Exam Paper Solutions

# JEE Main 2021 Question Paper with Solutions- 24 Feb C2

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Posted by Mahak Jain, 17/3/2021

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

In this blog we provide you JEE Main 2021 question paper with solutions for free. Here at Kunduz we aim to provide quality solutions from best tutors at Kunduz. These solutions for JEE Main 2021 question paper are prepared by Kunduz tutors.

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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

#### Question 2

Bond angle and shape of I3 ion is?

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

#### 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

#### 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

#### Question 5

Concentration of Pbl2 is given as = 0.1 M ;Ksp = 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

#### 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)

#### 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.

#### Question 8

Which of the following salts help in blood clotting?

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

#### 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)

#### Question 10

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

[FeCl4]2- ,[ Co(C2O4)3]3- ,MnO42-

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

#### 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

#### 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+

#### Question 13

Which of the following has highest M.P.?

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

#### 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

## 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.

## Importance of Doubt Clearing with Solving JEE Mains Question Paper

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