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प्रश्न
Name the gas evolved when dilute HCl reacts with sodium hydrogencarbonate. How is it recognised?
उत्तर
Carbon dioxide gas is liberated when dilute hydrochloric acid reacts with sodium hydrogen carbonate.
When the gas liberated in the reaction is passed through lime water, lime water turns milky or a white precipitate of calcium carbonate is formed. This confirms that the gas is carbon dioxide.
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संबंधित प्रश्न
When a piece of limestone reacts with dilute HCl, a gas X is produced. When gas X is passed through lime water then a white precipitate Y is formed. On passing excess of gas X, the white precipitate dissolves forming a soluble compound Z.
- What are X, Y and Z?
- Write equations for the reactions which take place:
- When limestone reacts with dilute HCl.
- When gas X reacts with lime water to form white precipitate Y.
- When excess of gas X dissolves white precipitate Y to form a soluble compound Z.
What happens to the H+ ions, of the solution, when an acid is neutralised?
Name a sodium compound which is a constituent of many dry soap powders.
Write balanced equation to satisfy the following statement:
\[\ce{Acid + Sulphite or bisulphite -> Salt + water + sulphur dioxide}\]
State one observation for each of the following :
A small piece of zinc is added to dilute hydrochloric acid
Out of three metals P, Q and R, P is less reactive than Q and R is more reactive than P and Q both. Suggest an activity to arragne P, Q and R in order of their decreasing reactivity.
Acid mixed with base forms ______.
State whether the following statements are true or false. Correct the false statements.
Lemon water is basic in nature.
______ contain one or more replaceable hydrogen atoms.
Complete the following equation.
CaO + H2SO4 → ______ + H2O
