Explore topic-wise InterviewSolutions in Current Affairs.

The reaction, $Sucrose\to Fructose+Glucose$, takes place at a certain temperature while the volume of the solution is maintained at 1 L. At t = 0, the initial rotation of the mixture is ${34}^{\circ }$. After 30 minutes the total rotation is ${19}^{\circ }$and after a very long time, the total rotation is $-{11}^{\circ }$. Find the time when solution was optically inactive.

What mass of glucose is required to produce $88\text{g}$ of $C{O}_2$ on complete combustion?

The percentage of nitrogen by mass in ammonium sulphate is closest to (atomic masses H = 1, N = 14, O = 16, S = 32)

Which is the most abundant gas in the atmosphere?

Which equation represents an example of Friedel-Craft's alkylation reaction ?

Which of the following would yield pentan-2-ol?

When condensation product of hexamethylene diammine and adipic acid is heated to 553k (80⁰C) in an atmosphere of nitrogen for about 4-5 hours, the product obtained is

An element A in a compound ABD has oxidation number A ^n-. It is oxidised by $C{r}_2{O}_7^{-2}$ in acidic medium. In the experiment 1.68$\times$${10}^{-3}$ x moles of$K_{2}C{r}_2{O}_7$ were used for 3.26$\times$${10}^{-3}$ moles of ABD. The new oxidation number of A after oxidation is:

Among the following, incorrect order is:

Explain the cleansing action of soaps.

$(C{H}_3{)}_{3}C-\stackrel{\stackrel{O}{||}}{C}-N{H}_2\underset{\left(ii\right)D_{2}O}{\overset{\left(i\right)O{D}^{-}/B{r}_2}{\to }}$ Product P is

Why is the boiling point of water much higher than that of Petroleum?

The process of converting alkyl halides into alcohols involves . . . . .
(a) addition reaction
(b) substitution reaction
(c) dehydrohalogenation reaction
(d) rearrangement reaction

When 22.4 L of C${}_4$H${}_8$ at STP is burnt completely, 89.6 L of CO${}_2$ gas at STP and 72 g of water are produced. The volume of the oxygen gas at STP consumed in the reaction is closest to :

Question 09
Which of the following aqueous solutions should have the highest boiling point?
(a) 1.0 M NaOH (b) $1.0MN{a}_{2}S{O}_4$
(C)$1.0MN{H}_{4}N{O}_3$ (d) $1.0MKN{O}_3$

Molarity is expressed as

Both gout and kidney stone formation is caused by:

Sucrose when dissolved in water

The apperance of colour in solid alkali metal halides is generally due to

Which one is most reactive towards nucleophilic addition reaction?

Compressibility factor $\left(Z\right)$ is plotted against pressure $\left(p\right)$ for four different gases $A,B,C$ & $D$. The correct order of critical temperature of the gases shown in the above graph is

Which of the following, are isoelectronic and isostructural ?

$N{O}_3^{-},C{O}_3^{2-},Cl{O}_3^{-},S{O}_3$

Calculate the wave number for the longest wavelength transition in the Balmer series of atomic hydrogen.

Of the given hydrides of group 16 Elements, which is the most stable thermodynamically?

What is lanthanoid contraction? What arc the consequences of lanthahoid contraction?

Consider the cyclic process $ABCA$ on a sample of $2.0\text{mol}$ of an ideal gas as shown in figure. The temperature of the gas at $\left(A\right)$ and $\left(B\right)$ are $300\text{K}$ and $500\text{K}$ respectively. A total of $1200\text{J}$ heat is withdrawn from the sample in the process. Find the work done by the gas in process $BC$. Take $R=8.3\text{J/mol –K}$

The order of -I power (-ve inductive effect ) of the following functional groups will be:

(i) $-S{O}_{3}H$

(ii) $-Cl$

(iii) $-N{H}_2$

(iv) $-H$

Predict major organic product from the following reaction.

The structure of the major product formed in the following reaction is

Accomplish the following conversions :

(i) Nitrobenzene to benzoic acid

(ii) Benzene to m-bromophenol

(iii) Benzoic acid to aniline

(iv) Aniline to 2,4,6-tribromofluorobenzene

(v) Benzyl chloride to 2-phenylethanamine

(vi) Chlorobenzene to p-chloroaniline

(vii) Aniline to p-bromoaniline

(viii) Benzamide to toluene

(ix) Aniline to benzyl alcohol.

The equilibrium, $S{O}_{2}C{l}_2\left(g\right)\rightleftharpoons S{O}_2\left(g\right)+C{l}_2\left(g\right)$ is attained at ${25}^{\circ }C$ in a closed container and an inert gas, helium, is introduced. Which of the following statements are correct?

A $20mL$ solution of hydrogen peroxide reacts quantitatively with a $20mL$ solution of $KMn{O}_4$ acidified with dilute $H_{2}S{O}_4.$ The same volume of the $KMn{O}_4$ solution is decolourized by $10mL$ of $MnS{O}_4$ in neutral medium simultaneously forming a dark brown precipitate of hydrated $Mn{O}_2.$ The brown precipitate is dissolved in $20mL$ of $0.2M$ sodium oxalate under boiling condition in the presence of dilute $H_{2}S{O}_4.$ Calculate the volume strength of $H_2{O}_2.$

If ${\Delta }_{\circ }$ > P (P = pairing energy; ${\Delta }_{\circ }$ change in energy of octahedral complexes), the correct electronic configuration for $d^4$ system will be

Which of the following will not react with $NaOH$ to form water?

For an acid indicator having the formula $HIn$ . Choose the correct options when the ratio $\frac{\left[I{n}^{-}\right]}{\left[HIn\right]}=10$

Cesium can be used for photoelectric cells not lithium. Why?

Find the concentration of $H^{+}$ ion that must be maintained in a saturated solution of $H_{2}S\left(0.1M\right)$ so as to precipitate $CdS$ not $ZnS$
Given: $\left[C{d}^{2+}\right]=\left[Z{n}^{2+}\right]=\left(0.1M\right)$ initially.
$K_{sp}\left(CdS\right)=8\times {10}^{-27}{K}_{sp}\left(ZnS\right)=1\times {10}^{-21}{K}_{sp}\left(H_{2}S\right)=1.1\times {10}^{-21}$

Give reasons :A) Frenkel defects are not found in alkly metal halides.

B) schottky deffect lower the density of related solides