Haemoglobin has the highest affinity with which of the following?
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A change in which no new substances are formed is called _____________.
Nitric acid does not react with
Atomic number of which of the following elements is greater than that of Aluminium?
Which of the following is used in gunpowder?
Which of the following is a commercial source of energy?
The tenth element in the Newland's periodic classification resembles the
Pyrolusite is an ore/mineral of ___________.