________ was the first Indian woman who travelled to the space.
Leela Bai
Fathima Beegam
Kalpana Chowla
Sarojini Naidu
What is the suitable method of separating higher impurities from a mixture.
Winnowing
Hand picking
Vaporisation
Filtration
The method used to separate the seeds from the fruit juice is
Sieving
Crystallization
Magnetic separation
The change in which the substance cannot be converted back into its
reversible
irreversible
undesirable
periodic change
Preparation of chapathi is ......
fast change
desirable change
reversible change
Release of compressed spring is ........
An irreversible change
a reversible change
a non - periodic change
Which of the following changes is a non - periodic change?
Heart beat
Earth quake
Occurence of day and night
Oscillation of pendulum
