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The minimum forest cover should be maintained at ⅓ of total geographical area.
The fossil of Archaeopteryx represents the evidence of origin of
Who proposed the 'Law of Octaves' in the periodic classification of elements?
Which of the following is correct regarding isobars?
I. They have different atomic numbers
II. The have same mass numbers
Which of the following is an example of a colloidal solution?
Which of the following vitamins is called a water-soluble vitamin?
The device which transfer the signal from low resistance region to high resistance region is –
Ball pen functions on the principle of :
Which chemical is used to generate light to weld metals?
Rod of which of the following metal is used in nuclear reactors to slow down the speed of the neutrons?
Which of the following metals forms an amphoteric oxide?
