Explore topic-wise InterviewSolutions in Current Affairs.

Calculate the degree of hydrolysis ammonium acetate. Given $K_a$ = $1.75\times {10}^{-5}$ ; $K_b$ = $1.80\times {10}^{-5}$.

A hydrocarbon on ozonolysis gives two moles of acetone. The type of hybridization that carbons undergoes in that hydrocarbon are

IN the Solvay process, can we obtain sodium carbonate directly by treating the solution containing $(N{H}_4{)}_{2}C{O}_3$ with sodium chloride? Explain.

The process requiring absorption of energy is

The monomer of the polymer

Lucas test of alcohols involves the following reaction $R-OH+Conc.HCl\underset{ZnC{l}_2}{\overset{Anhydrous}{\to }}RCl+H_{2}O$ (white turbidity) Select the incorrect statements for the lucas test

Twenty moles of sodium chloride are placed in beaker A and 5 moles of sodium chloride are placed in beaker B. The solution in which beaker will show a greater increase in boiling point and decrease in freezing point?

The order of basic strength among the following amines in benzene solution is

[AIIMS 1991; RPMT 2002]

For the processes $K^{+}\left(g\right)\stackrel{I}{⟶}K\left(g\right)\stackrel{II}{⟶}{K}^{-}\left(g\right)$

$WhenC{H}_2=CH-COOHisreducedbyLiAI{H}_4,thecompoundobtainedis:$

Calculate entropy change for vaporization of 1 mole of liquid water to steam at ${100}^{\circ }C$ if $\Delta H_v$=40.8 kJ $mo{l}^{-1}$.

Diborane forms adduct with

The rate constant of the reaction $A\to B$ is $0.6\times {10}^{-3}$ mole per second. If the concentration of B after 20 min is:

If acetamide is treated with the following reagents separately, which one of these would yield methylamine?

When But-2-yne reacts with HBr ,it gives:

On the basis of molecular orbital theory, pick out a molecule from the following that does not exist:

During nitration of benzene, the active nitrating agent is:

Question 26

What is the difference between molality and molarity ?

Which of the following do/does not fall under a single homologous series?

Leaching is a process of

Correct sequence of energy levels in N${}_2$ molecule

Cyclohexene on reductive ozonolysis gives compound $E$. Compound $E$ on further treatment with aqueous $KOH/\Delta$ yields compound $F$. Compound $F$ is:

When benzene is treated with excess of $C{l}_2$ in the presence of hν or light, the end product is

The mixture of ethanol and propanal are subjected to aldol condensation, the product can not be

The oxidation number of sulphur in $H_2{S}_2{O}_7$ and iron in$K_{4}Fe(CN{)}_6$ is respectively

What is the oxidation number of carbon in $C{O}_2$?

An atom which has lost one electron would be

How does the graph (concentration vs time) of a zero order reaction look like?

The oxidation state of the $C$ atom in $HCN$ molecule is

Total number of moles for the reaction $2HI\leftrightharpoons H_2+I_2$ if $\alpha$ is degree of

dissociation is

Two unknown compounds X and Y, both having mol. Formula $C_4{H}_{8}O$, give following results with four chemical tests.
$\begin{array}{ccccc}& Bromine& Nametal& Chromicacid& Lucasreagent\\ CompoundX& Decolorizes& Bubbles& Orangetogreen& Noreaction\\ CompoundY& Noreaction& Noreaction& Noreaction& Noreaction\end{array}$
Compound X will be:

Let f be a positive function. Let
$I_1={\int }_{1-k}^{k}xf\left\{x\right(1-x\left)\right\}dx,I_2={\int }_{1-k}^{k}f\left\{x\right(1-x\left)\right\}dx$
$when2k-1>0.Then\frac{I_1}{I_2}is$ [IIT 1997 Cancelled]

In this sequence, incorrect statement is

Which of the following represent physical adsorption?

What is the mass of the precipitate formed when $50\text{mL}$ of $16.9\%$ solution of $AgN{O}_3$ is mixed with $50\text{mL}$ of $5.8\%$ $NaCl$ solution ? $(Ag=107.8,N=14,O=16,Na=23,Cl=35.5)$

The gold numbers of protective colloids A, B, C and D are 0.04, 0.004, 10 and 40 respectively. The protective powers of A, B, C and D are in the order:

The correct structure of tribromooctaoxide is:

Question 21
On the basis of information given below mark the correct option.
Information
(i) In bromoethane and chloroethane mixture intermolecular interactions of A-A and B-B type are nearly same as A-B type interactions.
(ii) In ethanol and acetone mixture A-A or B-B type intermolecular interactions are stronger than A-B type interactions.
(iii) In chloroform and acetone mixture A-A or B-B type intermolecular interactions are weaker than A-B type interactions.
(a) Solution (ii) and (iii) will follow Raoult's law
(b) Solution (i) will follow Raoult's law
(c) Solution (ii) will show negative deviation from Raoult's law
(d) Solution (iii) will show positive deviation from Raoult's law

Question 25

Which of the following orbitals are degenerate ?

$3d_{xy},4d_{xy},3d_{yz},4d_{yz},4d_{z^2}$

Which of the following statements are wrong about Galvanic cells?

Show that in a cubic packed structure, eight tetrahedral voids are present per unit cell.

What is the equilibrium concentration of each of the substances in the equilibrium when the initial concentration of ICl was 0.78 M?
$2IC{l}_{\left(g\right)}\leftrightarrow l_{2\left(g\right)}+C{l}_{2\left(g\right)};K_c=0.14$

A sample of pure $PC{l}_5$ was introduced into an evacuated vessel at 473 K. After equilibrium was attained, concentration of PCl_5 was found to be $0.5\times {10}^{-1}mol{L}^{-1}.Ifvalueof{K}_{c}is8.3\times {10}^{-3}$, what are the concentrations of $PC{l}_3$ and $C{l}_2$ at equilibrium?\\
$PC{l}_5\left(g\right)\leftrightarrow PC{l}_3\left(g\right)+C{l}_2\left(g\right)$

Explain the following reactions

(a)Silicon is heated with methyl chloride at high temperature in the presence of copper;

(b)Silicon dioxide is treated with hydrogen fluoride;

(c) CO is heated with ZnO;

(d)Hydrated alumina is treated with aqueous NaOH solution.