A balanced chemical equation obeys the law of?
conservation of mass
difinite proportions
multiple proportions
conservation of energy
Correct answer is A
No explanation has been provided for this answer.
Which of the following substances is a mixture?
Sulphur powder
Bronze
Distilled water
Ethanol
Correct answer is B
Bronze is a mixture of copper and tin. Water is a compound of the elements hydrogen and oxygen.
An example of a polysaccharides is?
dextrose
mannose
glucose
starch
Correct answer is D
No explanation has been provided for this answer.
Alkanals can be differentiated from alkanones by reaction with?
2,4-dinitrophenylhydrazine
hydrogen cyanide
sodium hydrogen sulphite
Tollen's reagent
Correct answer is D
No explanation has been provided for this answer.
The characteristics reaction of carbonyl compounds is?
substitution
elimination
addition
saponfication
Correct answer is C
No explanation has been provided for this answer.