List of top Chemistry Questions

On addition of small amount of $KMnO_4$ to concentrated $H_2SO_4$, a green oily compound is obtained which is highly explosive in nature. Identify the compound from the following.

On addition of one mL solution of 10% NaCl to 10 mL gold solution in the presence of 0.025 g of starch, the coagulation is prevented because starch has the following gold numbers

Oleum is chemically known as

Of the following which is a step growth polymer

Of the following, the most stable hydride is

Of the group 13 elements, the element with lowest electronegativity is

Of the following a pair of isotopes is

Octane number is zero for

Nylon-66 is obtained from

Number of unit cells in 4 g of X (atomic mass = 40) which crystallises in bcc pattern is iNA - Avogadro number)

Nylon $6,6$ is obtained by condensation polymerisation of

Nylon-6 as compared to nylon 6, 6 has lower

Number of moles of $K_2Cr_2O_7$ reduced by one mole of $Sn^{2+}$ ions is

Number of nucleons in $D_2$ molecule is

Number of atoms in 558.5 g of Fe (At. mass of Fe= 55.85 g $mol^{_1}$) is

Number of electrons surrounding $Kr \, in \, KrF_2 \, is$

Number of angular nodes for $4d$ orbital is _________.

Noble gases are sparingly soluble in water due to

Noble gases are also known as aerogens because

Nitrogen is used to fill electric bulbs because

Nitrogen forms stable $N_2$ molecule but phosphorus is converted to $P_4$ from $P_2$ because

Nitrogen combines with metals to form

Nitric oxide acts as a reducing agent in the reaction

Nitrobenzene can be prepared from benzene by using a mixture of conc. $ {HNO_3}$ and conc. $ {H_2SO_4}$ in the mixture, nitric acid acts as a/an :

$NH_4OH$ is a weak base but it becomes still weakerin the aqueous solution of