AIEEE 2006 | Structure of Atom Question 161 | Chemistry

Uncertainty in the position of an electron (mass = 9.1 $$\times$$ 10^-31 kg) moving with a velocity 300 ms^-1, accurate upto 0.001% will be (h = 6.63 $$\times$$ 10^-34 Js)

1.92 $$\times$$ 10^-2 m

3.84 $$\times$$ 10^-2 m

19.2 $$\times$$ 10^-2 m

5.76 $$\times$$ 10^-2 m

AIEEE 2006

MCQ (Single Correct Answer)

-1

Which of the following sets of ions represents a collection of isoelectronic species?

N^3-, O^2-, F^-, S^2-

Li⁺, Na⁺, Mg²⁺, Ca²⁺

K⁺, Cl^-, Ca²⁺, Sc³⁺

Ba²⁺, Sr²⁺, K⁺, Ca²⁺

AIEEE 2005

MCQ (Single Correct Answer)

-1

Of the following sets which one does NOT contain isoelectronic species?

$$BO_3^{3 - }$$, $$CO_3^{2 - }$$, $$NO_3^{- }$$

$$SO_3^{2 - }$$, $$CO_3^{2 - }$$, $$NO_3^{-}$$

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

$$PO_4^{3 - }$$, $$SO_4^{2 - }$$, $$ClO_4^{ - }$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

In a multi-electron atom, which of the following orbitals described by the three quantum members will have the same energy in the absence of magnetic and electric fields?
(A) n = 1, l = 0, m = 0
(B) n = 2, l = 0, m = 0
(C) n = 2, l = 1, m = 1
(D) n = 3, l = 2, m = 1
(E) n = 3, l = 2, m = 0

(D) and (E)

(B) and (C)

(A) and (B)

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