Physical Science

Correct Answer: C

Main and excessive part of plasma consists of Water. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: C

Main use of salt in diet is to: produce small amount of hydrochloric acid required for digestion. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: B

Melanoma (skin cancer) is associated with ozone depletion. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: A

Metal are highly Electropositive. Its composition and chemical or physical behavior give it the stated classification or property.

Correct Answer: A

Milk tastes sour when kept in the open for sometime due to the formation of lactic acid. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: B

Muscle fatigue is caused by the accumulation of Lactic acid. The named agent or condition produces the characteristic biological changes associated with the disease.

Correct Answer: A

Nail polish remover contains Acetone. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: D

Nuclear radiation is emitted by those elements whose: nuclei are unstable. Its composition and chemical or physical behavior give it the stated classification or property.

Correct Answer: D

Oil of vitriol is Sulfuric acid. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: B

Oxidation is a chemical reaction involving the Loss of Electrons. Its composition and chemical or physical behavior give it the stated classification or property.

Correct Answer: A

Permanent hardness of water due to sulphate of metals can be destroyed by the use of Zeolites. Its composition and chemical or physical behavior give it the stated classification or property.

Correct Answer: B

Phosphorus is an essential component of one of the following biological molecules: Nucleic acids. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: B

Pure limestone is called Calcium Carbonate. The term is defined by the subject, process, or characteristic described in the question.

Correct Answer: B

Rancidity produced in butter can be decreased by adding quinoline to the butter”. This statements shows that Quinoline is an inhibitor. This statements shows that Quinoline is an inhibitor. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: D

Ruby is an oxide of aluminium oxide. Its composition and chemical or physical behavior give it the stated classification or property.

Correct Answer: B

Second ionization energy: is always greater than first ionization energy. The stated result follows from the relevant physical relationship between force, matter, motion, or energy.

Correct Answer: C

Soil acidity is corrected by: Liming. Its composition and chemical or physical behavior give it the stated classification or property.

Correct Answer: B

Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally metallic substances. These substances are generallymetallic substances. The effect results from the movement of charge or the interaction of electric and magnetic fields.

Correct Answer: D

Substance used in match sticks: Phosphorus. This description follows from the defining characteristics and established facts associated with the subject.

Correct Answer: C

Terrestrial planets in solar system are made of Both an and B. Astronomical observations and measurements establish this relationship among the relevant celestial bodies.