Explore topic-wise InterviewSolutions in Current Affairs.

$H$ joules of heat is required to increase the temperature of one mole of a monoatomic gas from ${20}^{\circ }C$ to ${30}^{\circ }C$ at constant volume. How much heat will be required to increase the temperature of 2 moles of a diatomic gas from ${20}^{\circ }C$ to ${25}^{\circ }C$ at constant volume?

Which of the following is true for carbocations?

Arrange the following in increasing base strength

$\underset{I}{C{H}_{3}OH}\underset{I}{\stackrel{\ominus }{C{H}_{3}C{O}_2}}\underset{II}{\stackrel{\ominus }{C{H}_{3}O}}\underset{III}{\stackrel{\ominus }{C{H}_{3}O}}\underset{IV}{\stackrel{\ominus }{OH}}$

When 20 g of naphthoic acid (C11H8O2) is dissolved in 50g of benzene (Kf = 1.72 K kg mol-1), a freezing point depression of 2K is observed. The van't Hoff factor (i) is -

The compound

forms nitroso amines when the substituents are

[Roorkee 1999]

How many space lattices are obtainable from the different crystal systems

[MP PMT 1996; MP PET/PMT 1998]

The anions (A) form hexagonal closest packing and cation (C) occupy only 2/3 of octahedral voids in it, then the general formula of the compound is

In a hydrogen atom, an electronic transition takes place from an initial state (1) to a final state (2). The difference in the orbit radius $(r_1-r_2)$ is 24 times the first Bohr radius. Identify the transition.

Arrange the decreasing order of their reactivity with alkanes.

Calculate the solubility of a sparingly soluble compund $A_2{X}_3$ at ${25}^{\circ }C$.
The solubility product $K_{sp}$ of $A_2{X}_3$ is $1.08\times {10}^{-23}$ at the given temperature.

A wave with a frequency of 30 Hz travels along a string at speed of 36 m/s and reflects off a free end. The distance of the first node from the end of the string is

Assertion and Reason
In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice..
(a) Assertion and reason both are correct statements but reason does not explain assertion.
(b) Assertion and reason both are correct and reason explains asssWon.
(c) Both assertion and reason are Wrong statements.
(d) Assertion is correct statement reason is wrong statement.
(e) Assertion is wrong statement reason is correct statement.

Assertion (A) Sulpha drug contain sulphonamide group.
Reason (R) Salvarsan is a sulpha drug.

Amorphous solids can also be called ..............

(a) Pseudo solids (b) true solids

(c) super cooled liquids (d) super cooled solids

The value of $E_{reduction}$ of a hydrogen electrode at $pH=0$ and $298K$, $1atm$ is:

The conductivity of 0.20M solution of KCl at 298K is 0.0248 S $c{m}^{-1}$. Calculate its molar conductivity ?

Which of the following substances do not lose their magnetic properties when external magnetic field is removed?

Ethene$\to$ Benzene; The sequence of reagents required for this conversion is

Bleaching powder and bleach solution are produced on a large scale and used in several household products. The effectiveness of bleach solution is often measured by iodometry.

Bleaching powder contains a salt of an oxoacid as one of its components. The anhydride of that oxoacid is

For the reactions (i) $H_2\left(g\right)+C{l}_2\left(g\right)⟶2HCl\left(g\right)+xKJ$
(ii) $H_2\left(g\right)+C{l}_2\left(g\right)⟶2HCl\left(l\right)+yKJ$


Which of the following statements is correct?

With which of the following reagents glucose does not react?
(correct answer +1, wrong answer -0.25)

The correct order of increasing bond angles in the following species is:

The composition of the common glass is

In the reaction, $8Al+3F{e}_3{O}_4\to 4A{l}_2{O}_3+9Fe$, the number of electrons transferred from reductant to oxidant is:

An example of $p\pi -p\pi$ bonding is:

The chemical reaction $2O_3\to 3O_2$ involves two elementary steps :
$O_3\stackrel{fast}{\to }{O}_2+O;O+O_3\stackrel{Slow}{\to }2O_2$
The differential rate law expression will be :

In aqueous solution, strong electrolytes

[AMU 1983, 84]

Amongst the following elements (whose electronic configuration are given below) the one having the highest ionization energy is-

The formula mass of the complex $CuS{O}_4.5H_{2}O$ in grams is $y\times {10}^{-22}$.
Value of $y$ is .
(given average atomic mass of $Cu$ = 63.5 u)

A gas is allowed to expand isothermally. The root mean square velocity of the molecules

Among the following which is an exchange reaction?

Question 05

Which of the following statements about the electron is incorrect ?

(a) It is negatively charged particle

(b) The mass of electron is equal to the mass of neutron

(c) It is a basic constituent of all atoms

(d) It is a constituent of cathode rays

The temperature at which a real gas obeys the ideal gas laws over a fairly wide range of pressure is _____.

A small quantity of gaseous $N{H}_3$ and HBr are introduced simultaneously into the opposite ends of an open tube that is 1m long. Calculate the distance of the white solid $N{H}_{4}Br$ formed from the end that was used to introduce $N{H}_3$.

In which of the following is the angle between the two covalent bonds greatest

Which of the following is the most dangerous metal pollutant of automobile exhaust?

Enthalpy of vaporisation of a liquid is $\Delta H=30kJmo{l}^{-1}$ and entropy of vaporisation is $\Delta S=75J{K}^{-1}mo{l}^{-1}$. Find the boiling temperature at 1 atm.

Non-degradable solid pollutants are

In the following molecule, the $C_2-C_3$ bond length is shorter than the usual $C-C$ bond length. The reason for this observation is ______
$C=\underset{\left(2\right)}{C}-\underset{\left(3\right)}{C}=C$

Give the electronic configuration of the following complexes on the basis of crystal field splitting theory. $[Co{F}_6{]}^{3-},[Fe(CN{)}_6{]}^{4-}$ and $\left[Cu\right(N{H}_3{)}_6{]}^{2+}.$

Which of the following terms are correct about enzyme?
(a) Proteins (b) Dinucleotides (c) Nucleic acids (d) Biocatalysts

The process $\Delta v=0$, for an ideal gas can be best represented in the form of a graph:

Phosphine $\left(P{H}_3\right)$ decomposes to produce $P_4\left(g\right)$ and $H_2\left(g\right)$. What would be the change in volume when $100\text{mL}$ of $P{H}_3\left(g\right)$ is completely decomposed?
$4P{H}_3\left(g\right)\to P_4\left(g\right)+6H_2\left(g\right)$

Alkyl group are o, p - directing because of