✓ Board-verified↻ asked 2×
Science · 2024 · 3 marks
CBSE 2024 · Region 1 · Set 1 · Q28
(i)The pH of a sample of tomato juice is 4.6. How is this juice likely to be in taste ? Give reason to justify your answer.(ii)How do we differentiate between a strong acid and a weak base in terms of ion-formation in aqueous solutions ?(iii)The acid rain can make the survival of aquatic animals difficult. How ?
(i)
The pH of a sample of tomato juice is 4.6. How is this juice likely to be in taste ? Give reason to justify your answer.
(ii)
How do we differentiate between a strong acid and a weak base in terms of ion-formation in aqueous solutions ?
(iii)
The acid rain can make the survival of aquatic animals difficult. How ?
Marking-scheme solution
(i) The taste of tomato juice will be slightly sour; The pH $\displaystyle 4.6$ indicates that tomato juice is an acid and acids are sour in taste.
(ii) Acids that give more \(\displaystyle \mathbf{H}^{+}\)ions \(\displaystyle / \mathbf{H}_{\mathbf{3}} \mathbf{O}^{+}\)are Strong Acids Bases that give less \(\displaystyle \mathbf{O H}^{-}\)ions are Weak Bases.
(iii) Living animals can survive within a pH range of $\displaystyle 7.0$ to $\displaystyle 7.8$ . So, if the pH of river water becomes low due to acid rain \(\displaystyle (\mathbf{p H}<\mathbf{5} \cdot \mathbf{6})\), then survival of aquatic animals becomes difficult.
More from Acids, Bases and Salts
- Assertion: Concentrated nitric acid is diluted by adding water slowly to acid with constant stirring. Reason…2025 · asked 3×
- An aqueous solution turns red litmus blue. Excess addition of which of the following solution would reverse…2026 · asked 3×
- (i) A compound 'X' which is prepared from gypsum has the property of hardening when mixed with proper…2023 · asked 3×
- Which of the given option represents a family of salts?2025 · asked 3×
- Select a pair of natural indicator from the following:2024 · asked 3×
- In order to prepare dry hydrogen chloride gas in humid atmosphere the gas produced is passed through a guard…2025 · asked 3×
- Acid-base indicators can be used to distinguish between an acid and a base. Universal indicator, a mixture of…2025 · asked 3×
- Consider the following reactions: (i) Dilute hydrochloric acid reacts with sodium hydroxide. (ii) Magnesium…2025 · asked 3×
CBSE Class 10 Science past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.