Advertisements
Advertisements
प्रश्न
Give reasons for the following.
Aluminium foils are used to wrap food items.
उत्तर
Aluminium foils are used to wrap food items because aluminium metal is malleable. Therefore, it can be beaten into thin foils.
APPEARS IN
संबंधित प्रश्न
Write a balanced chemical equation for the action of heat on aluminium hydroxide.
State why concentrated sulphuric acid is not used for drying ammonia gas
Name two metals which react violently with cold water. Write any three observations you would make when such a metal is dropped into water.
What are metals? Name five metals.
Name a metal used as a thermometric liquid
Name:
a metal whose oxide is reduced only by carbon
Write scientific reason.
The stainless steel vessels in Kitchen have copper coating on the bottom.
From the list of characteristics given below, select the five which are relevant to non-metals and their compounds:
- Ductile
- Conduct electricity
- Brittle
- Acidic Oxides
- Basic Oxides
- Discharged at anode
- Discharged at cathode
- Ionic chlorides
- Covalent chlorides
- Reaction with dilute sulphuric acid yields hydrogen
- 1, 2 or 3 valence electrons
- 5, 6, 7 valence electrons
(Write the five letters corresponding to the correct characteristics).
Gold and silver are used to make jewellery. Give reason
Which non-metal is essential for our life and all living beings?