Question

Many useful substances are obtained from petroleum. These are termed as

„Petrochemicals‟. These are used in the manufacture of detergents, synthetic fibres and

man-made plastics. Hydrogen gas obtained from natural gas is used in the production of

fertilisers. Due to its great commercial importance, petroleum is also called „black gold’.

Light gases are the topmost fraction, followed by petrol and kerosene. Diesel is the

heaviest. The other heavier fractions are not useful and are usually used to

make asphalt to surface roadQ15.“The basic process of crude refining is done by Fractional Distillation”.

(a) TRUE (b) False

Q16.Check the statements for their validity:

(W) Boiling Point of petroleum fractions lies between 250C – 3500C.

(X) Petrol has high Boiling Point than Kerosene.

(Y) Kerosene is volatile compared to Diesel.

(Z) Diesel and Petrol (Gasoline) has same size of molecules.

Choose the option for correct statements:

(a) Only Y

(b) Only W and Y

(c) Only W, X and Y

(d) Only Y and Z

Q17.Choose the option which is not a petroleum product:

(a)Gold (b)Urea ( a type of organic fertilizer)

(c)Naptha (d) Nylon (a synthetic fibre)​

Answer 1

Answer:

only Y. true like karo. gays

Answer 2

Answer:

false feet of the amoeba is called as psuedopodia .It helps in capturing the food and for locomotion in amoeba .