Scientist who worked on diffusion of gases ?  A) Thomas Graham 

Ferdinand Magellan worked for Spain

C) Cavour – Mazzini – Garibaldi

(C) 15 -18 hours

Answer is (D) Idris

Correct option is D) All

Correct option is D) ii, iii

Group – A Group – B 1) Thomas Graham B) Diffusion of gases 2) Freddie Mercury & David Bowie C) Reverse osmosis 3) Osmosis D) Semipermeable membrane 4) Diffusion E) Opening of scent bottle 5) Solvent A) Water

C) higher speed, greater space

C) R1 and R2 

(d) Charles Babbage