11.5 Alcohols — Chemistry STD 10 — Question

Define roasting. Name an ore on which roasting is done. Give balanced equation.

(a) Why is pure acetic acid known as glacial acetic acid?
(b) What type of compound is formed by the reaction between acetic acid and an alcohol?

Under what conditions does ethane gets converted to Ethyl alcohol

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)

How is the passage of electricity through an electrolyte different from the passage of electricity through a copper wire?

What is passive iron?

Give two chemical tests to distinguish between ethane and ethyne .

Write sqauential observation for effect of heat on Lead carbonate.

Solution A is a strong acid.
Solution B is a weak acid.
Solution C is a strong alkali.
(i) Which solution contains solute molecules in addition to water molecules?
(ii) Which solution will give a gelatinous white precipitate with zinc sulphate solution? The precipitate disappears when an excess of the solution is added.
(iii) Which solution could be a solution of glacial acetic acid?
(iv) Give an example of a solution which is a weak alkali.

List 1 contains the meta ls I alloys (1, 2, 3, 4, 5 ) and list 2 contains their uses (A, B, C, D, E).

List 1 Metal/Alloy	List 2 Uses
1. Aluminium	A. Steel making
2. Lead	B. aeroplane wings
3. Brass	C. galvanizing
4. Iron	D. radiation shield
5. Zinc	E. electricaI fittings

Copy and complete the following table, write down the correct letter against the numbers representing metals. An answer may be used only once. The first has been done for you.

Metal	1	2	3	4	5
Use	B