# NCERT Class 11 Solutions Equilibrium

Scroll down for PDF

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. Studiestoday.com panel of teachers recommend students to practice questions in NCERT books and download NCERT solutions.

## 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

### Class 10 and 12 exam 2020 application process for private candidates

CBSE 10th, 12th exam 2020 application process for private candidates begins to apply by 30th Sept at cbse.nic.in CBSE Board Exam 2020 application begins: The Central Board of Secondary Education (CBSE) has officially started the online application process for the...

### CBSE Class 12th Board Exam 2020

CBSE Class 12th Board Exam 2020: Here are some exam preparation tips Every year the Central Board of Secondary Education (CBSE) conducts annual board exams for the students of 10th and 12th grade in February / March. Class 12th board exams play a very significant role...

### 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...

### Sample Papers for Class 10 Boards 2020

CBSE has recently released the Class 10 Sample Papers for Board exams which are to be held in March 2020. The sample papers have been for class 10 for all subjects along with the suggested marking scheme. CBSE releases these suggested papers every year so that the...

### UP government schools will follow NCERT

UP government schools will follow NCERT pattern from April 2020Are you appearing for the UP exams 2020? If yes, then you have to see what major changes UP government schools have brought for 2020.The UP government is fully prepared to implement NCERT pattern for...