Strength of Acids and Bases
Trending Questions
Difference between strong acid and weak acid.
- Iron
- Sodium
- Magnesium
- Copper
What is the observation when two drops of phenolphthalein are added to the solution obtained after the reaction of sodium with water? Justify your answer.
What will you observe when -
(iv) blue litmus is introduced into a solution of ferric chloride?
- Copper sulphate
- Silver nitrate
- Sulphuric acid
- Distilled water
Drinking water mainly contains small amounts of salts of ___________ , ___________ and __________ metals.
(a) What happens when a dilute acid reacts with a metal oxide? Explain with the help of an example.
(b) Do metal oxides react with bases too? If yes, give an example.
- Oxygen
- Chlorine
- Hydrogen
Identify Y in the reaction given below.
Zinc + Hydrochloric acid→Zinc chloride + Y
- Y:- Oxygen
- Y:- Hydrochloric acid
- Y:- Hydrogen
- Y:- Nitrogen
Which of the following metals reacts with both acid and hot concentrated alkalis to form hydrogen gas:
Sodium (Na)
Zinc (Zn)
Aluminium (Al)
Lead (Pb)
I. dilute hydrochloric acid and
II. aqueous sodium hydroxide.
The ratio of the volumes of H2 evolved in these two reactions is:
- 1:2
- 1:1
- 1:4
- 2:1
Which acid among the following is not used to produce hydrogen gas even in its dilute form on reacting with metals:-
Hydrochloric acid
Nitric acid
Sulphuric acid
Phosphoric acid
What is the observation when two drops of phenolphthalein are added to the solution obtained after the reaction of sodium with water? Justify your answer.
- HCOOH
- HCl
- H2SO4
- HNO3
Why acid is added to water for its electrolysis?
- oxide
- hydroxide
- bicarbonate
- MgCl2(aq)+H2O(l)
- Mg(OH)2(aq)+H2O(l)+Cl2(g)
- MgCl2(aq)+H2(g)
- MgCl2(aq)+H2(g)+O2(g)
- Silver nitrate
- Sulphuric acid
- Copper sulphate
- Distilled water
- It does not ionize
- They are not covalently bonded
- Many bonds can be covalent in one situation and ionic in another
- None of the above
- Water
- Carbon Dioxide
- Oxygen
- Hydrogen
- CaCO3 + H2SO4
- K + HCl
- NaOH + H2SO4
- Cu + HCl