Explore topic-wise InterviewSolutions in Current Affairs.

Some statements about o- nitrophenol(A) & p - nitrophenol (B) are given below.
I. A has higher boiling point than B
II. B is more volatile than A
III. A can be purified by steam distillation IV. B is more soluble in water than A
The correct statements are

The best leaving group among the given options is:

1st Solution-300g of 25% w/w

2nd Solution-400g of 40% w/w

When both mixed, find the percentage of solute of final solution

Calcium carbonate reacts with aqueous HCl to give $CaC{l}_2$ and $C{O}_2$ according to the reaction given below

$CaC{O}_3\left(s\right)+2HCl\left(aq\right)⟶CaC{l}_2\left(aq\right)+C{O}_2\left(g\right)+H_{2}O\left(l\right)$

What mass of $CaC{l}_2$ will be formed when 250 mL of 0.76 M HCl reacts with 1000 g of $CaC{O}_3$ ? Name the limiting reagent. Calculate the number of moles of $CaC{l}_2$ formed in the reaction.

The density of a gas at ${27}^{0}C$ and 1 atm is d. Pressure remaining constant at what temperature will it's density becomes 0.75 d

Gastric juice contains 3.0g of $HCl$ per litre. If a person produces 2.44 litre of gastric juice per day. How many antacid tablets each containing 400 mg of $Al$($OH{)}_3$ are needed to neutralize all the $HCl$ produced in one day ?

The dissociation energy of $H_{2}is430.53kJmo{l}^{-1}.If{H}_2$ is dissociated by illumination with radiation of wavelength $253.7nm$, the fraction of the radiant energy which will be converted into kinetic energy is given by

The boiling point of methanol, water and dimethyl ether are respectively ${65}^{0}C,{100}^{0}Cand{34.5}^{0}C$. Which of the following best explains these wide variations in b.p.?

In the electrolysis method of $D_2$O, electrolyte used is

Tetrahedral complexes are generally high spin. This is because :

$H_{3}B{O}_3\stackrel{T_1}{⟶}\times \stackrel{T_2}{⟶}Y\stackrel{Redhot}{⟶}{B}_2{O}_3$

If $T_1$$<$$T_2$ then X and Y respectively are

Which of the following obeys Huckel Rule?

A piece of Mg ribbon is heated to redness in an atmosphere of Nitrogen and on cooling with water. The evolved gas is

Three footballs are filled with nitrogen, hydrogen and helium respectively. If the gases leak, then the ratio of the rate of leakage $(r_{N_2}:r_{H_2}:r_{He})$ from the three footballs (at the same time) is:

What is the exact value of $\pi$?

In the balanced chemical reaction $I{O}_3^{-}+a{I}^{-}+b{H}^{+}\to c{H}_{2}O+d{I}_{2}a,b,c,d\text{repectively correspond to}:$

Aniline behaves as a weak base. When $0.1M,50mL$ solution of aniline was mixed with $0.1M,25mL$ solution of $HCl$ the $pH$ of resulting solution was 8. The $pH$ of $0.01M$ solution of anilinium chloride will be:

Arrange the following in increasing order of their $p{K}_a$ value :

Assume that a particular amino acid has an isoelectric point of $6.0$. In a solution at $pH$ $1.0$, which of the following species will predominate?

In the following compound, the number of primary carbon atoms are:

$C{H}_3-\stackrel{C{H}_3}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}-\underset{C{H}_3}{\underset{|}{CH}}-C{H}_3$

Application of valence bond theory with examples

In $1\text{g}$ of a metal oxide, the amount of metal present is $0.68\text{g}$. What is the equivalent weight of the metal?

FeO is found with a composition of $F{e}_{0.95}$O. It ranges from $F{e}_{0.93}$O to Fe_0.95O. Which type of defect is it showing here?

Which is the most preferred metal in laboratory for preparation of hydrogen by metal-acid reaction:-

Hybridisation of carbon atom in $C{O}_3^{2-}$ is

Four solutions of $N{H}_{4}Cl$ are taken with concentrations $1M,0.1M,0.01Mand0.001M$. Their degree of hydrolysis are $h_1,h_2,h_3$ and $h_4$. What is the decreasing order of degree of hydrolysis ?

For a reaction $2A+B\to P,$ when concentration of B alone is doubled, $t_{\frac{1}{2}}$ does not change and when concentrations of both A and B is doubled, rate increases by a factor of 4. The unit of rate constant is,

Correct structure for tripeptide $\text{(gly-ala-gly)}$ from the following is:

At ntp 5.6 litres of a gas weighs 60 grams the vapour density of gas is

A 60

B 120

C 30

D 240

Which of the following carboxylic acids undergoes decarboxylation easily?

One calorie is the heat energy required to raise the temperature of 1g of water from _________.

[Assertion]:- All molecules with polar bond have non-zero dipole moments

[Reason]:- Dipole moment is a vector quantity

The mass of a mole of proton and electron is
A. 1.007g and 0.55 mg
B.$9.11\times {10}^{-28}kgand9.1\times {10}^{-28}kg$
C. 2gm and 2gm
D.$6.023\times {10}^{23}gand6.023\times {10}^{23}g$

Generally transition elements form coloured salts due to the presenece of unpaired electrons. Which of the following compounds will be coloured in its solid state?

Identify the reaction given below:

NaOH + $D_2$O $\to$ NaOD + HDO.

Which of the following compounds can not exist?

What is the mass per cent of carbon in carbon dioxide ?

(a) 0.034% (b) 27.27% (c) 3.4% (d) 28.7%

Identify the IUPAC name of this compound:

Consider the reaction
The final product D is -

The entgegen or $E$-isomer among the following is:

Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy?

When metal X is treated with sodium hydroxide, a white precipitate (A) is obtained, which is soluble in excess of NaOH to give soluble complex (B). Compound (A) is soluble in dilute HCl to form compound (C). The compound (A) when heated strongly gives (D), which is used to extract metal. Identify (X), (A), (B), (C) and (D). Write suitable equations to support their identities.