Questions

Isotopes have ______.

I. similar physical quantities and different chemical properties

II. different physical properties

III. similar chemical properties

Apart from proposing atomic theory, what did John Dalton researched on?

___ is the number of shells for elements of the 3rd period.

All dolls are windows.All bottles are windows.All cars are bottles.

1. All cars are windows

2. some cars are dolls

3. some windows are cars

Which among the above listed are true

Which ruler of Vijayanagar allowed the Portuguese to build a church in his empire?

Metals can be given different shapes according to our needs because they posses the properties of

Exposure to sunlight helps a person improve his health because

Washing soda is used ______.

I. for removing permanent hardness of water

II. for disinfecting drinking water

III. as a cleaning agent for domestic purpose