List of top Chemistry Questions asked in AFMC

Permanent hardness of water can be removed by adding

Oxalic acid on heating with conc. $ H_2SO_4$ gives

Least volatile hydrogen halide is

In the complex ion $\left[ Co \left( NH _{3}\right)_{6}\right]^{3+}$, the $NH _{3}$ molecules are linked to the central metal ion by

Highest oxidation state of $Mn$ is present in

Bromine water reacts with $SO_2$ to form ?

$ Pb + Conc. HNO_3$ gives

At $18^{\circ}$C, the conductance of $H^+$ and $CH_3COO^-$ at infinite dilution are $315$ and $35\, mho\, cm^ 2\, eq^{-1}$ respectively. The equivalent conductivity of $CH_3COOH$ at infinite dilution is _____ $mho\,cm^ 2\,eq^{-1}$

Chemical formula of phosgene is

At room temperature, the eclipsed and staggered forms of ethane cannot be isolated because

If the supply of oxygen is limited, $ H_{2}S $ reacts with $ O_{2} $ to form

The $pH$ value of $1 \times 10^{-4} \,M \,NaOH$ solution is

In the balanced chemical reaction $IO^{-}_{3}+aI^{-}+bH^{+}\to cH_{2}O+ dI_{2}$ $a, b, c$ and $d$ respectively corresponds to

The substance with the highest calorific value is

Which of the following metal is correctly matched with its ore?

The reaction by which benzaldehyde is converted in benzyl alcohol, is

The abbreviation BOD stands for

The geometry of sulphate ion is

Which of the following orbital diagram violates Faults exclusion principle?

Which of the following is an aromatic compound?

In the following reaction, $C _{2} H _{5} OH + CH _{3} COOH \xrightarrow[- H _{2} O ]{\text { Conc. } H _{2} SO _{4}} CH_3COOC_2H_5 \,\,\,\, C_2H_5OH$ acts as

By which of the following processes, pure nitrogen gas is prepared?

$HCl $ molecule contains

Which represents the correct order of first ionisation potential of third period elements?

The $C-H$ bond distance is the longest in