CBSE Class 9th Chemistry Important Questions

CBSE Class 9th Chemistry Important Questions
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CBSE Class 9th Chemistry Important Questions

CBSE Class 9th Chemistry Important Questions: Below article Focuses on various important questions for class 9th science chemistry CBSE students for the final preparation of examination. Questions are more preferable for the Advanced preparation for the exam.

All the below questions updated by our experienced faculty and an experienced team for providing you the best preparation for your final examination. The below articles contains all the important questions which are mostly and have maximum chances for asking in the examination.

Also Read – CBSE Class 9 Chemistry Important Topics

So go through the below article for the most important practical based questions for class 9th science (Chemistry).

Also Read – CBSE Class 9 Science important 1 and 2 marks questions

List of CBSE Class 9th Chemistry Important Questions

Q. Which of the following statements is NOT true about an atom?
(a) Atoms are the building blocks from which molecules and ions are formed.
(b) Atoms cannot exist independently.
(c) Atoms are neutral in nature.
(d) Atoms combine together to form matter that we can see, feel, or touch.
Q. What are suspensions? Explain with an example.
Q. Compare all the proposed models of an atom given in this chapter.

• What factors affect the rate of evaporation?
• In which case evaporation of water will be faster; near the sea or far away from the sea?
• What do you mean by solid ice? Why CO2 is kept under low pressure?
Q. Calculate the relative molecular mass of water (H2O)
Q. Calculate the formula unit masses of ZnO, Na2O, and K2CO3.
[Given atomic masses of Zn = 65 u, Na = 23 u, K = 39 u, C = 12 u, and O = 16 u] Q. What are the limitations of Rutherford’s model of the atom?

Q. When we open the cap of an any carbonated beverage (like Pepsi drink), why does excess of bubbles come out?
Q. What are suspensions? Explain with an example.
Q. Compare all the proposed models of an atom given in this chapter.
Q. If bromine atom is available in the form of, say, two isotopes 35Br79 (49.7%) and 35Br81 (50.3%), calculate the average atomic mass of bromine atom.
Composition of the nuclei of two atomic species X and Y are given as under:
X Y
Protons = 6 6
Neutrons = 6 8
Give the mass numbers of X and Y. What is the relation between the two species?
Q. Solutions do not exhibit Tyndall effect. Reason
Q. What are the characteristics of mixture?

Diffusion becomes faster at higher temperatures. Why?
• Boiling is considered as bulk phenomenon. Why?
• Why does the temperature of a substance remains constant during melting and boiling even when heat is being supplied to it continuously?

Also Read – CBSE Class 9 Science important 3 and 5 marks questions

 

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