Ferrous sulphate (${\mathrm{FeSO}}_4·7{\mathrm{H}}_2\mathrm{O}$) is known as

• vermillion

• Glauber's salt

• green vitriol

• Siderite

1312.

PCl₃ and cold water reacts to produce which of the following?

• H₃PO₃

• H₃PO₂

• H₄P₂O₇

• H₃PO₄

Which phosphorus reacts with KOH solution to produce phosphene gas?

• White phosphorus

• Red phosphorus

• Both (a) and (b)

• None of these

I₂ dissolves in KI solution due to the formation of :

• KI₂ and I^-

• K⁺, I^- and I₂

• I${}_3^{-}$

• None of these

What are the products obtained when ammonia is reacted with excess chlorine ?

• N₂ and NCl₃

• N₂ and HCl

• N₂ and NH₄Cl

• NCl₃, and HCl

Reaction of HNO₃ with I, S, P and C gives respectively

• HIO₃, H₂SO₄, H₃PO₄, and CO₂

• HIO₃, H₂SO₃, H₃PO₄, and CO₂

• HIO₂,H₂SO₄, H₃PO₄, and CO

• I₂O₅, SO₂, P₂O, and CO₂

Which of the following is anhydride of perchloric acid ?

• Cl₂O₇

• Cl₂O₅

• Cl₂O₃

• HClO

Dry bleach is done by

• O₃

• H₂O₂

• Cl₂

• SO₂

Which of the following sulphides is yellow in colour?

• CuS

• CdS

• ZnS

• CoS

Red P can be obtained by white P by

• Heating it with a catalyst, in an inert atmosphere

• Distilling it in an inert atmosphere

• Dissolving it in CS₂ and crystallizing

• Melting it and pouring the liquid into water