Explore topic-wise InterviewSolutions in Current Affairs.

Graphite is a good conductor of electicity due to the presence of ............

(a) lone pair of electrons (b) free valence electrons

(c) cations (d) anions

Thermos flask containing tea is an example of:

Thallium shows different oxidation states
because:

Calculate the formal charge on the chlorine atom in $HCl{O}_3?$

For the formation of covalent bond, the difference in the value of electronegativities should be

The
radionuclide ¹¹C
decays according to

The
maximum energy of the emitted positron is 0.960 MeV.

Given
the mass values:

calculate
Q
and
compare it with the maximum energy of the positron emitted

Predict the product of the Claisen schmidt reaction of the given substrate.

Which reducing agent is used for obtaining pure Fe from its oxide. What is the name of this reaction?

Molarity of the concentrated HCl if the density is 1.17g/ml

Electron gain enthalpy is most negative for:

Which defect causes decrease in the density of crystal

[KCET 2000, 05]

Among Mg, Cu, Fe, Zn, the metal that does not produce hydrogen gas in reaction with hydrochloric acid is.

How does molar conductivity of strong and weak electrolytes vary with concentration?

Use bond energies to estimate the enthalpy of formation of HBr(g).
BE(H-H) = 436 kJ/mol
BE(Br-Br) = 192 kJ/mol
BE(H-Br) = 366 kJ/mol

A large number of oxyacids of Sulphur are known. Those oxyacids with S-S linkages are in general referred to as __ acids.

The equilibrium constants of the following are

$N_2+3H_2\rightleftharpoons 2N{H}_3;K_1$

$N_2+O_2\rightleftharpoons 2NO;K_2$



$H_2+\frac{1}{2}{O}_2\rightleftharpoons H_{2}O;K_3$

The equilibrium constant (K) of the reaction:

$2N{H}_3+\frac{5}{2}{O}_2\stackrel{K}{\rightleftharpoons }2NO+3H_{2}O$ will be

What is the effect of pCO₂ on oxygen transport?

At $25{}^{\circ }\text{C},$ the solubility product $\left(K_{sp}\right)$ of $Ca{F}_2$ in water is $3.2\times {10}^{-11}{\text{mol}}^3{\text{L}}^{-3}.$ The solubility (in mole per litre) of the salt at the same temperature (ignore ion pairing) is:

Modern non-stick cookware and the flat end of an electric iron has a coating of a polymer. Identify the name of the polymer.

The outermost electronic configuration of the most electronegative element is

Calculate the amount of ice that will separate out on cooling a solution containing $50\text{g}$ of ethylene glycol in $200\text{g}$ of water till $-{9.3}^{\circ }C(K_f$ for water $=1.86{\text{Kkgmol}}^{-1})$

In which of the following oxoacids of sulphur, peroxy linkage is present?

[0.77 Mark]

For a hypothetical hydrogen like atom, the potential energy of the system is given by $U_{\left(r\right)}\left(r\right)=\frac{-K{e}^2}{r^3}$, where $r$ is the distance between the two particles. If Bohr’s model of quantization of angular momentum is applicable, then the velocity of the particle is given by:

The major product obtained in the reaction of toluene with 1-bromo-2-methyl propane in the presence of anhydrous $AlC{l}_3$ is:

A solution which has $10g$ of solvent and $0.20g$ of solute (mol. mass 122 g/mol) freezes at ${0.5}^{\circ }C$ below the freezing point of pure solvent. If the solute exists as dimer in the solvent, choose the correct option :

$(K_f{)}_{\text{solvent}}=5.12Kk{g}^{-1}mo{l}^{-1}$

Here,

$i=\text{Van't hoff factor}\beta =\text{Degree of association}$

Hydrolysis of dimethyldichloro silane, $(C{H}_3{)}_{2}SiC{l}_2$ followed by condensaiton polymerisation yields straight chain polymer of

After completion of reaction I and reaction II, the organic compounds in the reaction mixture are:

Which of the following is a chemical formula of a compound that is used as in manufacturing disinfectants as well as plastics?