Explore topic-wise InterviewSolutions in Current Affairs.

Calculate the mass of $KBr$ (in g) that needs to be added to 1 litre of a $0.05M$ solution of $AgN{O}_3$ so that the precipitation of $AgBr$ just starts.
Solubility product $\left(K_{sp}\right)$ of $AgBr$ is $3.5\times {10}^{-13}$.
Take molecular mass of $KBr$ to be $119gmo{l}^{-1}$

Consider the structure of rock salt. How many Na+ ions occupy the second nearest neighbour location of an Na+ ion?

Among the following which is most stable:



Choose the correct code:

When Prop-1-ene is treated with HCl in the presence of peroxide we get:

Ferrous oxide has a cubic structure and the edge length of its unit cell is $5.0A^{\circ }$. Assuming the density of ferrous oxide to be $3.84{\text{g/cm}}^3$ , the number of $F{e}^{2+}$ and $O^{2-}$ ions present in each unit cell should be:
$(\text{use}{N}_A=6\times {10}^{23})$:

For azimuthal quantum number $l=3$, the maximum number of electrons will be:

Anti-Markovnikov’s addition of $HBr$ is not observed in:

Read the following question and answer as per the direction given below:
Statement 1: In any ionic solid [MX] with Schottky defect, the number of positive and negative ions are same.
Statement 2: An equal number of cation and anion vacancies is present.

Explain why is sodium less reactive than potassium?

Which of the following reaction will not be favourable in the forward direction?

From the reactions shown, A, B and C respectively are:

Rank the following molecules in increasing order of relative rate of $S_{N}1$ solvolysis with methanol and heat

A particle of mass $M$ at rest decays into two particles of masses $m_1$ and $m_2$ having non-zero velocities. The ratio of the De-Broglie wavelengths of the particles ${\lambda }_1:{\lambda }_2$

PET is -

What is the correct order of boiling point?

An equimolar mixture of 'A' and 'B' is prepared. The total vapour pressure of this mixture as a function of mole fraction of B is found to be $P_T=300+600X_B$.



(i) Calculate the composition of vapour of this mixture (Assume that the number of moles going into the vapour phase is negligible in comparison to the number of moles present in the liquid phase).



(ii) If the vapours above the liquid in part (i) are collected and condensed into a new liquid, calculate the composition of vapours of this new liquid.

Which of the following is themally least stable ?

Molecular mass of glucose molecule (C₆H₁₂O₆) is:

A co-ordination complex has the formula $PtC{l}_4.2KCl$. Electrical conductance measurements indicate the presence of three ion in one formula unit. Treatment with $AgN{O}_3$ produces no precipitate of $AgCl$. What is the co-ordination number of Pt in this complex?