৯৭৯১
To cook the food at a high mountain is difficult as compared to sea level because?
উত্তর
The boiling point of water deceases at the mountains
৯৭৯২
What happens while the light ray is in glass block but before it strikes the mirrored surface?
উত্তর
The frequency of the waves increases
৯৭৯৩
When oil is heated along with H2, in the presence of Ni catalyst, it forms fat, this process is called?
উত্তর
Hydrogenation