Chemistry

The intermediate product formed when ethanol is progressively oxidized to ethanoic acid with potassium heptaoxodichromate (IV) is?

A. butanal B. ethanal C. methanal D. propanal Correct Answer: Option B - ethanal

4 years ago

Hydrogen is readily released when dilute hydrochloric acid reacts with?

A. Cu B. Na C. Au D. Ag Correct Answer: Option B - Na

4 years ago

Which of the following polymers is suitable for packaging and electrical insulation?

A. polyamide B. polyethene C. polycarbonate D. polystyrene Correct Answer: Option D - polystyrene

4 years ago

The most important use of hydrogen is in the?

A. manufacture of ammonia B. manufacture of methyl alcohol C. manufacture of ethyl alcohol D. hydrogenation of oils Correct Answer:…

4 years ago

A red precipitate of copper (I) carbide is formed when ammonium solution of copper (I) chloride is introduced into?

A. CH3CH2CH2CH3 B. CH2 = CH - CH2CH3 C. CH3CH2 - C = CH D. CH3 - C = C…

4 years ago

Ordinary glass is manufactured from silica; CaCO3 and ________?

A. Na2CO3 B. K2CO3 C. K2SO4 D. NaHCO3 Correct Answer: Option A - Na2CO3

4 years ago

Which of these pairs are synthetic and natural macromolecules respectively?

A. Haemoglobin and nylon, creatine and polyethylene B. Nylon and polyethlene, creatine and Haemoglobin C. Nylon and creatine, polyethylene and…

4 years ago

The reaction of an alkene with hydrogen in the presence of catalyst is?

A. a substitution reaction B. an oxidation reaction C. a nucleophilic reaction D. an addition reaction Correct Answer: Option D…

4 years ago

An example of element that can catenate is?

A. bromine B. nitrogen C. chlorine D. carbon Correct Answer: Option D - carbon

4 years ago

Ethanol can easily be produced by?

A. fermentation of starch B. distillation of starch solution C. catalytic oxidation of methane D. destructive distillation of wood Correct…

4 years ago