A.Limestone

B.Silica Clay

C.Gypsum

D.Ash

A.C, Fe, B

B.C, N, P

C.N, P, K

D.Mg, Zn, Fe

A.It increases the 

B.P of petrolB.Increases the aniti-knocking rating

C.Decreases the B.P of petrol

D.Decreased the ani-kncking rating

A.CS₂

B.CHCl₃

C.CH₃Cl

D.CCl₄

A.Acid Plants

B.Paints

C.Wood Burning

D.Domestic Sewage

A.SO₂

B.CO₂

C.NO₂

D.CO

A.Water vapour

B.Ozone

C.Aerosols

D.CFC

A.Yello

B.Green

C.Blue

D.Red

A.decreases

B.increases

C.remains the same

D.uncertain

A.the sum of the number of neutrons and protons

B.always more than the atomic weight

C.always less than its atomic number

D.None of these