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CBSE Guess > Papers > Question Papers > Class X > 2009 > Science > Science

Q. 2. What is the shape of the graph between V and I, where V is the potential difference between the ends of an ohmic resistor and I is the current flowing through it? 1

Ans. The graph between V and I is a straight line passing through the origin.

Q. 3. State the first limitation of Mendeleev’s periodic table. 1

Ans. Limitation of Mendeleev’s periodic table:

  1. The position of isotopes could not be explained as isotopes are the atoms of the same element having similar chemical properties but different atomic masses.

Q. 4. Draw the structure of ethanol molecule.

Ans. Ethanol C2H5OH

Q. 5. A wire of resistance 20  is bent to form a closed square. What is the resistance across a  diagonal of the square?

Ans. Total resistance of the wire = 20
AB = BC = CD = AD

Resistance across AC is given by R

Science 2009 Question Papers Class X
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CBSE 2009 Question Papers Class X