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Which amongst the following is the strongest acid?

In the following questions two Statement - 1 (Assertion) and Statement - 2 (Reason) are provided. Each question has 4 choices (a), (b), (c) and (d) for its answer, out of which ONLY ONE is correct. Mark your responses from the following options:

Statement - 1 : Electromagnetic radiation will be emitted for the transition $2P_z\to 2p_x$.

Statement - 2 : No transition of electron takes place between $2P_z$ and $2P_x$ orbitals.

From the following reaction sequence:

$C{l}_2+2KOH\to KCl+KClO+H_{2}O$

$3KClO\to 2KCl+KCl{O}_3$

$4KCl{O}_3\to 3KCl{O}_4+KCl$

Calculate the mass of chlorine that reacts with an excess of $KOH$ needed to produce $100\text{g}$ of $KCl{O}_4$.

What is the electron separation energy (in $eV$) for $B{e}^{3+}$ in the first excited state.

Mole fractions of A and B in a mixture in which $6.023\times {10}^{23}$ molecules of A and $10.4\times {10}^{23}$ molecules of B are present are:

Aluminum appears like gold when mixed with

500 ml of 0.1 M KCl, 200 ml of 0.01 M $NaN{O}_3$ and 500 ml of 0.1 M $AgN{O}_3$ was mixed. What is the total number of moles of ions in solution?

Arrange the following oxides in the decreasing orders of their basic strength.

$I.T{l}_{2}O$ $II.A{l}_2{O}_3$ $III.T{l}_2{O}_3$ $IV.G{a}_2{O}_3$

The above reaction proceeds through

Which one of the following carbocation violates Bredt's rule?

Hyperconjugation is maximum for which of the following carbocations?

Fraction of total volume occupied by atoms in a simple cubic cell is

Gadolinium (Gd) has a $4f^{7}5d^{1}6s^2$ electronic configuration outside the [Xe] core. Find the spin only magnetic moment of $G{d}^{3+}$.

If the current is passed into the solution of an electrolyte

[AIIMS 1979]

Which compound would give only oxalaldehyde (ethanedial) upon ozonolysis?

5.0 g of a certain element X forms 10.0g of its oxide having the formula $X_4{O}_6$. The atomic mass of X is ?

Which is most basic?

Which one of the following is not characteristic of the solid state?

Ring chain isomerism is due to:

To raise the temperature of $1$ mole of a diatomic gas by $1{}^{\circ }C$ at constant pressure, the required amount of heat is $120cal.$

The amount of heat which goes as the internal energy is almost equal to:

Calculate the volume of $0.2\text{N}NaOH$ required for neutralising the solution obtained by mixing $20\text{mL}$ of $0.1\text{N}{H}_{2}S{O}_4$ and $20\text{mL}$ of $0.1\text{N}HCl$.

If the molar solubility $\left(inmol{L}^{-1}\right)$ of a sparingly soluble salt $A{B}_3$​ is $s$. The corresponding solubility product is $K_{sp}$. The solubility $\left(s\right)$ can be written in terms of $K_{sp}$ by the relation:

Assume ideal gas behaviour. For the reaction, $N_2{O}_5\left(g\right)\rightleftharpoons 2N{O}_2\left(g\right)+0.5O_2\left(g\right)$, the initial pressure is 600 mmHg and the pressure at any time is 960 mmHg. The fraction of $N_2{O}_5\left(g\right)$ decomposed at constant volume and temperature is:

If the $Z_{eff}$ of cubes a, b and c is x, y and z respectively, find xyz. (For instance if x = 2, y = 3, z = 5, xyz = 235)

a)

b)

c)

The total weight of ${10}^{22}$ molecular units of $CuS{O}_4.5H_{2}O$ is nearly

Pressure of 10 moles of an ideal gas is changed from 2 atm to 1 atm against constant external pressure without change in temperature. If surrounding temperature (300 K) and pressure (1 atm) always remains constant then calculate total entropy change ($\Delta S_{system}+\Delta S_{surrounding})$ for given process. [Given: ℓn2 = 0.70 amd R=8.0 J/mol/K]

Assertion : Formaldehyde cannot be prepared by Rosenmund's reduction.

Reason : Acid chlorides can be reduced into aldehydes with hydrogen in boiling xylene using palladium or platinum as a catalyst supported on barium sulphate. This is known as Rosenmund's reduction.

Ice and water are placed in a closed container at a pressure of 1 atm and temperature 273.15 K. If pressure of the system is increased to 2 atm while keeping temperature constant, which of the following would be the correct observation ?

A carbonyl group can be converted into a methylene group by:

A solution of 200 mL of 1 M KOH is added to 200 mL of 1 M HCl and the mixture after attaining reaction equilibrium shows a rise in temperature by $△T_1.$ The experiment is repeated by using 50 mL of 1 M KOH and 50 mL 1 M HCl which at equilibrium shows a rise in temperature by $△T_2.$ Thus:

Correct order of bond angle is

Lactose molecule is made up of β-d (-) galactopyranose and β-d (+) gluco pyraonose. The number of - OH groups present in it are

The equilibrium constants for the following are:

$N_2+3H_2\rightleftharpoons 2N{H}_3{K}_1$

$N_2+O_2\rightleftharpoons 2NO{K}_2$

$H_2+\frac{1}{2}{O}_2\to H_{2}O{K}_3$

The equilibrium constant (K) of the reaction:

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

Strong electrolytes are those which

[MNR 1983]

$1.5276g$ of $CdC{l}_2$ was found to contain $0.9367g$ of $Cd$. Atomic weight of $Cd$ is

ASSERTION: n-Pentane and n-Hexane belong to a homologous series.

REASON: n-Pentane and n-Hexane belong to the same class of hydrocarbons and they differ by a - $C{H}_2$ - group.

Which among the following are the repulsive forces acting between two atoms A and B?

If $e_A$, $e_B$ represents electrons of atom A and B respectively and $N_A$, $N_B$ represents nuclei of atom A and B respectively.

What is the final product 'P' in the following reaction sequence?

A solution of $CuS{O}_4$ is

The half - life of a radioactive element is 30 min. The time interval between the stages of 33.3% and 67.7% decay will be ?

Among group 13 elements, the one that strictly forms covalent compounds is:

The wavelength associated with a golf ball weighing 200g and moving at a speed of 5m/h is of the order

Which of the following is not a correct match?

Polymer Monomer/s