List of top Chemistry Questions

Which of the following statements about primary amines is false ?

Which of the following species is not electrophilic in nature ?

A $0.66\, kg$ ball is moving with a speed of $100 \,m/s$. The associated wavelength will be $(h = 6.6 \times 10^{-34} \, Js)$

An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to

Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by

Consider the following relations for emf of a electrochemical cell : (a) emf of cell = (Oxidation potential of anode) - (Reduction potential of cathode) (b) emf of cell = (Oxidation potential of anode) + (Reduction potential of cathod) (c) emf of cell = (Reduction potential of anode) + (Reduction potential of cathode) (d) emf of cell = (Oxidation potential of anode) - (Oxidation potential of cathode) Which of the above relations are correct ?

What does the electronic configuration $ 1s^2, \, 2s^2, \, 2p^ 5 , \, 3s^1 $ indicate ?

The density of glycerol is higher than propanol due to

Which type of dyes are not used do dye nylon and polyester fibres?

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

Compound that has smell of bitter almonds is

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

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

Which of the following orders regarding ionization energy is correct ?

In hemoglobin the metal ion present is

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 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

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

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 -