List of top Chemistry Questions

The rubber, used for manufacturing tyres is vulcanised with

Which of the following will increase with the increase in temperature ?

The $C-C$ bond dissociation energy in kcal/mol is

Propan-2-ol + ethanoic acid $ \xrightarrow{{}} $

This metal is extracted from its ore by formation of a cyanide complex

The following is a coordination compound of iron

The compound that can exhibit geometrical isomerism is

The process of conversion of ozone into oxygen $\left(2O_{3} \longrightarrow 3O_{2}\right)$ involves following steps $O _{3} {<=>[{\text { Fast }}]} O _{2}+ O$ $O + O _{3} {->[{\text { Slow }}]} 2 O _{2}$ The rate law expression for this process is

Which of the following acts as a reducing agent to reduce $ W{{O}_{3}},Mo{{O}_{3}} $ and $ Ge{{O}_{2}} $ into metals?

Chlorination of which of the following substance is a substitution reaction?

Dissolution of ammonium chloride in water leads to a cooling sensation. At constant temperature, this process is accompanied by

Natural rubber is

Consider the following hypothetical reaction. $A+B \rightleftharpoons C+D ; \,\,\,K_{c}=1 \times 10^{-4}$ Which of the following statements is true for this reaction ? In this reaction,

Which of the following carbocations will be most stable ?

In the change of $NO \, \to\, NO^+$ the electron is added to

In $Cu$-ammonia complex, the state of hybridization of $Cu^{+2}$ is

For the Paschen series the values of $n_{1}$ and $n_{2}$ in the expression $\Delta E=Rhc\left(\frac{1}{n_{1}^{2}}-\frac{1}{n_{2}^{2}}\right)$ are

For making distinction between $2$-pentanone and $3$-pentanone the reagent to be employed is

"Electron" is an alloy of

The lock and key model of enzyme action illustrates that a particular enzyme molecule

The effectiveness of an enzyme is affected least by

It is believed that atoms combine with each other such that the outermost shell acquires a stable configuration of $8$ electrons. If stability were attained with $6$ electrons rather than $8$; what would be the formula of the stable fluoride ion?

In the change of $NO \, \to\, NO^+$ the electron is added to

Which of the following reactions will not result in the formation of carbon-carbon bonds ?

The value of electronegativity of /atoms $A$ and $B$ are $1.2$ and $4.0$ respectively. The $\%$ ionic character of the $A - B$ bond is