For synthesis of 1-butene, CH3MgI should be treated with
propene
2-chloropropene
allyl chloride
ethyl chloride
Corrosive sublimate (HgCl2) can be used distinguish between
formic acid and acetic acid
acetaldehyde and butanone
formaldehyde and propanone
All of the above
The amount of silver deposited on passing 2 F of electricity through aqueous solution of AgNO3
54g
108g
216g
324g
Peptization denotes
digestion of food
hydrolysis of proteins
breaking and dispersion into colloidal state
precipitation of solid from colloidal dispersion
Blue colour of water in sea is due to
refraction of blue light by impurities
refraction blue sky by water
scattering of light by water
None of the above
C.
scattering of light by water
The colour of a colloidal solution depends on the wavelength of the light scattered by the dispersed particles, which in tum depends on the size and the nature of particle. The colour of water in sea is blue due to the scattering of light by water.
A certain nuclide has a half-life period of 30 min. If a sample containing 600 atoms is allowed to decay for 90 min, how many atoms will remain ?
200 atoms
450 atoms
75 atoms
150 atoms