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It consists of three cases followed by questions. There are a total of 12 questions (Q. No. 49 to 60 ) in this section. Attempt any 10 questions from this section. The first attempted 10 questions would be evaluated. P-Did not react eiter with cold or hot water but reacted with steam
Q- Reacted with hot water and the metal started floating
R - Reacted violently with cold water
S- Did not react with water at all
Based on the above observation answer the following:
Case-I:
A student, took four metalsP , Q , R , and S and carried out different experiments to study the properties of metals. Some of the observation were:
- All metal could not be cut with knife except metal R.
- Metal P combined with oxygen to form an oxideM 2 O 3 which reacted with both acids and bases.
- Reaction with water.
Q- Reacted with hot water and the metal started floating
R - Reacted violently with cold water
S- Did not react with water at all
Based on the above observation answer the following:
Case-I:
A student, took four metals
- All metal could not be cut with knife except metal R.
- Metal P combined with oxygen to form an oxide
- Reaction with water.
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Question : 57
Total: 60
What types of lenses must be L 1 and L 9 ?
Solution:
Both the images formed by lens L 1 and L 2 are magnified, but the concave lens always forms diminished image. Thus, both the lenses L 1 and L 2 are convex lenses.
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