Periodic Properties And Variation Of Properties Physical And Chemical — Chemistry STD 10 — Question

A substance added to an ore to get rid of earthly impurities, during the formation of a fusible compound is called

Organic compounds which has same molecular formula, but different structural formula are called:

Assertion (A): Freshly prepared ferrous sulphate solution is used in the brown ring test.
Reason (R): On exposure to air, ferrous sulphate gets oxidised to ferric sulphate and does not react with NO.

Hydrogen chloride gas being highly soluble in water is dried by

Which is not the property of a covalent compound?

Some amount of copper turnings is heated with conc. sulphuric acid when a colourless gas is evolved. The gas on passing through acidified potassium dichromate solution, turns it :

An aqueous solution of a compound sodium hydroxide reacts with :
P Aqueous zinc sulphate to form a white precipitate which dissolves when sodium hydroxide is in excess,
Q Aluminium sulphate solution to form a white precipitate which is insoluble when sodium hydroxide is in excess.
Which statements are correct?

The colour of pH paper in odourless solution of pH 7 is:

The metallic character __________ in a period as one moves from left to right.