Kerala Class 9 Chemistry Important Questions

Realizing the significance of Kerala Board Class 9 syllabus for the students, we at BYJU’s provide exhaustive study resources for students of all classes, which they can use for self-study. Kerala Class 9 Chemistry important questions is also useful for this. If a student wishes to clarify any doubt or learn the various important topics and concepts that are covered by class 9 Chemistry of Kerala Board, then they opt to check out these important questions.

KBPE Class 9 or Kerala Board Class 9 is also a crucial year for students as it gives them a solid foundation of the subject. This makes it easier for them in higher classes. Students can also analyze and assess themselves to see their performance and thus bridge the knowledge gap by preparing ahead. The questions are those that are compiled here are collected after analyzing the previous year question papers, which have been drafted as per the topics covered by the SCERT Kerala Textbooks.

Students can also download PDF version of the Kerala Class 9 Chemistry Important Questions here. Also, get an overview of the compiled list of important questions:

Class 9 Kerala Board Chemistry Important Questions

  1. Nitrogen is an invisible element for plant growth.
  2. (i) Write down any one method by which atmospheric nitrogen reaches the soil.

    (ii) Write any two other uses of nitrogen

2. A few granules of zinc are added to a test tube containing hydrochloric acid.

  1. Which is the gas formed by the reaction?
  2. Which is the product formed when this gas is burnt in air?

3. In an atom of element x, there are 3 shells and 2 electrons in its outermost shell.

  1. Write down the electronic configuration of this element
  2. Find the period and group of this element
  3. What is the valency shown by this element?

4. Hydrogen is known as the fuel of the future.

  1. Write any two advantages of hydrogen as a fuel
  2. Despite these advantages, hydrogen is not usually used as a fuel. Why?

5. Amongst the metals Aluminium, Zinc and Iron, which metal is used for:

  1. Protecting iron from rusting
  2. Making thin foils for packaging industry
  3. The construction of machinery

6. Write the formula for the following compounds.

(a) Aluminium hydroxide (b) Potassium Permanganate (c)Sodium meta aluminate

7. State two difference between roasting and calcination

8. At constant temperature a gas is at a pressure of 1080mm Hg. if the volume is decreased by 40%, find the new pressure of gas.

9. Define absolute zero. Why is it a theoretical concept?

10. (a) Name the chief ore of aluminium

(b) Name the process used to concentrate the above mentioned- ore

(c)Give cathode and anode reactions involved in the extraction of aluminium from its above mentioned ore

(d)Name the process used for concentration of zinc blende

11. State the composition of brass and solder

12. At what temperature will 500cm³ of a gas measured at 20ºC occupy half its volume? The pressure is kept at constant.

13. State 3 important functions performed by respiration in the body.

14. Name 2 acid anhydrides and the corresponding hydrides formed by them

15. A neutralisation reaction is given: NaOH + HCl → NaCl + H2O

  1. Which among the substances have lowest pᵸ value?
  2. What is the pᵸ value of NaCl solution?

16. Sodium carbonate and sodium bicarbonate are two salts used in daily life.

  1. Write down the chemical formula of sodium bicarbonate
  2. Write down any one use of sodium carbonate
  3. Which is the gas formed by the reaction of carbonates with acids
  4. Write down any one consequence of the increase in the concentration of this gas in the atmosphere

17. Electronic configurations of elements P, Q and R are given:

P-2, 1

Q- 2,8, 2

R- 2, 8, 6

  1. Which of the above elements belong to the same period?
  2. Which amongst the elements have the highest electronegativity?
  3. Write down the chemical formula of the compound formed by P and R

18. Molecular formula of some compounds are given here.

(i) C3H8 (ii) C3H4 (iii)C3H6 (iv) C3H8O

  1. Which among the above is an alkane?
  2. Write the general formula of the category of hydrocarbons to which Q belong.
  3. Write down the formula of the next homologue of R

19. Ammonia is catalytically oxidized with oxygen.

  1. Name the catalyst
  2. Write a balanced chemical equation for the catalytic oxidation of Ammonia
  3. Write the industrial process that starts the catalytic oxidation of Ammonia
  4. Name the drying agent used in the laboratory preparation of Ammonia

20. When substance A is heated, a reddish brown gas is evolved, which rekindles a glowing wooden splinter. A yellow residue is left in the test tube.

  1. Name the reddish brown gas
  2. Name the gas that relights a glowing splinter

Practise This Question

We observe that some portion of wax (in candle) melts and other portion of it is used in producing heat and light.
Statement A: The melting of wax is a physical change
Statement B: The burning of wax for the production of heat and light is a chemical change.
State which of the statement(s) is/are true.