List of top Chemistry Questions

The correct order of energy of absorption for the following metal complexes is $A :\left[ Ni ( en )_3\right]^{2+}$, $ B :\left[ Ni \left( NH _3\right)_6\right]^{2+}$, $C :\left[ Ni \left( H _2 O \right)_6\right]^{2+}$

The minimum energy in electron volt required to strip off ten times ionized sodium atom (i.e. Z = 11) of its last electron is

When $H_2O_2$ is added to an acidified $K_2Cr_2O_7$ solution

Mendius reaction involves the reduction of

Cheilosis and digestive disorders are due to the deficiency of

The first artificial disintegration of an atomic nucleus was achieved by:

A group of 13 element if added in small amounts to Ge, then the type of semiconductor formed is

The number and type of bonds between two carbon atoms in $CaC_2$ are

Oxygen does not form $OF_6$ because

The number of electrons lost or gained during the change $3Fe+4H_2O \rightarrow Fe_3O_4 + 4H_2$ is

Which is not in accordance to Aufbau principle?

Propyne molecule contains

Iodoform on heating with KOH gives

Compound having formula $C_8H_{10}$ forms two isomers $P$ and $Q$. On oxidation $P$ gives benzoic acid and $Q$ gives phthalic acid. The isomers $P$ and $Q$ are

Diamond is hard because

Caprolactam polymerises to give

Metallic lustre is explained by

The most commonly used reducing agent is

Bond angle is minimum for

Which of the following is most acidic?

Which of the following ligands form a chelate?

The sweetest artificial sugar among the following is

When $C_{2}H_{2}, CH_{4}$ and $C_{2}H_{4}$ pass through a test tube which have ammoniacal $Cu_{2}Cl_{2}$, find out which gas comes out unaffected from test tube?