Chemistry

Ethanol reacts with concentrated tetraoxosulphate (V) acid at a temperature above 170°C to form

A. ethanone B. ethene C. ethyne D. ethanal Correct Answer: Option B - ethene

5 years ago

2 – methyl propan-2-ol is an example of a?

A. primary alkanol B. secondary alkanol C. tertiary alkanol D. quaternary alkanol Correct Answer: Option C - tertiary alkanol

5 years ago

The saponification of an alkanoate to produce soap and alkanol involves?

A. dehydration B. esterification C. hydrolysis D. oxidation Correct Answer: Option C - hydrolysis

5 years ago

Carbohydrates are large molecules with the molecular formula Cx(H2O)y. In which of the following pairs is x not equal to y?

A. glucose and starch B. maltose and starch C. sucrose and fructose D. maltose and starch Correct Answer: Option B…

5 years ago

The isomers of C3H8O are?

A. 1 - propanol and 2 - propanol B. 1 - propanol and 1 - propanol C. 2 - propanol…

5 years ago

Alkanals can be distinguished from alkanones by the reaction with?

A. sudan lll stain B. starch iodide paper C. lithium tetrahydrido aluminate (lll) D. Fehling's solution Correct Answer: Option D…

5 years ago

Geometric isomerism can exist in?

A. hex-3-ene B. hexane C. prop-l-ene D. 3-methyl but -1-ene Correct Answer: Option A - hex-3-ene

5 years ago

Which of the following metals is the least reactive?

A. Pb B. Sn C. Hg D. Au Correct Answer: Option D - Au

5 years ago

A common characteristic between zinc and the other transition elements is the ability to?

A. have variable oxidation states B. from complex ions C. act as a catalyst D. from coloured ions Correct Answer:…

5 years ago

The purest from of iron which contains only about 0.1% carbon is?

A. pig iron B. wrough iron C. cast iron D. iron pyrite Correct Answer: Option B - wrough iron

5 years ago