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An organic compound contains carbon and hydrogen. Its elemental analysis gave $C-75\%$ and $H-25\%$. The empirical formula of the compound would be:

Chloropicrin is obtained by the reaction of

For the reaction A + B $\leftrightharpoons$ C + D the equilibrium constant is

Temporary hardness may be removed from water by adding

What will be the oxidation number of underlined element : $KAl(\underset{–}{S}{O}_4{)}_2.12H_{2}O$

The structure of the carbonyl compound P, which gives positive iodoform test undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S.





The structure of the carbonyl compound P is:

Calculate the ratio of energies of $H{e}^{+}$ for $1^{st}$ & $2^{nd}$ excited state.

Peroxy acids of sulphur are:

Arrange the compounds in an increasing order of their basic strengths:

For a given reaction

$aA+bB⟶cC+dD$

where $a,b,c,d$ are the stoichiometric coefficients of $A,B,C,D$ respectively.

Choose the correct statement(s):

What is the IUPAC name of the following compound?

A spectral line in the spectrum of H atom has a wavenumber of $15222.22c{m}^{-1}$ . The transition responsible for this radiation is (Rydberg constant $R=109677c{m}^{-1}$)

In this given reaction



$HOC{H}_2-C{H}_{2}OH\stackrel{\left[X\right]}{\to }HCHO+HCHO$

[X] will be:



$\left(a\right)lmoleofHI{O}_4\left(b\right)2molesofHI{O}_{4}j$

$\left(c\right)conc.HN{O}_3\left(d\right)Mn{O}_2$

Determine the heat energy needed to increase the temperature of $10.0\text{mol}$ of mercury by $7.5K$. The value of heat capacity for given amount of mercury is $27.8kJ{K}^{-1}$

What is the shape of the molecules which have ${sp}^{3}d$ hybridization?

In a 100 ml solution of acetic acid (0.08 N), an adsorbent (2 grams) was added. The adsorbent was then removed and the strength of the remaining solution was found to be (0.04 N). The amount of acetic acid adsorbed per gram is

2 grams of Helium diffuses from a porous plate in 4min. How many grams of $C{H}_4$ would diffuse through the same plate in same time under similar conditions?

The electrical resistance of a column of 0.05 M NaOH solution of diameter 1 cm and length 50 cm is $5.55\times {10}^3$ ohm. Calculate its resistivity, conductivity, and molar conductivity.

An element $X$ that has the configuration $n{s}^{2}n{p}^1$ is present in a short period of the modern periodic table. The formula and nature of its oxide is:

Which one of the following oxides exhibits paramagnetic behaviour?

The orbitals that are oriented along the axes among the following is:

The sequence for the stability of carbanions $H-C\equiv C^{-},H_{2}C=\stackrel{-}{C}H$ and ${}^{-}C{H}_3$ is:

A sea diver at depth of 45 m exhales a bubble of air that is 1.0 cm in radius. Assuming the ideal behaviour, find out radius of this bubble as it breaks at the surface of water?

Isomers of hexane, based on their branching, can be divided into three distinct classes as shown in the figure.

The correct order of their boiling point is

What volume of air at STP containing 25% of oxygen by volume is required to completely form carbon dioxide from 2000 g of carbon containing 36% of incombustible matter?

What does termolecular refer to?

Compound(s) that on hydrogenation produce(s) optically inactive compound(s) is (are)

Which of the following are functional isomers of?

Which is used in the manufacture of plastic

If heat of dissociation of $CHC{l}_{2}COOH$ is $0.7kcal/mole$ then $\Delta H$ for the reaction:

$CHC{l}_{2}COOH+KOH\to CHC{l}_{2}COOK+H_{2}O$

Specify the hybridisations of the central atoms in $N_3^{-},NOCl$ and $N_{2}O$.

Which of the following conformers for ethylene glycol is most stable?

The correct order of electron affinity is

The electron affinity of Be is almost similar to that of?

An alkene given two moles of HCHO, one mole of $C{O}_2$ and one mole of $C{H}_{3}COCHO$ on ozonolysis. What is its structure

Acetic acid dissociates in an equilibrium with acetate ion and proton. When a small amount of HCl is added:

Which of the following set of species have the same hybridisation state but different shapes?

Which graph shows the correct trends for the size of $L{n}^{3+}$ ions?

Given the following reaction at equilibrium $N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2N{H}_3\left(g\right)$. Some inert gas at constant pressure is added to the system. Which one of the following will happen?

Increasing order of $C-O$ bond length in $CO$, $C{O}_2$ and $C{O}_3^{2-}$ is:

Which of the following species has lowest ionisation enthalpy?

In the following reaction :

$2NO+O_2\stackrel{k^{\prime }}{\to }2N{O}_2$

What is the predicted rate law, if the mechanism is given as :

$NO+O_2\stackrel{K_{eq}}{\rightleftharpoons }N{O}_3$ (Fast)

$N{O}_3+NO\stackrel{k_1}{\to }N{O}_2+N{O}_2$ (Slow)

Which of the following is position and chain isomer of

:

When a light of wavelength ${}^{\prime }{\lambda }^{\prime }$ falls on the surface of a metal with threshold wavelength ${}^{\prime }{\lambda }_0^{\prime }$, an electron of mass '2m' is emitted. The de Broglie wavelength of emitted electron is:

Which of the following compounds have same geometry ammong the following :

(i) $H_{2}O$ (ii) $AlC{l}_3$ (iii) $C{H}_4$ (iv) $N{F}_3$