An organic compound $$'\mathrm{A}'$$ contains nitrogen and chlorine. It dissolves readily in water to give a solution that turns litmus red. Titration of compound $$'\mathrm{A}'$$ with standard base indicates that the molecular weight of $$'\mathrm{A}'$$ is $$131 \pm 2$$. When a sample of $$'\mathrm{A}'$$ is treated with aq. $$\mathrm{NaOH}$$, a liquid separates which contains $$\mathrm{N}$$ but not $$\mathrm{Cl}$$. Treatment of the obtained liquid with nitrous acid followed by phenol gives orange precipitate. The compound $$'\mathrm{A}'$$ is :
Answer
(D)
12
Match List - I with Match List - II.
List - I
List - II
(A)
Glucose + HI
(I)
Gluconic acid
(B)
Glucose + Br$$_2$$ water
(II)
Glucose pentacetate
(C)
Glucose + acetic anhydride
(III)
Saccharic acid
(D)
Glucose + HNO$$_3$$
(IV)
Hexane
Choose the correct answer from the options given below:
Answer
(A)
(A) - (IV), (B) - (I), (C) -(II), (D) - (III)
13
Match List - I with List - II.
List - I (Mixture)
List - II (Purification Process)
(A)
Chloroform & Aniline
(I)
Steam distillation
(B)
Benzoic acid & Napthalene
(II)
Sublimation
(C)
Water & Aniline
(III)
Distillation
(D)
Napthalene & Sodium chloride
(IV)
Crystallisation
Choose the correct answer from the options given below :
Answer
(D)
(A) - (III), (B) - (IV), (C) - (I), (D) - (II)
14
$$\mathrm{Fe}^{3+}$$ cation gives a prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of :
The normality of $$\mathrm{H}_{2} \mathrm{SO}_{4}$$ in the solution obtained on mixing $$100 \mathrm{~mL}$$ of $$0.1 \,\mathrm{M} \,\mathrm{H}_{2} \mathrm{SO}_{4}$$ with $$50 \mathrm{~mL}$$ of $$0.1 \,\mathrm{M}\, \mathrm{NaOH}$$ is _______________ $$\times 10^{-1} \mathrm{~N}$$. (Nearest Integer)
Answer
1
16
A gas (Molar mass = 280 $$\mathrm{~g} \mathrm{~mol}^{-1}$$) was burnt in excess $$\mathrm{O}_{2}$$ in a constant volume calorimeter and during combustion the temperature of calorimeter increased from $$298.0 \mathrm{~K}$$ to $$298.45$$ $$\mathrm{K}$$. If the heat capacity of calorimeter is $$2.5 \mathrm{~kJ} \mathrm{~K}^{-1}$$ and enthalpy of combustion of gas is $$9 \mathrm{~kJ} \mathrm{~mol}^{-1}$$ then amount of gas burnt is _____________ g. (Nearest Integer)
Answer
35
17
When a certain amount of solid A is dissolved in $$100 \mathrm{~g}$$ of water at $$25^{\circ} \mathrm{C}$$ to make a dilute solution, the vapour pressure of the solution is reduced to one-half of that of pure water. The vapour pressure of pure water is $$23.76 \,\mathrm{mmHg}$$. The number of moles of solute A added is _____________. (Nearest Integer)
If formation of compound $$[\mathrm{B}]$$ follows the first order of kinetics and after 70 minutes the concentration of $$[\mathrm{A}]$$ was found to be half of its initial concentration. Then the rate constant of the reaction is $$x \times 10^{-6} \mathrm{~s}^{-1}$$. The value of $$x$$ is ______________. (Nearest Integer)
Answer
165
19
The number of molecule(s) or ion(s) from the following having non-planar structure is ____________.
The spin only magnetic moment of the complex present in Fehling's reagent is __________ B.M. (Nearest integer).
Answer
2
21
In the above reaction, $$5 \mathrm{~g}$$ of toluene is converted into benzaldehyde with $$92 \%$$ yield. The amount of benzaldehyde produced is ______________ $$\times 10^{-2} \mathrm{~g}$$. (Nearest integer)