SSC Public Examinations – Andhra Pradesh
General Science Model Paper – Paper – I
Physical Sciences
Time: 2.45 Minutes. Parts A & B Max. Marks: 40
Instructions:
i) In the time duration of 2 hours 45 minutes, 15 minutes of time is allotted to read and understand the question paper.
ii) Answer the questions under Part ‘A’ on a separate answer book.
iii) Write the answers to the questions under part ‘B’ on the question paper itself and attach it to the answer book of part ‘A’.
Part – A
SECTION – I
Note: 1. Answer all the questions.
2. Each question carries ONE mark.
3. Answer each question in 1 or 2 sentences. (4 × 1 = 4 M)
Also Read: 10th Biology Model Paper
1. How does eye lens change its focal length?
2. Find the absolute refractive index of water, if its critical angle is 48.5° (sin 48.5° = 0.75)
3. How do you appreciate the role of esters in everyday life?
4. Write the names of any two compounds which have ionic bond.
SECTION – II
Note: 1. Answer all the questions.
2. Answer each question in 4 or 5 sentences.
3. Each question carries TWO marks. (5 × 2 = 10 M)
5. i) CaCO3 (s) → CaO (s) + CO2 (g)
ii) 2 AgBr (s) → 2 Ag (s) + Br2 (g)
Mention the types of reactions to which the above equations belong. Also mention
which of them is a photo chemical reaction.
6. Between a neutral atom and its cation which has bigger size? Why?
7. Why Dobereiner, Newlands and Mandeleeff were not 100% succesful in the classification of elements? Why the modern table is relatively a better classification? Predict the reason.
8. Draw the diagram that explains the formation of an image by a plane mirror.
9. What is the value of 1 KWH in Joules?
Also Read: 10th Physical Bit Bank – Important Questions
SECTION – III
Note: 1. Answer all the questions.
2. Each question carries FOUR marks.
3. Answer each question in 8 to 10 sentences.
4. There is internal choice for each question. Only one option from each question is to be attempted. (4 × 4 = 16 M)
10. Revathi said that presence of air and water are essential for corrosion. Suggest an experiment to prove Revathi’s statement. (Or)
Mention different types of chemical decomposition reactions. Which method is suitable for the decomposition of water? Draw a neat diagram of it.
11. How do you verify experimentally that the focal length of convex lens is increased when it is kept in water?
(Or)
Gowri observed that petrol kept in a vessel disappears after sometime. Rani heated water in a beaker and turned into water vapour. How would you distinguish between these two processes?
12. Explain the formation of double bond and triple bond according to Lewis theory.
(Or)
How do you explain the process of artificial ripening of fruits by ethylene?
13. The resistance of 5 Ω, 15 Ω, 20 Ω, and 10 Ω are connected as shown in the figure. Find the resultant resistance of the circuit.
a) State right hand rule with a labelled diagram.
b) A coil of insulated copper wire is connected to a galvanometer. What happens, if a bar magnet is
i) pushed into the coil
ii) withdrawn from inside the coil
iii) held stationary inside the coil.
PART – B
Time: 30 Minutes. Max. Marks: 10
Instructions:
i) Answer all the questions.
ii) Each question carries 1/2 mark.
iii) Answers are to be written question paper only.
iv) Marks will not be awarded in any case of over writing, rewritten or erased answers.
v) Write the CAPITAL LETTER (A, B, C, D) showing the correct answer for the following question in the brackets provided against them.
14. When a ray is incident perpendicular to the plane surface, the angle of reflection is.. ( )
A) 90° B) 180° C) 0° D) 120°
15. Specific heat of a substance depends….( )
i) Nature of the substance
ii) Mass of the substance
iii) Heat given to the substance
A) i is correct
B) i and ii are correct
C) i, ii and iii are correct
D) i, ii and iii are wrong
16. Principal quantum number is related to…( )
A) Size of the orbit
B) Spin angular momentum
C) Orbital angular momentum
D) Orientation of orbital in space
17. 2 C3H8 + X.O2 → 6 CO2 + Y.H2O in this equation X and Y values are…. ( )
A) X = 4, Y = 8 B) X = 10, Y = 4
C) X = 10, Y = 8 D) X = 2, Y = 9
18. Arrange the following in a systematic order… ( )
i) Modern periodic table ii) Law of Octaves
iii) Periodic table iv) Law of Triads
A) i, ii, iii, iv B) ii, i, iv, iii
C) iv, ii, iii, i D) iii, ii, iv, i
20. In integrated circuits ………. are used instead copper to connect the components
together. ( )
A) Graphite B) C60 C) Nanotube D) PVC
21. Match the following: ( )
1) Bauxite P) Lead
2) Galena Q) Calcium
3) Gypsum R) Aluminium
A) 1-P, 2-Q, 3-R B) 1-Q, 2-P, 3-R
C) 1-R, 2-Q, 3-P D) 1-R, 2-P, 3-Q
22. Planets do not twinkle because….. ( )
X) They are much closer to the earth
Y) They are seen as extended sources of light
A) X and Y are true
B) X and Y are false
C) X is false and Y is true
D) X is true and Y is false
23. Sidwick and Powell proposed VSPERT theory. Valence bond theory was suggested by ( )
A) Linus Pauling B) Lewis C) Kossel D) Pauli
24. This current passing through our body causes spasms ( )
A) P B) S C) Q D) R
25. A few drops of ethonoic acid are added to solid sodium carbonate. The possible results of the reaction are ….. ( )
A) A hissing sound is evolved
B) Brown fumes are evolved
C) Brisk effervescence occurred
D) A pungent smelling gas is evolved
26. A soft iron bar is introduced inside a current carrying solenoid. The magnetic field inside the solenoid ….. ( )
A) increases B) remains constant C) decreases D) becomes zero
27. Arrange the following in the descending order of their pH value. ( )
i) Coffee ii) Milk iii) Orange juice iv) Blood
A) i, ii, iii, iv B) iv, ii, iii, i C) ii, iii, iv, i D) iv, ii, i, iii
28. A convex lens is made up of three different materials as shown in the figure. The
number of images formed by it for an object is ……… ( )
A) 3 B) 2 C) 1 D) 4
29. Substance having highest specific heat is …….. ( )
i) Water ii) Ice iii) Sea water iv) Kerosene
A) i B) i and ii C) iii D) ii and iv
30. During electrolysis of sodium chloride ….. gas is liberated at the anode ( )
A) Oxygen B) Nitrogen C) Chlorine D) Hydrogen
31. A conductor is moving with a speed of 10 m/s in the direction perpendicular to the direction of magnetic field of induction 0.8 T. If it induces an e.m.f of 8 V between the ends of the conductor, then the length of the conductor is ……… ( )
A) 2 m B) 4 m C) 1 m D) 0.5 m
32. Which of the following compounds will not give addition reaction? ( )
A) Ethene B) Ethyne C) Propane D) Methane
33. A neutralisation is an example for ….. reaction. ( )
A) Decomposition B) Combination C) Displacement D) Double decomposition
Answers : PART – B
14-C
15-C
16-A
17-C
18-C
19-A
20-C
21-D
22-A
23-A
24-B
25-B
26-A
27-D
28-A
29-A
30-C
31-C
32-D
33-D.