List of top Chemistry Questions

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:
Sodium nitroprusside 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?
The correct bond order of B-F bond in BF3 molecule is:
Choose the correct statement for the [Ni(CN)4]²⁻ complex ion (Atomic no. of Ni = 28)
The number of atoms in body-centred and face-centred cubic unit cell respectively are
XeF2, NO2, HCN, ClO2, CO2 Identify the non-linear molecule-pair from the above mentioned molecules.
The metal-pair that can produce nascent hydrogen in alkaline medium is:
Avogadro's law is valid for
$1$ mL of water has $25$ drops. Let $N_A$ be the Avogadro number. What is the number of molecules present in $1$ drop of water? (Density of water = $1$ g/mL)
A metal ($M$) forms two oxides. The ratio $M:O$ (by weight) in the two oxides are $25:4$ and $25:6$. The minimum value of atomic mass of $M$ 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
Which of the following is the correct set of four quantum numbers ($n$, $l$, $m$, $s$)?
The de-Broglie wavelength ($\lambda$) for electron ($e$), proton ($p$), and He²⁺ ion ($\alpha$) are in the following order, Speed of $e$, $p$, and $\alpha$ are the same
The number of unpaired electrons in $Mn^{2+}$ ion is
How much solid oxalic acid (molecular weight $126$) has to be weighed to prepare $100$ mL of exactly $0.1$ N oxalic acid solution in water?
$C_6H_6(\text{liquid}) + \frac{15}{2} O_2(\text{gas}) \rightarrow 6 CO_2(\text{gas}) + 3 H_2O(\text{liquid})$ Benzene burns in oxygen according to the above equation. What is the volume of oxygen (at STP) needed for complete combustion of $39$ grams of liquid benzene?
What is the correct order of acidity of salicylic acid, 4-hydroxybenzoic acid, and 2,6-dihydroxybenzoic acid?
The enol form in which ethyl-3-oxobutanoate exists is
The correct order of relative stability of the given conformers of n-butane is
order of relative stability
The major product of the following reaction is $F_3C \rightarrow CH = CH_2 + HBr$
In Bohr's model of the atom, the radius of a hydrogen atom in the ground state is $r_1$ and the radius of a He+ ion in the ground state is $r_2$. Which of the following is correct?
How many monobrominated product(s) (including stereoisomers) would form in the free radical bromination of n-butane?

How many atoms are in a bcc unit cell?