Which of the following is the use of Silver nitrate?
Correct answer: B. used in photography and medicines
- A. used as mordant in dyeing
- B. used in photography and medicines
- C. used in making green pigments
- D. All of these
Explanation
Silver nitrate is widely used in photography because light converts silver halides into metallic silver, and it is also used medicinally, for example as an antiseptic or cauterizing agent. Green pigments are generally associated with copper compounds, so option c is the likely distractor and option b is the best answer.
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About Reactions of Group I Elements
Group I elements have one valence electron, so their reactivity increases down the group as ionisation energy decreases. Their reactions with water, oxygen, hydrogen and halogens produce hydroxides, oxides, hydrides and halides, while the behaviour of lithium differs from the heavier metals because of its small ionic size.
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