IIT-JEE 2008 Paper 1 Offline | Structure of Atom Question 23 | Chemistry

IIT-JEE 2008 Paper 1 Offline

MCQ (Single Correct Answer)

-1

STATEMENT - 1 : The plot of atomic number (y-axis) versus number of neutrons (x-axis) for stable nuclei shows a curvature towards x-axis from the line of 45^o slope as the atomic number is increased.

STATEMENT - 2 : Proton-proton electrostatic repulsions begin to overcome attractive forces involving protons and neutrons in heavier nuclides

Statement - 1 is True, Statement - 2 is True; Statement - 2 is a correct explanation for Statement - 1

Statement - 1 is True, Statement - 2 is True; Statement - 2 is NOT a correct explanation for Statement - 1

Statement - 1 is true, Statement - 2 is False

Statement - 1 is False, Statement - 2 is True

IIT-JEE 2006

MCQ (Single Correct Answer)

-1.5

According to Bohr's theory
E_n = Total energy, K_n = Kinetic Energy, V_n = Potential Energy, r_n = Radius of n^th orbit
Match the following

Column I

(A) V_n/K_n = ?
(B) If radius of n^th orbit $$ \propto E_n^x,x = ?$$
(C) Angular momentum in lowest orbital
(D) $${1 \over {{r_n}}} \propto {Z^y},y = ?$$

Column II

(p) 0
(q) -1
(r) -2
(s) 1

(A) $$\to$$ r, (B) $$\to$$ p, (C) $$\to$$ q, (D) $$\to$$ s

(A) $$\to$$ r, (B) $$\to$$ q, (C) $$\to$$ p, (D) $$\to$$ s

(A) $$\to$$ s, (B) $$\to$$ p, (C) $$\to$$ q, (D) $$\to$$ r

(A) $$\to$$ p, (B) $$\to$$ r, (C) $$\to$$ q, (D) $$\to$$ s

IIT-JEE 2005 Screening

MCQ (Single Correct Answer)

-0.25

The number of radial nodes of 3s and 2p orbitals are respectively

2, 0

0, 2

1, 2

2, 1