UPSC Chemistry-Environmental Chemistry Set 1

Angora ✘ Rayon ✘ Nylon ✘ Polyester ✔

Ca3Al3O6 ✘ Ca3SiO5 ✘ Ca2SiO4 ✘ Ca3(PO4)2 ✔

H2SO4 ✘ HNO3 ✘ HF ✘ HCl ✔

It does not contain carbon ✘ It does not contain silicon ✘ It does not contain iron ✘ It does not contain calcium ✔

They act as a film-forming constituent ✘ They reduce the viscosity ✘ They prevent the polymerization and condensation ✘ They provide elasticity to the film and minimize its cracking ✔

Super phosphate ✘ Nitrolim ✘ Muriate of Potash ✘ Humus ✔

K2CO3,Sio2,CaCO3 ✘ K2CO3,SiO2,PbCO3 ✘ Na2CO3,SiO2,CaCO3 ✘ Na2CO3,SiO2,PbO ✔

Aluminium sulphate ✘ Copper sulphate ✘ Cobalt sulphate ✘ Nickel sulphate ✔

Nitrogen and limestone ✘ Calcium carbide and nitrogen ✘ Calcium carbide and carbon ✘ None of the above ✔

Glass ✘ Cement ✘ Paint ✘ Gun power ✔