Matter and Its Nature

At $600 \mathrm{K}$, the root mean square $\left(\mathrm{rms}\right)$ speed of gas $\mathrm{X}$ (molar mass $=40$) is equal to the most probable speed of gas $\mathrm{Y}$ at $90 \mathrm{K}$. The molar mass of the gas $\mathrm{Y}$ is _____ $\mathrm{g} {\mathrm{mol}}^{–1}$. (Nearest integer)

Which is an example of matter according to physical state at room temperature and pressure.

Which of the following is compound?

Water changes into water vapour on heating. This process is known as:

Which of the following statements about a compound is incorrect?

Write the name of following compound.

${\mathrm{Na}}_2{\mathrm{PbO}}_2$

Change of state from liquid to solid is termed as:

 Differentiate between sublimation and melting.

Define the following terms.

Interconversion.

Which of the following is the most compressible substance?

Which of the following is not a mixture?

Which of the following is a chemical fertilizer?

One sample of air contains 0.03% CO₂ whereas another sample of air was found to have 0.02% CO₂. This illustrates that

Something that occupies . . . $A$. . . and has . . . $B$ . . . is called Matter.

Here $A$ and $B$ are

How would you separate the mixture of Ammonium chloride and sodium chloride?

Gases have ________.

Which of the following is compound?

Which of the following is incorrect statement for liquid?

The three states of matter are solid, liquid and gas. Which of the following statement is true about them

A bottle containing two immiscible liquids is given to you. They may be separated by using a