Which one of the following is most sensitive to environmental change? 1) Amphibian 2) Reptile 3) Mammal 4) Insect

Which one of the following is the largest source of electricity in India? 1) Hydropower plants 2) Nuclear power plants 3) Thermal power plants 4) Wind energy

The HIV virus weakens the immunity of a person because it destroys : 1) mast cells 2) platelets 3) erythrocytes 4) lymphocytes

Which one of the following air pollutants combines with the hemoglobin of human blood and reduces its oxygen-carrying capacity, leading to suffocation and may cause even death? 1) Chlorofluorocarbon 2) Fly ash ...

In paper manufacturing, degumming of the raw material is done using : 1) sulphuric acid 2) bleaching powder 3) caustic soda 4) nitric acid

Which one of the following is not an allotrope of carbon? 1) Coal 2) Diamond 3) Graphite 4) Graphene

Dolomite powder is applied in some agricultural lands. The purpose of applying it is to : 1) increase the pH of the soil 2) lower the pH of the soil 3) ...

Deficiency of fluoride leads to which one of the following health problems? 1) Tooth caries 2) Mottling of tooth 3) Bending of bones 4) Stiffening of joints

Excessive use of which of the following fertilizers may be responsible for the presence of a toxic substance in groundwater? 1) Nitrogen 2) Phosphate only 3) Potassium only 4) Phosphate ...

Which one of the following elements does not form solid hydrogen carbonate? 1) Sodium 2) Potassium 3) Caesium 4) Lithium