Question

1 Which of the following is incorrect about plasma?
(a )Fluorescent tube and neon sign bulbs consist of plasma.
(b )The gas gets ionised when electrical energy flows through it.
(c) It consists of super-energetic and super-excited particles .
(d )The plasma glows with colour which does not depend upon nature of gas
2 . The colour of vapours formed on sublimation of iodine solid is
(a) Purple (violet)
(b) Colourless
(c) Yellow
(d) Orange
3 Under which of the following conditions we can boil water at room temperature?
a) At low pressure
(b) At high pressure
(c) At very high pressure
(d) At atmospheric pressure
​

Answer 1

Answer:

1) b

2)a

3)a

Explanation:hope it will help you

thanks

Answer 2

• 1. Which of the following is incorrect about plasma? d )The plasma glows with color which does not depend upon the nature of the gas. The color of the plasma glowing is dependent upon the kind of electrons present in the gas. It is different for different gases.

• 2. The color of vapors formed on sublimation of iodine solid is a) Purple (violet). Iodine has sublimation properties. Hence when it is heated it tends to form vapors that are purple/ violet in color.
• 3. Under which of the following conditions we can boil water at room temperature? a) At low pressure. The boiling point of water can be reduced by decreasing the pressure of the room. This is because pressure is inversely proportional to temperature.