List of top Chemistry Questions

Polyethylene is obtained from calcium carbide. $CaC_{2} + 2H_{2}O \to Ca(OH)_{2} + C_{2}H_{2}$ $C_{2}H_{2} +H_{2} \to C_{2}H_{4}$ $ nC_{2}H_{4} \to $

Therefore, the amount of polyethylene obtained for $64 \,kg \,CaC_{2}$ is

Polyacrylonitrile is an example of

Polyblend is

Point out the incorrect statement

Point out the false statement

Point out the correct statement about $Zn-CuSO_4$ cel

pOH of water is 7.0 at 298 K. If water is heated to 350 K, which of the following should be true ?

Platinum black is

Planar structure is shown by

$pK_a$ of $CH_3COOH$ is 4.74. The pH of 0.01 M $CH_3COONa$ is

Pick out the ideal condition for $H_2SO_4$ manufactured by contact process

Photochemical smog is related to pollution of

Photochemical smog occurs in warm, dry and sunny climate. One of the following is not amongst the components of photochemical smog, identify it.

Phosphorus trioxide reacts with hot water to give

Phosphorus normally exhibits a covalency of

Phosphide ion has the electronic structure similar to that of

Phosphorus cannot form $PH_5$ with its outer electronic configuration as $3s^23p^3$ because

Phenol on heating with zinc dust gives

Phenol when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid gives

Phenol when treated with excess of bromine water gives a white precipitate of

Phenol has

Phenol on distillation with zinc dust gives

$PH_3$ the hydride of phosphorus is

Peroxy linkage is present in

Peroxide and super oxides of alkali metals are coloured because of