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SSC SCIENCE JULY 2017 BOARD PAPER SOLUTION PART TWO

SSC SCIENCE JULY 2017 BOARD PAPER SOLUTION PART TWO

1. A. Answer the following sub - questions. [5]


1. Fill in the blanks and rewrite the completed statements: [2]

(i) 18th group in the periodic table contains elements that are all gases at room temperature.

(ii) Very fine particles mainly scatter blue light.

2. State whether the following statements are true or false: [2]


(a) Magnetic poles exist in pairs.
Ans. True.

(b) Global warming is the desirable aspect of the intensified greenhouse effect.
Ans. False

3. Considering the relationship in the first pair, complete the second paie: AgCl : White :: Cul2 : ___________

Ans. AgCl : White :: Cul2 : Brown

B. Rewrte the following statements by selecting the correct options. [5]


1. The S.I. unit of resistance is ____________
a. Ohm
b. Ampere
c. Coulomb
d. Volt.

2. If a ray of light strikes a glass slab at an angle of 600 with the surface of the slab, the angle of incidence must be __________________.

(a) 600
(b) 300
(c) 400
(d) 1200

3. ________________ is a decomposition reaction.

(a) Fe + S ⟶ Fes.
(b) HCl + NaOH ⟶ NaCl + H2O
(c) CuSO4 + Zn ⟶ ZnSO4 + Cu
(d) CaCO3 ⟶ CaO + CO2

4. 1 A = ____________ mA.

(a) 102
(b) 10-2
(c) 103
(d) 10-3

(5) The power of a convex lens is 2.5 dioptres. Its focal length is ______________.

(a) 40 cm
(b) 25 cm
(c) 1/40 cm.
(d) 1/25 cm

Q. II. Attempt any five of the following questions: [10]



(2) Give Scientific Reasons: Atomic size increases down the group.

(3) Distinguish between convex mirror and concave mirror.



(6) Suggest measures in the following situation: The use of fossil fuels in villages.

Q. III. Attempt any five of the following questions: [15]










Q. IV. Answer any one of the following questions:  [5]







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