A) 100% solution of \[HCHO\]
B) 40% solution of\[HCHO\]
C) 60% solution of\[C{{H}_{3}}CHO\]
D) 40% solution of\[C{{H}_{3}}CHO\]
Correct Answer: B
Solution :
40% aqueous solution of formaldehyde is called formalin. It is used to preserve biological specimens.
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