Question

3.To prevent rusting, a layer of ______ metal is applied on iron sheets. *

1 point

zinc

copper

aluminium

platinum

4.When the electric power is transmitted over a long distance,it is beneficial to have it in ______ form. *

1 point

circuit

DC

AC

none of these

5.Bronze is an alloy formed from____ *

1 point

70% copper and 30 %zinc

90%copper and 10%zinc

70%copper and 30 % tin

90%copper and 10%tin

​

Answer 1

Answer:

3. zinc metal

4. circuit

5.Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (such as aluminium, manganese, nickel or zinc) and sometimes non-metals or metalloids such as arsenic, phosphorus or silicon.

Answer 2

$\Answer$

Q1

to prevent rusting a layer of aluminium metal is applied on iron sheets.

Q2

4.When the electric power is transmitted over a long distance,it is beneficial to have it in DC form. 

Q3

bronze is an alloy form from 12.5% tin and 87.5 copper.