Q61 of 61 Page 4

Give reasons for the following 
i. silver is used in making mirrors
ii. aluminium is used to make electrical wires
iii. food stuffs with acid components should not be stored in aluminium utensils
iv. iron is used in constructing bridges and houses
v. graphite is used as an electrode in the dry cell
vi. Iron sheets are galvanized before use.

i) silver has a high reflecting power
ii) aluminium is a good conductor of electricity
iii) acids react with aluminium
iv) iron is a hard strong and rigid metal
v) graphite is a good conductor of electricity
vi) iron on exposure to atmosphere gets rusted.

More from this chapter

All 61 →
57 Write some chemical properties of non metals 58 List different uses of metals that you come across in everyday life 59 Mention the metals which are used for the following purpose i, domestic utensil and factory equipmentsii. jewelleriesiii. packaging food materialsiv. transport of electricityv. making of mirrorsvi. photography. 60 Choose appropriate words from the bracket and complete the statements
i. noble gases are found in (free state / compound forms) ii, non metals are generally (malleable / brittle)iii. potassium after combustion will form (Acidic oxide / basic oxide)iv. (iodine / bromine) has antiseptic propertiesv. German silver has (copper / silver) as major constituent’.