Biotechnology is applied in the following except
baking industry
wine production
production of antibiotics
manufacture of soap
Correct answer is D
No explanation has been provided for this answer.
20 mol dm-3
0.40 mol dm-3
2.00 mol dm-3
5.00 mol dm -3
Correct answer is B
From M1V1 = M 2
V2; m 1 = 0.50 mol dm-3; m2 = ?; v1 = 80cm 3 = 100cm3
:. m2 = m1v2/v2 = 0.50 x 80/100 = 0.40 mol dm-3
Which of the following on burning in air contributes to acid rain?
Sulphur
Magnesium
Aluminium
Zinc
Correct answer is A
No explanation has been provided for this answer.
sodium is more reactive than zinc
sodium hydroxide is a strong alkali
zinc hydroxide is amphoteric
zinc hydroxide is unstable
Correct answer is C
No explanation has been provided for this answer.
sodium chloride soluttion
barium chloride solution
dilute trioxonitrate (V) acid
dilute hydrochloric acid
Correct answer is D
Take an unknown substance and add a few drops of it to the silver nitrate solution. If the silver nitrate solution turns white due to the formation of silver chloride, the acid is hydrochloric acid. If the solution remains clear, the acid is nitric acid. T is Hydrochloric Acid(an odorless, colorless solution with a pungent smell)