List of top Chemistry Questions on Occurrence Of Metals

Given below are two statements: one is labelled as Assertion A and other is labelled as Reason R.
Assertion A : Finest gold is red in colour, as the size of the particles increases, it appears purple then blue and finally gold.
Reason R : The colour of the colloidal solution depends on the wavelength of light scattered by the dispersed particles.
In the light of the above statements, choose the most appropriate answer from the options given below.

Match List-I with List-II.

	List I		List II
A.	Concentration of	i	Aniline
B.	Leaching of alumina	ii	NaOH
C.	Froth stabilizer	iii	\(SO_2\)
D.	Blister copper	iv	NaCN

Choose the correct answer from the options given below.

The correct statement(s) related to the metal extraction processes is(are)

The non-metal present in IVA (carbon family) is

A metal crystallises in face centred cubic structure with metallic radius 2​A∘. The volume of the unit cell (in m³) is

Silicon doped with gallium forms

Which one of the following is a mineral of iron?

Heating of carbonate ore in absence of air is called

Match the following

a	Haematite	i	\(HgS\)
b	Cinnabar	ii	\(Fe_3O_4\)
c	Hornsilver	iii	\(Fe_2O_3\)
d	Magnetite	iv	\(AgCl\)

General formula of solid in zinc blende structure is:

The common impurity present in bauxite is

Thermal decomposition of ammonium dichromate gives

The composition of ?copper matte? is,

The process of converting hydrated alumina into anhydrous alumina is called

In chromite ore, the oxidation number of iron and chromium are respectively

Which of the following is not an element?

Malleability and ductility of metals can be accounted due to

Metals have

Mercury is a liquid metal because

The element which is the most abundant in the earth crust is

Litharge is chemically

Important ore of zinc is

A metal which is refined by polling is

The molecular formula of Ruby silver is

The process of zinc-plating on iron sheet is known as: