Question No : 1
The chemial name of Uria is
Question No : 2
Earth's seasons are caused by which of the following?
Question No : 3
Which of the following parts of the sun is easily visible only during a total solar eclipse?
Question No : 4
Permanent hardness of water can be removed by adding
Question No : 5
According to Daltons atomic theory the smallest particle which can exist independently is
Question No : 6
Brass gets discoloured in air due to the presence of which gas in air
Question No : 7
The most important ore of Aluminium is