What do you understand by the term ‘Scattering of light’? Which colour of white light is scattered the least and why?

Give one word or a phrase: The reaction in which carboxylic acid reacts with alcohol in the presence of conc. H₂SO₄ to form a substance having a fruity smell.

Reaction of zinc with potassium hydroxide solution.

Write three differences between summer monsoon season and retreating monsoon season.

Name the particles present in: Non- electrolyte

Name the following: An offshore oil field in the Gulf of Cambay.

Explain briefly any two Legislative and any two Executive powers of the President.

There are 25 discs numbered 1 to 25. They are put in a closed box and shaken thoroughly. A disc is drawn at random from the box. Find the probability that the number on the disc is:

1. an odd number
2. divisible
...

What do you mean by the term - Segregation.

What is rain water harvesting?

State your observations when

Concentrated Sulphuric acid is added to Sugar Crystals.

M and N are two points on the X axis and Y axis respectively. P (3, 2) divides the line segment MN in the ratio 2: 3. Find:

1. the coordinates of M and N
2. slope of the line MN.

In the electroplating of an article with silver, the electrolyte sodium argento cyanide solution is preferred over silver nitrate solution.

Give reasons why:

1. What are free electrons?
2. Why do they not leave the metal surface on their own?
3. How can they be made to leave the metal surface?

The pollutants that cannot be broken down to simple and harmless products.

Name the factor that determines:

1. Loudness of the sound heard.
2. Quality of the note.
3. Pitch of the note.