List of top Chemistry Questions

Orthoboric acid -
Orthoboric acid when heated to red hot gives
Ortho and para hydrogen differ
Organomercury compounds are
Ordinary glass is :
Ordinary water is not used as a moderator in nuclear reactors because
Order of size of $sp, sp^2$ and $sp^3$ orbitals is
Oppaneuer oxidation is the reverse process of
One of the following is a Bronsted acid but not a Bronsted base
One of the acid listed below is formed from $P_2O_3$ and the rest are formed from $P_2O_5$. The acidformed from phosphorus (III) oxide is
One of the following cannot be prepared by Kolbe's electrolytic process ?
One mole of an ideal gas undergoes a cyclic process $ ABCDA $ as shown in the $ P-V $ diagram, Tire net work done in the process is $ (1\, atm = 10^6 $ dyne $ cm^{-2} $ )
One mole of magnesium in the vapour state absorbed 1200 kJ of energy. If the first and second ionization energies of magnesium are 750 and 1450 $kJ mol^{-1}$ respectively, the final composition of the mixture is
One mole of a perfect gas expands isothermally to tentimes its original volume. The change in entropy is
One mole of $1$,$2$-dibromopropane on treatment with $X$ moles of $NaNH_2$ followed by treatment with ethyl bromide gave a $2$-pentyne. The value of $X$ is
One gas bleaches the colour of flowers by reduction and another gas by oxidation. The gases respectivelyare
One can obtain a silica garden if
One among the following is an example of ferroelectric compound. It is
On the basis of structure, the oxidation of two Cl atoms in $CaOCl_2$ respectively are
On the basis of structure, the two sulphur atoms in $ {Na_2S_2O_3}$ have
On hydrolysis, diborane produces
On passing 3 ampere of electricity for 50 minutes,1.8 g of metal deposits. The equivalent mass ofmetal is
On sulphonation phenol gives two products, ortho and para phenol sulphonic acids. The variation in products depend upon
On heating a mixture of $NH_4Cl\, and\, KNO_2$, we get
On heating ammonium dichromate and barium azide separately we get