Study of Compounds-I Hydrogen Chloride — Chemistry STD 10 — Question

Arrange the following as per instruction given in the bracket.
Mg, Cl, Na, S, Si (decreasing order of atomic size)

(a) How does the atomic radius change in a period?
(b)

Element	P	Q	R
Atomic radius	1.86 A	2.31 A	1.52 A

Arrange the elements in the table above, such that the least metallic element comes first and the most metallic element comes last.

Calculate the relative molecular mass of Chloroform.
(use K = 39, Cl = 35.5, O = 16, C = 12, H = 1, Na = 23, N = 14, S= 32)

Give the reaction of acid with Chlorides
State the conditions under which they react.

You have been provided with three test tubes. One of them contains distilled water and the other two have an acidic solution and a basic solution respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?

One chemical test that would enable you to distinguish between the following pair of chemicals. Describe what happens with each chemical or state no visible reaction.
Sodium sulphate solution and sodium chloride solution.

Which element from the following has the highest ionization energy?
Explain your choice.
Ne, He, Ar

(a) Why do the molecules of oxygen have a double covalent bond in between their atoms?
(b) Why do the molecules of nitrogen have a triple covalent bond between their atoms?

What is the special feature of the structure of (i) ethane (ii) ethyne

Write a balanced chemical equation : when hot and concentrated sulphuric acid reacts with the following :
Sulphur