Kerala SSLC Pre Model Question Paper 2024 Chemistry

Kerala Board

Question Paper
2024

SSLC PRE- MODEL EXAMINATION - 2024
MALAPPURAM DISTRICT EM

MPM - 104 A CHEMISTRY (SET I) Time : 45 Minutes
(English) Total Score : 20
Answer any two questions from 1 to 3. Each question carries 1 score.
1. Name the subshell commonly present in all shells?
2. Which gas law states that PV = a constant? (Boyle’s law, Charles law, Avogadro’s law)
3. Name the product obtained at cathode during the electrolysis of molten sodium chloride.
Answer any two questions from 4 to 6. Each question carries 2 scores.
4. Atomic number of Cu=29, Oxidation state of O = -2.
a. Find out the oxidation state of Cu in CuO. (b) Write the subshell electronic configuration of this ion.
5. A sample of 3×6.022×10 23 CO 2 molecules at STP is given. (Gram molecular mass of CO 2 = 44g)
(a) How many grams of CO2 is present in the sample. (b) Calculate the volume of sample at STP.
6. Most of the metals losses its luster due to the reaction with atmospheric air.
(a) Among copper, magnesium and aluminium, which one loss its luster at a faster rate?
b. Write the chemical equation of that reaction.
Answer any two questions from 7 to 9. Each question carries 3 scores.
7. A zinc rod is immersed in CuSO4 solution and Cu metal is deposited on Zinc.
(a) Among Zinc and copper, which metal is more reactive? (b) The intensity of the colour of this solution decreases
after some times. Why? (c) Write the chemical equation in this reaction.
8. The relation between the volume and temperature of a definite mass of gas are given. (pressure kept constant).
(a) Complete the table. (b) What is the relationship between volume and temperature of a gas? (c) Name the gas
Law related to this.
V T in Kelvin scale V/T
1000 mL _____ 2
1200 mL 600 Ka.
9. Subshell electronic configuration of an element is given below.
1s2 2s2 2p6 3s2 3p6 3d34s2
(a) Find its atomic number. (b) Write the electronic configuration with the symbol of noble gas preceding to this
element. (c) Write any one property of metals belonging to that block.
Answer any two questions from 10 to 12. Each question carries 4 scores.
10. The outermost subshell electronic configuration of two elements, X and Y are 3s2 and 3s2 3p5.
(a) Write the complete subshell electronic configuration of element X. (b) Find out the group and period number of
element Y. (c) Find out the valency of X and Y? (d) What is the chemical formula of compound formed by X and Y?
11. A picture of galvanic cell is given below. (Hint: - Reactivity- Mg > Zn)

(a) Which is the energy change takes place in the galvanic cell? (b) Which electrode acts as anode?
(c) Write down the reaction takes place at cathode? (d) Write the redox reaction takes place in this cell?
12. Certain data regarding some gases kept at same conditions of temperature and pressure given below.
Gas Volume (L) No of molecules
Chlorine 10 L y
Carbon dioxide ____ y/2
Ammonia 10 L ___
Hydrogen _____ 3y
Oxygen 20 L ......
a. Complete the table.
b. Which gas law is applicable here? State the law.

SSLC PRE- MODEL EXAMINATION - 2024
MALAPPURAM DISTRICT EM

MPM - 104 B CHEMISTRY (SET I) Time : 45 Minutes
(English) Total Score : 20

Answer any two questions from 1 to 3. Each question carries 1 score
1. Which of the following subshell is not possible
(3s, 4d, 3f, 2p)
2. 1 GMM of any gas contains——L at STP.
3. What is the energy change occurs in an electrolytic cell?
Answer any two questions from 4 to 6. Each question carries 2 scores
4. The outer subshell electronic configuration of an element is 3S2.
(a) Write the complete electronic configuration of this element
(b) Find the atomic number of this element
5. When an inflated balloon is immersed in water, it’s size decreases.
(a) Which law is associated with the situation? (b) State the law
6. Put copper rod in silver nitrate solution.
(a) What is your observation?
(b) If the copper rod is replaced by gold rod will the reaction occur? Why?
Answer any two questions from 7 to 9. Each question carries 3 scores
7. The element X has the atomic number 29.
(a) Write down the complete electronic configuration of the element
(b) Identify the group and period in which the element belongs to
(c) Write the electronic configuration of x2+ ion.
8. Atomic mass of N=14 and Atomic mass of O=16
(a) What is the GMM of NO2 (b) Find the mass of 44.8 L NO2 kept at STP
9. Following are the reactions taking place at each electrode in a Cu -Ag galvanic cell.
(i) Cu——>Cu2+ + 2e (ii) Ag+ + 1e ———>Ag
(a) Which reaction is taking place at anode? (b) Which one represent reduction?
(c) What happens to the oxidation number when an atom is reduced?
Answer any two questions from 10 to 12. Each question carries 4 scores
10. Atomic number of A= 13 and atomic number of B= 17
(a) Write the subshell electronic configuration of the element B in the short way.
(b) Write any two characteristics of the group in which A belongs to
(c) Write the chemical formula of the compound formed by the reaction between A and B.
11. Complete the table (Atomic masses of H=1,C=12,O=16,N=14)
Substance Number of molecules Number of moles Mass(g)
H2O (A) 3 54g
CH4 4NA (B) (C)
NH3 NA (D) 17g

12.

(a) Write the direction of electron flow (b) Which are the anode and cathode in this cell
(c)Write down the redox reaction occuring in the given cell (d)For what purpose salt bridge is used?

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