JEE Main 2021 Question Paper with Solutions- 24 Feb C2

Attempting question papers is best way to practice. In this blog you have JEE Main 2021 question paper with solutions for 24^th February shift 1.

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JEE Main 2021 Question Paper with Solutions- 24 February Shift 1

Chemistry

Question 1

S in BUNA-S stands for?

1. Styrene
2. Strength
3. Stoichiometry
4. Secondary

Correct answer: 1

Question 2

Bond angle and shape of I₃^– ion is?

1. 180^o and sp³d
2. 180^o and sp³d²
3. 90^o and sp³d
4. 90^o and sp³d²

Correct answer: 1

Question 3

The following conversion can take place by:

1. (i) Br₂/Fe (ii) Sn/HCl

2. (i) Br₂/Fe (ii) Sn/HCl (iii) NaNO₂/HCl (iv) Cu₂Br₂

3. (i) Cu₂Br₂ (ii) Sn/HCl (i) Br₂/Fe

4. None of these

Correct answer: 2

Question 4

According to Bohr’s model which of the following transition will be having maximum frequency?

1. 3 to 2
2. 5 to 4
3. 4 to 3
4. 2 to 1

Correct answer: 4

Question 5

Concentration of Pbl₂ is given as = 0.1 M ;K_sp = 8 x 10^-9. Find solubility of Pb⁺² .

1. 1.4 x 10^-3
2. 2 x 10^-4
3. 1.26 x 10^-3
4. 1.8 x 10^-2

Correct answer: 3

Question 6

Increasing strength towards nucleophilic attack ?

1. (I) < (II) < (III) < (IV)
2. (IV) < (III) < (II) < (I)
3. (IV) < (II) < (III) < (I)
4. (I) < (III) < (II) < (IV)

Correct answer: 1

Question 7

Statement1: Hydrogen is most abundant in universe but not so in Earth’s troposphere.

Statement2: Hydrogen is the lightest element

1. Statement 1 is correct and Statement 2 is incorrect.

2. Statement 1 is incorrect and Statement 2 is correct.

3. Statement 1 is correct and Statement 2 is correct explanation for statement 1.

4. Statement 1 is correct and Statement 2 is incorrect explanation for statement 1.

Correct answer: 3

Question 8

Which of the following salts help in blood clotting?

1. FeCl₃
2. Mg(HCO₃)₂
3. NaHCO₃
4. FeSO₄

Correct answer: 1

Question 9

Match the following:

1. p → (iv); q → (iii), r → (i), s → (ii)
2. p → (i); q → (ii), r → (iv), s → (iii)
3. p → (iv); q → (iii), r → (ii), s → (i)
4. p → (iii); q → (iv), r → (i), s → (ii)

Correct answer: 1

Question 10

What will be the magnetic moments (spin only values) of the following complexes?

[FeCl₄]^2- ,[ Co(C₂O₄)₃]^3- ,MnO₄^2-

1. √3,0,0
2. √24,0,√3
3. √24,√24,0
4. √3,0,√24

Correct answer: 2

Question 11

Compare the wavelength in flame test for LiCl, NaCl, KCl, RbCl, CsCl

1. NaCl < CsCl < LiCl < RbCl < KCl
2. CsCl < NaCl < LiCl < KCl < RbCl
3. RbCl < KCl < LiCl < CsCl < NaCl
4. CsCl < NaCl < KCl < LiCl < RbCl

Correct answer: 2

Question 12

Choose incorrect statement:

1. RuO₄ is oxidizing agent
2. OsO₄ is reducing agent
3. Cr₂O₃is amphoteric
4. Red colour of ruby is due to Co³⁺

Correct answer: 2

Question 13

Which of the following has highest M.P.?

1. MgO
2. LiF
3. NaCl
4. LiCl

Correct answer: 1

Question 14

Arrange the following in the increasing order of their density: Zn, Fe, Cr, Co

1. Zn < Cr < Co < Fe
2. Fe < Co < Cr < Zn
3. Fe < Cr < Co < Zn
4. Zn < Cr < Fe < Co

Correct answer: 4

JEE Main Frequently Asked Questions (FAQs)

Question 1: When is JEE mains 2021 exams?

Answer: National Testing Agency has announced dates for all phases of JEE Mains. First phase is in February 2021 (23, 24, 25 and 26). Second phase is in March 2021 (15, 16, 17 & 18) , third in April 2021 (27, 28, 29 & 30) and fourth in May 2021 (24, 25, 26, 27 & 28). To get more details about JEE Mains click here.

Question 2: Can I challenge JEE Mains 2021 answer key? How?

Answer: Yes, candidates who have objection to the answer key given by National Testing Agency can go to jeemain.nta.nic.in , from where they can challenge answer key.

Question 3: Does National Testing Agency refund JEE Mains 2021 answer key fees.

Answer: Yes, National Testing Agency refund fees if objection is found valid with proper supporting documents.

Question 4: Who will conduct JEE Mains 2021 Counseling?

Answer: Joint Seat Allocation Authority (JoSAA) is responsible for counseling of JEE Mains 2021 qualified students.

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