List of practice Questions

The number of unpaired electrons in $Mn^{2+}$ ion is
The average speed of $H_2$ at $T_1$ K is equal to that of $O_2$ at $T_2$ K. The ratio $T_1:T_2$ is
A sample of MgCO3 is dissolved in dilute HCl and the solution is neutralized with ammonia and buffered with NH4Cl / NH4OH. Disodium hydrogen phosphate reagent is added to the resulting solution. A white precipitate is formed. What is the formula of the precipitate?
XeF2, NO2, HCN, ClO2, CO2 Identify the non-linear molecule-pair from the above mentioned molecules.
The number of atoms in body-centred and face-centred cubic unit cell respectively are
The metal-pair that can produce nascent hydrogen in alkaline medium is:
The correct bond order of B-F bond in BF3 molecule is:
Sodium nitroprusside is:
Choose the correct statement for the [Ni(CN)4]²⁻ complex ion (Atomic no. of Ni = 28)
The boiling point of water is higher than liquid HF. The reason is that:
To a solution of colourless sodium salt, a solution of lead nitrate was added to have a white precipitate which dissolves in warm water and reprecipitates on cooling. Which of the following acid radical is present in the salt?
Oxidation states of Cr in K2Cr2O7 and CrO5 are, respectively:
Which of the following is radioactive?
The correct order of acidity of the following hydra acids is:
Hybridisation of the negative carbons in (1) and (2) are:
Hybridisation of the negative carbons
The correct relationship between molecule I and II is:
correct relationship between molecule I and II
The correct order of relative stability for the given free radical is:
The product of the following hydrogenation reaction is:
Pick the correct statement:
Let (Cms)H2 be the r.m.s speed of H2 at 150 K. At what temperature, the most probable speed of helium [(Cmp)He] will be half of (Crms)H2?
The correct pair of electron affinity order is:
The product of the following reaction is:
The above conversion can be carried out by:
Which of the statements are incorrect?
During the preparation of NH3 in Haber’s process, the promoter(s) used is/are: