List of top Chemistry Questions

Cycloalkane formed when $1, 4$ -dibromopehtane is heated with Sodium is

Conversion of benzene to acetophenone can be brought by

Intramolecular Hydrogen bonding is formed in

Excess of $PCl_5$ reacts with conc. $H_2SO_4$ giving

$ Ca{{(HC{{O}_{3}})}_{2}}(s) $ decomposes as $ Ca{{(HC{{O}_{3}})}_{2}}(s)\xrightarrow[{}]{{}}CaC{{O}_{3}}(s)+{{H}_{2}}O(g) $ $ +C{{O}_{2}}(g) $ Total pressure at equilibrium is found to be 0.12 bar. Thus, $ {{K}_{p}} $ is

100 mL of N/5 HCl was added to 1 g of pure $ {CaCO_3}$ What would remain after the reaction?

The ratio of number of oxygen atoms (O) in 16.0 g ozone $(O_3), \,28.0\, g$ carbon monoxide $(CO)$ and $16.0$ oxygen $(O_2)$ is (Atomic mass: $C = 12,0 = 16$ and Avogadro?? constant $N_A = 6.0 x 10^{23}\, mol^{-1}$)

$100\, mL$ of $0.1\, M$ acetic acid is completely neutralized using a standard solution of $NaOH$.The volume of Ethane obtained at $STP$ after the complete electrolysis of the resulting solution is

The function of potassium ethyl xanthate in froth floatation process is to make the ore

Bond order of $1.5$ is shown by:

The pOH value of a solution whose hydroxide ion concentration is $6.2 \times 10^{-9}$ mol/litre is

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

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

If the radius of $H$ is $0.53\, ? $, then what will be the radius of $_3Li^{2+}$ ?

The preparation of ethyl acetoacetate involves:

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

Which of the following does not have valence electron in $3d$-subshell?

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

The reaction, $SO _{2}+ Cl _{2} \longrightarrow SO _{2} Cl _{2}$ is exothermic and reversible. $A$ mixture of $SO _{2}( g ), Cl _{2}( g )$ and $SO _{2} Cl _{2}(l)$ is at equilibrium in a closed container. Now a certain quantity of extra $SO _{2}$ is introduced into the container, the volume remaining the same. Which of the following is/are true?

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

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 ?

Which alkene on ozonolysis gives \(CH_3CH_2CHO\) and

An ideal gas can?t be liquefied because

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

Which of the following combinations would not result in the formation of a buffer solution?