PHYSICS CH3 Fluids — Science STD 9 — Question

CH _4 \text { and } NH _3 \text {, are not acids. }

What is a constellation?

Correct the wrong statements.

1. Ionic compounds dissolve in non polar solvents.
2. Covalent compounds conduct electricity in molten or solution state.

What are the end products of digestion of starch, proteins and fats respectively?

What are the s-block elements?

Relate the names of the following scientists with the statements given below. (Mendeleev, Newlands, Dobereiner). a) Arranged elements into groups containing three elements each. b) Arranged elements in a group of seven with increasing atomic masses and eighth elements with similar properties kept below the first like eight note in an act of music. c) Arranged elements in the increasing order of atomic mass

What is pasteurization?

Why is meiosis called reductional division and mitosis as equational division?

Two medium with refractive index 1.31 & 1.50 is given. In which case (i) Bending of light is more and (ii) speed of light is more.

Higher Order Thinking Skill.

There are 3 plants A, B and C. The flowers of A open their petals in bright light during the day but closes when it gets dark at night. On the other hand, the flowers of plant B open their petals at night but closes during the day when there is bright light. The leaves of plant C fold up and droop when touched with fingers or any other solid object.

1. Name the phenomenon shown by the flowers of plant A and B.
2. Name one plant each which behaves like the flowers of plant A and B. 
3. Name the phenomenon exhibited by the leaves of plant C. 
4. Name the plant which behaves like the leaves of plant 'C'?