Coal is called fossil fuel because : (1) In future coal will become completely exhausted (2) It was formed 300 million years ago (3) Fossils are obtained along with mining of coal (4) It was formed from the dead remains of living organisms
The action of cleaning of oily dirt by soap is based on ....... (1) solubility in water (2) hydrophilic property (3) hydrophobic property (4) presence of both hydrophilic and hydrophobic groups
The functional group in aldehyde is
(1) (2) (3) (4)
The allotrope of carbon in amorphous form among the following is ....... (1) Diamond (2) Graphite (3) Buckministerfullerene (4) Coal
An organic compound 'A' on treating with acidified potassium dichromate solution gives 'B' with molecular mass 60 gm/mol. 'A' on heating with conc. H2SO4 of 443 K produces a gas that decolourless bromine water. The compound A is
(1) n-propyl alcohol (2) iso-propyl alcohol (3) ethyl alcohol (4) acetaldehyde
Chemical formula of Teflon is- (1) (-CF2-CF2-)n (2) (3) (-CH2-CH2-)n (4) None
