Hypo which is used in photography, chemically called?
(A) Silver Bromide
(B) sodium thio sulfate
(C) sodium phosphate
(D) sodium nitrate
Which element forms the maximum number of compounds with hydrogen?
(A) Oxygen
(B) Silicon
(C) Carbon
(D) Nitrogen
What is the smallest unit of a chemical compound?
(A) Atomic
(B) electron
(C) Proton
(D) Molecules
Filling helium in balloons is considered more useful than hydrogen, because?
(A) it is cheap
(B) less heavy
(C) more flying ability
(D) it does not form explosive mixture with air
Gun powder is a mixture of?
(A) soil and TNT
(B) sulphur, clay and charcoal
(C) saltpeter, sulfur and charcoal
(D) TNT and charcoal
The marshy gas which is produced on decomposition of organic matter and is mostly found in coal mines, is the name of that gas?
(A) ethane
(B) Methane
(C) carbon dioxide
(D) carbon monoxide
Why is sodium stored in kerosene?
(A) To maintain in its original form
(B) It gets oxidised in air
(C) evaporation starts in the air
(D) it starts burning in air
Which acid is used in making battery?
(A) sulfuric acid
(B) nitric acid
(C) hydrochloric acid
(D) acetic acid
Which substance is added to make natural rubber hard and bouncy?
(A) Petrol Jelly
(B) sulfuric acid
(C) sulfur
(D) Sponge
Which of the following is essentially produced in the fermentation process?
(A) ethyl alcohol
(B) Methyl alcohol
(C) acetic acid
(D) yeast
Get the Examsbook Prep App Today