Question

A. Tiek the correct options,
2. Valency of chlorine is Het is
a) 1
b) 2
c) 3
d) 4
3. Which of the following is not a basic radical
a) ammonium b) chromium c) Chloride d)platinum
5. Which of the following gases is evolved during the reaction of magnesium with sulfurie
acid
a) hydrogen
b) carbon dioxide c) nitrogen d) oxygen​

Answer 1

Answer:

valency of chlorine is het is 1

Answer 2

Answer:

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2.a) 1

Valency is defined as the combining capacity of atoms or molecules. It is obtained from the number of electrons present in the outermost shell of an atom. The atomic number of chlorine is 17 and the electronic configuration is 2, 8, 7. Therefore, the valency of chlorine is 1.

3.c) Chloride

Positively charged radicals are called a basic radical. Acid radicals are formed by removal of hydrogen ion (H+). Basic radicals are formed by the removal of hydroxide ion (OH–). Example: H2S04 loses one H+ ion to form HSO4– ion. Example: KOH loses OH– ion and becomes K+ ion.

Acidic radical are anions which are negatively charged. For example: SO42-, NO3¯, etc. Basic Radicals are cations which are positively charged. For example: Na+, Fe++, etc.

Basic Radical : Na+, Fe2+,Ag+, Al3+,Cr3+,Fe3+,Au3+,Co2+,Ni2+,Hg2+,Sn2+

5.a) Hydrogen

When magnesium metal is reacted with sulphuric acid, magnesium sulphate and hydrogen gas are formed with the evolution of heat.