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When diethyl ether is treated with excess of Cl₂ in presence of sunlight, then the product formed is

In which of the following reactions is the enthalpy of neutralization least negative?

In the Balmer series of the hydrogen spectrum, the third line corresponds to which one of the following inter-orbit jumps of the electron:

The correct stability order of the following three quinones is ?

Find the mass of $29.12\text{L}$ of $S{O}_3$ gas at STP.

What is the value of 8.0 km in inches?

(1 m = 1.094 yards & 1 yrd = 36 inches)

Diborane

n - hexane and n - heptane, when passed through $C{r}_2{O}_3$ supported over alumina at ${600}^0$ C respectively give

A decimolar solution of potassium ferrocynide is $50\%$ dissociated at 300 K. Given $S=8.314J{K}^{-1}mo{l}^{-1}$. The osmotic pressure of the solution is :

The molecule(s) that will have dipole moment is/are:

Mond’s Process involves

Calculate $△G^{\ominus }$ for the following reaction:

$CO\left(g\right)+\frac{1}{2}{O}_2\left(g\right)\to C{O}_2\left(g\right)$; $△H^{\ominus }$ = -282.84 kJ

Given,

$S^{\ominus }C{o}_2=213.8J$ $K^{-1}mo{l}^{-1}$, $S^{\ominus }CO\left(g\right)$ = 197.9 J $K^{-1}mo{l}^{-1}$,

$S^{\ominus }C{o}_2=205.0J$ $K^{-1}mo{l}^{-1}$

Bond angles in $H_{2}O$ and $BeC{l}_2$ respectively are:

Which one of the following structures represents the neoprene polymer?

(IIT-JEE, 2015)

Calculate the degree of hydrolysis ($h$) of a $0.1M$ sodium acetate solution at $298K$.

Given: $K_a=1.8\times {10}^{-5}$

Which of the following are iso-electronic and iso-structural?

$N{O}_3^{-}$, $C{O}_3^{2-}$, $Cl{O}_3^{-}$, $S{O}_3$

Which of the following orders of ionic radii is correctly represented?

An alkyl bromide (A) forms Grignard reagent which on treatment with water, yields n-hexane. (A) On treatment with sodium forms 4,5-diethyloctane. (A) is:

The reaction A $\to$ C has activation for the forward and the backward reaction as 25 kJ and 32 kJ respectively. The $\Delta$ H for the reaction is

In the reaction A(g) + 2B(g) $\rightleftharpoons$ C(g) + Q kJ of heat, more product will be obtained

or the forward reaction is favoured by

In which of the following cases, the product of reductive ozonolysis has the same number of carbon atoms as in the reactant?

A chemist synthesized a greenish yellow gaseous compound of chlorine and oxygen and found its density to be $7.71\text{g/L}$ at ${36}^{\circ }\text{C}$ and 2.88 atm. The molecular formula of the compound is:

Which plot best represents the potential energy (E) of two hydrogen atoms as they approach one another to form a hydrogen molecule?

Consider the redox reaction giben below :

$I{O}_3^{-}\left(aq\right)+Rd\left(s\right)+H_{2}O\to Rd{O}_4^{-}\left(aq\right)+I^{-}\left(aq\right)+H^{+}$

What will be the correct coefficient of the $I{O}_3^{-}$, $H_{2}O$ and $H^{+}$ respectively.

Viscosity

Which would be the correct product for the following reaction?

Degree of dissociation $\alpha$ =

Which of the following group(s) shows $+M$ effect ?

The kinetic energy of an electron is $4.55\times {10}^{-25}J$. The mass ofelectron is $9.1\times {10}^{-31}kg$. Calculate velocity of the electron.

Let’s say you have a beaker with ice, water and water vapour together. What is the number of phases and what is the number of components you would find in this beaker?

Among the following, which qualifies as a pseudohalogen?

The heat of combustion of ethylene at ${18}^{\circ }C$ and at constant volume is -335.8 K cal when water is obtained in liquid state. What is the heat of combustion at constant pressure and at ${18}^{\circ }C$.

The number of aldol reaction(s) that occur in the given transformation is:

Which of the assumptions of the kinetic-molecular theory best explains the observation that a balloon collapses when exposed to liquid nitrogen (which is much colder than a cold winter day)?

In which of the following molecules/ions are all the bonds not equal?

The work function of a metal is $4\text{eV}$. To emit a photoelectron of zero velocity from the surface of the metal, the wavelength of the incident light should be:

The hybridization of any of the Carbon atoms in $C_2{H}_2$ is

Dry air was passed successively through a solution of 5 gm of a solute in 80 gm of water and then through pure water. The loss in weight of solution was 2.50 gm and that of pure solvent 0.04 gm . What is the molecular weight of the solute?

One of the essential alpha amino acid is

When tert-butylchloride is added to an equal amount of ethanol in an inert solvent, one of the products is ethyl tert-butyl ether. When the concentration of ethanol is doubled, the rate of the reaction:

Which electronic transition in a hydrogen atom, starting from the orbit $n=7$, will produce infrared light of wavelength 2170 nm?

(Given: $R_H=1.09677\times {10}^7{m}^{-1}$)

Find the equivalent weight of $KMn{O}_4$ in the given reaction, if the molar mass of $Mn{O}_4^{-}$ is 'M' ?

$KMn{O}_4\to M{n}^{2+}$ (acidic medium)

Ionisation energy and electron affinity of fluorine are respectively $17.42$ and $3.45\text{eV}.$ Calculate the electronegativity of fluorine atom on Pauling's scale.

The charge on the electron was found out by

Amount of ${}_{53}{I}^{128}(t_{\frac{1}{2}}=25min)left$ after 75 minutes is

One mole of a substance may contain 6.023 x 10²³ :