Question

1) is used in salt to prevent goitre. 2)metals usually displace from acids. 3) phosphorous is very __ non- metal. 4)sodium is very reactive metal. T/F 5) non metals react to water. T/F 6) which is corrosion resistant (a) silver (b) iron (c) copper 7) which is not malleable and ductile (a) copper (b)sodium (c) iron 8) (a) magnesium (i) free state (b) Aluminium (ii) in fireworks (c) Gold (iii) wrap food

          1) ______ is used in salt to prevent goitre.
2)metals usually displace ______ from acids.
3) phosphorous is very ______ non- metal.
4)sodium is very reactive metal. T/F
5) non metals react to water. T/F
6) which is corrosion resistant
(a) silver (b) iron (c) copper
7) which is not malleable and ductile
(a) copper (b)sodium (c) iron
8) (a) magnesium
(i) free state
(b) Aluminium
(ii) in fireworks
(c) Gold
(iii) wrap food