List of top Chemistry Questions on Occurrence Of Metals asked in JEE Main

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: Along the period, the chemical reactivity of the element gradually increases from group 1 to group 18.
Statement II: The nature of oxides formed by group 1 element is basic while that of group 17 elements is acidic.
In the light of the above statements, choose the most appropriate from the questions given below:
The density of the alkali metals is in the order:
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 major component of which of the following ore is sulphide based mineral?
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)
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

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.

The metal ion (in gaseous state) with lowest spin-only magnetic moment value is
Transition metal complex with highest value of crystal field splitting \((Δ_0)\) will be
Match List-I with List-II.
 List I List II
A.Concentration ofiAniline
B. Leaching of aluminaiiNaOH
C.Froth stabilizeriii\(SO_2\)
D.Blister copperivNaCN

Choose the correct answer from the options given below.

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

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:

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