Chemistry
Grade-11
Easy
Question
Match the following:
| A. Acids | (i) Unstable |
| B. Bases | (ii) Trigonal pyramidal |
| C. H+ ion | (iii) Release H+ ion |
| D. H3O+ | (iv) Release OH- ion |
- A – (i), B – (ii), C – (iii), D – (iv)
- A – (iv), B – (ii), C – (i), D – (iii)
- A – (iii), B – (iv), C – (i), D – (ii)
- A – (iii), B – (ii), C – (i), D – (iv)
The correct answer is: A – (iii), B – (iv), C – (i), D – (ii)
According to Arrhenius theory, bases are substances (or species) that generate hydroxyl ions OH- (aq).
According to Arrhenius theory, acids are the substances (or species) that dissociate (or break) in water to give hydrogen ions H+ (aq).
A proton, H+, is highly reactive. So, in an aqueous solution, it cannot exist freely.
Therefore, it combines with the oxygen atom of a water molecule (solvent) to give trigonal pyramidal hydronium ion, H3O+.
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