Chemistry The first metal used by man was iron gold copper bronze iron gold copper bronze ANSWER DOWNLOAD EXAMIANS APP
Chemistry The alkaloid naturally found in coffee, cocoa and cola nut is Tannin Cocaine Caffeine Morphine Tannin Cocaine Caffeine Morphine ANSWER DOWNLOAD EXAMIANS APP
Chemistry An inert gas mixed with oxygen given to patients suffering from restricted breathing is Krypton Radon Helium Argon Krypton Radon Helium Argon ANSWER DOWNLOAD EXAMIANS APP
Chemistry Major portion of the earth’s crust is mainly constituted by Oxygen and Iron Silicon and Aluminium Oxygen and Silicon Silicon and Iron Oxygen and Iron Silicon and Aluminium Oxygen and Silicon Silicon and Iron ANSWER DOWNLOAD EXAMIANS APP
Chemistry Interveinal necrotic spots on leaves appear due to SO2injury NO2injury HF injury O3injury SO2injury NO2injury HF injury O3injury ANSWER DOWNLOAD EXAMIANS APP
Chemistry The smog is essentially caused by the presence of O2 and N2 O3 and N2 Oxides of N and S O2 and O3 O2 and N2 O3 and N2 Oxides of N and S O2 and O3 ANSWER DOWNLOAD EXAMIANS APP
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