Two statements are given below and these are labelled as Assertion (A) and Reason (R).
Assertion (A): Vitamin C is destroyed by heating.
Reason (R): Vitamin C is water-soluble and heat-sensitive.
Select the correct answer from the following options:
Analyzing Vitamin C Stability When Heated
This question asks us to evaluate two statements, an Assertion (A) and a Reason (R), concerning Vitamin C and the effect of heating.
Evaluating Assertion (A): Vitamin C is Destroyed by Heating
Assertion (A) states that Vitamin C is destroyed by heating. This statement is scientifically accurate. Vitamin C, also known as ascorbic acid, is sensitive to heat and prolonged exposure can lead to its degradation. This is a crucial point when considering cooking methods, especially boiling, as much of the Vitamin C can be lost into the cooking water or broken down by the heat itself.
Evaluating Reason (R): Vitamin C is Water-Soluble and Heat-Sensitive
Reason (R) states that Vitamin C is water-soluble and heat-sensitive. This statement is also true.
- Water-Solubility: Vitamin C dissolves easily in water. This property contributes to its loss during cooking processes where food is boiled or steamed in large amounts of water.
- Heat-Sensitivity: As mentioned earlier, Vitamin C breaks down when exposed to heat. This sensitivity means that high temperatures, especially over extended periods, significantly reduce the vitamin's content in food.
Connecting Reason (R) to Assertion (A)
The question requires us to determine if Reason (R) correctly explains Assertion (A). Let's see how the properties mentioned in (R) cause the effect described in (A):
- Assertion (A) says Vitamin C is destroyed by heating.
- Reason (R) explains *why*: because Vitamin C is heat-sensitive.
The fact that Vitamin C is heat-sensitive directly explains why heating destroys it. The water-soluble nature also contributes to its loss during certain cooking methods, but the primary reason for its destruction *by heat* is its sensitivity to temperature.
Analyzing the Options
Based on our analysis:
- Both Assertion (A) and Reason (R) are true statements.
- Reason (R) provides the correct scientific basis (heat-sensitivity) for why Assertion (A) is true (destruction by heating).
Therefore, the option that states both are true and (R) is the correct explanation of (A) is the accurate choice.
Important Questions from Assertion and Reasons (Notes)
- Given below are two arguments.
(I): A valid deductive argument that also has all true premises is called a sound argument
(II): A strong inductive argument that has all true premises is called a cogent argument
In the light of the above statements, choose the most appropriate answer from the options given below - Given below are two statements one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A A sample survey is usually extensive in scope
Reason R Therfore, both in the number of cases included and in the manner of their selection, it has to be adequately and faithfully representative of a larger population. - Select the option that is true regarding the following two statements labelled Assertion (A) and Reason (R).
Assertion (A): A rubber band is a solid because it regains its original shape when the stretching force is removed.
Reason (R): Solids are rigid and have negligible compressibility. - Two statements are given below. One is Assertion (A) and the other is Reason (R). Choose the correct answer from the options given for these statements.
Assertion (A): Properties of a compound are different from those of its constituent elements.
Reason (R): Compounds are formed by chemical combination of elements in a fixed ratio. - Which of the following statements are correct?
(i) Solid $CO_2$ is called dry ice.
(ii) Solid $CO_2$ changes directly into gas at 1 atm pressure.
(iii) Pressure and temperature can change the state of matter.
(iv) Solid $CO_2$ melts into liquid $CO_2$ before becoming gas.
