Explore topic-wise InterviewSolutions in Current Affairs.

Which of
the following are isoelectronic species i.e., those having the same
number of electrons?

Na⁺,
K⁺, Mg²⁺, Ca²⁺, S^2–,
Ar

The option(s) with only amphoteric oxides is (are)

Indicate the complex ion which shows geometrical isomerism.
(a) $\left[Cr\right(H_{2}O{)}_{4}C{l}_2{]}^{+}$
(b) $\left[Pt\right(N{H}_3{)}_{3}Cl]$
(c) $\left[Co\right(N{H}_3{)}_6{]}^{3+}$
(d) $\left[Co\right(CN{)}_5\left(NC\right){]}^{3-}$

Amongst $N{O}_3^{-},AS{O}_3^{3_{-}},C{O}_3^{2_{-}},Cl{O}_3^{-},S{O}_3^{2_{-}},\text{and}B{O}_3^{2_{-}}$, the non-planar species are:

Calculate
the entropy change in surroundings when 1.00 mol of H₂O_(l)
is formed under standard conditions. Δ_fH^θ
= –286 kJ mol^–1.

When the following five anions are arranged in order of decreasing ionic radius, the correct sequence will be:

Which of the following carbocation is the least stable ?

Sulphur has highest oxidation state in

Match the anionic species given in Column I that are present in the ore(s) given in Column II.

$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{(A) Carbonate}& \text{(P) Siderite}\\ \text{(B) Sulphide}& \text{(Q) Malachite}\\ \text{(C) Hydroxide}& \text{(R) Bauxite}\\ \text{(D) Oxide}& \text{(S) Calamine}\\ & \text{(T) Argentite}\end{array}$

Which is the correct electronic configuration of the element Mendelevium (Md)?

A compound AB crystallizes in bcc lattice with unit cell edge length of 480 pm. If radius of B- is 225 pm then radius of A+ is

1. 
   

   Why Stretching of a rubber band is a reversible change?

   
   


2. 
   

   Why grinding of grain is an irreversible change?

   
   

In which one of the following equilibria, $K_P\ne K_C?$

Mixing of 0.1 mol of NaOH and 0.1 mol of acetic acid in one litre of water results into

What will be the correct order for the wavelengths of absorption
in the visible region for the following:

[Ni(NO₂)₆]⁴⁻, [Ni(NH₃)₆]²⁺,
[Ni(H₂O)₆]²⁺

is an example for natural adhesive.

For a reaction, $2A+B\to 3Z$, if the rate of consumption of $A$ is $2\times {10}^{-4}{\text{mol dm}}^{-3}{\text{s}}^{-1}$ the rate of formation of $Z$ $\left({\text{in mol dm}}^{-3}{\text{s}}^{-1}\right)$ will be:

Mole fraction of ethyl chloride and methanol in a ternary solution is 0.6 and 0.32 respectively. What is the mole fraction of third component. Also identify the solvent in this ternary solution.

Neoprene, a synthetic rubber contains which of the following elements besides C and H

The orbital diagram in which both the Pauli’s exclusion principle and Hund’s rule are violated is:

A bulb of unknown volume ${}^{\prime }{V}^{\prime }$ contains an ideal gas at $1atm$ pressure. This bulb was connected to another evacuated bulb of volume $0.5L$ through a stopcock. When stopcock was opened, the pressure at each bulb became $530mmofHg$ while the temperature remained constant. Find $V$ in Litres.

An element has a body centred cubic (bcc) structure with a cell edge of 288 pm. The atomic radius is

Which of the following represents analgesics?

The bond length of HCl bond is $2.29\times {10}^{-10}m$ . The percentage ionic character of HCl, if measured dipole moment is $6.226\times {10}^{-30}C.m$ is

In which of the following reaction reactants are matched with their major products?