JEE-MAIN SERIES Chemistry
Occurrence Of Metals
20 previous year questions.
Volume: 20 Ques
Yield: Medium
High-Yield Trend
2
2024 5
2023 13
2022 Chapter Questions 20 MCQs
01
PYQ 2022
medium
chemistry ID: jee-main
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.
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.
1
Both A and R are true and R is the correct explanation of A
2
Both A and R are true but R is NOT the correct explanation of A
3
A is true but R is false
4
A is false but R is true
02
PYQ 2022
medium
chemistry ID: jee-main
The metal that has very low melting point and its periodic position is closer to a metalloid is
1
Al
2
Ga
3
Se
4
ln
03
PYQ 2022
easy
chemistry ID: jee-main
The metal complex that is diamagnetic is (Atomic number : )
1
2
3
4
04
PYQ 2022
medium
chemistry ID: jee-main
The metal that is not extracted from its sulfide ore is
1
Aluminium
2
Iron
3
Lead
4
Zinc
05
PYQ 2022
medium
chemistry ID: jee-main
Which of the following elements is considered as a metalloid?
1
Sc
2
Pb
3
Bi
4
Te
06
PYQ 2022
medium
chemistry ID: jee-main
The role of depressants in ‘Froth Floation method’ is to
1
Selectively prevent one component of the ore from coming to the froth
2
Reduce the consumption of oil for froth formation
3
Stabilize the froth
4
Enhance non-wettability of the mineral particles.
07
PYQ 2022
medium
chemistry ID: jee-main
Which of the following methods are not used to refine any metal?
- Liquation
- Calcination
- Electrolysis
- Leaching
- Distillation
1
B & D only
2
A, B, D & E only
3
B, D & E only
4
A, C & E only
08
PYQ 2022
easy
chemistry ID: jee-main
Transition metal complex with highest value of crystal field splitting will be
1
2
3
4
09
PYQ 2022
medium
chemistry ID: jee-main
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.
1
Both Statement-I and Statement-II are true.
2
Both Statement-I and Statement-II are false..
3
Statement-I is true but Statement II is false..
4
Statement-I is false but Statement-II is true
10
PYQ 2022
easy
chemistry ID: jee-main
The metal ion (in gaseous state) with lowest spin-only magnetic moment value is
1
V2+
2
Ni2+
3
Cr2+
4
Fe2+
11
PYQ 2022
medium
chemistry ID: jee-main
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 | |
| D. | Blister copper | iv | NaCN |
Choose the correct answer from the options given below.
1
(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
2
(A)-(IV), (B)-(II), (C)-(I), (D)-(III)
3
(A)-(III), (B)-(II), (C)-(I), (D)-(IV)
4
(A)-(II), (B)-(IV), (C)-(III), (D)-(I)
12
PYQ 2022
medium
chemistry ID: jee-main
In the metallurgical extraction of copper, following reaction is used :
FeO + SiO2 → FeSiO3
FeO and FeSiO3 respectively are.
1
Gangue and flux
2
Flux and slag
3
Slag and flux
4
Gangue and slag
13
PYQ 2022
medium
chemistry ID: jee-main
Match List-I with List-II
| List-I Ore | List-II Composition | ||
| A. | Siderite | I. | FeCO3 |
| B. | Malachite | II. | CuCO3. Cu(OH)2 |
| C. | Sphalerite | III. | ZnS |
| D. | Calamine | IV. | ZnCO3 |
Choose the correct answer from the options given below:
1
A-I, B-II, C-III, D-IV
2
A-III, B-IV, C-II, D-I
3
A-IV, B-III, C-I, D-II
4
A-I, B-II, C-IV, D-III
14
PYQ 2023
medium
chemistry ID: jee-main
The major component of which of the following ore is sulphide based mineral?
1
Siderite
2
Sphalerite
3
Malachite
4
Calamine
15
PYQ 2023
medium
chemistry ID: jee-main
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)
1
MCL
2
MCL2
3
MCL3
4
MCL4
16
PYQ 2023
medium
chemistry ID: jee-main
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
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
1
Both Statement I and Statement II are correct
2
Statement I is correct but Statement II is incorrect
3
Statement I is incorrect but Statement II is correct
4
Both Statement I and Statement II are incorrect
17
PYQ 2023
medium
chemistry ID: jee-main
The density of the alkali metals is in the order:
1
K
2
Na
3
K
4
NavRb
18
PYQ 2023
medium
chemistry ID: jee-main
Values of work function (Wo) for a few metals are given below
| Metal | Li | Na | K | Mg | Cu | Ag |
| Wo/eV | 2.42 | 2.3 | 2.25 | 3.7 | 4.8 | 4.3 |
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
19
PYQ 2024
medium
chemistry ID: jee-main
Consider the following two statements
Statement I: In and block both metals and non - metals are present
Statement II: Electronegativity and ionisation enthalpy of metals is greater than non - metals
Statement I: In and block both metals and non - metals are present
Statement II: Electronegativity and ionisation enthalpy of metals is greater than non - metals
1
Both Statement I and Statement II are correct
2
Both Statement I and Statement II are incorrect
3
Statement I is correct, but Statement II is incorrect
4
Statement I is incorrect, but Statement Il is correct
20
PYQ 2024
hard
chemistry ID: jee-main
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:
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:
1
Both statement-I and statement-II are true
2
Statement-I is true and statement-II is false
3
Statement-I is false and statement-II is true
4
Statement-I and statement-II both are false