List of top Chemistry Questions

The monomer of Teflon is

Ageing of skin, cataract and skin cancer are the result of

Which of the following is not a green-house effect gas?

The major component of biogas is

Which of the following is considered as high corrosive resistant material?

Demineralised water can be obtained by using

Which of the following is an elastomer?

The wrong statement about corrosion is

Buna-S is a polymer of monomers X and Y. If X is $CH_{2}=CH-CH=CH_{2}$ then what is Y?

An example for condensation polymer is

In a galvanic cell, electrons flow from

Which of the following is an example of non-electrolyte?

Which of following is responsible for temporary hardness of water?

Saturated solution of $KNO_{3}$ is used to make salt bridge because}

A 2 kg water sample contains 408 mg of $CaSO_{4}$ (M.wt=136). The hardness in terms of $CaCO_{3}$ equivalents (in ppm) is

The ratio of equivalent weights of $HNO_{3}$ and $H_{2}SO_{4}$ is

200 mL of 0.1 M NaOH is allowed to react completely with 100 mL of 0.1 M HCl and the solution is diluted to 1.0 L by adding water. The pH of the mixture is

Which of the following cannot act as a buffer?

A gaseous mixture contains 14 g of $N_{2}$, 8.0 g of $O_{2}$ and 8.0 g of $H_{2}$. Total number of molecules present in the mixture is ($N_{A}$ = Avogadro number) (At.wt; H=1, N=14, O=16)}

The mass of $Na_{2}CO_{3}$ (in g) (M.wt=106) present in 1.0 L of 0.05 M solution is

Identify the molecule in which central atom is not obeying the octet rule.

The number of electrons with magnetic quantum number $m_{l} = 0$ in chloride ion is

Atomic numbers of four elements A, B, C and D are (Z-1), (Z+2), Z and (Z+1) respectively. If Z=9, the type of bonding between A and B is

The n, l values possible for a sublevel with seven degenerate orbitals are respectively

In which of the following, the number of unpaired electrons is maximum?