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प्रश्न
If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
विकल्प
Wash the hand with saline solution
Wash the hand immediately with plenty of water and apply a paste of sodium hydrogen carbonate
After washing hand with plenty of water, apply solution of sodium hydroxide on the hand
Neutralise the acid with a strong alkali
उत्तर
Wash the hand immediately with plenty of water and apply a paste of sodium hydrogen carbonate
Explanation -
Washing the hand initially with plenty of water gives partial relief from burning sensation. The paste of sodium hydrogen carbonate completely neutralises the effect of the acid.
APPEARS IN
संबंधित प्रश्न
| Column A | Column B | ||
| i | eosin | 1 | losing hydrogen |
| ii | oxidation | 2 | synthetic indicator |
| 3 | losing oxygen | ||
| 4 | natural indicator |
A solution reacts with zinc granules to give a gas which burns with a 'pop' sound. The solution contains:
(a) Mg(OH)2
(b) Na2CO3
(c) NaCl
(d) HCl
Define an acid and a base. Give two examples of each.
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Explain why, sodium hydrogencarbonate is used as an antacid.
Write the chemical formula of washing soda. How can it be obtained from baking soda? List two industries in which washing soda is used for other purposes than washing clothes.
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- The temperature of the solution increases
- The temperature of the solution decreases
- The temperature of the solution remains the same
- Salt formation takes place
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What happens when nitric acid is added to egg shell?
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