List of top Chemistry Questions

For a reaction between gaseous compounds, $\hspace20mm 2A + B \longrightarrow C + D$ the reaction rate = k[A][B]. If the volume of the container is made $\frac{1}{4}$ of the initial, then what will be the rate of reaction as compared to the initial rate?

The density of glycerol is higher than propanol due to

Select the detergent that is used to prepare cosmetics.

Compound that has smell of bitter almonds is

Ethyl alcohol cannot be used as a solvent for methyl magnesium iodide because

Which one of the following is employed as a tranquilizer drug ?

Which of the following orders regarding ionization energy is correct ?

When a manganous salt is fused with a mixture of $KNO_3$ and solid $NaOH$ the oxidation number of $Mn$ changes from $+2$ to

In hemoglobin the metal ion present is

Nitrobenzene can be converted into azobenzene by reduction with

Enthalpy of a compound is equal to its

Compound formed by electrolysis of a mixture of ethanol and NaCl is

A solution of sucrose (molar mass = $342 \,g \,mol^{-1}$) has been prepared by dissolving $68.5 \,g$ of sucrose in $1000 \,g$ of water. The freezing point of the solution obtained will be ($K_f$ for water = $1.86 \, K \, kg \, mol^{-1}$)

$AB$ crystallizes in a body centred cubic lattice with edge length 'a' equal to $387 \,pm$. The distance between two oppositely charged ions in the lattices is

Which of the following converts $CH_3CONH_2$ to $CH_3NH_2$ ?

Which of the following is a Gattermann aldehyde synthesis?

Which of the following does not exihibit the phenomena of mutarotation?

Some of the properties of the two species, $NO_3^-$ and ${H_3O^+}$ are described below. Which one of them is correct?

In the following reaction sequence, $ \ce{CH3CHO ->[Cl_2][Ca(OH)_2] X ->[C_6H_5NH_2][Alc. KOH] Y}$ $Y$ is

A white crystalline salt $A$ reacts with dilute $HCl$ to liberate a suffocating gas $B$ and also forms a yellow precipitate. The gas $B$ turns potassium dichromate acidified with dilute $H_2SO_4$ to a green coloured solution $C, A, B$ and $C$ are respectively

$0.023\, g$ of sodium metal is reacted with $100 \,cm^3$ of water. The pH of the resulting solution is ______

Oxidation states of $P$ in $ H_4 \, P_2 \, O_5, H_4, P_2, O_6 , H_4 P_2 O_7 $ respectively are

The rate of the reaction $ {2NO + Cl_2 -> 2NOCl}$ is given by the rate equation rate = $ { k[NO]^2[Cl_2]}$ . The value of the rate constant can be increased by -

Which one of the following does not involve coagulation?

$ N_{2} $ gas will not be evolved upon reaction of $ HNO_3$ with which of the following amines?