IIT-JEE 2008 Paper 1 Offline | Structure of Atom Question 26 | 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 2007 Paper 2 Offline

MCQ (Single Correct Answer)

-1

A positron is emitted from $$_{11}^{23}$$Na The ratio of the atomic mass and atomic number of the resulting nuclide is :

$$\frac{22}{10}$$

$$\frac{22}{11}$$

$$\frac{23}{10}$$

$$\frac{23}{12}$$

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		Column II
(A)	$$\frac{V_n}{K_n} = ?$$	(P)	0
(B)	If radius of $$n^{\text{th}}$$ orbit $$\propto E_n^x$$, $$x = ?$$	(Q)	−1
(C)	Angular momentum in lowest orbital	(R)	−2
(D)	$$\frac{1}{r_n} \propto Z^y = ?$$	(S)	1

(A) $$\to$$ R, (B) $$\to$$ Pp, (C) $$\to$$ Qq, (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

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