Which of the following pairs is INCORRECT?
I. Haematite : Iron
II. Pitchblende : Copper
III. Monazite : Thorium
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Plants of which group are predominantly aquatic?
In Angiosperms, plant embryos in seed have structures called ______.
The vast amount of sea weeds present in oceans may produce an endless source of
According to ohm's law, which of the following is true?
Generally covalently bonded molecules ______.
I. have high boiling and melting point as compare to ionically bonded molecules
II. poor conductors of electricity
III. have weak intermolecular force
Ozone holes are more pronounced at the
Ozone holes are more pronounced at the polar regions of the earth.
The source of energy of the sun is
The transformation of Hydrogen atoms into Helium atoms with an emission of vast amount of energy is called nuclear fusion which is the source of energy for the Sun.
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