EASY
7th CBSE
IMPORTANT
Earn 100
Which of the following substances does not form a curdy precipitate when it is added to hard water?
50% studentsanswered this correctly
Important Questions on Chemistry in Daily Life
EASY
7th CBSE
IMPORTANT
Which among the following metals is the most suitable to be used as telecommunication cable?
EASY
7th CBSE
IMPORTANT
Which of the following can be said to provide instant energy?
EASY
7th CBSE
IMPORTANT
Which of the following applications of copper require refining of copper instead of alloying?
EASY
7th CBSE
IMPORTANT
Which of the following fertilisers cannot replenish nitrogen?
EASY
7th CBSE
IMPORTANT
Arrange the following steps in a sequence for the manufacture of borosilicate glass:
(1) Addition of ingredients like red lead, aluminium oxide, manganese oxide, chromium oxide, etc.
(2) Addition of broken pieces of glass.
(3) Mixing up of sand, limestone, sodium carbonate, aluminium oxide and borax in required proportions.
(4) Melting mixture in a glass tank furnace or pot furnace.
(5) Annealing process.
(6) Blowing of glass.
EASY
7th CBSE
IMPORTANT
Graphite is used in the manufacture of crucibles where a small quantity of metals can be melted. It is also used as electrodes. Which of the following properties of graphite is not exploited in these two given applications?
EASY
7th CBSE
IMPORTANT
Which of the following is the most suitable for the construction of a pillar?
EASY
7th CBSE
IMPORTANT
Assertion (A): Gold is used for making jewellery coins.
Reason (R): It is relatively a hard metal.
