Correct Answer : Surface Tension of water
Due to Surface Tension of water, the surface acts as a film over which small insects can move without sinking.
Correct Answer : Nicotine
The leaves of Nicotiana tabacum (tobacco) contain the toxic alkaloid, nicotine as a major constituent and several other pyridine alkaloids as minor constituents.
Correct Answer : Potassium dichromate crystals
The Breathalyzer is the oldest breath alcohol analyzer; it is based on the principle of color change of potassium dichromate solution in the presence of alcohol and then analysis using spectroscopy after a specified time to ensure complete reaction.
Correct Answer : Nitrogen
Potato chip bags are not full of air, but of nitrogen gas. This is done to prevent the chips from oxidizing, which is part of what makes them go stale.
Correct Answer : Oxygen
The most abundant elements by mass in the body of a healthy human adult are Oxygen (61.4 %), Carbon (22.9 %), Hydrogen (10.0 %) and Nitrogen (2.6 %).
Correct Answer : Burning coal in air
Correct Answer : Soil pollution
Correct Answer : Nuclear fusion
The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom. During the fusion process, radiant energy is released.
Correct Answer : Linseed oil
Linseed oil is generally used in the manufacture of oil paints, drying oil finish or varnish in wood finishing, as a pigment binder in oil paints, as a plasticizer and in the manufacture of linoleum.
Correct Answer : Carbolic Acid
Phenol is highly acidic in nature and hence it is also known as carbolic acid.
