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List of top Chemistry Questions on Occurrence Of Metals

Consider the following two statements 
Statement I: In \(p\) and \(d\) block both metals and non - metals are present 
Statement II: Electronegativity and ionisation enthalpy of metals is greater than non - metals
Statement-I: There is regular increase in chemical reactivity from group 1 to group 18.
Statement-II: Oxides of group-1 elements are basic and oxide of group 17 are acidic
The major component of which of the following ore is sulphide based mineral?

The correct statement(s) related to processes involved in the extraction of metals is(are)

Pyrolusite is a ore of
In the process of calcination, the ore is heated in the___
The flux used in extraction of iron from haematite is
Values of work function (Wo) for a few metals are given below
Metal LiNaKMgCuAg
 Wo/eV2.422.32.253.74.84.3

The number of metals which will show photoelectric effect when light of wavelength 400nm falls on it is____ 

Given: h = 6.6 × 10-34 J s 
c = 3 x 108 m s-1 
e = 1.6 x 10-19 C

A metal chloride contains 55.0% of chlorine by weight. 100 mL vapours of the metal chloride at STP weigh 0.57 g. The molecular formula of the metal chloride is (Given: Atomic mass of chlorine is 35.5u)
The density of the alkali metals is in the order:
The role of SiO2 in Cu extraction is
Van Arkel-De Boer process for purification of metals is based on thermal instability of
Given below arc two statements:
Statement I : In the metallurgy process. sulphide ore is converted to oxide before reduction.
Statement II : Oxide ores in general are easier to reduce.
In the light of the above statements, choose the most appropriate answer from the options given below
The metal that has very low melting point and its periodic position is closer to a metalloid is
The metal complex that is diamagnetic is (Atomic number : \(Fe, 26; Cu, 29\))
The metal that is not extracted from its sulfide ore is
Which of the following methods are not used to refine any metal?
  1. Liquation
  2. Calcination
  3. Electrolysis
  4. Leaching
  5. Distillation
Choose the correct answer from the options given below :
Transition metal complex with highest value of crystal field splitting \((Δ_0)\) will be
The metal ion (in gaseous state) with lowest spin-only magnetic moment value is

Match List-I with List-II
 

 List-I Ore List-II Composition
A.SideriteI.FeCO3
B.MalachiteII.CuCO3. Cu(OH)2
C.SphaleriteIII.ZnS
D.CalamineIV.ZnCO3


Choose the correct answer from the options given below:

The role of depressants in ‘Froth Floation method’ is to
Which of the following elements is considered as a metalloid?

Given below are two statements.

Statement-I: During electrolytic refining, blister copper deposits precious metals.

Statement-II: In the process of obtaining pure copper by electrolysis method, copper blister is used to make the anode.

In the light of the above statements, choose the correct answer from the options given below.

In the metallurgical extraction of copper, following reaction is used :
FeO + SiO2 → FeSiO3 
FeO and FeSiO3 respectively are.

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.

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