TNPSC Exam-GROUP – II - Subject wise analysed questions and Answers- Science-Part 6

TNPSC Exam-GROUP – II - Subject wise analysed questions and Answers- Science-Part 6

126.    Diamond and graphite are

            A)        isomers                      B)        isotopes

            C)        allotropes                   D)        polymers

Ans : (C)

127.    Activated charcoal is used to remove colouring matter from impure substances.

            A)        oxidation

B)        reduction

            C)        adsorption

D)        bleaching

Ans : (C)

128.    Bordeaux mixture is a mixture of

            A)        copper sulphate and time                          

B)        bleaching powder and DDT

            C)        DDT and BHC

D)        DDT and Parathion

Ans : (A)

129.    By keeping the door of refrigerator in a room open, while working

            A)        the room gets cooled slightly

B)        the room gets more cooled

            C)        the room gets warmed up slightly

D)        the room gets neither warmer nor cooler

Ans : (D)

  

(May - 2007)

TNPSC GROUP - II

Science

130.    Sound travels at maximum speed in

            A)        Vacuum                                 B)        Water

            C)        Air                                           D)        Steel

            Ans : (D)

131.    A woman's voice is shriller than a man's voice due to

            A)        Higher frequency                

            B)        Higher amplitude

            C)        Lower frequency                             

            D)        Weak vocal chords

            Ans : (A)

132.    Which one of the following devices converts electrical energy into        mechanical energy?

            A)        Dynamo                                 B)        Transformer

            C)        Electric motor                        D)        Inductor

            Ans : (C)

133.    The process of nuclear fission occurs mainly in

            A)        nuclear reactor                                

            B)        Chemical reactions

            C)        the hydrogen bomb                                    

            D)        the sun

            Ans : (A)

134.    The process responsible for the enormous energy in the sun is

            A)        nuclear fission                    

            B)        nuclear fusion

            C)        the burning of gases

            D)        as yet unknown

            Ans : (B)

135.    Which one of the following is correctly matched?

            A)        Vitamin A                   -           Anaemia

            B)        Glucose                     -           Eyesight

            C)        Iodine                         -           Goitre                                    

            D)        Cyanocobalamin     -           Diabetes

            Ans : (C)

136.    Which one of the following is neither an element nor a compound?

            A)        Silver                                      B)        Water

            C)        Air                                           D)        Sucrose

            Ans : (C)

137.    Consider the following statements:

Assertion (A) :  Electric cookers are coated with magnesium oxide.

 Reason (R)    :  It protects them against fire.

            Now select your answer according to the coding scheme given below :

            A)        Both (A) and (R) are true and (R) is the correct explanation of (A)

            B)        Both (A) and (R) are true, but (R) is not the correct explanation of (A)

            C)        (A) is true, but (R) is false                                      

            D)        (A) is false, but (R) is true

            Ans : (A)

138.    The element(s) which exist is liquid state at room temperature is (are)

            I)          Sodium                                 II)         Bromine

            III)        Mercury                                 IV)       Magnesium

             

Of these:

            A)        I alone is correct

            B)        I and II are correct

            C)        II and III are correct

            D)        All are correct

            Ans : (C)

139.    Which of the following is the correct order of calorific values of fuel?

            A)        Hydrogen > Petrol > Wood            

            B)        Wood > Hydrogen > Petrol

            C)        Petrol > Wood > Hydrogen

            D)        Wood > Petrol > Hydrogen

            Ans : (A)

140.    Insectivorous plants capture insects for obtaining

            A)        Calcium                                 B)        Nitrogen

            C)        Carbon                                   D)        Cobalt

            Ans : (B)

141.    Protein essential for chromatin formation is

            A)        Actin                                       B)        Tubulin

            C)        Histone                                  D)        Myosin

            Ans : (C)

142.    The treatment of milk to eliminate pathogenic bacteria is known as

            A)        Isolation                                 B)        Sterilization

            C)        Pasteurization                      D)        Fermentation

            Ans : (C)

143.    The five kingdom concept was proposed by

            A)        Linnaeus                               B)        Whittaker

            C)        Theophrastus                       D)        John Ray

            Ans : (B)

144.    The nucleolus is rich in

            A)        DNA and proteins                           

            B)        DNA and lipids

            C)        RNA and lipids

            D)        RNA and proteins

            Ans : (D)

145.    " One gene - one enzyme hypothesis" was coined by

            A)        Henry Osborn                      

            B)        Beadle and Tatum

            C)        Jacob and Monod                           

            D)        Best and Tailor

            Ans : (B)

146.    Diphtheria disease is connected with

            A)        Lungs                                     B)        Liver

            C)        Throat                                     D)        Blood

            Ans : (C)

147.    INSAT II - B was successfully launched in

            A)        July, 1993                              B)        April, 1975

            C)        June, 1979                            D)        November, 1981

            Ans : (A)

 

(Original Question paper - 2003)

TNPSC GROUP - II

Science

148.    Grass looks green because

            A)        it absorbs all colours in the spectrum except green                             

            B)        it absorbs only green colour from the spectrum

            C)        the eye absorbs only green colour from grass

            D)        None of these

            Ans : (A)

149.    A girl is swinging on a swing in a sitting position. If she stands up and swings then the period of oscillation

            A)        will be not be affected                                

            B)        will increase

            C)        will decrease

            D)        will become zero

            Ans : (B)

150.    A hot body will radiate heat most rapidly if its surface is

            A)        white and polished                         

            B)        white and rough

            C)        black and polished

            D)        black and rough

            Ans : (D)