Question

Answer the following questions (One word/one line)
a) How can we increase the boiling point of a liquid by changing pressure?
b) At which temperature ice and water can exist together?
c) Identify the name of the material which has no fixed shape but a fixed volume :
Wood, a piece of ion, oxygen and water.
d) How does camphor disappear without leaving any residue?
e) What is the chemical name of dry ice?
f) Why does the temperature remains constant during the change of state of matter?
g) Name the process due to which perfume spreads its smell.
h) 1 Kg of ice was heated to its melting point and then converted to water, but
temperature remained constant. Suggest a suitable reason for the same.
i) Why do gases exert pressure?
j) Why is diffusion of gases fastest?
k) What is the SI unit of temperature?
l) Sponge is a solid but it can be compressed. Why
m) What happens to the volume of water when the temperature decreases from 4o
C to
0o
C.
n) Mention the conditions under which gases can be liquified.
o) Name one property shown by ammonium chloride but not by sodium chloride.

Answer 1

Answer:

ans a)

Explanation:

Boiling point. ... Boiling point is the temperature that a liquid will change phase into a gas. Boiling occurs when the vapor pressure of a liquid is equal to the atmospheric pressure of the gas outside of it. Because of this, as the outside pressure changes so does the boiling point of the liquid.