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Most Repeated MCQS in past papers of pts past papers,

 CONTENTS OF SCIENCE MCQS For Tests

Most Repeated MCQS in past papers of pts past papers,

>> Organic radical with general formula C n H2n+1

is Alkyl.

>> The next homologue of C 8 H18 is C 9 H20.

>> Methane is the first member of Methane is the

first member of Alkane Series.

>> The compound C 3 H8 must have All single

bonds.

>> The name of C 6 H14 is Hexane.

>> NaCN is inorganic.

>> Dehydration of ethyl alcohol with conc. H2 SO 4

results in the formation of Ethene.

>> AgNO3 reagents distinguished ethene from

acetylene.

>> Ethene decolorizes Br2 Water.

>> Ethene reacts with HBr, the compound formed

is CH 3 -CH 2 –Br.

>> All the member of alkane series has All single

bonds.

>> Baeyer’s reagent is Alkaline KMnO4.

>> Acetylene gives carboxylic acid with alkaline

KMnO4.

>> Ethyne gives a mixture of hydrocarbons on

halogenations.

>> Baeyer’s test shows the presence of double and

triple bond.

>> Ethane is the least reactive.

>> Ethane reacts with chlorine in the presence of

Sunlight.

>> Vitamin-K is a factor related to blood clotting.

>> The coldest region in atmosphere is

Mesopause.

>> The freezing point of water is 0 celcius.

>> The total volume of water present on earth

surface is 1.386 Billion KM cube.

>> The vital function of protoplasm is due to the

presence of Water.

>> The quantity of fresh water present on eat is

only about 2.5%.

>> The reason of unusual physical properties of

water is due to the presence of Hydrogen

bonding.

>> The density of water is one gram per centimeter

cube at 4°C.

>> The enormous quantity of water present on

earth surface acts as giant thermostat due to its

high Heat Capacity.

>> The latent heat of fusion of water is 6 KJ/Mol.

>> Dielectric constant of water at 18C o is 80.

>> Water gas is a mixture of CO & H2.

>> Chlorine act as a bleaching agent in the

presence of H2 O.

>> The chemical formula of magnetic oxide is

Fe3O4.

>> Rain water is acidic in nature because air

contain Carbon dioxide.

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>> Nutrient pollution of water bodies is caused by

Nitrates & Phosphates.

>> Most of the aquatic animals cannot survive

above 30°C.

>> Parkinson disease is caused by mercury.

>> The blister copper is refined by Electrolysis.

>> Chemical formula of Urea is NH2CONH2.

>> Sodium carbonate is commercially

manufactured by Solvay Process.

>> Urea is probably, most important fertilizer

Nitrogenous.

>> Petroleum is a mixture of many Hydrocarbons.

>> Raw materials used for manufacturing urea are

CO2 & NH3.

>> Roasting is a step of metallurgical process.

>> Different fractions of petroleum are separated

by Fractional Distillation.

>> The blister form of copper is Impure form.

>> Vitamin A is soluble in Fat.

>> Vitamin B is soluble in Water.

>> There are 4 types of DNA.

>> Nucleic acid was first discovered in 1869.

>> Mutation is a sudden chemical change in DNA.

>> Amino acids are the building blocks of Protein.

>> Organic chemistry is the study of Carbon and its

compounds.

>> Enzymes are made of Protein.

>> Cause of acidic rain is Sulphure Dioxide.

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UTS past papers of ASI (Assistant sub-inspector)

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