List of top Chemistry Questions

$1$ 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
Avogadro's law is valid for
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?
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 $F_3C \rightarrow CH = CH_2 + HBr$
$C_6H_6(\text{liquid}) + \frac{15}{2} O_2(\text{gas}) \rightarrow 6 CO_2(\text{gas}) + 3 H_2O(\text{liquid})$ 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?
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?

Froth is a Solution of?

The first oxidation of a secondary alcohol is?

Dows process is used.

The highest oxidation state of manganese is?

The radius of the third bohr orbit for H2 is?

Which is the most unstable carbocation?

Which of the following is not a transition element?

Father of green chemistry is?

In an adiabatic expansion of a gas initial and final temperatures are T1 and T2 respectively then the change in internal energy of the gas is [R = gas constant, γ = adiabatic ratio]