Chemistry Which of the following chemicals is responsible for depletion of ozone layer in the atmosphere? Chlorofluorocarbons Carbon dioxide Sulphur dioxide Nitrous oxide Chlorofluorocarbons Carbon dioxide Sulphur dioxide Nitrous oxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry The compounds formed when hydrogen combines with p-block elements are called Ionic hydrides Metallic hydrides Polynuclear hydrides Molecular hydrides Ionic hydrides Metallic hydrides Polynuclear hydrides Molecular hydrides ANSWER DOWNLOAD EXAMIANS APP
Chemistry The element with highest first ionisation energy is Helium Hydrogen Sodium Lithium Helium Hydrogen Sodium Lithium ANSWER DOWNLOAD EXAMIANS APP
Chemistry The hardest form of carbon is coke graphite diamond charcoal coke graphite diamond charcoal ANSWER DOWNLOAD EXAMIANS APP
Chemistry Aquaregia is a mixture of the following in the ratio 1 : 3 by volume Conc. HNO3 and conc. HCl Conc. HNO3 and conc. H2SO4 Conc. HCl and conc. HNO3 Dil. HCl and dil. HNO3 Conc. HNO3 and conc. HCl Conc. HNO3 and conc. H2SO4 Conc. HCl and conc. HNO3 Dil. HCl and dil. HNO3 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Sour taste of lemon is due to the presence of which of the following ? Acetic acid Citric acid Formic acid Oxalic acid Acetic acid Citric acid Formic acid Oxalic acid ANSWER DOWNLOAD EXAMIANS APP
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