Which of the following elements never show positive oxidation num

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331.

Which of the following elements never show positive oxidation number?

  • O

  • Fe

  • Ga

  • F


D.

F

Fluorine is the most electronegative element in the periodic table so it never shows positive oxidation state.


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332.

Which of the following element is a metalloid?

  • Bi

  • Sn

  • Ge

  • C


333.

What is the name of element with atomic number 105?

  • Kurchatovium

  • Dubnium

  • Nobelium

  • Holmium


334.

Which among the following elements have lowest value of IE1?

  • Pb

  • Sn

  • Si

  • C


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335.

KI and CusO4 solution when mixed, give :

  • CuI2 + K2SO4

  • Cu2I2 + K2SO4

  • K2SO4 + Cu2I2 + I2

  • K2SO4 + CuI2 + I2


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