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प्रश्न
Using dilute sulphuric acid how would you differentiate between:
Sodium sulphide and sodium carbonate.
How would you identify the gaseous products evolved.
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उत्तर
Sodium sulphide → H2S
Na2S + H2SO4→ Na2SO4 + H2 S→Turns lead acetate paper silvery black
Sodium carbonate → CO2
Na CO + H9SO4 → Na2SO4 + H2O + CO2
CO2 — Turns lime water milky.
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संबंधित प्रश्न
From the knowledge of activity series, name a metal which shows the following properties:
It displaces hydrogen from hot water.
Hydrogen can be prepared with the metal zinc by using:
acid
Give an equation.
Hydrogen can be prepared with the metal zinc by using: alkali
Give an equation.
Give an equation to express the reaction between:
Steam and red hot iron
Thin strips of magnesium, copper, and iron are taken.
Write down what happens when these metals are treated as follows:
- Heated in presence of air
- Heated with dil.HCl
- Added to an aqueous solution of zinc sulphate.
Which metal is preferred for collecting hydrogen from Cold water? Write the balanced equation.
Which metal is preferred for collecting hydrogen from steam? Write the balanced equation for the case.
Write a balanced equation for the reaction named metal with (i) boiling water (ii) steam.
What do you observe when hydrogen gas is passed through a soap solution?
Name the following.
The salt formed when aluminium reacts with potassium hydroxide, during the preparation of hydrogen from alkalis.
