Chemistry Brass gets discoloured in air due to constant exposure in presence of: Hydrogen sulphide Hydrogenated wafers Aluminium sulphide Aluminium phosphide Hydrogen sulphide Hydrogenated wafers Aluminium sulphide Aluminium phosphide ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following nonmetals shows allotropy in the liquid state? Carbon Phosphorous Sulphur Bromine Carbon Phosphorous Sulphur Bromine ANSWER DOWNLOAD EXAMIANS APP
Chemistry Earth’s atmosphere is an envelope of gases extending to a height of 150 km 300 km 200 km 100 km 150 km 300 km 200 km 100 km ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one is the lightest element in the periodic table Helium Hydrogen Oxygen Carbon Helium Hydrogen Oxygen Carbon ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is a commercial source of energy? Sun Dried dung Natural gas Agricultural waste Sun Dried dung Natural gas Agricultural waste ANSWER DOWNLOAD EXAMIANS APP
Chemistry Suspension particles have the size between 10–2 – 10–4 cm 10–1 – 10–2 cm 10–8 – 10–10cm 10–5 – 10–7cm 10–2 – 10–4 cm 10–1 – 10–2 cm 10–8 – 10–10cm 10–5 – 10–7cm ANSWER DOWNLOAD EXAMIANS APP
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