Class 10 > PYQ SCIENCE > 2012 > SET C

2012

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Q2
State one role of ciliary muscles in the human eye.

Q4
What is the colour of the clear sky during day-time? Give reason for it.

Q5
Why do all the elements of the (a) same group have similar properties, (b) same period have different properties?

Q7
Name the oxidising agent used for the conversion of ethanol to ethanoic acid. Distinguish between ethanol and ethanoic acid on the basis of (i) litmus test, (ii) reaction with sodium hydrogen carbonate.

Q8
State the meaning of inherited traits and acquired traits. Which of the two is not passed on to the next generation? Explain with the help of an example.

Q9
A 5 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 12 cm. The distance of the object from the lens is 8 cm. Using the lens forumla find the position, size and nature of the image formed.

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