AIEEE 2010 | Structure of Atom Question 143 | Chemistry

The energy required to break one mole of Cl–Cl bonds in Cl₂ is 242 kJ mol^–1. The longest wavelength of light capable of breaking a single Cl – Cl bond is
(c = 3 x 10⁸ ms^–1 and N_A = 6.02 x 10²³ mol^–1)

594 nm

640 nm

700 nm

494 nm

AIEEE 2010

MCQ (Single Correct Answer)

-1

Ionisation energy of He⁺ is 19.6 x 10^–18 J atom^–1. The energy of the first stationary state (n = 1) of Li²⁺ is

4.41 x 10^–16 J atom^–1

-4.41 x 10^–17 J atom^–1

-2.2 x 10^–15 J atom^–1

8.82 x 10^–17 J atom^–1

AIEEE 2009

MCQ (Single Correct Answer)

-1

Calculate the wavelength (in nanometer) associated with a proton moving at 1.0 x 10³ ms⁻¹ (Mass of proton = 1.67 $$\times$$ 10^-27 kg and h = 6.63 $$\times$$ 10^-34 Js) :

0.40 nm

2.5 nm

14.0 nm

0.32 nm

AIEEE 2009

MCQ (Single Correct Answer)

-1

In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005%. Certainity with which the position of the electron can be located is (h = 6.6 $$\times$$ 10^-34 kg m²s^-1, mass of electron, e_m = 9.1 $$\times$$ 10^-31 kg)

5.10 $$\times$$ 10^-3 m

1.92 $$\times$$ 10^-3 m

3.84 $$\times$$ 10^-3 m

1.52 $$\times$$ 10^-4 m

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