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

Give a reason for the following:
Ammonia is unionized in the gaseous state but in the aqueous solution, it is a weak electrolyte.

Name the cation that gives a white precipitate with dilute hydrochloric acid but is soluble in excess ammonia.

The following table shows the electronic configuration of the elements W,X,Y,Z :

Element	W	X	Y	Z
Electronic Configuration	2,8,1	2,8,7	2,5	1

Answer the following questions based on the table above:
What type of bond is formed between Y and Z.

Give two example in following case:
Gaseous non polar compounds

When gases react their volumes bear a simple ratio to each other, under the same conditions of temperature and pressure. Who proposed this gas law?

why is freshly prepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test?

The volume occupied by one mole of a gas at STP is.

Write equation for the following:
Burning of ammonia in oxygen.

Give reason for the following:
The blue colour of aqueous copper sulphate fades when it is electrolysed using platinum electrodes.

Write the observation for the following:
Moist starch iodide paper is put on the mouth of a test tube containing chlorine gas.