A gaseous mixture of two substances \(A\) and \(B\), under a total pressure of \(0.8\,atm\) is in equilibrium with an ideal liquid solution. The mole fraction of substance \(A\) is \(0.5\) in the vapour phase and \(0.2\) in the liquid phase. The vapour pressure of pure liquid \(A\) \(......\) is atm. (Nearest integer)

The correct shape and \(I-I-I\) bond angles respectively in \(I _{3}^{-}\) ion are :-

The theory that can completely/properly explain the nature of bonding in \([Ni(CO)_4]\) is

From the following, how many compounds contain at least one secondary alcohol ?

Choose the correct answer from the options given below :

Find out the statements which are not true.
A. Resonating structure with more number of covalent bonds and lesser charge separation are more stable.
B. In electromeric effect, an unsaturated system shows + E effect with nucleophile and - E effect with electrophile.
C. Inductive effect is responsible for high melting point, boiling point and dipole moment of polar compounds.
D. The greater the number of alkyl groups attached to the doubly bonded carbon atoms, higher is the heat of hydrogenation.
E. Stability of carbanion increases with the increase in s-character of the carbon carrying the negative charge.
Choose the correct answer from the options given below.

Among the oxides of nitrogen \(N_2O_3,\,N_2O_4\) and \(N_2O_5;\)  the molecule \((s)\)  having nitrogen-nitrogen bond is/are

The correct stability order of the following diazonium salt isVedClass-Data Entry

The percentage decrease in the weight of a rocket, when taken to a height of \(32 km\) above the surface of earth will, be\(.....\%\) (Radius of earth \(=6400\,km\) )

From the given data, the amount of energy required to break the nucleus of aluminium \({ }_{13}^{27} {Al}\) is \(....\,x \times 10^{-3} {J}\) Mass of neutron \(=1.00866 \,{u}\) Mass of proton \(=1.00726 \,{u}\) Mass of aluminium nucleus \(=27.18846\, {u}\) (Assume \(1\,u\) corresponds to \(x\,J\) of energy) (Round off to the nearest integer)

A uniform circular disc of radius ' R ' and mass ' M ' is rotating about an axis perpendicular to its plane and passing through its centre. A small circular part of radius \(\mathrm{R} / 2\) is removed from the original disc as shown in the figure. Find the moment of inertia of the remaining part of the original disc about the axis as given above.

The number of non-ionisable hydrogen atoms present in the final product obtained from the hydrolysis of \(\mathrm{PCl}_{5}\) is :

The number of sigma bonds in \(\begin{array}{*{20}{c}} {{{\rm{H}}_3}{\rm{C}} - {\rm{C}} = {\rm{CH}} - {\rm{C}} \equiv {\rm{C}} - {\rm{H}}}\\ {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\ {H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \end{array}\) is \(......\)

A diatomic gas \((\gamma=1.4)\) does 100 J of work when it is expanded isobarically. Then the heat given to the gas _________ J.