Chemistry Helium gas is used in gas balloons instead of hydrogen gas because it is Non-combustible More stable Lighter than hydrogen More abundant than hydrogen Non-combustible More stable Lighter than hydrogen More abundant than hydrogen ANSWER DOWNLOAD EXAMIANS APP
Chemistry If there is one million Mg2+ ions in MgCl2, how many chloride ions are there? Ten million Half a million Two million One million Ten million Half a million Two million One million ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following statements is not correct? Vulcanisation of rubber makes it Chemical resistant Withstand higher temperatures Strong and hard Soft and flexible Chemical resistant Withstand higher temperatures Strong and hard Soft and flexible ANSWER DOWNLOAD EXAMIANS APP
Chemistry Diamond is lustrous because It is colourless It is pure It is hard Its refractive index is high It is colourless It is pure It is hard Its refractive index is high ANSWER DOWNLOAD EXAMIANS APP
Chemistry Stalactites and Stalagmites form due to the precipitation of : CaCl2 MgCO3 MgCl2 CaCO3 CaCl2 MgCO3 MgCl2 CaCO3 ANSWER DOWNLOAD EXAMIANS APP
Chemistry What is the product formed when sodium bicarbonate is heated strongly? Sodium Peroxide Sodium Carbonate Sodium Monoxide Sodium Hydroxide Sodium Peroxide Sodium Carbonate Sodium Monoxide Sodium Hydroxide ANSWER DOWNLOAD EXAMIANS APP
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