List of top Chemistry Questions asked in BITSAT

Which of the following is process used for the preparation of acetone?

In the reaction $3 Br _{2}+6 CO _{3}^{2-}+3 H _{2} O \longrightarrow 5 Br ^{-}+ BrO _{3}^{-}+6 HCO _{3}^{-}$

$0.45 \,g$ of acid molecular weight $90$ is neutralised by $20\, ml$ of $0.5\,N$ caustic potash. The basicity of acid is

When chlorine water is exposed to sunlight, $O_2$ is liberated. Hence,

Which alkene on ozonolysis gives \(CH_3CH_2CHO\) and

In which of the following reactions, standard entropy change $(\Delta S^{\circ})$ is positive and standard Gibb?s energy change $(\Delta G^{\circ})$ decreases sharply with increasing temperature ?

Formation of ozone in the upper atmosphere from oxygen takes place by the action of

Bond enthalpies of $H_2, X_2$ and $HX$ are in the ratio $2 : 1 : 2$. If enthalpy of formation of $HX$ is $-50 \,kJ \,mol^{-1}$, the bond enthalpy of $H_2$ is

In which case the $NO_2$ will attack at the meta position

The preparation of ethyl acetoacetate involves:

Complete hydrolysis of cellulose gives

Number of atoms of $He$ in $100$ amu of $He$ (atomic wt. of $He$ is $4$) are :

The boiling point of water is exceptionally high because

Which of the following is soluble in yellow ammonium sulphide?

The boiling point of water is exceptionally high because

A synthetic rubber which is resistant to the action of oils, gasoline and other solvents is

$K _{ b }$ for water is $0.52\, K / m$. Then $0.1 \,m$ solution of $NaCl$ will boil approximately at:

In which of the following molecules $S$ atom does not assume $sp ^{3}$ hybridsation?

Which of the following does not contain any coordinate bond?

This reaction is called

Which anion is the weakest base?

$1 \,g$ of $U -235$ is converted into $UF _{6}$. The radioactivity of $UF _{6}$ thus obtained is :

The well known urinary antiseptic urotropine is formed when formaldehyde reacts with

For the reaction, $N _{2}( g )+3 H _{2}( g ) \rightleftharpoons 2 NH _{3}( g )$, the unit of $K$ is :

$1 \,L$ of a gas is at a pressure of $10^{-6} \, mm$ of Hg at $25^{\circ} C$. How many molecules are present in the vessel?