SSC Action Plan – Test : I

DISTRICT COMMON EXAMINATION BOARD KADAPA-YSR Dist.

Date: 21-12-2018 Sub: Physical Science Part A &B Time: 2.45 hours Max Marks :40

Time : 2 Hours Max Marks : 30 M

Section-I

Note: i) Answer all the questions

ii) Each question carries ONE mark.

1. Madhavi told that Chlorine gas bleaches colour in the presence of water. Write an equation

for this reaction.

2. Write the mirror formula Explain the terms in it?

3. Lalitha noted the temperature of a furnace to be 18000C. Convert it into Kelvin scale.

4. What is the acid present in ants sting? Write its formula. What is the general method to be

practiced to get rid of pain if an ant bites you?

Section-II

Note: i) Answer all the questions

ii) Each question carries TWO mark.

5. Why do you feel hot even after you take bath with cold water and stay for some time in

bath room?

6. N₂ (వా) + O₂ (వా) → 2NO - Q

What information do you get from the above Chemical equation?

7.

Observe the figure and draw the diagram in your answer book showing the direction of

reflected ray.

8. Why does tooth decay start when the PH of mouth is lower than 5.5?

9. A person took spicy food and got acidity problem. Doctor advised him to take antacid tablets.

i) What type of substance is antacid?

ii) What reaction takes place in stomach after taking antacid tablet?

PART- A

F C

Section-III

Note: i) Answer all the questions 4X4=16M

ii) There is Internal choice for each questions, Answer each question in 8-10 sentences.

ii) Each question carries FOUR marks.

10. An object placed at 10cm from a Concave mirror formed a real image that is three times magnified. Find the image distance.

(OR)

The graph shows the values of temperature, when ice is heated till it becomes water

vapour. Observe the graph and answer the following questions. (Note: that the figure is not

completely quantitative and also not to the scale. It is purely Qualitative)

. a) At what temperature, Ice converts into water?

.1000C D E b) What does DE represent ?

. c) What is the range of temperature of liquid

. water? . . . . .

. d) Which part of the graph represents change of B C state from Ice to water

-20oC A

11. A shiny element X which is brown in colour changes to black on heating, what may be the element X and the black substance? How do you support your predictions.?

(OR) How would have been our day-to-day life with out spherical mirrors?

12. Suggest an experiment to prove that the rate of evaporation of a liquid depends on factors like surface area, humidity etc.

(OR) What is meant by water of crystallization ? Explain an activity to remove it from the molecules?

13. Draw a diagram showing the experimental setup to prove – “ Calcium Carbonate on heating changes into Calcium Oxide and Carbon dioxide”?

(OR) Draw a diagram depicting the electrical conductivity of acid solution.

Ice+ water

Ice Water + Water . vapour

Time: 30 Minutes Max marks: 10M Instructions : (i) Answer all the questions

. (ii) Each question carries ½ mark

(iii) Write the Capital letter (A,B,C,D) showing the correct answer for the . . . . . . following questions in the brackets provided against them.

14. 1 calorie = ___________ J [ ]

A. 8. 416 B. 6.418 C. 4.186 D. 1.486

15. Identify an alloy [ ] P : Bronze Q :Copper R : Steel A. P and Q B. Q and R C. P and R D. P , Q and R

16. Freezing point of water is [ ] A. 373K B. 0⁰C C. 100⁰C D. 100K

17. Small droplets of water that keep floating in air and forming a thick mist is called [ ] A. dew B. fog C. humidity D. None of these

18. Two identical vessels A and B are taken with 100ml and 200ml of water respectively. Water in . . which vessel evaporates quickly? . . w [ ] A. B B. A C. Both at once D. None of these 19. An Apple cut changes into brown colour gradually. The reason is [ ] A. Chemical double decomposition B. Oxidation C. Reduction D. Chemical decomposition

20. You might have observed the presence of a gas in chips packets. What is that gas? [ ] A. N₂ B. O₂ C. CO₂ D. Air 21. Burning of fire crackers is [ ] A. Neutralisation B. Reduction C. Oxydation D. None of these

22. A solution ‘A’ changed to yellow colour on adding methyl orange. What is the nature of A? A. Acid B. Base C. Neutral D. None of these [ ]

23. The ratio of volumes of Oxygen and Hydrogen released in electrolysis of water is A. 1:1 B. 2:1 C. 1:2 D. 4:1 [ ]

24. P: Real image can be caught on the screen Q: Virtual can be caught on the screen. [ ]

Choose the correct option A. Both P and Q are right B. Both P and Q are wrong C. P is right , Q is wrong D. P is wrong , Q is right

25. The mirror used by dentists to observe the teeth [ ]

A. Convex B. Concave C. Plane D. None of these 26. The relation between focal length (f) and radius of curvature (R) is [ ] A. R =2f B. R =f C. f =2R D. None of these

27. The geometrical centre of mirror is called [ ] A. Focus B. Pole C. Centre of Curvature D. None of these

PART-B

28. The mirror used for rear-view in vehicles [ ] A. Concave B. Plane C. Convex D. none of these 29. NaCl + Ag NO₃ → AgCl + NaNO₃ What type of chemical reaction is this? [ ] A. Chemical combination B. Chemical decomposition

C. Chemical displacement D. Double decomposition 30. The gas that is liberated when acid reacts with metals is [ ] A. O₂ B. H₂ C. N ₂ D. CO ₂

31. A solution turns red litmus blue, its pH is likely to be [ ]

A. 1 B. 4 C. 5 D. 10

32. Match the following p. Bleaching powder i. CaSO₄. 2H₂O [ ] q. Washing soda ii. NaHCO₃ r. Baking Soda iii. CaOCl₂ s. Gypsum iv. Na₂CO₃

A. p-i, q-ii, r-iii, s-iv B. p-iv, q-iii, r-ii, s-i C. p-iii, q-iv, r-ii, s-I D. p-iii, q-ii, r-iv, s-i

33. A solution was observed to be with PH

2. What is its nature? [ ] A. Acid B. Base C. Neutral D. We cant determine.

This Question Paper is prepared by – V.N. KRISHNA KISHORE, SA (PS), ZPHS Lebaka, Nandaluru(M)