Question

Given below are two statements, one is labelled as Assertion and the other is labelled as Reason
Assertion (A): The disadvantage of atomic absorption spectroscopy is the need for each element to be analysed. 
Reason (R): As atomic absorption spectrophotometer uses different halocathode lamp for each element, it is very specific for an individual element under test. 
In light of the above statements, choose the correct answer from the options given below:

• A. Both A and R are true and R is the correct explanation of A
• B. A is true but R is false
• C. A is true but R is false
• D. (b) Both A and R are true and R is NOT the correct explanation of A

Answer 1

The Correct Option is C

In this question, we are presented with two statements: an Assertion (A) and a Reason (R), and we need to evaluate whether these statements are true and if the Reason correctly explains the Assertion.

1. Assertion (A): "The disadvantage of atomic absorption spectroscopy is the need for each element to be analysed."
   • This statement is true. In atomic absorption spectroscopy (AAS), each element to be detected requires its own specific setup, including a unique light source (usually a hollow cathode lamp). Therefore, multi-element analysis can become cumbersome as each element needs to be analysed separately.
2. Reason (R): "As atomic absorption spectrophotometer uses different halocathode lamp for each element, it is very specific for an individual element under test."
   • This statement highlights the specificity of atomic absorption spectroscopy due to its use of different hollow cathode lamps (not “halocathode” which seems like a typographical error in the question). This specificity is indeed true; AAS is known for being highly specific to the element it is measuring.
   • However, this specificity is not directly a disadvantage when considering the need for analysis of each element separately, which is the main challenge mentioned in the Assertion.

Therefore, the Reason (R) does not correctly explain the disadvantage mentioned in the Assertion (A). While both statements independently are true, R does not provide a justification for A.

Hence, the correct answer is: A is true but R is false, in terms of the relationship where R does not effectively explain the disadvantage presented in A.