PHYSICS CH 2 Motion — Science STD 9 — Question

Higher Order Thinking Skills.

When a ray of light passes from air into glass, is the angle of refraction greater than or less than the angle of incidence?

Convert the following units in metre.

List five characteristic features of fishes.

Write a note on functions of liver in digestion.

Complete the following table.

Atomic Number	Mass Number	Number of Neutrons	Number of Protons	Number of Electrons	Name of the Element
9	______	10	______	______	______
16	______	16	______	______	______
______	24	______	______	12	Magnesium
______	2	______	1	______	______
______	1	0	1	1	______

Enumerate the living and non-living characters of virus.

A boy travels a distance of 3m due east and then 4m due north.
(a) How much is the total distance covered?
(b) What is the magnitude of the displacement?

Identify the incorrect statement and correct them.

1. Like covalent compounds, coordinate compounds also contain charged particles (ions). So they are good conductors of electricity. 
2. Ionic bond is a weak bond when compared to Hydrogen bond.
3. Ionic or electrovalent bonds are formed by mutual sharing of electrons between atoms. 
4. Loss of electrons is called Oxidation and gain of electron is called Reduction.
5. The electrons which are not involved in bonding are called valence electrons.

Draw the cell diagram of Daniel cell. Give its reactions.

Describe the purpose, principle and working of Lactometer.