List of top Chemistry Questions

A metal oxide has the formula $M_2O_3$. It can be reduced by $H_2$ to give free metal and water. $0.1596\, g$ of $M_2O_3$ required 6 mg of $H_2$ for complete reduction. The atomic mass of the metal is

Red P can be obtained from white P by

Which one of the following is the strongest base?

Which of the following is the strongest acid?

The ground state electronic configuration of chromium is

Nitrogen (I) oxide is produced by

The value of van derWaals' constant a for the gases $O_2, N_2$, $NH_3$ and $ CH_4$ are 1.360, 1.390,4.170 and $2.253L^2$ atm $mol^{-2}$ respectively. The gas which can most easily be liquefied is

Pauling's electronegativity values for elements are useful in predicting

The C- H bond distance is the longest in

Which of the following 0.1 M aqueous solution will have the lowest freezing point?

Calgon used as a water softner, is

Which of the following is the true structure of HO?

Which one of the following atoms will have the smallest size?

Which one of the following is the smallest in size?

The molecule which has pyramidal shape is

The most stable hydride is

Phosgene is a common name for

1 cc $N_2O$ at NTP contains

The oxidation state of Cr in $K_2Cr_2O_7 $ is

Which one of the following can exhibit cis-trans-isomerism?

Bleaching powder is obtained by the action of chlorine gas and

The ionisation energy of hydrogen atom is 13.6 eV, the ionisation energy of a singly ionised helium atom would be

The compound whose aqueous solution has the highest $P^H$ is

Hypo is used in photography to