ 10⁸ m s^$$-$$1)

6.67 $$ \times $$ 10¹⁵

6.67 $$ \times $$ 10¹¹

4.42 $$ \times $$ 10^$$-$$15

4.42 $$ \times $$ 10^$$-$$18

AIPMT 2014

MCQ (Single Correct Answer)

-1

Be²⁺ is isoelectronic with which of the following ions ?

H⁺

Li⁺

Na⁺

Mg²⁺

NEET 2013 (Karnataka)

MCQ (Single Correct Answer)

-1

The outer electronic configuration of Gd (At. No. 64) is

4f⁵ 5d⁴ 6s¹

4f⁷ 5d¹ 6s²

4f³ 5d⁵ 6s²

4f⁴ 5d⁵ 6s¹

NEET 2013 (Karnataka)

MCQ (Single Correct Answer)

-1

According to law of photochemical equivalence the energy absorbed (in ergs/mole) is given as (h = 6.62 $$ \times $$ 10^$$-$$27 ergs, c = 3 $$ \times $$ 10¹⁰ cm s^$$-$$1, N_A = 6.02 $$ \times $$ 10^$$-$$23 mol^$$-$$1)

$${{1.196 \times {{10}^8}} \over \lambda }$$

$${{2.859 \times {{10}^5}} \over \lambda }$$

$${{2.859 \times {{10}^{16}}} \over \lambda }$$

$${{1.196 \times {{10}^{16}}} \over \lambda }$$

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