General Science (Paper-1) S.S.C Public Examination – 2016 Model Paper (Important Questions):
1. Padma wears a spectacle. Her eyes began seem to be bigger in size.
a) What lens is there in her spectacles?
b) Which type of eye defect is she having?
Draw the ray diagram for this defect.
2. Raghava wants to know the wavelengths and the corresponding frequencies of primary colours. Collect the information and give it to him.
3. What role does specific heat play in keeping a watermelon cool for a long time after removing it from a fridge on a hot day?
4. How do you appreciate the role of the Buckminister fullerence in medicine?
5. In an atom the number of electrons in Mshell is equal to the number of electrons in the K and L shell. What is the atomic number of that element? Write its electronic configuration.
6. Using the periodic table, predict the formula of a compound formed between an element ‘x’ of group 13 and another element ‘y’ of
group 16.
7. What is thermite process? Mention its applications in daily life.
8. A bar magnet with north pole facing towards a coil moves as shown in figure. What happens to the magnetic flux passing through
the coil.
9. What is value of 1 KWH in Joules?
10. A Prism produces an angle of minimum deviation 30°. If its angle is 60°, find the refractive index of the material of the prism.
11. Why is it difficult to remove an electron from Mg+ ion compared to neutral Mg atom?
12. Name the acid present in vinegar.
13. What is the difference between roasting and calcination?
14. How do you verify the laws of reflection of light with an experiment?
15. Deduce an expression for the equivalent resistance of three resistors connected in parallel.
16. How do you appreciate the working of ciliary muscles in the eye?
17. Krishna is unable to identify the differences between evaporation and boiling. The teacher clarified the differences by asking some questions to Krishna. What are the questions asked by the teacher?
18. Write an equation for decomposition reaction where energy is supplied in the form of heat / light / electricity.
19. a) State and explain Pauli exclusion princple. According to this principle how many electrons can occupy an orbital?
b) State and explain Hund’s rule with an example.
20. Explain the formation of a) Ammonia molecule and b) Shape of water molecule keeping in view valence bond theory.
21. Describe the preparation and properties of ethanol.
22. Draw a neat diagram of electric motor and label the parts.
23. Draw a neat diagram of blast furnace and name the parts.
I. Write the capital letter showing the correct answer for the following questions in the brackets provided against them. 20 x 1/2 = 10
1. If the critical angle is 45°, then the refractive index of the medium is ……
A) 1.45 B) 2.414 C) 1.414 D) 1.5
2. The size of the object as perceived by an eye depends primarily on ……
A) Actual size of the object
B) Distance of the object from the eye
C) Aperture of the pupil
D) Size of the image on the retina
3. Flush bags containing potato chips will be filled with …… gas.
A) CO2 B) O2 C) N2 D) Cl2
4. Ice melts at …… K
A) 273 B) 373 C) 173 D) 473
5. The process involved in formation of water droplets outside a cold bottle is ……
A) Evaporation B) Sublimation C) Freezing D) Condensation
6. A bulb is rated 40 W, 120 V and another bulb is rated 60 W, 120 V. Which has more resistance?
A) First bulb B) Both bulbs C) Second bulb D) None of these
7. This compound is used in many cough syrups …….
A) Ethene B) Ethanal C) Ethane D) Ethanol
8. Which device converts mechanical energy to electrical energy?
A) Motor B) Battery C) Generator D) Inverter
9. Latent heat of vapourization of water is ……
A) 540 cal/gm B) 80 cal/gm C) 100 cal/gm D) 373 cal/gm
10. The SI unit of power is …..
A) Ohm B) Watt C) Ampere D) Volt
11. The maximum value of ‘l’ for n = 5 is ……
A) 1 B) 3 C) 2 D) 4
12. Saturated hydrocarbons participate in …… reactions.
A) addition B) substitution C) displacement D) combination
13. This is an olfactory indicator …..
A) onion B) methyl orange C) litmus D) phenolphthelin
14. The pH scale was invented by ……
A) Boyle B) Powell C) Sornesnsen D) Nyholm
15. Organic compound produced by wholer is…
A) Amide B) Phenol C) Aldehyde D) Urea
18. The noble element which is an exception for octet rule ……
A) Argon B) Helium C) Kryfton D) Radon
17. This is oxidation ……
A) Rusting of iron B) Respiration C) Rancidity D) All the above
Answers : 1-C 2-B 3-D. 4-A 5-D 6-A 19-C 8-C 9-A 10-B 11-D 12-B 13-A 14-C 15-D 18-B 17-D.
II. Fill in the Blanks : 5 x 1/2 = 2 1/2
21. Plaster of paris is also called ……
22. …… bond cannot exist independently.
23. ….. scales are used to measure electronegative values.
24. The refractive index of rock salt is ……
25. The specific heat of water is …… cal/gm °C
Answers : 21. Calcium sulphate hemihydrate, 22. Π, 23. Pauling and Millikan, 24. 1.54, 25.1
III. Match the following :
Group A Group B
26. Archimedes ( ) A) Quantum theory
27. Planck ( ) B) Electromagnetism
28. Dobereiner ( ) C) Shapes of molecules
29. Oersted ( ) D) Burning of Ships
30. C.V. Raman ( ) E) Triads
Answers : 26-D 27-A 28-E 29-B 30-C