Explore topic-wise InterviewSolutions in .

Which of the following isoelectronic ions have lowest ionization energy?

Which of the following is a natural polymer?

Please give the product of the reactions below:

What is the correct order of increasing second ionisation energies for the elements $Be,B,C,N$ and $F?$

Which of the following cannot work as oxidising agent?

In terms of thermal stability of the alkali metal hydrides, which one is the most stable?

Which of the following is correct order of stability?

What is normality of a solution?

The emf of the cell $Zn|Z{n}^{2+}\left(0.1M\right)||F{e}^{2+}|Fe\left(0.01M\right)$ is $0.2905V$. Equilibrium constant for the cell reaction is

Select the correct order of molecular velocities.

A mixture of three amines A, B and C is treated with Benzene sulphonyl chloride and filtered.' B' is obtained in the filterate. The mixture containing A and C is treated with KOH so that' A' becomes soluble while 'C' does not. Now A, B and C are

Treatment of benzene with $CO/HCl$ in the presence of anhydrous $AlC{l}_3/CuCl$ followed by reaction with $A{c}_{2}O/NaOAc$ gives compound X as the major product. Compound X upon reaction with $B{r}_2/N{a}_{2}C{O}_3$, followed by heating at 473 K with moist $KOH$ furnishes Y as the major product. Reaction of X with $H_2/Pd-C,$followed by $H_{3}P{O}_4$ treatment gives Z as the major product.

The compound Y is:

The power of halides of boron to act as Lewis acids decreases in the order:

Phosgene is the common name for

[DPMT 1983; CPMT 1993; MP PMT 1994;

Kurukshetra CEE 1998; RPMT 2000, 02]

Calculate the pH of an aqueous solution of $1.0M$ ammonium formate assuming complete dissociation. ($p_{Ka}$ of formic acid = 3.8 and $p_{Kb}$ of ammonia = 4.8)

3 g of a salt of molecular mass 30 is dissolved in 250 g of water. The molality of the solution is:

The reaction, $3Cl{O}^{-}\left(aq\right)⟶Cl{O}_3^{-}\left(aq\right)+2C{l}^{-}\left(aq\right)$ is an example of:

Nitrogen tetra oxide $\left(N_2{O}_4\right)$ decomposes as $N_2{O}_4\left(g\right)\to 2N{O}_2\left(g\right)$. If the pressure of $\left(N_2{O}_4\right)$ falls from 0.50 atm to 0.32 atm is 30 minutes, the rate of appearance of $N{O}_2\left(g\right)$ is

The X -X bond length is 1 $\stackrel{\circ }{A}$ and Y - Y bond length is $1.54\stackrel{\circ }{A}$. If electronegativities of 'X' and 'Y' are 3.0 and 2.0 respectively, the X - Y bond length is likely to be

When Ethyl magnesium bromide is treated with heavy water, the expected compound will be

Normality of 2M sulphuric acid is

On bombarding ${}_7{N}^{14}$ with $\alpha$ -particles, the nuclei of the product formed after the release of a proton will be or In nuclear reaction ${}_7{N}^{14}{+}_{2}H{e}^4{\to }_z{X}^A{+}_1{H}^1$, the term ${}_z{X}^A$ represents

When one mole of monoatomic ideal gas at temperature $T$ undergoes adiabatic change reversibly, change in volume is from $1Lto2L$, the final temperature in Kelvin would be

IUPAC nomenclature of

An electrochemical cell has two half cell reactions as,

$Y^{3+}+3e^{-}\to Y:E=0.22V$

$Z\to Z^{3+}+3e^{-}:E=2.27V$

Calculate the $E_{cell}$.

Which of the following compound is aromatic?

If a gas at $5atm$ and $373K$ expands against a constant external pressure of $1atm$ from a volume of 2 litres to 10 litres, the amount of work done is:

(Given: $1L.atm=101.3J$)

If the radius ratio is between 0.414 - 0.732, what will be the type of void present? What will be the coordination number?

At ${25}^{0}C$ and 1 atmospheric pressure, the partial pressures in equilibrium mixture of gaseous $N_2{O}_4$ and $N{O}_2$ are 0.7 and 0.3 atm respectively. Calculate the partial pressure of the $N_2{O}_4$ gas when it is in equilibrium ${25}^{o}C$ and the total pressure of 10 atm

The kind of delocalization involving sigma bond orbitals is called:

The following diagram represents

The correct increasing order of energy between $8s$ and $8p$ orbital are

Which of the following solutions has the maximum pH value?

The species that contains 24 protons, 26 neutrons and 22 electrons would be represented by the symbol:

The kinetic theory of gases perdicts that total kinetic energy of a gaseous assembly depends on

In an exothermic reaction $A\to B$, the activation energy of reverse reaction is twice that of forward reaction. If enthalpy of the reaction is -80 kJ $mo{l}^{-1}$, the activation energy of the reverse reaction is :

Which of the statements is wrong among the following?

The number of moles of oxygen in one litre of air containing 21% oxygen by volume, under standard conditions are:

Of the given options, choose the combination that contains metals whose ores are most appropriate for roasting. In other words, Sulphide ores are common for which kind of metals?

For the chemical equilibrium, $CaC{O}_3\left(s\right)\rightleftharpoons CaO\left(s\right)+C{O}_2\left(g\right),\Delta H^{.}$,can be determined from which one of the following plots

The solubility product of $Mg(OH{)}_2$ at ${25}^{\circ }C$ is $1.4\times {10}^{-11}$. The solubility of $Mg(OH{)}_2$ in gm per litre is:

What will be the solubility of $Cd(CN{)}_2$ in $0.05\text{M}NaCN$ solution if the $K_{sp}$ is $1.0\times {10}^{-8}{\text{mol}}^3{\text{L}}^{-3}$?

$Cd(CN{)}_2\rightleftharpoons C{d}^{2+}+2C{N}^{-}NaCN\to N{a}^{+}+C{N}^{-}$

The order of the oxidation state of the phosphorous atom in $H_{3}P{O}_2,H_{3}P{O}_4,H_{3}P{O}_3$, and $H_4{P}_2{O}_6$ is

Which of the following elements is industrially produced for uranium enrichment?

Consider the composite system shown in the figure which is held at 300 K. Assuming ideal gas behavior, calculate the total pressure if the barriers separating the compartments are removed. Assume that the volume of the barriers is negligible. (Given: R = 0.082 atm $L^{-1}mo{l}^{-1}{k}^{-1}$ ­­)

Among the following which one is linear?