NCERT Class 11 Solutions Equilibrium

Scroll down to download pdf file

NCERT Class 11 Solutions Equilibrium - NCERT Solutions prepared for CBSE students by the best teachers in Delhi.

Class XI Chapter 7 – Equilibrium Chemistry

Question 7.1: A liquid is in equilibrium with its vapour in a sealed container at a fixed temperature. The volume of the container is suddenly increased.

a) What is the initial effect of the change on vapour pressure?

b) How do rates of evaporation and condensation change initially?

c) What happens when equilibrium is restored finally and what will be the final vapour pressure?

Answer: (a) If the volume of the container is suddenly increased, then the vapour pressure would decrease initially. This is because the amount of vapour remains the same, but the volume increases suddenly. As a result, the same amount of vapour is distributed in a larger volume.

(b) Since the temperature is constant, the rate of evaporation also remains constant. When the volume of the container is increased, the density of the vapour phase decreases. As a result, the rate of collisions of the vapour particles also decreases. Hence, the rate of condensation decreases initially.

(c) When equilibrium is restored finally, the rate of evaporation becomes equal to the rate of condensation. In this case, only the volume changes while the temperature remains constant. The vapour pressure depends on temperature and not on volume. Hence, the final vapour pressure will be equal to the original vapour pressure of the system.

Question 7.2: What is Kc for the following equilibrium when the equilibrium concentration of each substance is: [SO2]= 0.60 M, [O2] = 0.82 M and [SO3] = 1.90 M ?

Question 7.3: At a certain temperature and total pressure of 105 Pa, iodine vapour contains 40% by volume of I atoms Calculate Kpfor the equilibrium.

Question 7.9: Nitric oxide reacts with Br2 and gives nitrosyl bromide as per reaction given below: When 0.087 mol of NO and 0.0437 mol of Br2 are mixed in a closed container at constant temperature, 0.0518 mol of NOBr is obtained at equilibrium. Calculate equilibrium amount of NO and Br2.

Question 7.11: A sample of HI(g) is placed in flask at a pressure of 0.2 atm. At equilibrium the partial pressure of HI(g) is 0.04 atm. What is Kp for the given equilibrium?

Question 7.17: Kp = 0.04 atm at 899 K for the equilibrium shown below. What is the equilibrium concentration of C2H6 when

Students should free download the NCERT solutions and get better marks in exams. panel of teachers recommend students to practice questions in NCERT books and download NCERT solutions.


Click on the text For more study material for Chemistry please click here - Chemistry

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

CBSE schools to have sports period daily for classes 1 to 12

All work and no play makes a child dull. Nowadays students have a very hectic schedule so that they cannot take out time to play games and gently start ignoring sports. Therefore, it is the responsibility of schools to include physical education in the curriculum so...

Top Classroom Challenges According to the Teachers

Teacher plays a major role in our lives in the classrooms. Not only is studying, but the teacher also serves many other roles in the classrooms. A teacher is always a role model for a student who can inspire him to live a better future life. Besides this, life of a...

Study in India Short-term curriculum

Short-term curriculum for foreign students under 'Study in India': Yoga Global Planning In order to encourage international students to learn yoga, the Human Resource Development Ministry has decided to introduce training courses under the Modi’s government aspiring ‘...

What to do if you fail in the class 12th compartment exam

The Central Board of Secondary Education (CBSE) has declared the results of the class 12 compartment examination held on July 2. By the way, students who have passed the exams can breathe in relief, but those students who have not yet passed, they have to focus on...

CBSE schools to participate in National Assessment

CBSE schools to participate in National Assessment for Scientific Temperament and Aptitude According to the latest reports, CBSE has asked all its affiliated schools to encourage and motivate the students to participate in a national assessment programme which is...

CBSE Class 10 Board Exam 2020

CBSE Class 10 Board Exam 2020: Problems Students May Face In Choosing Subject The Central Board of Secondary Education (CBSE) class 10 board examination will start from February 2020. The Central Board of Secondary Education (CBSE) has started the process of filling...

Studies Today