Question

) (i) The most electronegative element from the following is
(a) Magnesium (b) Sulphur (c) Aluminium (d) Chlorine
(ii) The salt solution which does not react with ammonium hydroxide is
(a) Calcium nitrate (b) Zinc nitrate (c) Lead nitrate (d) Copper nitrate
(iii) A chloride which forms a precipitate which is soluble in excess of ammonium hydroxide is
(a) Copper chloride (b) Calcium chloride (c) Ferrous chloride (d) Ferric chloride
(iv) Which of the following is the common characteristic of covalent compound?
(a) High melting point (b) Consists of molecules (c) Always soluble (d) Conducts electricity in molten
in water state

Answer 1

Answer:

i. d. chlorine

ii. a. Calcium Nitrate

iii. a.Copper chloride

iv. b. consists of molecule

Answer 2

Answer:

Explanation:

1)(d)chlorine

2)copper nitrate is the solution with doesn't react with Na4OH..

3)The white precipitate dissolves when excess of ammonium hydroxide is added. When ammonium hydroxide is added to calcium nitrate solution, no visible reaction occurs even with the addition of excess of NH4OH. 6. When sodium hydroxide is added to Iron (II) chloride, dirty green precipitate of Fe(OH)2 is formed.

4)Properties of covalent compounds include:

Low boiling points and melting points.

Various colors.

Properties of covalent compounds include:

Low boiling points and melting points.

Various colors.

Poor conductors of heat and electricity.

Brittle solids.