Explore topic-wise InterviewSolutions in Current Affairs.

Boric acid is polymeric due to
(a) its acidic nature (b) the presence of hydrogen bonds
(c) its monobasic nature (d) its geometry

Amorphous boron is prepared by heating $B_2{O}_3$ with

What would be the SI unit for the quantity $\frac{P{V}^2{T}^2}{n}$ ?

Which of the following compound is not aromatic ?

Which of the following compound(s) can show geometrical isomerism?

If $N_A$ is Avogadro’s number, then the number of valence electrons in $4.2\text{g}$ of azide ions ($N_3^{-}$) are:

Total number of possible isomers for $\left[Cu\right(N{H}_3{)}_4\left]\right[PtC{l}_4]$ is:

In the crystalline state, $PC{l}_5$ shows which of the following hybridization/s?

Arrange the following in increasing order of their basic strength.
$C{H}_{3}CO{O}^{\ominus },FC{H}_{2}CO{O}^{\ominus },ClC{H}_{2}CO{O}^{\ominus },BrC{H}_{2}CO{O}^{\ominus }$

Assume ideal gas behaviour. For the reaction, $N_2{O}_5\left(g\right)\rightleftharpoons 2N{O}_2\left(g\right)+0.5O_2\left(g\right)$, the initial pressure is 600 mmHg and the pressure at any time is 960 mmHg. The fraction of $N_2{O}_5\left(g\right)$ decomposed at constant volume and temperature is:

Two closed bulbs of equal volume $\left(V\right)$ containing an ideal gas initially at pressure $P_i$ and temperature $T_1$ are connected through a narrow tube of negligible volume as shown in the figure below. The temperature of one of the bulbs is then raised to $T_2$. The final pressure $p_f$ is :

The order of ionisation energies of the coinage metals is:

The ratio between number of molecules in equal masses of CH₄ and SO₂ is?

Which of the following compounds was the starting material for the oxidation shown below?

Iodoethane reacts with sodium is the presence of dry ether. What is the product formed?

The number and type of bonds between two carbon atoms in $Ca{C}_2$ are

An organic compound contains 69.77% carbon, 11.63% hydrogen and rest oxygen. The molecular mass of the compound is 86. It does not reduce Tollen's reagent but forms an addition compound with sodium hydrogen sulphite and give positive iodoform test. On vigorous oxidation it gives ethanoic and propanoic acid. Write the possible sturcture of the compound.

How are xenon fluorides $Xe{F}_2,Xe{F}_4$ and $Xe{F}_6$ obtained?

What are the products of the following reaction?

The number of stereoisomers possible for a compound of the molecular formula CH₃—CH=CH—(CHCl)—Me is:

Which of the following is a free radical?

Why are halogens strong oxidizing agents ?

For the reaction $AB\left(g\right)\rightleftharpoons A\left(g\right)+B\left(g\right)$, AB is 33% dissociatated at a total pressure of P. Then

Sulphur dioxide can be used as:

The reaction in which hydrogen peroxide acts as a reducing agent is:

$N_2$ and $O_2$ are converted into monocations, $N_2^{+}$ and $O_2^{+}$ respectively. Which of the following is wrong ?

Write IUPAC name of​the conplex $\left[Cr\right(H_{2}O{)}_{5}Cl]C{l}_2$

Is H2O an ambidentate ligand or a unidentate ligand?

Stability order of following compounds is:

Nuclear binding energy is the energy released during the hypothetical formation of the nucleus by the condensation of individual nucleons. Thus, binding energy per nucleon =$\frac{\text{Total binding energy}}{\text{Number of nucleons}}$ For example, the mass of hydrogen atom is equal to the sum of the masses of a proton and an electron. For other atoms, the atomic mass is less than the sum of the masses of protons, neutrons and electrons present. This difference in mass, termed as mass defect, is a measure of the binding energy of protons and neutrons in the nucleus. The mass-energy relationship postulated by Einstein is expressed as: $\Delta E=\Delta m{c}^2$
Where $\Delta E$ is the energy liberated, $\Delta m$ is the loss of mass, and c is the speed of light.
In the reaction ${}_1^{2}H{+}_1^{3}H{\to }_2^{4}He{+}_0^{1}n$, if binding energies ${}_1^{2}H{,}_1^{3}H\text{and}{}_2^{4}He$ are respectively a, b and c (in MeV), then the energy released in this reaction is:

Which is strong hydrogen bond or vander waal force...?

Total number of neutrons present in 4gm of heavy water

How to determine mole fraction of solvent when moles of solute and solvent are given?

The most abundant elements by mass in the body of a healthy human adult are:
Oxygen (61.4%); Carbon (22.9%), Hydrogen (10.0%); and Nitrogen (2.6%). The weight which a 75 kg person would gain if all 1H atoms are replaced by 2H atoms is_______.

The total number of lone-pairs of electrons in melamine is _____

A solid ${}^{\prime }A{B}^{\prime }$ has a $NaCl$ structure where $B^{-}$ ions occupy the corners of the unit cell. If all the face centred atoms along one axis are removed then the resultant stoichiometry of the solid is:

Calculate the change in entropy for the following reaction
$2CO\left(g\right)+O_2\left(g\right)\to 2C{O}_2\left(g\right)$.
Given $S_{C{O}_2}^0=213.6J{K}^{-1}mo{l}^{-1}$,$S_{CO}^0=297.6J{K}^{-1}mo{l}^{-1}$ respectively.

The work function of a metal is 4.2 eV. If the radiation of 2000 Å falls on the metal, then kinetic energy of the fastest photoelectron is

The orbitals that are oriented along the axes among the following is: