Chemistry Which among the following metals provides amphoteric oxide ? Calcium Aluminium Silver Sodium Calcium Aluminium Silver Sodium ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is not a donor atom? Phosphorus Aluminium Antimony Arsenic Phosphorus Aluminium Antimony Arsenic ANSWER DOWNLOAD EXAMIANS APP
Chemistry Nitrogen forms a variety of compounds in all oxidation states ranging from –3 to + 5 –3 to + 4 –3 to + 3 –3 to + 6 –3 to + 5 –3 to + 4 –3 to + 3 –3 to + 6 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Man dies in the atmosphere of CO, because it Combines with the haemoglobin of blood, thereby making the later incapable of absorbing O2 Dries up the blood Reduces the organic matter of tissues Combines with O2 present in the body Combines with the haemoglobin of blood, thereby making the later incapable of absorbing O2 Dries up the blood Reduces the organic matter of tissues Combines with O2 present in the body ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following acids is used in battery ? Sulphuric acid Hydrofluoric acid Hydrochloric acid Sulphurous acid Sulphuric acid Hydrofluoric acid Hydrochloric acid Sulphurous acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry Glycol is added to aviation gasoline because it Prevents freezing of petrol Reduces consumption of petrol Reduces evaporation of petrol Increases efficiency of petrol Prevents freezing of petrol Reduces consumption of petrol Reduces evaporation of petrol Increases efficiency of petrol ANSWER DOWNLOAD EXAMIANS APP
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