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The temperature at which RMS velocity of $S{O}_2$ molecules is half that of He molecules at 300 K is

Calculate average oxidation number of $S$ in $S_4{O}_6^{2-}$ respectively.

Which is the Claisen condensation product of ethyl propanoate ?

The suffix used for alcohol is

The basicity of aniline is less than cyclohexylamine. This is due to:

Which of the following has the lowest dipole moment?

Predict the major organic product for given Friedel-Crafts alkylation reaction:

If 3-hexanone is reacted with $NaB{H}_4$ followed by hydrolysis with $D_{2}O$, the product will be

A circular dis is to be made by using iron and aluminum so that it acquired maximum moment of inertia about geometrical axis.It is possible with?

Ortho
and
para
nitrophenols
are more acidic than phenol. Draw the resonance structures of the
corresponding phenoxide ions.

The energy of an electron in an excited hydrogen atom is $-3.4\text{eV}$. Its angular momentum will be:

$(\text{Take}h=6.626\times {10}^{-34}\text{Js})$

Two electrons occupying the same orbital may be distinguished by:

Which of the 3d
series of the transition metals exhibits the largest number of
oxidation states and why?

1. What is enthalpy ?

2. what do you mean by ` a metal atom should have very low ionisation enthalpy '?

The metal which does not form ammonium nitrate by reaction with dilute nitric acid is

The enolic form of ethyl acetoacetate as below has

For a hypothetical reaction $A\left(g\right)+3B\left(g\right)\rightleftharpoons 2C\left(g\right)\Delta H=–100kJ$ and $\Delta S=–200J{K}^{-1}$
Then the temperature at which the reaction will be in equilibrium.

The atomic number of other elements which lie in the same group as the tenth element in the periodic table are

For 3-D hexagonal closed packing structure (with similar particles), the correct relation between radius of atoms (r) and height of unit cell (h) is :

Solubility of $KN{O}_3$ at $333\text{K}$ is $106\text{g}$. What mass of $KN{O}_3$ is needed to form a saturated solution in $75\text{g}$ of water at $333\text{K}$?

(Note: saturated solution is formed by dissolving substance in $100\text{g}$ of water)

A compound is reacted according to the reaction sequence given below to give product 'A'. Identify 'A':

What is the complete IUPAC name of the following stereoisomer ?

For the equilibrium, $N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2N{H}_3\left(g\right),$ the equilibrium constant, $K_p$ is expressed as:

How many stereoisomers are possible for the following molecule ?