Multiple choice

Which of the following statements is/are false? P. Devarda's alloy is consists of aluminium (44% – 46%), copper (49% – 51%) and zinc (4% – 6%) and used as reducing agent in analytical chemistry. Q. Manganin contains 86% magnesium, 12% tin and 2% nickel. R. Muntz metal is used as an architectural material and composed of 60% copper, 40% zinc and a trace of iron.

  1. Only P

  2. Only Q

  3. Only R

  4. Only P and Q

  5. Only Q and R
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Yes, it is the correct answer, as the statement is false. Manganin is a trademarked name for an alloy of typically 86% copper, 12% manganese and 2% nickel. Manganin foil and wire is used in the manufacture of resistors, particularly ammeter shunts, because of its virtually zero temperature coefficient of resistance value.

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