Tags Class 12th

Class 12th

Get insights from 12k questions on Class 12th, answered by students, alumni, and experts. You may also ask and answer any question you like about Class 12th

Follow Ask Question

12k

Questions

Discussions

Active Users

Followers

New answer posted

a month ago

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 )

0 Follower 2 Views

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

0 0

New answer posted

a month ago

Class 12th Chemistry

How many of the following compound contain sulphur atom?

Pyrrole, Furan, Thiophene, Cysteine, Tyrosine, Pyridine

0 Follower 2 Views

alok kumar singh

Contributor-Level 10

0 0

New answer posted

a month ago

Class 12th CBSE 12th

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

0 Follower 9 Views

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

...more

0 0

New answer posted

a month ago

Class 12th Chemistry

Positive Fehling solution test is given by

0 Follower 4 Views

alok kumar singh

Contributor-Level 10

Fehling solution test can be given by aldehyde except aromatic aldehyde

0 0

New answer posted

a month ago

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

0 Follower 1 View

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

0 0

New answer posted

a month ago

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

0 Follower 5 Views

alok kumar singh

Contributor-Level 10

Assume mass of solution

= 100g

Mass of solute = 36gm

Moles of solute = 1

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

0 0

New answer posted

a month ago

Class 12th Ncert Solutions Chemistry Class 12th

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

0 Follower 1 View

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

...more

0 0

New answer posted

a month ago

Class 12th Chemistry

K₂Cr₂O₇ + H₂O₂ + H₂SO_{4
$\to_{c o n d i t i o n s}^{e t h e r c o l d}$} compound 'X' X is a chromium compound, what is the oxidation state of chromium in compound 'X'.

0 Follower 2 Views

alok kumar singh

Contributor-Level 10

K₂Cr₂O₇ + H₂O₂ + H₂SO₄-> + K₂SO₄ + H₂O compound 'X' is ->CrO₅

0 0

New answer posted

a month ago

Class 12th Chemistry Coordination Compounds

Match the following

	Column I (Complexes)		Column II (Metals)
A.	Vitamin B₁₂	(p)	Ti
B.	Wilkinson catalyst	(q)	Co
C.	Ziegler-Natta catalyst	(r)	Fe
D.	Haemoglobin	(s)	Rh

0 Follower 1 View

alok kumar singh

Contributor-Level 10

A. Vitamin B₁₂– Co

B. Wilkinson catalyst –Rh ( [Rh (PPh₃)₃Cl])

C. Ziegler-Natta catalyst –Ti (TiCl₄ +Al (C₂H₅)₃)

D. Haemoglobin – Fe

0 0

New answer posted

a month ago

Class 12th Chemistry

Statement 1 :lonisation energy decreases in a period.

Statement 2 : In a period Z dominates over screening effect

0 Follower 1 View

alok kumar singh

Contributor-Level 10

Ionisation enthalpy increases in a period. Z dominates over screening effect (s) in a period as Z_eff. increases.

0 0

Get authentic answers from experts, students and alumni that you won't find anywhere else

On Shiksha, get access to

65k Colleges
1.2k Exams
678k Reviews
1800k Answers

Community GuidelinesUser Points System

QuestionsDiscussionsTags

Need guidance on career and education? Ask our experts

Your Question

Class 12th

Questions

Discussions

Active Users

Followers

All

Discussions

Unanswered Questions

Share Your College Life Experience