Chemistry Copper substances when exposed to air gains a green coating due to the formation of: Cu(NO3)2 CuCO3 Cu(OH)2 CuO CuSO4 Cu(NO3)2 CuCO3 Cu(OH)2 CuO CuSO4 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is not a precious/semi-precious stone? Sapphire Ruby Emerald Pearl Sapphire Ruby Emerald Pearl ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following could be used as fuel in propellant or rockets ? Liquid Hydrogen + Liquid Oxygen Liquid Oxygen + Liquid Argon Liquid Hydrogen + Liquid Nitrogen Liquid Nitrogen + Liquid Oxygen Liquid Hydrogen + Liquid Oxygen Liquid Oxygen + Liquid Argon Liquid Hydrogen + Liquid Nitrogen Liquid Nitrogen + Liquid Oxygen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Who is known as the 'father of modern chemistry' Robert Boyle John Dalton Democritus Antoine Lavoisier Robert Boyle John Dalton Democritus Antoine Lavoisier ANSWER DOWNLOAD EXAMIANS APP
Chemistry The nucleus of an atom consists of protons and neutrons All of these electrons and neutrons electrons and protons protons and neutrons All of these electrons and neutrons electrons and protons ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following metals has least melting point ? Gold Copper Silver Mercury Gold Copper Silver Mercury ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS