Chemistry Helium gas is used in gas balloons instead of hydrogen gas because it is Non-combustible More abundant than hydrogen More stable Lighter than hydrogen Non-combustible More abundant than hydrogen More stable Lighter than hydrogen ANSWER DOWNLOAD EXAMIANS APP
Chemistry The most electropositive elements among the following is Ca Cs Na K Ca Cs Na K ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is a secondary pollutant ? SO2 NO PAN CO SO2 NO PAN CO ANSWER DOWNLOAD EXAMIANS APP
Chemistry Nitric acid does not react with Copper Iron Gold Zinc Copper Iron Gold Zinc ANSWER DOWNLOAD EXAMIANS APP
Chemistry The element used for making solar cells is Magnesium Sodium Calcium Silicon Magnesium Sodium Calcium Silicon ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which among the following is pure matter ? Carbon–dioxide Air Brass Iron Carbon–dioxide Air Brass Iron ANSWER DOWNLOAD EXAMIANS APP
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