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Q.

Match List-I with List-II and select the correct answer using the codes given below the lists:

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a

1

b

2

c

3

d

4

answer is B.

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Detailed Solution

a white pigment consisting essentially of zinc sulfide and barium sulfate. Lithopone is an insoluble mixture of barium sulfate and zinc sulfide that precipitates upon mixing solutions of barium sulfide and zinc sulfatePotassium superoxide is used in oxygen cylinders in space and submarines because it absorbs CO2​ and increases O2​ concentration according to the following reaction4KO2​+2CO2​→2K2​CO3​+3O2​
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