Question

Give Reason :-

a) Inver Steel is used in measuring taps ?

b) Copper does not displace hydrogen from dilute acid ? ​

Answer 1

Answer:

a)Invar tapes are available in lengths of 20, 30 and 100 metres. Invar tapes are used whey high degree of accuracy and precision in linear measurements is required such as measurement of base lines. Invar tapes are made of alloys of nickel and steel and have very low coefficient of thermal expansion.

Explanation:

b)Copper does not reacts with dilute sulphuric acid, liberating hydrogen because copper is lower in the electromotive series than hydrogen. A more reactive element can displace a less reactive element from its salt solution.