Action of Heat on Substances

IMPORTANT

Action of Heat on Substances: Overview

In this topic, we will understand the action of heat on given substances. It briefs on both physical and chemical changes occurring due to heating. It also covers entire procedure of the experiment along with the observations.

Important Questions on Action of Heat on Substances

HARD
IMPORTANT

What is flame test?

EASY
IMPORTANT

Calcium metal burns with blue flame.

MEDIUM
IMPORTANT

Describe the flame test for calcium.

EASY
IMPORTANT

_____ metal burns with orange-red flame.

EASY
IMPORTANT

Orange-red indicates the presence of:

EASY
IMPORTANT

Blue-green flame is an indication of the presence of _____ions.

EASY
IMPORTANT

Blue-green flame indicates the presence of:

EASY
IMPORTANT

The pale green flame is due to the metal ions of: 

MEDIUM
IMPORTANT

Pale green flame is an indication of the presence of _____ions.

MEDIUM
IMPORTANT

Describe the flame test for barium.

EASY
IMPORTANT

Barium metal burns with red flame.

EASY
IMPORTANT

_____ metal burns with pale green flame.

EASY
IMPORTANT

A metal burns with a yellow flame is; 

EASY
IMPORTANT

Flame test is not given by :

EASY
IMPORTANT

Which metal ion imparts brick-red colour to the flame?

MEDIUM
IMPORTANT

State the colour of the residue obtained on cooling when copper carbonate is heated.

EASY
IMPORTANT

Which one of the following does not impart colour to the flame?

EASY
IMPORTANT

In the following reactions, find compound A which imparts a golden yellow color to the Bunsen flame.

Aaq+ZnBg
Aaq+c Δ PH3
Aaq+NH4ClDg

 

EASY
IMPORTANT

What could be the metal, if a chemistry student takes a small amount of paste of metallic salt on clean platinum wire loop of the salt with concentrated HCl and keeps it in a non-luminous bunsen flame, the colour of the flame changes to grassy green ?

 

EASY
IMPORTANT

  • A chloride dissolves appreciably in cold water.
  • When placed on a platinum wire in Bunsen flame, no distinctive colour is noticed.

The cation which shows both of the above properties is