Advertisements
Advertisements
प्रश्न
On adding dilute sulphuric acid to a test tube containing a metal ‘X’, a colourless gas is produced when a burning match stick is brought near it. Which of the following correctly represents the metal ‘X’?
विकल्प
Sodium
Sulphur
Copper
Silver
Advertisements
उत्तर
Sodium
Explanation:
The element X is sodium. When sodium metal reacts with sulphuric acid, sodium replaces the hydrogen ion, forming sodium sulphate and hydrogen gas. When a lit matchstick is brought close to the mouth of the hydrogen gas-filled test tube, it burns with a pop-up sound.
\[\ce{H2SO4 + 2Na -> Na2SO4 + H2}\]
APPEARS IN
संबंधित प्रश्न
Name two metals which will displace hydrogen from dilute acids, and two metals which will not.
What are amphoteric oxides?
Diamond : electric insulator : : _______ : electric conductor
Which one of the following metals does not react with cold as well as hot water?
Generally, metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of
Metals generally react with dilute acids to produce hydrogen gas. Which one of the following metals does not react with dilute hydrochloric acid?
Answer the questions based on the figure below:
- Which experiment setup is demonstrated in the figure?
- What do you conclude after the reactions? Name reaction.
Keerti added dilute Hydrochloric acid to four metals and recorded her observations as shown in the table given below:
| Metal | Gas Evolved |
| Copper | Yes |
| Iron | Yes |
| Magnesium | No |
| Zinc | Yes |
Select the correct observation(s) and give chemical equation(s) of the reaction involved.
Write a chemical equation showing the ionic products formed on dissolving potassium hydroxide in water.
