JEE Main 2021 16th March Shift 1 Chemistry Question Paper || JEE Main 2021 Chemistry question paper for 16th March

दोस्तों यहां पर JEE Main 2021 16th March Shift 1 Chemistry का Solved Paper दिया गया है तथा आपको JEE Main का ऑनलाइन टेस्ट भी इस वेबसाइट पर दिया गया है।

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Section A

1. Among the following, the aromatic compounds are:

Choose the correct answer from the following options:

(1) (A) and (B) only
(2) (A), (B) and (C) only
(3) (B), (C) and (D) only
(4) (B) and (C) only

(4) (B) and (C) only

2. Given below are two statements:
Statement I: H₂O₂ can act as both oxidising and reducing agent in basic medium. Statement II: In the hydrogen economy,
the energy is transmitted in the form of dihydrogen. In the light of the above statements, choose the correct answer from the options given below:

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(1) Statement I is false but statement II is true.
(2) Both Statement I and Statement II are true.
(3) Statement I is true but statement II is false.
(4) Both Statement I and Statement II are false.

(2) Both Statement I and Statement II are true.

3. Which of the following is Lindlar’s catalyst?

(1) Zinc chloride and HCI
(2) Partially deactivated palladised charcoal
(3) Sodium and Liquid NH₃
(4) Cold dilute solution of KMnO₄

(2) Partially deactivated palladised charcoal

4. In chromatography technique, the purification of compound is independent of:

(1) Length of the column or TLC plate
(2) Mobility or flow of solvent system
(3) Physical state of the pure compound
(4) Solubility of the compound

(3) Physical state of the pure compound

5. Which among the following pairs of Vitamins is stored in our body relatively for longer duration ?

(1) Ascorbic acid and Vitamin D
(2) Thiamine and Ascorbic acid
(3) Vitamin A and Vitamin D
(4) Thiamine and Vitamin A

(3) Vitamin A and Vitamin D

in the above chemical reaction, intermediate “X” and reagent/condition “A” are :

(3)

7. Which of the following DOES NOT in volve Hoffmann bromamide degradation ?

(4)

8. A group 15 element, which is a metal forms a hydride with strongest reducing power among group 15 hydride. element is:

(1) Bi
(2) As
(3) P
(4) Sb

(1) Bi

9. Given below are two statements : One in labelled as Assertion A and the other i labelled as Reason R:
Assertion A : Size of Bk³⁺ ion is less than Np³⁺ ion.
Reason R: The above is a consequence of the lanthanoid contraction.
In the light of the above statements, choose the correct answer from the options given below:

(1) A is false but R is true.
(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) Both A and Rare true and R is the correct explanation of A.

(4) Both A and Rare true and R is the correct explanation of A.

10.

The products “A” and “B” formed in above reactions are:

(1)

11. The type of pollution that gets increased during the day time and in the presence of O₃ is :

(1) Global warming
(2) Reducing smog
(3) Acid rain
(4) Oxidising smog

(4) Oxidising smog

12.
The product “P” in the above reaction is:

(4)

13. Match List – I with List – II:

List-I Industrial process	List-II Application
(a) Haber’s process	(i) HNO₃ synthesis
(b) Ostwald’s process	(ii) Aluminium extraction
(c) Contact process	(iii) NH₃ synthesis
(d) Hall-Heroult process	(iv) H₂SO₄ synthesis

Choose the correct answer from the options given below:

(1) (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
(2) (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
(3) (a)-(iii), (b)–(iv), (c)–(i), (d)-(ii)
(4) (a)–(iii), (b)–(i), (c)–(iv), (d)-(ii)

(4) (a)–(iii), (b)–(i), (c)–(iv), (d)-(ii)

14. Given below are two statements:
Statement I: The Eo value for is Ce⁴⁺/Ce³⁺ is +1.74 V.
Statement II: Ce is more stable in Ce⁴⁺ state than Ce³⁺ state.
In the light of the above statements, choose the correct answer from the options given below:

(1) Both Statement I and Statement II are correct
(2) Statement I is incorrect but statement II is correct
(3) Both Statement I and Statement II are incorrect
(4) Statement I is correct but statement II is incorrect

(4) Statement I is correct but statement II is incorrect

15. Given below are two statements:
Statement I : Both CaCl2.6H2O and MgCl2.8H2O undergo dehydration on heating Statement II : BeO is amphoteric whereas the oxides of other elements in the same group are acidic.
In the light of the above statements, choose the correct answer from the options given below:

(1) Statement I is true but statement II is false.
(2) Both Statement I and Statement II are false.
(3) Statement I is false but statement II is true.
(4) Both Statement I and Statement II are true.

(2) Both Statement I and Statement II are false.

16. Assertion A : Enol form of acetone
[CH₃COCH₃] exists in < 0.1% quantity.
However, the enol form the acetyl acetone
[CH₃COCH₂OCCH₃] exists in approximately 15% quantity.

Reason R : Enol form of acetyl acetone is stabilized by intramolecular hydrogen bonding, which is not possible in enol form of acetone.
Choose the correct answer:

(1) A is true but R is false.
(2) Both A and Rare true but R is the correct explanation of A.
(3) A is false but R is true.
(4) Both A and R are true but R is not the correct explanation of A.

(2) Both A and Rare true but R is the correct explanation of A.

17. Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R
Assertion A: The H-O-H bond angle in water molecule is 104.5°
Reason R: The lone pair-lone pair repulsion of electrons is higher than the bond pair bond pair repulsion.
In the light of the above statements, choose the correct answer from the options given below:

(1) A is false but R is true.
(2) A is true but R is false.
(3) Both A and R are true, and R is the correct explanation of A.
(4) Both A and R are true, but R is not the correct explanation of A.

(3) Both A and R are true, and R is the correct explanation of A.

18. Match List – I with List – II:

List-I Name of oxo acid		List-II Oxidation state of ‘P’
(a) Hypophosphorous acid	(i)	+5
(b) Orthophosphoric acid	(ii)	+4
(c) Hypophosphoric acid	(iii)	+3
(d) Orthophosphorous acid	(iv)	+2
	(v)	+1

Choose the correct answer from the options given below:

(1) (a)–(iv), (b)–(v), (c)–(ii), (d)–(iii)
(2) (a)–(v), (b)–(iv), (c)–(ii), (d)–(iii)
(3) (a)-(v), (b)–(i), (c)–(i), (d)–(iii)
(4) (a)–(iv), (b)–(i), (c)–(ii), (d)–(iii)

(3) (a)-(v), (b)–(i), (c)–(i), (d)–(iii)

19. The process that involves the removal of sulphur from the ores is:

(1) Refining
(2) Roasting
(3) Smelting
(4) Leaching

(2) Roasting

20. The functions of antihistamine are :

(1) Antiallergic and Analgesic
(2) Antacid and antiallergic
(3) Antiallergic and antidepressant
(4) Analgesic and antacid

(2) Antacid and antiallergic

Section B

21.
If the above equation is balanced with integer coefficients, the value of c is …….. .
(Round off to the Nearest Integer).

22. Complete combustion of 750 g of an organic compound provides 420 g of CO₂ and 210 g of H₂O. The percentage composition of carbon and hydrogen in organic compound is 15.3 and ……… respectively.
(Round off to the Nearest Integer).

23. AB₂ is 10% dissociated in water to A²⁺ and B^–. The boiling point of a 10.0 molal aqueous solution of AB₂ is …….. °C.
(Round off to the Nearest Integer).
[Given: Molal elevation constant of water K_b = 0.5 K kg mol^-1 boiling point of pure water = 100°C]

106

24. A certain element crystallises in a bcc lattice of unit cell edge length 274°. If the same element under the same conditions crystallises in the foc lattice, the edge length of the unit cell in Ao will be …… .
(Round off to the Nearest Integer).
[Assume each lattice point has a single atom]

25. The equivalents of ethylene diamine required to replace the neutral ligands from the coordination sphere of the transcomplex of CoCl₃. 4NH₃ is _________ .
(Round off to the Nearest Integer)

26. For the reaction A(g)⇌B(g) at 495 K, Δ_rGo = -9.478 kJ mol^-1
If we start the reaction in a closed container at 495 K with 22 millimoles of A, the amount of B in the equilibrium mixture is millimoles.
(Round off to the Nearest Integer).
[R = 8.314 J mol^-1 K^-1; In 10 = 2.303]

27. When light of wavelength 248 nm falls on a metal of threshold energy 3.0 eV, the de Broglie wavelength of emitted electrons is _________ A°.
(Round off to the Nearest Integer).
[Use : √3 = 1.73, h = 6.63 x 10^-34 Js, m_e = 9.1 x 10_-31 kg;, c = 3.0 × 10⁸ms^-1; 1eV = 1.6 x 10^-19J]

28. A 6.50 molal solution of KOH (aq.) has a density of 1.89 g cm^-3. The molarity of the solution is ________ mol dm^-3 (Round off to the Nearest Integer).
[Atomic masses : K:39.0 u; O:16.0 u; H:1.0 u]

29. Two salts A₂X and MX have the same value of solubility product of 4.0 x 10^-12. The ratio of their molar solubilities i.e., S(A₂X)/S(MX) = ________ (Round off to the Nearest Integer).

30. The decomposition of formic acid on gold surface follows first order kinetics. If the rate constant at 300 K is 1.0 x 10^-3 s^-1 and the activation energy E_a = 11.488 kJ mol^-1, the rate constant at 200 K is ______ x 10^-5 s^-1. (Round off to the Nearest Integer).
(Given R = 8.314 J mol^-1 K^-1).

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1 JEE Main Solved Paper Question Answer With Solutions

1.1 JEE Main 2021 Paper with Solutions

JEE Main Solved Paper Question Answer With Solutions

JEE Main 2021 Paper with Solutions

⚫	JEE Main 2021 Paper with Solutions – 16^th March – Shift 1
1.	JEE Main Physics Question Paper
2.	JEE Main Chemistry Question Paper
3.	JEE Main Maths Question Paper