SSC Science Board Paper

Std.X:SCI

EMINENT LEARNING

01		BOARD QUESTION PAPER OCT 2014
	Time: 3 Hours		Max. Marks: 80

    

Notes:(1) Use the same answer-sheet for Section A and Section B.

           (2) Draw well-labelled diagrams wherever necessary.

           (3) All Questions are compulsory.

           (4) Students should write the answers of questions in sequence.

 

                                                                  SECTION A

Q1. A. (a) Rewrite the following statements with suitable words in the blanks:(2)

(i)          Elements showing properties of both metals and non-metals are known as _________  

(ii)         The device used for producing current is called ___________

(2) Rewrite the following table so as to match second and third column with

     first column. (2)

Column I	Column II	Column III
(i) Myopia	Old age problem	Bifocal lens
(ii) Presbyopia	Nearsightedness	Concave lens.

(3) State whether the following statements is True or False: (1)

     (i)The SI unit of charge is the coulomb.

(B) Choose the correct alternative and rewrite the following sentence. (5)

(1) Phenolphthalein is ___________ type of indicator.

     (a) Natural Indicator   (b) Universal Indicator  (c) Synthetic Indicator 

     (d) None of the   above.

(2) Which of the following is not required to find the pH of a given solution?

     (a) pH paper   (b) Litmus paper  (c)  Standard pH value chart.  

     (d) Universal indicator.

(3) When the resistance of a conductor increases, the current will ________.

     (a) increase  (b) decrease  (c)  remain the same  (d) None of the the above.

(4) If three resistors 2 ohms, 3 ohms and 4 ohms are connected in series, then

     the effective resistance in the circuit will be _______ ohms.

     (a) 9  (b) 6  (c) 1  (d) 5

 (5) A ray of light strikes the glass slab at an angle of 50⁰. Then the angle of

      incidence will be ______________.

     (a) 50⁰   (b) 90⁰  (c) 60⁰  (d) 40⁰

2. Answer the following questions: (Any five) (15)

1. State Mendeleev’s periodic law.

2. Name two elements having a single electron in their outermost shell.

3. Grills of doors and windows are always painted before they are used? Give reason.

4. State the laws of refraction.

5. Draw a well labelled diagram to show refraction of light through a glass slab.

6. Name two human diseases caused due to water pollution.

3. Answer the following: (any five) 15

1. What is corrosion? Do gold ornaments corrode? Justify.

2. If pH value of solution ‘A’ is 8, pH value of solution ‘B’ is 7 and pH value of solution

    ‘C’ is 5.5 then:

   (i) Which solution is acidic?

   (ii) Which solution is basic?

   (iii) Which solution is neutral?

3. Write three safety measures in using electricity.

4. What do you mean by dispersion? Name the different colours of light in the

    proper sequence in the spectrum of light.

5. State the principles of the electric motor and electric generator.

6. State the role of citizens in pollution control. Give three efforts taken in order

    to reduce pollution.

4. Answer any one of the following questions:  

A. (1) What should I choose ___________________

 a. for decreasing resistance in a circuit.   

    (Resistors in series / Resistors in parallel)

b. for getting protection from electric current.

    (Nickel / Ebonite)

c. to measure the current in the circuit?

   (Ammeter/ Voltmeter)

(2) My mother was operating washing machine on Sunday morning. Suddenly, she saw a spark coming out of the electric board and the electric current in the house failed. An electrician was called to look into the matter. What should he have noticed.

(B) (1) In which equipment/s do you find ___________________

      (a) a concave mirror.

      (b) a convex lens

       (c) reflecting mirrors?

(2) My grandfather uses a bifocal lens in his spectacle. Explain why.

                                                      Section B

5. A. (1) Fill in the blanks and rewrite the statements: (3)

i. The general formula of Alkane is _________________.

ii. ________ is the largest gland in the body.

iii. The loss of water from the plants is known as ______.

2. State whether the following statements are True or False:

i. The daughter cells produced by asexual reproduction are genetically identical to the parent cell.

ii. In sexual mode of reproduction, greater diversities are generated.

B. Choose the correct alternative and rewrite the following:

1. Ethanoic acid ________________________

    a. is odourless    b. has a pungent smell   c. has smell of rotten egg.

    d. has a vinegar    like odour.

2. Which of the following is a mode of asexual reproduction?

    a. Fission b. Budding  c. spore formation   d. All of the above.

3. In hydra the type of reproduction is ___________.

    a. Binary fission   b. Budding  c. Multiple fission  d. None of the above.

4. Which of the following is not essential for photosynthesis?

   a. Oxygen b. Carbon dioxide  c. Sunlight d. Chlorophyll

5. Ankita bought some Glucose Powder. She felt is was adulterated with starch powder.

    How would she test it?

    a. by sieving  b. by dissolving it in water  c. by iodine test  d. all of the above.

6. Answer the following sub questions: (any five) (10)

1. Sodium is stored under kerosene. Give reason.

2. What are hydrocarbons? Give one example.

3. Distinguish between: Autotrophic nutrition and Heterotrophic nutrition.

4. Draw a well labelled diagram of the ‘Liver’.

5. What is pollination? Mention its types.

6. Define Heredity. Give two examples.

7. Answer any five of the following sub questions:  (15)

1. Write three methods of preventing rusting of iron.

2. Draw a well labelled diagram of extraction of Aluminium. Write the anode reaction

    in electrolytic reduction of Alumina.

3. What are functional groups? Name any two compounds containing functional groups.

4. Classify the following as voluntary and involuntary movements:

i. Coughing

    ii. Food getting digested.

    iii. Moving a table

    iv. Beating of heart.

    v. Function of the kidneys.

    vi. Flying a kite.

5. Explain the two examples, movements in plants which are growth independent.

6. What is meant by vegetative propagation? Name the vegetative parts through

    which Potato and Bryophyllum reproduce.

8. Write the answer of any one questions given below:

1. (a) How many pairs of autosomes and pairs of sex chromosomes are present in

    a human being?  (2)

   (b) Which chromosomes are present in Female? (1)

   (c) Which chromosomes are present in Male? (1)

   (d) How does sex determination take place in human beings? (1)

2. State the powders of Maharashtra Pollution Control Board (MPCB) to control the Air Pollution. (5)

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