Advertisements
Advertisements
प्रश्न
What is the difference between : An alkali and a metal hydroxide?
Advertisements
उत्तर
| An alkali | Metal hydroxide |
| An alkali is a basic hydroxide which when dissolved in water produces hydroxyl (OH-) ions as the only negatively charged ions. | Metal hydrooxide are generally bases which have a metal atom bonded to a hydroxide ion (OH-) |
| Example : NaOH, KOH | Examples: Mg(OH)2 |
APPEARS IN
संबंधित प्रश्न
A white shirt has a yellow stain of curry. When soap is rubbed on this shirt during washing, the yellow stain turns reddish-brown. On rinsing the shirt with plenty of water, the reddish-brown stain turns yellow again.
Explain the changes in colour of this indicator which take place during washing and rinsing the shirt.
The soil in a field in highly acidic. Name two materials which can be added to this soil to reduce its acidity. Give the reason for your choice.
The salt which will give a neutral solution on dissolving in water will be:
(a) CH3COONa
(b) NH4Cl
(c) KCl
(d) Na2CO3
Give two examples of the following:
oxy-acid
Give two examples of the following:
hydracids
Give the name and formula of two : Volatile acids
Explain, all alkalis are bases but all bases are not alkalis.
What happens when a solution of an acid is mixed with a solution of a base in a test tube?
(i) Temperature of the solution decreases.
(ii) Temperature of the solution increases.
(iii) Temperature of the solution remains the same.
(iv) Salt formation takes place.
State whether the following statement is true or false. Correct the false statement.
A compound if acidic will turn all indicators red.
The Acid secreted in our stomach is ______.
