Anil Ahlawat Solutions for Chapter: Matter in Our Surroundings, Exercise 1: EXERCISES

Fill in the blanks $\mathrm{P}, \mathrm{Q}, \mathrm{R}$ and $\mathrm{S}$ left in the table with appropriate words.

Ritwik was given four inflammable substances $\mathrm{P}, \mathrm{Q}, \mathrm{R}$ and $\mathrm{S}$. He was asked to hand over them to Ramesh who was the resident of a hot area (temperature, $46°\mathrm{C}$). Ritwik collected the data about the substances as shown in the table. Which substances Ritwik should not carry to the hot area where Ramesh lives?

Choose the correct statements about plasma state.
I. The state consists of super energetic and super excited particles.
II. The particles of plasma state are in the form of ionised gases.
III. The plasma is created on stars.
IV. Colour of plasma glow depends on temperature of gas only.

Observe the given figure carefully.

Which of the following statements is incorrect?

The given apparatus is used to study the diffusion of a number of gases at the same temperature and pressure.

Which of the following pairs of gases would diffuse into the vacuum at the same speed? [Given: Atomic mass of $\mathrm{H}=1\mathrm{u}, \mathrm{C}=12\mathrm{u}, \mathrm{N}=14\mathrm{u}, \mathrm{S}=32\mathrm{u}, \mathrm{O}=16\mathrm{u}$]

Diagrams $\mathrm{W}, \mathrm{X}$ and $\mathrm{Y}$ show how the particles of a substance are packed at different temperatures.

The given graph shows the temperature changes which occur on warming the substance. In which region of the graph would all the particles be packed as in $\mathrm{Y}$?

Observe the given diagram showing the change in state carefully.

Which of the following is correct identification for processes $\mathrm{P}$ to $\mathrm{U}$?

Match column I with column II and select the correct option from the codes given below.