List of top Chemistry Questions

What happens when chlorobenzene and methyl chloride are treated with sodium metal in dry ether?
What type of nucleophilic substitution (\( \text{S}_\text{N}1 \) or \( \text{S}_\text{N}2 \)) occurs in the hydrolysis of 2-Bromobutane to form \( (+-) \)-Butan-2-ol? Give reason.
Why does the presence of nitro groups at ortho- and para- positions in haloarenes increase their reactivity towards nucleophilic substitution reactions?
Which halogen compound in the following pair will react faster in \( \text{S}_\text{N}2 \) reaction and why? halogen compound in the following pair
Complete and balance the following chemical equations: \( 3 \text{MnO}_4^- + 4 \text{H}^+ \longrightarrow ? \)
\( \text{Cr}_2 \text{O}_7^{2-} + 14 \text{H}^+ + 6 \text{Fe}^{2+} \longrightarrow ? \)
State a condition under which a bimolecular reaction is kinetically a first-order reaction and give an example.
In a reaction, if the concentration of reactant \( X \) is tripled, the rate of reaction becomes twenty-seven times. What is the order of the reaction?
What type of deviation is shown by ethanol and acetone mixture ? Give reason. What type of azeotropic mixture is formed by that deviation ?
Define molal depression constant. How is it related to enthalpy of fusion?
Write the reactions of glucose with
(a) HI
(b)\((CH_3CO_2)O\)
Assertion (A): Boiling point of butan-1-ol is higher than that of butan-1-amine. Reason (R): Being more polar, butan-1-ol forms stronger intermolecular hydrogen bonds as compared to butan-1-amine.
Assertion (A): Phenol on reaction with aqueous NaOH gives sodium phenoxide.
Reason (R): This reaction supports the acidic nature of phenol.
Assertion (A): Rate of reaction decreases with increase in temperature. Reason (R): Number of effective collisions increases with increase in temperature.
Assertion (A): \( \Delta_{\text{mix}} H \) and \( \Delta_{\text{mix}} V \) are zero for an ideal solution. Reason (R): The solution which obeys Raoult’s law over the entire range of concentration is called an ideal solution.
Aniline on reaction with Bromine water gives:
Which of the following cells is used in hearing aids?
The half-life of a first-order reaction with a rate constant (\( k \)) of 3 min\(^{-1}\) is:
A 1% solution of solute ‘X’ is isotonic with a 6% solution of sucrose (molar mass = \( 342 \) g mol\(^{-1}\)). The molar mass of solute ‘X’ is:
‘Scurvy’ is caused by the deficiency of vitamin:
Which of the following compounds will not react with benzene sulphonyl chloride?
 
CH\(_3\)-O-CH\(_3\) when treated with excess HI gives:
Which of the following Grignard reagents will be used with methanol to prepare
Grignard reagents
Consider the following reaction:
benzyl alcohol (C6H5CH2OH)
The major product obtained is:
Which of the following elements of the 3d series of transition elements has the lowest \(\Delta_{a} H^\circ\)?
On adding AgNO\(_3\) solution to 1 mole of CoCl\(_3\)·4NH\(_3\), one mole of AgCl is precipitated. The secondary valency of Co is: