Explore topic-wise InterviewSolutions in Current Affairs.

The radius of Na⁺ ion is 95pm and that of Cl^- ion is 181pm. Predict whether the coordination number of Na⁺ ion is 6 or 4 ?

Which of the following species can act both as Bronsted acid and base?
(I)$N{H}_2^{-}$ (II)$HC{O}_3^{-}$ (III) $AlC{l}_3$ (IV)All of these

Which of the following does not undergo Aldol condensation?

When alpha particles are sent through a thin metal foil, most of them go straight through the foil because :

What is the anhydride of H₃PO₃?

Among the following, which is the condition favourable for the formation of $C{H}_{3}OH$ from $CO$ and $H_2$ ?

The rates of diffusion of $S{O}_2,C{O}_2,PC{l}_{3}andS{O}_3$ are in the following order –

Which of the following alcohol gives blue colouration in Victor Mayers test

How many of these reactions are homogeneously catalyzed? ___

(i) $2SO2\left(g\right)+O_2\left(g\right)\stackrel{NO\left(g\right)}{\to }2S{O}_3\left(g\right)$

(ii) $C_{12}{H}_{22}{O}_{11}(aq.)+H_{2}O\left(\ell \right)\stackrel{H_{2}S{O}_4\left(\ell \right)}{\to }\underset{Glucose}{C_6{H}_{12}{O}_6}(aq.)+\underset{Fructose}{C_6{H}_{12}{O}_6}(aq.)$

(iii) $2S{O}_3\left(g\right)+O_2\left(g\right)\stackrel{Pt\left(s\right)}{\to }2S{O}_3\left(g\right)$

(iv) $N_2\left(g\right)+3H_2\left(g\right)\stackrel{Fe\left(s\right)}{\to }2N{H}_3\left(g\right)$

(v) $4N{H}_3\left(g\right)+5O_2\left(g\right)\stackrel{Pt\left(s\right)}{\to }4NO\left(g\right)+6H_{2}O\left(g\right)$

(vi) $C{H}_{3}COOC{H}_3\left(\ell \right)\stackrel{HCl\left(\ell \right)}{\to }C{H}_{3}COOH(aq.)$

(vii) Vegetable oils $\left(\ell \right)+H_2\left(g\right)\stackrel{Ni\left(s\right)}{\to }$ Vegetable ghee

Balance the following chemical equation in basic medium:$\underset{\left(aq\right)}{Mn{O}_4^{-}}+\underset{\left(aq\right)}{B{r}^{-}}\to \underset{\left(s\right)}{Mn{O}_2}+\underset{\left(aq\right)}{Br{O}_3^{-}}$

For the reaction,

$2H_2\left(g\right)+O_2\left(g\right)\to 2H_{2}O\left(g\right)$; $\Delta H=-571kJ$.

Bond energies: $(H-H)=435kJ$, $(O=O)=498kJ$.

Calculate the average bond energy of $(O-H)$ using the above data.

Electrolytic conduction differs from metallic conduction in that in the case of electrolytic conduction

[KCET 1987; Bihar CEE 1992]

Among the compounds, the most susceptible to nucleophilic attack to carbonyl group is

Which of the following gives positive iodoform test?

Among the following, the least stable resonance structure is:

Arrange the following groups
$-F,-OH,-N{H}_2$ in the increasing order of their $-I$ effect.

What is the correct order of reactivity of alcohols in the following reaction?
$R-OH+HCl\stackrel{ZnC{l}_2}{\to }R-Cl+H_{2}O$
(a) $1^{\circ }>2^{\circ }>3^{\circ }$
(b) $1^{\circ }<2^{\circ }>3^{\circ }$
(c) $3^{\circ }>2^{\circ }>1^{\circ }$
(d) $3^{\circ }>1^{\circ }>2^{\circ }$

When dioxygen is adsorbed on a metallic surface, the electron transfer occurs from the metal to the molecule. The true statements regarding this adsorption are:

A sample of a gas contains $N_1$ molecules and the total kinetic energy at $-{123}^{\circ }$C is $E_1$ ergs. Another sample of a gas at ${27}^{\circ }$C has a total kinetic energy as $2E_1$ ergs. Assuming gases to be ideal, the number of gas molecules in the second sample will be:

A complex of the type $\left[M\right(AA{)}_2{X}_2{]}^{n+}$ is known to be optically active. What does this indicate about the structure of the complex? Give one example of such complex.

The kinetic energy of $N$ molecules of $O_2$ is $x$ joule at $-{123}^{\circ }\text{C}$. Another sample of $O_2$ at ${27}^{\circ }\text{C}$ has a kinetic energy of $2x$. The latter sample contains ____ molecules of $O_2$:

Which of the following is the staggered conformation for rotation about $C_1$ and $C_2$ bond in the following structure?

Benezene reacts with $C{H}_{3}COCl$ in the presence of $AlC{l}_3$ to give

Consider the following processes and respective energy change-
$M\left(s\right)\to M\left(g\right).....\left(a\right)$
$M\left(s\right)\to M^{2+}\left(g\right)+2e^{-}.....\left(b\right)$
$M\left(g\right)\to M^{+}\left(g\right)+e^{-}.....\left(c\right)$
$M^{+}\left(g\right)\to M^{2+}\left(g\right)+e^{-}.....\left(d\right)$
$M\left(g\right)\to M^{2+}\left(g\right)+2e^{-}.....\left(e\right)$
Energy required to change $M\left(s\right)$ into $M^{+}\left(g\right)$ is -

Write chemical reactions to justify that hydrogen peroxide can function as an oxidizing as well as reducing agent.

Bragg's law is given by the equation

[MP PMT 1995, 2002]

The distillation technique most suited for separating glycerol from spent - lye in the soap industry is :

In the following reaction A is:

Z is

It is because of the inability of $n{s}^2$ electrons of the valence shell to participate in bonding that

Why are $M{n}^{2+}$ compounds more stable than $Fe2+$ towards oxidation to their +3 state?

For the electrochemical cell, M|M⁺ | | X |X^-, Pt. E^o(M⁺/M) = 0.44 V and E^o(X/X^-) = 0.33 V. From this data one can deduce that

Which amongst the following were implications of Joule's experiment, as discussed in the previous problem?

Among the boron halides, which is the strongest lewis acid?

Which of the following is an electrophilic reagent ?

1) ROH 2) BF₃ 3)NH₃ 4)RO^-