The synthetic detergents are preferred to soap for laundry using hard water because?
detergents are water soluble while soap is not
the calcium salts of detergents are water soluble
the magnesium salt of soap is soluble in hard water
soap does not have a hydrocarbon terminal chain
Correct answer is B
No explanation has been provided for this answer.
teflon
isoprene
polythene
neoprene
Correct answer is D
No explanation has been provided for this answer.
The final product of the reaction of ethyne with hydrogen iodine is?
CH3—CHI2
CH2l—CH2I
CH3—CI3
CH2 = CHI
Correct answer is A
1,1-Diiodoethane ( CH3-CHI2 ) is a product of this reaction
alkanal
alkanoate
alkanone
alkyne
Correct answer is B
No explanation has been provided for this answer.
An undesirable paraffin in the petroleum industry which is particularly prone to knocking is?
iso-octane
n-heptane
iso-heptane
n-octane
Correct answer is B
No explanation has been provided for this answer.