Haemoglobin has the highest affinity with which of the following?
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The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 3rd group and the 4th period?
Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in
A solution that is at equilibrium must be
Atomic number of an atom gives the number of which of the following ?
What is contained in Chlorophyll ?
Which of the following elements has the lowest melting point?
By which of the following processes are metals of high reactivity extracted from purified molten ore?
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