Question

Match List I with List II

LIST I		LIST II
A	Chlorophyll	1	\(Na _2 CO _3\)
B	Soda ash	2	\(CaSO _4\)
C	Dentistry, Ornamental work	3	\(Mg ^{2+}\)
D	Used in white washing	4	\(Ca ( OH )_2\)

• A. A-III, B-I, C-II, D-IV
• B. A-II, B-III, C-IV, D-I
• C. A-III, B-IV, C-I, D-II
• D. A-II, B-I, C-III, D-IV

Answer 1

The Correct Option is A

To solve this matching question, we need to correctly associate the items in List I with the corresponding items in List II based on their scientific or practical connection. Let's analyze each option:

1. Chlorophyll - \(Mg^{2+}\): Chlorophyll is the pigment responsible for the green color of plants and is crucial for photosynthesis. Magnesium (\(Mg^{2+}\)) is a central component of the chlorophyll molecule. Therefore, "Chlorophyll" matches with \(Mg^{2+}\).
2. Soda ash - \(Na_2CO_3\): Soda ash is the common name for sodium carbonate. Thus, "Soda ash" directly corresponds to \(Na_2CO_3\).
3. Dentistry, Ornamental work - \(CaSO_4\): Calcium sulfate (commonly in the form of plaster of Paris) is used in dentistry and for ornamental purposes due to its moldable properties. Hence, this pairs with \(CaSO_4\).
4. Used in white washing - \(Ca(OH)_2\): Calcium hydroxide is commonly used in whitewashing walls to improve brightness and sanitation. Therefore, "Used in white washing" is associated with \(Ca(OH)_2\).

Based on the analysis above, the matches are:

• A-III: Chlorophyll - \(Mg^{2+}\)
• B-I: Soda ash - \(Na_2CO_3\)
• C-II: Dentistry, Ornamental work - \(CaSO_4\)
• D-IV: Used in white washing - \(Ca(OH)_2\)

Thus, the correct answer is A-III, B-I, C-II, D-IV.