List of practice 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

Polymerisation of propene using Ziegler-Natta catalyst is advantageous over free radical polymerisation because

Polystyrene is an example of

Polyacrylonitrile is an example of

Polyarch vascular bundles generally occur in

Polyblend is

Polycistronic messenger $ RNA (mRNA)$ usually occurs in

Polydactyly is

Points $ P $ , $ Q $ and $ R $ are in a vertical line such that $ PQ = QR $ . A ball at $ P $ is allowed to fall freely. The ratio of times of descent through $ PQ $ and $ QR $ is

'POISE' is the

Pollenkitt is present in pollen grains of

Pollutants released from iron and steel industry are

Point out the correct set of diamagnetic substances

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

Point out the false statement

Point out the incorrect statement

Plutonium decays with half life of $24000$ years. If plutonium is stored for $72000$ years, the fraction of it that remains is

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

Plasmogamy takes place in Basidiomycetes by this method

Platinum black is

Plerome produces

Planar structure is shown by

Plant cells differ from animal cells in having

Plants required which one of the following for the formation of ATP?

Plasmid used to construct the first recombinant $DNA$ was isolated from which bacterium species?