Chemistry Which of the following is not a precious/semi-precious stone? Ruby Pearl Sapphire Emerald Ruby Pearl Sapphire Emerald ANSWER DOWNLOAD EXAMIANS APP
Chemistry The element with highest first ionisation energy is Lithium Hydrogen Helium Sodium Lithium Hydrogen Helium Sodium ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is secondary air pollutant ? Dust particles SO2 Photochemical smog NO2 Dust particles SO2 Photochemical smog NO2 ANSWER DOWNLOAD EXAMIANS APP
Chemistry The gas used in the manufacture of vanaspati from vegetable oil is carbon dioxide hydrogen nitrogen oxygen carbon dioxide hydrogen nitrogen oxygen ANSWER DOWNLOAD EXAMIANS APP
Chemistry The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle? 100 years 13 days 3 billion years 0.01 minute 100 years 13 days 3 billion years 0.01 minute ANSWER DOWNLOAD EXAMIANS APP
Chemistry The mass number of a nucleus is always less than its atomic number a fraction always more than the atomic weight the sum of the number of protons and neutrons present in the nucleus always less than its atomic number a fraction always more than the atomic weight the sum of the number of protons and neutrons present in the nucleus ANSWER DOWNLOAD EXAMIANS APP
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