Science Question Papesr

CBSE Continuous and Comprehensive Evaluation (CCE)

Sample Question Papers Solutions
Term 1 (April to September 2013)

Science
Class

OSWAAL BOOKS

CONTENTS l Solutions q Sample Question Paper 6 q Sample Question Paper 7 q Sample Question Paper 8 q Sample Question Paper 9 q Sample Question Paper 10

1 - 7 8 - 13 14 - 20 21 - 26 27 - 32

ll

SAMPLE QUESTION PAPER–6
Section-A
1. Moving charges / electric current / magnet (any two). 2. (i) To develop male secondary sex organs at puberty. 3. To create green house effect / to trap the solar heat. 4. (a) yellow (b) lead iodide / PbI2 (c) Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) ½+½ ½ 1 ½+½ 1

(ii) To develop male secondary sexual characters like bread , moustaches, deep voice etc. ½

5. Activity : Metal Q is added to salt solution of P. Q being more reactive ; displaces metal P from its salt solution. Chemical equation : Metal Q + Salt solution of P → Salt solution of Q + Metal P. Example : Zn Zinc + CuSO4 → ZnSO4 + Cu 1 Copper sulphate Zinc sulphate Copper 1

6. 1 volt is the potential difference between two points in a current carrying conductor when 1 joule of work is done to move a charge of 1 coulomb from one point to another. 1 Potential difference =
=

Work done (W) Charg e transferred (Q)
100 J =5 V 20C

1

7.

S

N
1

Properties : (i) In air, field lines start from N-Pole and end at S-Pole. (ii) 8. (i) (ii) No two magnetic field lines can ever intersect at any one point. Substance reduced = Fe2O3 Substance oxidized = CO Substance reduced = MnO2 Substance oxidized = Al (iii) Substance reduced = SO2 Substance oxidized = H2S ½×2=1 ½ ½ ½ ½ ½ ½

2 | CBSE (CCE) Term-I, Science Class–X 9. Procedure : • Set up the apparatus as follows :
Bulb Battery -

½
Switch

+

Beaker Na Ethyl alcohol Rubber cork

½

Take ethyl alcohol in the beaker such that the upper ends of the nail remain 2 cm above the level of alcohol. ½ • When the switch is turned on, the