general knowledge 67

Test # 67

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1.
Who among the following scientists has been Choosen for the prestigious American Chemical Society Award-2015?


Corals take a long time to grow. Some corals only grow one centimeter in one year      .. More >>

oxidation number:
n.
1.the degree of oxidation of an atom or ion or molecule      .. More >>

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Take for Buy

Don't Say:
I went to the baker's to take bread.

Say:
I went to the baker's to buy bread.

Note:
Never use take m the sense of buy.
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Prepositions
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