Carnotite is an ore/mineral of _____.
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Which of the following is essential for the synthesis of thyroxin?
Which of the following is used in gunpowder?
What is the ratio of masses of hydrogen and oxygen in the water?
The percentage of nitrogen in the air is about
Atomic number of which of the following elements is greater than that of Aluminium?
If an atom has atomic number 10 and mass number 23, then what will be the number of protons and neutrons in an atom respectively?
Terylene is a condensation polymer of ethylene glycol and which acid?