1. All planets move around the sun in elliptical orbits, with the sun being at rest at one focus of the orbit.
True
False
Answer: Option A
2. Atom is the smallest part of matter which takes part in chemical reactions.
True
False
Answer: Option A
3. When a body is immersed partly or wholly in a liquid, there is an apparent loss in weight of the body which is equal to the weight of liquid displaced by the body.
True
False
Answer: Option A
Explanation:
TRUE, it is Archimedes Principle.
4. Siphon will fail to work if
both its limbs are of unequal length
the temperature of the liquids in the two vessels are the same
the level of the liquid in the two vessels are at the same height
the densities of the liquid in the two vessels are equal
Answer: Option C
5. The incident ray, reflected ray and normal to the reflecting surface at the incident point all never lie in same plane.