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Class 12th Chemistry Electrochemistry

The volume strength of 0.75 M H₂O₂ solution is

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alok kumar singh

Contributor-Level 10

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Class 12th Chemistry

Monomer of neoprene polymer is

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alok kumar singh

Contributor-Level 10

Monomer of neoprene polymer is

3-Chloro-1, 3-butadiene

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Class 12th Chemistry Solutions

Osmotic pressure at 273 K is 7 * 10⁵ Pa, then what will be the value of x, if its osmotic pressure at 283 K is x * 10⁴ Pa?

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alok kumar singh

Contributor-Level 10

$π_{1} = i C R T_{1}$

$π_{2} = i C R T_{2}$

$\frac{π_{1}}{T_{1}} = \frac{π_{2}}{T_{2}}$

$π_{2} = \frac{π_{1} * T_{2}}{T_{1}}$

$= \frac{7 * 1 0^{5} * 283}{273}$

= 7.256 * 10⁵ * Pa

= 72.56 * 10⁴ Pa

p₂ = x * 10⁴

x = 72.56 » 73

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Class 12th Chemistry Electrochemistry

Through a ZnSO₄ solution, 0.015 A current was passed for 15 minutes. What is the mass of Zn deposited? (in mg)

(Atomic weight of Zn = 65.4 )

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alok kumar singh

Contributor-Level 10

Charge passed = It

= 0.015 * 15 * 60 C

Moles of electrons passed $= \frac{0.015 * 15 * 60}{96500}$

Moles of Zn deposited = $\frac{1}{2} * \frac{0.015 * 15 * 60}{96500}$

= 0.00007

Mass of Zn deposited = 0.00007 * 65.4 g = 4.58mg

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Class 12th Chemistry

How many of the following compound contain sulphur atom?

Pyrrole, Furan, Thiophene, Cysteine, Tyrosine, Pyridine

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alok kumar singh

Contributor-Level 10

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Class 12th CBSE 12th

What is the weightage of Class 12 Chapter 1 Solutions in CBSE and other competitive exams?

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nitesh singh

Contributor-Level 10

After the 2023-24 revised CBSE syllabus, many chapters have been removed, and in some chapters syllabus is reduced. As per the latest CBSE exam pattern 2025-26, the Chapter 1 Solutions will be asked for 5-7 marks in the Class 12 Chemistry CBSE board exams.

For other competitive exams, the Solutions chapter has a medium weightage in the NEET exam. In the NEET exam, 1-2 questions are frequently asked based on the concept of moderate-level numerical.

Physical Chemistry holds over 30% weightage in the chemistry section in the JEE Mains exam. The solutions chapter is considered a part of physical chemistry. You can expect 1 question fo

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Class 12th Chemistry

Positive Fehling solution test is given by

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alok kumar singh

Contributor-Level 10

Fehling solution test can be given by aldehyde except aromatic aldehyde

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Class 12th Chemistry Chemical Kinetics

Given $K_{n e t} = \frac{K_{1} K_{2}}{K_{3}}$ when $E_{a_{1}}$ =40 kJ/mol

$E_{a_{1}}$ =50 kJ/mol. = $E_{a_{1}}$ 60 kJ/mol

Calculate value of (E_a)_net in kJ/mol

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alok kumar singh

Contributor-Level 10

(E_a)_net = $E_{a_{1}}$ + $E_{a_{2}}$ – $E_{a_{3}}$

= 40 + 50 – 60

= 90 – 60

= 30kJ/mol

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Class 12th Chemistry Solutions

Calculate the molarity of a solution having density = 1.5g/mL %(w/w) of solute is 36% and molecular 36 g/mol

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alok kumar singh

Contributor-Level 10

Assume mass of solution

= 100g

Mass of solute = 36gm

Moles of solute = 1

Molarity= $\frac{1 * 1000}{(\frac{100}{1.5})} = \frac{1000}{100} * 1.5 = 15$

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Class 12th Ncert Solutions Chemistry Class 12th

What are the benefits of using Class 12 Chemistry Chapter 1 NCERT Solutions?

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Esha Garg

Beginner-Level 5

NCERT offers the foundation for every class 12 student. CBSE board exam questions are primarily based on the NCERT exercise, Examples and conceptual explanation.

There are various benefits of using NCERT Solutions.

Specially for CBSE Board students, these NCERT Solutions are the best resource to prepare for the boards.
These NCERT Solutions include step-wise descriptive answer approach that will help you write good answers.
These solutions also help you understand problem-solving and how to approach a specific type of conceptual or numerical problem.
If you are preparing for the JEE or NEEt exam, these solutions can be your first deci

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