Chemistry

Element X, with electronic configuration 2, 8, 2 and element Y with electronic configuration 2, 8, 7 are like to combine by?

A. metallic bonding B. covalent bonding C. electrovalent bonding D. dative bonding E. hydrogen bonding Correct Answer: Option C -…

5 years ago

If an element R belongs to the same group as sodium, an aqueous solution of ROH will?

A. be neutral B. be acidic C. be coloured D. have pH greater than 7 E. turn back litmus red…

5 years ago

An atom 17 protons, 17 electrons and 18 neutrons has a mass number of?

A. 17 B. 18 C. 34 D. 35 E. 52 Correct Answer: Option D - 35

5 years ago

Lead and tin are the components of?

A. steel B. bronze C. brass D. dentist amalgam E. soft solder Correct Answer: Option E - soft solder  

5 years ago

Which of the following is an ore of aluminium?

A. Haematite B. Magnetite C. Siderite D. Bauxite E. Cassiterite Correct Answer: Option D - Bauxite

5 years ago

Which of the following metals is not extracted by electrolysis?

A. lron B. Sodium C. Calcium D. Magnesium E. Aluminium Correct Answer: Option A - lron

5 years ago

The use of diamond in abrasives is due ti its?

A. high melting point B. durability C. lustre D. hardness E. octahedral shape Correct Answer: Option D - hardness

5 years ago

Which of the following is used widely in the manufacture of flavours and perfumes?

A. Alkanoates B. Alkanones C. Alkanes D. Complex sugars E. Aliphatic compounds Correct Answer: Option A - Alkanoates

5 years ago

Alkanes react with the halogens mainly by?

A. oxidation B. polymerization C. addition D. reduction E. substitution Correct Answer: Option E - substitution

5 years ago

The by-product of the fermentation of sugar to ethanol is?

A. propane -1,2,3-triol B. ethyl ethanoate C. ethanedioc acid D. propanol E. carbon (lV) oxide Correct Answer: Option E -…

5 years ago