When ferrous sulphate crystals are heated, the colour of the residue formed is __ (A) red (B) brown

Iron nails become reddish brown in colour and solution becomes green in colour.

A die has six faces that are numbered from 1 to 6, with one number on each face. Let us denote the red, white, and blue dices as R, W,...

(i) (a) The colour of copper sulphate crystals before heating is blue and turns after heating. (b) the liquid droplets are actually the water droplets. The source of water droplets is...

(a) Black hair (b) Brown hair (c) Black hair (Hybrid)

The colour of ferrous sulphate crystals is green. On heating, FeSO4.7H2O first decomposes to form anhydrous ferrous sulphate (FeSO4) which is white in colour.

(B) (i), (iv)

(C) irritating choking smell

A die has six faces that are numbered from 1 to 6, with one number on each face. Let us denote the red, white, and blue dices as R, W,...

(i) Green to white, then brown  (ii) Water  (iii) As of burning sulphur  (iv) Ferric oxide, sulphur dioxide, sulphur trioxide (v) Decomposition reaction

Iron absorbed by plants is Ferric