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
Which of the following does not contain silicon?
Kaoline
Agate
Ruby
Quartz
C.
Ruby
Ruby is mineral of aluminium ie, Al2O3. It does not contain silicon.
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
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