Chemistry The elements with atomic numbers 9, 17, 35, 53, 85 are all Light metals Halogens Heavy metals Noble gases Light metals Halogens Heavy metals Noble gases ANSWER DOWNLOAD EXAMIANS APP
Chemistry Helium gas is used in gas balloons instead of hydrogen gas because it is More stable More abundant than hydrogen Non-combustible Lighter than hydrogen More stable More abundant than hydrogen Non-combustible Lighter than hydrogen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is not a chemical reaction'? Burning of coal Conversion of water into steam Digestion of food Burning of paper Burning of coal Conversion of water into steam Digestion of food Burning of paper ANSWER DOWNLOAD EXAMIANS APP
Chemistry The most abundant inert gas in the atmosphere is Helium Neon Argon Krypton Helium Neon Argon Krypton ANSWER DOWNLOAD EXAMIANS APP
Chemistry DDT and BHC may act as Allergens Asthematic agents Carcinogens None of these Allergens Asthematic agents Carcinogens None of these ANSWER DOWNLOAD EXAMIANS APP
Chemistry When there are two electrons in the same orbital, they have: Opposite spin No spin Same or opposite spin Same spin Opposite spin No spin Same or opposite spin Same spin ANSWER DOWNLOAD EXAMIANS APP
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