To lower the freezing point of water _______ is added.
sand
salt
sugar
sawdust
Water produces hydrogen and oxygen in the ratio of:
1 : 1
2 : 1
1 : 2
2 : 3
Which of the following is mostly used as a drinking water source by us?
Sea water
Glaciers
Ground water
Brackish water
Water is a _______ oxide.
acidic
neutral
basic
amphoteric
Specific heat of water is:
very high
very low
medium
sometimes high and sometimes low
Water is an extremely stable:
atom
element
mixture
compound
The percentage of water in human body is:
80%
70%
60%
50%
The density of water is greatest at:
0oC
4oC
100oC
37oC
Iron reacts with:
water
steam
cold water
hot water
Which of the following does not cause a depletion in the water table of a place?
Constructing factories and houses
Making concrete roads and floors
Deforestation
All of these
