Class 9 Science CBSE Assignments for matter in our Surroundings

Given below are the Class 9 Science CBSE Assignments for matter in our Surroundings
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Question 1. Explain why?
i. A gas fill a vessel completely.
ii. Camphor disappears without leaving any residue.
iii. The temperature does not rise during the process of melting and boiling, through heat energy is constantly supplied.
iv. Water stored in an earthen vessel becomes cool.
v. An iron almirah is a solid at room temperature.

Question 2. Which phenomenon occurs during the following changes?
ii. Wax melts in the sun.
iii. Drying of wet clothes
iv. Formation of clouds
v. Density of liquids is more than gases.

Question 3. Define:
i.Melting point
ii.Boiling point
v.Brownian motion
Question 4..Differentiate between amorphous and crystalline solids.

Question 5.Match the following
Class 9 Science CBSE Assignments for matter in our Surroundings

Question 6.Arrange the state in increasing order of the forces of attraction between the particles
b) Gas
c) Solid

Question 7.What is Plasma and Bose-Einstein Condensate?

Question 8. On converting 25 0C, 38 0C and 66 0C to kelvin scale, the correct sequence of temperature will be
(a) 298 K, 311 K and 339 K
(b) 298 K, 300 K and 338 K
(c) 273 K, 278 K and 543 K
(d) 298 K, 310 K and 338 K

Question 9. A student heats a beaker containing ice and water. He measures the temperature of the content of the beaker as a function of time. Which of the following would correctly represent the result? Justify your choice.
Class 9 Science CBSE Long Answer type questions for matter in our Surroundings

Question 10.Why does the temperature of a substance remain constant during its melting point or boiling point?

Question 11.In which of the following conditions, the distance between the molecules of hydrogen gas would increase?
(i) Increasing pressure on hydrogen contained in a closed container
(ii) Some hydrogen gas leaking out of the container
(iii) Increasing the volume of the container of hydrogen gas
(iv) Adding more hydrogen gas to the container without increasing the volume of the container
(a) (i) and (iii)
(b) (i) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)

Foundation Level Questions for Olympiads/JEE Level/PMT/KVYP

Question 12. Calculate each of the following quantities for an ideal gas
a) The volume of the gas in liters, if 2.46 mol has a pressure of 1.28 atm at a temperature of -60C;
b) The absolute temperature of the gas at which 4.79 x 10-2 mol occupies 135 mL at 720 torr;
c) The pressure, in atmospheres, if 5.52 x 10-2 mol occupies 413 mL at 880C;
d) The quantity of gas, in moles, if 88.4 L at 540C has a pressure of 9.84 kPa.

Question 13. Vessel A contains CO(g) at 00C and 1 atm. Vessel B contains SO2 (g) at 200C and 0.5 atm. The two vessels have the same volume.
a) Which contains more molecules?
b) Which contains more mass?
c) In which vessel is the average kinetic energy of molecules higher?

Question 14. Match the column Class 9 Science CBSE Assignments for matter in our Surroundings


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Reference Books for class 9 science

Given below are the links of some of the reference books for class 9 science.

These books by S.Chand Publications are detailed in their content and are must have books for class 9 students.
  1. Science for Ninth Class Part1 Physics
  2. Science for Ninth Class Part2 Chemistry
  3. Science for Ninth Class Part3 Biology
Some other books that might be worth considering are
  1. Oswaal CBSE Question Bank Class 9 Science Chapterwise & Topicwise We all know importance of practicing what we have studied. This book is perfect for practicing what you have learned and studied in the subject.
  2. Pearson Foundation Series (IIT-JEE/NEET) Physics, Chemistry, Maths & Biology for Class 9 (Main Books) | PCMB Combo These Foundation books would be helpful for students who want to prepare for JEE/NEET exams. Only buy them if you are up for some challenge and have time to study extra topics. These might be tough for you and you might need extra help in studying these books.
  3. Foundation Science Physics for Class - 9 by H.C. Verma This is one of my favorite Physics book for class 9. Most of the book is within the limits of CBSE syllabus. It might overwhelm you with its language but I feel if you can understand the content is authentic with plenty of problems to solve.

You can use above books for extra knowledge and practicing different questions.

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