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Which of the following compounds is likely to show both Frenkel and Schottky defects in its crystalline form?

a. ZnSb. CsClc. KBrd. AgBrSolution:The radius ratio for AgBr is intermediate. Thus, it shows both Frenkel and Schottky defects.Answer: d... View Article

Consider the following plots of rate constant versus 1/ for four different reactions.

Consider the following plots of rate constant versus 1/ for four different reactions. Which of the following orders is correct for the... View Article

Hydrogen has three isotopes (A), (B) and (C). If the number of neutron(s) in (A), (B) and (C) respectively, are (x), (y) and (z), the sum of (x), (y) and (z) is:

a. 4b. 1c. 3d. 2Solution:Number of neutrons in protium = 0Number of neutrons in deuterium = 1Number of neutrons in tritium = 2So, total number of... View Article

The correct order of the calculated spin-only magnetic moments of complexes A to D is:

The correct order of the calculated spin-only magnetic moments of complexes A to D is: A. i( )4B. [ ( 2 )6]2+C. 2[ ( )4]D. 2( ℎ3)2 a. (C)... View Article

A metal (A) on heating in nitrogen gas gives compound B….

A metal (A) on heating in nitrogen gas gives compound B. B on treatment with H2O gives a colourless gas which when passed through 4 solution... View Article

The radius of second Bohr orbit, in terms of the Bohr radius, ₀ , in Li²⁺ is:

a. 2a0/3b. 4a0/9c. 4a0/3d. 2a0/9Solution:The formula for Bohr’s radius for any one electron species is: r = a0n2/ zfor Li2+: r = a022/3= 4a0/3Answer: c... View Article

Arrange the following bonds according to their average bond energies in descending order: C-Cl, C-Br, C-F, C-I

a. C-Cl > C-Br > C-I > C-Fb. C-Br>C-I>C-Cl>C-Fc. C-I>C-Br>C-Cl>C-Fd. C-F>C-Cl>C-Br>C-ISolution:In C − F there... View Article

The series combination of two batteries both of the same emf 10 , but different internal resistance of 20 Ω and 5 Ω , is connected to the parallel combination of two resistors 30 Ω and Ω. The voltage difference across the battery of internal resistance 20 Ω is zero, the value of (in Ω) is

Solution: If 1 and 2 are terminal voltage across the two batteries. 1 = 0 1 = 1 − . 10 = 10 − × 20 = 0.5 2 = 10... View Article

An asteroid is moving directly towards the centre of the earth. When at a distance of 10R (R is the radius of the earth) from the earth

An asteroid is moving directly towards the centre of the earth. When at a distance of 10R (R is the radius of the earth) from the earth’s... View Article

Three containers ₁, ₂ and ₃ have water at different temperatures.

Three containers 1, 2 and 3 have water at different temperatures. The table below shows the final temperature T when different amounts of... View Article

A plane electromagnetic wave of frequency 25 GHz is propagating in vacuum along the zdirection. At a particular point in space and time

A plane electromagnetic wave of frequency 25 GHz is propagating in vacuum along the z-direction. At a particular point in space and time, the... View Article

The first member of Balmer series of hydrogen atom has a wavelength of 6561 Å. The wavelength of the second member of the Balmer series (in nm) is

Solution: ....i ....ii... View Article

M	T	W	T	F	S	S
	1	2	3	4	5	6
7	8	9	10	11	12	13
14	15	16	17	18	19	20
21	22	23	24	25	26	27
28	29	30

Archives

Which of the following compounds is likely to show both Frenkel and Schottky defects in its crystalline form?

Consider the following plots of rate constant versus 1/ for four different reactions.

Hydrogen has three isotopes (A), (B) and (C). If the number of neutron(s) in (A), (B) and (C) respectively, are (x), (y) and (z), the sum of (x), (y) and (z) is:

The correct order of the calculated spin-only magnetic moments of complexes A to D is:

A metal (A) on heating in nitrogen gas gives compound B….

The radius of second Bohr orbit, in terms of the Bohr radius, ₀ , in Li²⁺ is:

Arrange the following bonds according to their average bond energies in descending order: C-Cl, C-Br, C-F, C-I

The series combination of two batteries both of the same emf 10 , but different internal resistance of 20 Ω and 5 Ω , is connected to the parallel combination of two resistors 30 Ω and Ω. The voltage difference across the battery of internal resistance 20 Ω is zero, the value of (in Ω) is

An asteroid is moving directly towards the centre of the earth. When at a distance of 10R (R is the radius of the earth) from the earth

Three containers ₁, ₂ and ₃ have water at different temperatures.

A plane electromagnetic wave of frequency 25 GHz is propagating in vacuum along the zdirection. At a particular point in space and time

The first member of Balmer series of hydrogen atom has a wavelength of 6561 Å. The wavelength of the second member of the Balmer series (in nm) is

Two identical cylindrical vessels are kept on the ground and each contain the same liquid of density d.

The value of current i₁ flowing from A to C

Find the Binding energy per nucleon

A capacitor C is fully charged with voltage V₀.

A particle of charge q and mass m is subjected to an electric field E

A body is moving in a low circular orbit about a planet of mass M and radius R.

A paramagnetic sample shows a net magnetisation of 6 A/m

A cube of metal is subjected to a hydrostatic pressure of 4 GPa.

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