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.
An organic compound containing 40.1% carbon and 6.6% hydrogen has an empirical formula of?
C2H4O2
C2H3O2
CH2O
CH3O
Correct answer is C
Carbon Hydrogen
40.1..........................6.67
(3.342) / (3.342).............(6.67) / (3.342)
1 1.9958
1 Ω 2
CH2O