Study of Sulphur Compound Sulphuric Acid — Chemistry STD 10 — Question

A metal which is a liquid at room temperature.

Elements Q and S react together to form an ionic compound. Under normal conditions, which physical state will the compound QS exist in?

What is a Homologous series?

Write the colour of the following salt : Cupric salts.

The following table shows the tests a student performed on four different aqueous solutions which are X,Y,Z and W. Based on the observations provided, Identify the cation present

Chemical Test	Observation	Conclusion
To Solution X, ammonium hydroxide is added in minium quantity first and then in excess	A dirty white precipitate is formed which dissolves in excess to form a clear solution	(i)
To Solution Y, ammonium hydroxide is added in minimum quantity first and then in excess	A pale blue precipitate is formed which dissolves in excess to form a clear inky blue solution	(ii)
To solution W, A small quantity of sodium hydroxide solution is added and then in excess	A white precipitate is formed which remains insoluble	(iii)
To a salt Z, calcium hydroxide solution is added and then heated	A pungent smelling gas turning moist red litmus paper blue is obtained	(iv)

Name of the first member of alkyne series.

Give the various applications of organic chemistry ?

Give the name and formula of an ore of zinc.
What in addition to a zinc compound, is put into the furnace? State one large scale use of zinc.

Write the equation for the following : Ammonium chloride is treated with sodium hydroxide.