Advertisements
Advertisements
Question
Write the steps needed for flame test ?
Advertisements
Solution
Flame test :
1. Make a loop at the tip of the platinum wire and dip it in conc. HCl.
2. Put it on the non luminous part of the flame, to see if it gives colour. Repeat the process till it gives no colour to the flame.
3. Prepare a paste of the given salt in a watch glass using conc. HCl.
4. Load the loop of the wire with this prepared paste and introduce it into the non luminous flame of the bunsen burner and then observe the colour of the flame indicating different elements.
APPEARS IN
RELATED QUESTIONS
Name a black metallic oxide which reacts with hydrochloric acid to give a coloured solution.
Name two gases which chemically combine to form a liquid.
Name the chemical in which gold can be dissolved.
Complete and balance the following reaction, state whether dilute or conc. acid is used.
\[\ce{NH4OH + HCl -> }\]
Complete the following reaction and balance them.
Ca(HCO3)2 + 2HCl →
Name the following:
Acid used to extract glue from bones.
- Give only one suitable chemical test to identify the following gases.
- Ammonia
- Sulphur dioxide
- Hydrogen chloride
- Chlorine
- Carbon dioxide
- Oxygen
- Hydrogen
- Select a basic gas mentioned in Q. (a). How is the basic nature suspected?
- Select acidic gases from the gases mentioned in Q. (a). How is the acidic nature suspected?
- The two gases A and B are bleaching agents. A is greenish-yellow and bleaches due to its oxidizing property while B is a colourless gas that bleaches due to reduction. Identify A and B?
- Which gas turn blue cobalt chloride paper light pink? Give one similarity in the test between
- Cl2 and HCl
- SO2 and CO2.
Convert Hydrochloric acid to nascent chlorine.
Convert hydrochloric acid to nascent chlorine.
Complete and balance the following reaction, state whether dilute or conc. acid is used.
NH4OH + HCl ⟶
