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Q. The maximum number of covalent formed by nitrogen is
Q. Which among the following metals provides amphoteric oxide ?
Q. The pair of metals used in the manufacturing of stainless steel are
Q. Isotopes of the same elements have
Q. Which of the following is usually not an air-pollutant?
Q. The number of neutrons in dipositive zine ion (Zn2+, mass number 70 and atomic number 30) is
Q. Which type of molecule is CF4?
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