CONTENTS OF SCIENCE
Solved MCQs For PAKISTAN TESTING SERVICES PTS Related to Chemistry
>> Each day human body breathe in 15,000 to
20,000 liters of air.
>> The most abundant element in the universe is
>> The substance which increases the rate of
chemical reaction is Catalyst.
>> The average human body contains about 250
gram of Sodium Chloride.
>> pH is an abbreviation for Power of Hydrogen.
>> The best soil pH value for most crops and plants
>> Enzymes are biological catalysts.
>> The most abundant constituent in Air is
>> Isotopes are atoms of the same element with
different numbers of Neutrons.
>> Over 75% of the elements in the Periodic Table
>> Those substances which give hydroxyl ions in
water is called Base.
>> Those substances which give hydrogen ions in
water is called Acid.
>> KHSO4 is a Acid.
>> Neutral solution has pH value 7.
>> According to bronsted acid are Proton donor.
>> NH3 is Base.
>> Salts are Neutral.
>> Organic compounds are originated from Living
>> Alkanes are insoluble in water.
>> Poly Hydroxyl compounds of Aldehyde and
ketones are called Carbohydrates.
>> Wheat, rice and honey are the sources of
>> Polymers of amino acids are called Proteins.
>> Nucleic acids are of Two types.
>> Vitamin-C is also called ascrobic acid.
>> Fats and oils are example of Lipids.
>> The major component of troposphere is
>> Ozone depletion causes Skin Cancer.
>> The pH of the acid rains is less than 5.6.
>> Ozone is a Bluish gas.
>> In water, ratio of oxygen and hydrogen by mass
>> pH of the neutral solution is 7.
>> pH of the acidic solution is less than 7.
>> The branch of chemistry in which we study
hydrocarbon and their derivatives is called
>> The metal present in combine state is called
>> Which of the following is homogeneous mixture
>> Hydrogen has a positive charge Proton.
>> Electron in its ground state does not Radiate
>> Number of periods in modern periodic table is
>> Which of the following is transition element Cu.
>> Ink spreads in water because of Diffusion.
>> Lower the pH value Stronge will be an acid.
>> C 2 H2 is an organic compound.
>> C n H2n is the general formula of alkenes.
>> The Homologues has the same Chemical
>> Carbon atom usually Forms four covalent