Question

Fill in the blanks.
(a) Phosphorus is a very _____________ non-metal.
(b) Metals are _____________ conductors of heat and _____________ .
(c) Iron is _____________ reactive than copper.
(d) Metals react with acids to produce _____________ gas.

NCERT Class VIII
Science - Main Course Book

Chapter 4. Materials: Metals and Non-metals

Answer 1

( a ) ⇒ reactive

( b ) ⇒ good ,  electricity

( c ) ⇒ more

( d ) ⇒ hydrogen 

Answer 2

1 Phosphorus is a very  reactive  non-metal.
2 Metals are good  conductors of heat and  electricity .
3 Iron is more  reactive than copper.
4 Metals react with acids to produce   hydrogen gas...

hope its help u..