AIEEE 2009 | Structure of Atom Question 155 | Chemistry

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

AIEEE 2008

MCQ (Single Correct Answer)

-1

Which one of the following constitutes a group of the isoelectronic species?

$$C_2^{2 - }$$, $$O_2^{-}$$, CO, NO

$$NO^{+}$$, $$C_2^{2 - }$$, CN^-, $$N_2$$

CN^-, $$N_2$$, $$O_2^{2-}$$, $$C_2^{2 - }$$

$$N_2$$, $$O_2^{-}$$, $$NO^{+}$$, CO

AIEEE 2008

MCQ (Single Correct Answer)

-1

The ionization enthalpy of hydrogen atom is 1.312 × 10⁶ J mol⁻¹. The energy required to excite the electron in the atom from n = 1 to n = 2 is

8.51 × 10⁵ J mol⁻¹

6.56 × 10⁵ J mol⁻¹

7.56 × 10⁵ J mol⁻¹

9.84 × 10⁵ J mol⁻¹

AIEEE 2007

MCQ (Single Correct Answer)

-1

Which of the following sets of quantum numbers represents the highest energy of an atom?

n = 3, l = 0, m = 0, s = +1/ 2

n = 3, l = 1, m = 1, s = +1/ 2

n = 3, l = 2, m = 1, s = +1/ 2

n = 4, l = 0, m = 0, s = +1/ 2

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