Which one of the following materials is not present in gun powder?
[amp_mcq option1=”Sulphur” option2=”Charcoal” option3=”Potassium nitrate” option4=”Barium sulphate” correct=”option4″]
This question was previously asked in
UPSC CISF-AC-EXE – 2017
Which one of the following materials is not present in gun powder?
[amp_mcq option1=”Sulphur” option2=”Charcoal” option3=”Potassium nitrate” option4=”Barium sulphate” correct=”option4″]