Question:
Assertion (A): Aquatic species are more comfortable in cold water than in warm water.
Reason (R): Solubility of oxygen gas in water decreases with increase in temperature.
Assertion (A): Aquatic species are more comfortable in cold water than in warm water.
Reason (R): Solubility of oxygen gas in water decreases with increase in temperature.
Reason (R): Solubility of oxygen gas in water decreases with increase in temperature.
Show Hint
Colder water → more O$_2$ → supports aquatic life.
Updated On: Jul 3, 2025
- Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
- Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
- Assertion (A) is true, but Reason (R) is false.
- Assertion (A) is false, but Reason (R) is true.
Hide Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Colder water holds more dissolved oxygen due to higher gas solubility at lower temperature.
So, fish and aquatic animals thrive better in cold water. Reason directly explains the assertion.
So, fish and aquatic animals thrive better in cold water. Reason directly explains the assertion.
Was this answer helpful?
0
0
Top Questions on Solutions
- In case of association, abnormal molar mass of solute will:
- An aqueous solution of 0.1 M HA shows depression in freezing point of 0.2°C. If $ K_f $ (H$_2$O) = 1.86 K kg mol$^{-1}$ and assuming molarity = molality, find the dissociation constant of HA.
- If equal volumes of AB and XY (both are salts) aqueous solutions are mixed, which of the following combination will give precipitate of AY, at 300 K?
- 20 mL of 2 M NaOH solution is added to 400 mL of 0.5 M NaOH solution. The final concentration of the solution is \(\_\_\_\_\_\) x \(10^{-2}\)M. (Nearest integer)
- 2 moles each of ethylene glycol and glucose are dissolved in 500 g of water. The boiling point of the resulting solution is: (Given: Ebullioscopic constant of water = $ 0.52 \, \text{K kg mol}^{-1} $)
View More Questions
Questions Asked in CBSE CLASS XII exam
Write a letter to the editor of a local newspaper expressing your concerns about the increasing “Pollution levels in your city”. You are an environmentalist, Radha/Rakesh, 46, Peak Colony, Haranagar. You may use the following cues along with your own ideas:
- CBSE CLASS XII - 2025
- Letter Writing
- Pass the necessary journal entries for the following transactions on the dissolution of a partnership firm of Vibha and Ajit after various assets (other than cash) and external liabilities have been transferred to Realisation Account:}
Creditors worth ₹ 46,000 accepted ₹ 9,000 cash and furniture of ₹ 32,000 in full settlement of their claim.
The firm had stock of ₹ 20,000. Ajit took over 40% of the stock at a discount of 10% while the remaining stock was sold for ₹ 18,000.
Vibha was appointed to look after dissolution work for which she was allowed a remuneration of ₹ 16,000. Vibha agreed to bear the dissolution expenses. Actual dissolution expenses ₹ 15,000 were paid by Vibha.
Ajit’s loan of ₹ 45,000 was settled at ₹ 42,000.
A machine which was not recorded in the books was taken over by Vibha at ₹ 23,000, whereas its expected value was ₹ 28,000.
The firm had a debit balance of ₹ 20,000 in the Profit and Loss Account on the date of dissolution.- CBSE CLASS XII - 2025
- Dissolution of Partnership Firms
- Draw a plot of frequency \( \nu \) of incident radiations as a function of stopping potential \( V_0 \) for a given photoemissive material. What information can be obtained from the value of the intercept on the stopping potential axis?
- CBSE CLASS XII - 2025
- Photoelectric Effect
- Kishore and Ranjan were partners in a firm sharing profits and losses in the ratio of 3 : 2. On 1stApril, 2024, their Balance Sheet was as follows :
Balance Sheet of Kishore and Ranjan as at 1stApril, 2024On the above date, Singh was admitted as a new partner on the following terms :Liabilities Amount (₹) Assets Amount (₹) Sundry Creditors 1,80,000 Cash in hand 30,000 General Reserve 20,000 Debtors 1,20,000 Capitals: Kishore – 6,00,000 Stock 1,50,000 Ranjan – 4,00,000 Furniture 1,00,000 Land and Building 8,00,000 Total 12,00,000 Total 12,00,000
(i) Singh will bring \(₹1,50,000\) as his capital and \(₹50,000\) as his share of goodwill premium.
(ii) The value of stock will be reduced by 10% and Land and Building will be appreciated by 10%.
(iii) Furniture will be revalued at \(₹90,000\).
(iv) A provision for doubtful debts will be created on sundry debtors at 5%.
(v) Investments worth \(₹10,000\) not mentioned in the Balance Sheet will be taken into account.
(vi) A creditor of \(₹1,000\) is not likely to claim his money and is to be written off.
Pass necessary journal entries for the above transactions in the books of the firm on Singh's admission.- CBSE CLASS XII - 2025
- Admission of a Partner
- Sophie is an escapist and a dreamer. Franz loves to miss school. Analyse the result of both these characters as a result of their attitude towards life. (Going Places, The Last Lesson)
- CBSE CLASS XII - 2025
- Literature
View More Questions