List of top Chemistry Questions asked in OJEE

When 2.0 g of a non-volatile solute was dissolved in 90 gm of benzene, the boiling point of benzene is raised by 0.88 K. Which of the following may be the solute ?$(K_b\, for \,benzene = 2.53 K kg mol^{-1})$

Which is more acidic ?

Sucrose, a common sugar, is composed of

When methyl-t-butyl ether is formed ?

What is the pressure of 2 mole of $NH_3$ at 27$^\circ$C when its volume is 5 lit. in van der Waals equation (a = 4.17, b = 0 .03711)

N forms $NCl_3$ whereas P can form both $PCl_3$ and $PCl_5$. Why ?

The ionic strength of a solution containing 0.1 mole/kg of KCl and 0.2 mole/kg of $CuSO_4$ is

A gas can expand from 100 mL to 250 mL undera constant pressure of 2 atm. The work done by the gas is

How many electrons are involved in the oxidationby $KMnO_4$ in basic medium ?

How does the ionisation energy of 1st group elements vary ?

Which of the following is an example of ketohexose ?