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Among (a) – (d), the complexes that can display geometrical isomerism are:

A. [Pt(NH3)3Cl]+ B. [Pt(NH3)Cl5] C. [Pt(NH3)2Cl(NO2)] D. [Pt(NH3)4ClBr] 2+ a. A and B b. D and A c. C and... View Article

The increasing order of the atomic radii of the following elements is:

A. C B. O C. F D. Cl E. Br a. B<C<D<A<E b. C<B<A<D<E c. A<B<C<D<E d. D<C<B<A<E l Solution:... View Article

Among the reactions (a) – (d), the reaction(s) that does/do not occur in the blast furnace during the extraction of iron is/are:

A. CaO + SiO2→ CaSiO3 B. 3Fe2O3 + CO → 2Fe3O4 + CO2 C. FeO +SiO2 →FeSiO3 D. FeO →... View Article

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

a. ZnS b. CsCl c. KBr d. AgBr Solution: The radius ratio for AgBr is intermediate. Thus, it shows both... 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... 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. 4 b. 1 c. 3 d. 2 Solution: Number of neutrons in protium = 0 Number of neutrons in... 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( )4 B. [... 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... View Article

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

a. 2a0/3 b. 4a0/9 c. 4a0/3 d. 2a0/9 Solution: The formula for Bohr’s radius for any one electron species is:... 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-F b. C-Br>C-I>C-Cl>C-F c. C-I>C-Br>C-Cl>C-F d. C-F>C-Cl>C-Br>C-I Solution: 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 − .... 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... 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... 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... 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: \(\begin{array}{l}\Delta E = \frac{hC}{\lambda } = \Delta E_{o}\left [ \frac{1}{4} – \frac{1}{9} \right ]\end{array} \) ….i \(\begin{array}{l}So, \frac{hC}{\lambda’} =... View Article

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