Chemistry

Biotechnology is applied in the following except?

A. baking industry B. wine production C. production of antibiotics D. manufacture of soap Correct Answer: Option D D. manufacture…

6 years ago

When sodium hydroxide solution is added to a solution of zinc salt, the white precipitate formed redissolves in excess sodium hydroxide because

A. sodium is more reactive than zinc B. sodium hydroxide is a strong alkali C. zinc hydroxide is amphoteric D.…

6 years ago

Which of the following on burning in air contributes to acid rain?

A. Sulphur B. Magnesium C. Aluminium D. Zinc Correct Answer: Option A A. Sulphur

6 years ago

If 20 cm³ of distilled water is added to 80 cm³ of 0.50 mol dm‾³ hydrochloric acid, the concentration of the acid will change to?

A. 20 mol dm‾³ B. 0.40 mol dm‾³ C. 2.00 mol dm‾³ D. 5.00 mol dm‾³ Correct Answer: Option B…

6 years ago

A colourless, odourless liquid T, gives effervesce with sodium trioxocarbonate (IV) and a white precipitate with silver trioxonitrate (V) solution T is most probably?

A. sodium chloride solution B. barium chloride solution C. dilute trioxonitrate (V) acid D. dilute hydroxide is unstable Correct Answer:…

6 years ago

Which of the following is correct about both compounds show below? CH3CH2CH2OH; CH3CH2CH(OH)CH3

A. They have identical physical properties B. They are structural isomers C. Their general molecular formula is the same D.…

6 years ago

Which of the following needs to be hydrolysed before it shows reducing property?

A. Glucose B. Maltose C. Sucrose D. Fructose Correct Answer: Option C C. Sucrose

6 years ago

C8H18 will undergo the following reactions except?

A. cracking B. combustion C. substitution D. addition Correct Answer: Option D D. addition

6 years ago

Which of the following procedures is suitable for identifying the food colouring added to a pastry sample?

A. carry out some food tests B. examine the pastry sample under a microscope C. Do a chromotogram of the…

6 years ago