List of top Chemistry Questions

Calculate the enthalpy change of vaporisation of benzene if 13 gram of benzene vaporised by supplying 5.1 kJ of heat.

What is IUPAC name of the following compound?

Calculate the entropy change of surrounding if 2 moles of \( \text{H}_2 \) and 1 mole of \( \text{O}_2 \) gas combine to form 2 moles of liquid water by releasing 525 kJ heat to surrounding at constant pressure and at 300 K.

What is the pH of buffer solution prepared by mixing 0.01 M weak acid and 0.02 M salt of weak acid with strong base? (\( \text{pK}_{\text{a}} = 4.680 \))

The volume of simple unit cell is \( x \times 10^{-23} \text{ cm}^3 \). Calculate the value of \( x \) if volume occupied by a particle in it is \( 2.1 \times 10^{-23} \text{ cm}^3 \).

Cyclohexene on oxidation with \( \text{KMnO}_4 \) in dil. \( \text{H}_2\text{SO}_4 \) forms

Which from following polymers is classified as fibre?

Which of the following methods is used to prepare dihydrogen with purity greater than 99.5 % ?

Which from following is a correct representation of reaction rate for reaction stated below?
\( \text{N}_{2(\text{g}) + 3\text{H}_{2(\text{g})} \rightleftharpoons 2\text{NH}_{3(\text{g})} \)}

Which from following polymers is obtained by condensation polymerisation method?

Identify from following salts so that the solubility of salt in water decreases with increase in temperature.

Benzonitrile on reduction with stannous chloride in presence of hydrochloric acid followed by acid hydrolysis forms,

For a Galvanic cell consisting zinc electrode and standard hydrogen electrode,
\( \text{E}^\circ(\text{Zn}^{+2}_{(\text{aq}) \mid \text{Zn}_{(\text{s})}) = -0.76 \text{ V} \)}
Identify the reaction that takes place at positive electrode during working of cell?

What is the value of \( K_{sp} \) for saturated solution of \( \text{Ba(OH)_2 \) having pH 12 ?

What is IUPAC name of following compound?

The number of lone pair of electrons and the hybridization of Xenon (Xe) in XeOF$_2$ are

Arrange the following compounds in increasing order of their acidic strength: (A) 3-nitrophenol
(B) 3,5-Dinitrophenol
(C) 2,4,6-Trinitrophenol
(D) Phenol

What happens when C₆H₅–O–R is treated with HX?

The IUPAC name of allylamine is

In which of the following liquid inter molecular hydrogen bonding does not exist?

Benzoyl chloride is converted to benzaldehyde by

Denatured alcohol with colour and foul smell is made now a days by mixing ethanol with

Phenol is treated with $H_{2}SO_{4}$ to give a product 'X' which on treatment with conc. $HNO_{3}$ gives compound 'Y'. The compounds 'X' and 'Y' are respectively:

$S_{N}1$ reaction is most favoured by: