CBSE Class 10 Science Question Paper 2006 (3)

CBSE Class 10 Science Question Paper 2006 (3). Students can download the last year question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

CIENCE AND TECHNOLOGY (Theory)

Outside — 2006

Q. 1. Name the product other than water formed on burning or etnanol in air.

Q. 2. How can you show that the magnetic field produced by a given electric current in the wire decreases as the distance from the increases?

Q. 4. Why does magnesium powder react much more rapidly than magnesium ribbon with dilute sulphuric acid? 

Q. 5. An object is placed at a distance of 12 cm in front of a concave mirror. It forms a real image four times larger than the object. Calculate the distance of the image from the mirror.

Q. 6.

    i. Draw a diagram to show how two resistors R₁ and R₂ are connected in series.

    ii. In a circuit if the two resistors of 5 ohm and 10 ohm are connected in series, how does the current passing through the two resistors compare?.

Q. 7. Name the type of nuclear reaction by which the Sun produces its energy. List two conditions which are present at the centre of the Sun responsible for this reaction. 

Q. 8. Given below are the pH values of four different liquids:  7.0, 14.0, 4.0, 2.0 Which of these could be that of

i. lemon juice,

ii. distilled water,

iii. 1 M sodium hydroxide solution,

iv. tomato juice?

Q. 9. Distinguish between natural and artificial satellites. To launch an artificial satellite in an orbit around the Earth what is the minimum:

i. Horizontal velocity required for the push?

ii. Height to lift the satellite from the ground? 

Q. 10.

i. Name the raw materials used in the manufacture of sodium carbonate by Solvay process.

ii. How is the sodium hydrogen carbonate formed during Solvay process separated from a mixture of NH4CL and NaHCO3?

iii. How is sodium carbonate obtained from sodium hydrogen carbonate?

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