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For gases $C{H}_4\left(g\right)$ and $N_2\left(g\right)$ Both gases are in the same sealed flask with a total pressure of 750 mmHg. The partial pressure of $N_2\left(g\right)$ is 500 mmHg. Which is / are incorrect graph.

An ethereal solution of alkyl halide is heated with sodium metal. The reaction is known as:

Which of the following compounds is consumed during the preparation of $N{a}_{2}C{O}_3$ by Solvay's process?

The product of oxidation of $I^{-}$ with $Mn{O}_4^{-}$ in alkaline medium is:

Which of the following are diastereomers?

What is the value of 200 lb in kilograms?

In which of the following compounds does manganese have the maximum radius?

Benzene diazonium chloride on reaction with KCN in the presence of CuCN yields X. X on hydrolysis gives Y. Y can also be obtained from

For which of the following reactions, $\Delta H\ne \Delta U$?

Solubility product constant ($K_{sp}$) of salts of types MX, $M{X}_2$ and $M_{3}X$ at temperature 'T' are $4.0\times {10}^{-8},3.2\times {10}^{-14}$ and $2.7\times {10}^{-15},$ respectively. Solubilities (mol $d{m}^{-3}$) fo the salts at temperature 'T' are in the order

Which of the following has highest % enol content in the liquid?

An organic acid P $C_{11}{H}_{12}{O}_2$ can easily be oxidized to a dibasic acid which reacts with ethylene glycol to produce a polymer dacron. Upon ozonolysis, P gives an aliphatic ketone as one of the products. P undergoes the following reaction sequences to furnish R via Q. The compound P also undergoes another set of reactions to produce S.



The compound S is :

If the radius of first orbit of H - atom is $a_0$, then de Broglie wavelength of electron in 4th orbit is ?

Van Arkel method is used for

0.250 moles of $HCl$ gas occupies how many liters at STP?

In Rutherford's scattering experiment, which of the following does not happen?

which of the following is not an antihistamine

The electronic configurations of the elements $X,Y,Z$ and $J$ are given below. Which element has the highest metallic character?

$X=2,8,4$

$Y=2,8,8$

$Z=2,8,8,1$

$J=2,8,8,7$

Detection of chlorine is possible without preparing sodium extract in

A gaseous mixture of propane and butane of volume $3$ litre on complete combustion produces $11.0$ litre $C{O}_2$ under standard conditions of temperature and pressure. The ratio of volume of butane to propane is:

Which of the following can exhibit geometrical isomerism?

The equilibrium constant for the reaction given below is $2.0\times {10}^{-7}$ at 300 K. Calculate the standard entropy change if $△H^{\circ }=28.40kJmo{l}^{-1}$ for the reaction:

$PC{l}_5\left(g\right)\rightleftharpoons PC{l}_3\left(g\right)+C{l}_2\left(g\right)$

Which of the following is the strongest conjugate base

Which of the following elements has maximum first ionization potential?

At ${80}^{\circ }C$, distilled water has hydronium ion $\left(H_3{O}^{+}\right)$ concentration equal to $1\times {10}^{-6}mol/L$. The value of $K_w$ at this temperature would be:

Phosphine is obtained by the reaction when:

Hydrogen cannot be obtained by:

Two elements $X$ and $Y$ (atomic mass of $X=75\text{u}$,$Y=16\text{u}$) combine to give a compound that has 76% of $X$. The formula of the compound is:

The effective resistance between points P and Q of the electrical circuit shown in the figure is

Calculate the frequency of the spectral line corresponding to the transition of an electron from $n_2=4$ to $n_1=2$ in a hydrogen atom.

The following reaction occurs in acidic aqueous solution:

$H_{3}As{O}_4+Zn\to As{H}_3+Z{n}^{2+}$

$H_{3}As{O}_4$ is a ______ agent in which the oxidation number of $As$ is _______ .

Most basic oxide out of following is:

Boron cannot form which one of the following anions?

Which graph represents the correct trend in atomic radii of transition elements?

Identify the product D in the following series of reaction

$C{H}_{3}COOH\stackrel{LiAl{H}_4}{\to }A\underset{443K}{\overset{H^{+}}{\to }}B\stackrel{B{r}_2}{\to }C\underset{KOH}{\overset{alc.}{\to }}D$

How many aldose, ketose, furanose, pyranose and hemiacetal units are present respectively in the following molecule?

You have prepared a nice sample of $N_0$ radioactive nuclei of decay constant $\lambda$, and want to show it off to your friends. When they arrive units of time later, you open the lid and find there are only ___nuclei left intact.

On moving across a period, the atomic size decreases and nuclear charge increases and therefore the force of attraction exerted by the nucleus on the electron in the outermost shell increases.

The first ionization potentials (in eV) of As and Se atoms, respectively, are:

A dye absorbs a photon of wavelength λ and re-emits the same energy into two photons of wavelength ${\lambda }_1$ and ${\lambda }_2$ respectively. The wavelength λ is related with ${\lambda }_1$ and ${\lambda }_2$ as:

Consider the chemical reaction,

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

The rate of this reaction can be expressed in terms of time derivatives of concentration of $N_2\left(g\right),H_2\left(g\right)orN{H}_3\left(g\right)$. Identify the correct relationship amongst the rate expressions.

The number of geometric isomers that can exist for square planar $\left[Pt\right(Cl\left)\right(py\left)\right(N{H}_3\left)\right(N{H}_{2}OH){]}^{⨁}$ is (py = pyridine) :

A container with insulating walls is divided into two equal parts by a partition fitted with a valve. One part is filled with an ideal gas at a pressure P and temperature T, whereas the other part is completely evacuated. If the valve is suddenly opened, the pressure and temperature of the gas respectively will be: