Q.

Select the incorrect statement.

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a

NaOH can be stored in a vessel made of Al

b

HNO3 can be stored in a vessel made of Be/Al alloy

c

HF can be stored in a vessel made of wax

d

HF attacks glass

answer is A.

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Detailed Solution

(1) Al reacts with NaOH thus Al-vessel cannot be used to store NaOH.(2) HNO3 makes Be-Al passive. Thus, it can be used to store HNO3.(3) HF does not react with wax, thus stored in the vessel made of wax.(4) HF attack CaSiO3, CaSiO3+6HF⟶CaSiF6+3H2ONa2SiO3+6HF⟶Na2SiF6+3H2O
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