Q1) The factor or process which best explains the rise of water from roots (100 mts) to the top of the tree is

A. Break down of ATP
B. Root pressure
C. Capillary rise of water in xylem
D. The cohesion of water and transpiration pull

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Q2) A side-view convex mirror of an automobile has a radius of curvature of 3 m. If a bus is located 5 m away from this mirror, then find:
a. position of the image V?
b. ratio of the 'size of the image' to the 'size of the object' m?

A. v=1.15 m, m=0.23
B. v=2.15 m, m=1.23
C. v=2.15 m, m=0.23
D. v=12.15 m, m=2.23

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Q3) Assertion : H₂CO₃ a strong acid.
Reason : A strong acid dissociates completely or almost completely in water.

A) If both the assertion and the reason are true and the reason is a      correct explanation of the assertion.
B) If both the assertion and reason are true but the reason is not a      correct explanation of the assertion.
C) Assertion is true but reason is false
D) Assertion is false but reason is true.

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Q4) Arrange the stages of nutrition of amoeba.

1) Ingestion    2) Engulfment
3) Digestion    4) Excretion
5) Absorption

A. 2,1,3,5,4          B. 1,2,3,5,4

C. 2,1,3,4,5          D. 3,4,1,2,5

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Q5) The clear sky appears blue because ______

A. Blue light gets absorbed in the atmosphere.
B. ultraviolet radiations are absorbed in the atmosphere.
C. violet and blue lights get scattered more than lights of all other colours by the atmosphere.
D. light of all other colours is scattered more than the violet and blue colour lights by theatmosphere.

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Q6) An object is placed at a distance of 8 cm from the concave mirror of a focal length of 5 cm. Find the position of the image from the mirror.

A. v = -13.00 cm          B. v = -13.333 cm

C. v = -10.333 cm          D. v = -9.333

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