Saturday 31 May 2014

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TNPSC Group I Exam-Previous Year Question Paper-Subject wise Analysed Questions-Science-Part 1

TNPSC Group I Exam-Previous Year Question Paper-Subject wise Analysed Questions-Science-Part 1

TNPSC Exam GROUP – I 2013
Science

1.    An alkaline earth metal M forms covalent compounds. It forms water soluble sulphate MSO4 and water insoluble hydroxide M(OH)2 which is amphoteric in nature. The metal M is

            A)        Calcium                     B)        Beryllium
            C)        Magnesium               D)        Strontium








Answer: (B)









2.         Consider the following statements:
            I.          Diamond is bad conductor of electricity
            II.         Graphite is used for making electrodes of electric furnaces
            III.        Solid carbon monoxide is known as dry ice.
            IV.       carbon dioxide turns moist red litmus slightly blush.

Which of the above statement is /are correct?
A)        I and III                       B)        II and III
            C)        I and II                        D)        III and IV








Answer: (C)








3.         Match List I with List II correctly and select your Answer using the codes given below:
                        List I (Ores)                           List II (Metals)
            A)        Hematite                                1.  Lead         
            B)        Cinnbar                                 2.  Iron
            C)        Calamine                               3.  Mercury
            D)        Galena                                   4.  Zinc

            Codes:
                        a          b          c          d
            A)        1          3          4          1
            B)        3          2          1          4
            C)        2          4          3          1
            D)        4          2          1          3








            Answer: (A)








4.         Differentiate Teratogen from Mutagen
  A)   Teratogen is a chemical that causes malformation in an embryo or  foetus while Mutagen causes change in genetic material of the adult
B)  Teratogen causes cancer while Mutagen causes mutation
C)  Teratogen causes heart failure while Mutagen is carcinogenic                    
D)  Teratogen causes abnormality in the adults while Mutagen affects infants








Answer: (A)








5.         Colums of Bertini in the kidneys of mammals are formed as extensions os
            A)        Medulla into cortex 
B)        Cortex into medulla
            C)        Medulla into pelvis
D)        Pelvis into ureter








Answer: (B)








6.         Which of the following is/are correctly matched?
            i.     Arteritics          -  Inflammation of artery
            ii.   Occlusion         -  Closure of blood vessel
            iii. Thrombectomy  -  Removal of blood clot from a blood vessel
           
            Of these :
            A)        All the three are correct                              
B)        Only (i) is correct
            C)        Only (ii) is correct                            
D)        only (iii) is correct








Answer: (A)








7.         Which of the following statements is not associated with biocommunication in animals?
 A)  They are sings through chemical molecules
B)  It is a mechanism of vocalization as seen between completing bird species
 C)   Associated with social conflict of organism between same species
D)    It is production of pheromones as between various species of insects








Answer: (C)








8.         Consider the following statements:
            Assertion (A)  :  On rainy day small oil film on water show brilliant colours.
            Reason    (R)  :   This is due to polarization of light
           
            Choose your correct answer:
 A)   Both (A) and (R) are individually true and (R) is the correct explanation of (A)
B)  Both (A) and (R) are individually true and (R) is not the correct explanation of (A)
C) (A) is true but (R) is false
D)  (A) is false but (R) is true








Answer: (C)







             
9.         A particle motion is given by distance - time curve as shown in the fiqure.
            The maximum instantaneous velocity of the particle is around the point.
 


                                             S
        Distance    P            R 
                            
                                     Q
                                               Time

             A)       P                                 B)        Q
            C)        R                                 D)        S








Answer: (C)








10.       Critically observe the reaction and choose the correct RQ from the options
            given below:
            C18 H34 O2 + 25.5O2       18CO2 + 17H2O
            The correct RQ of this reaction is
            A)        0.071                          B)        0.71
            C)        7.1                               D)        71








Answer: (B)



11.       The sampling rate, (how many samples per second are stored) for a CD is
            A)        48.4KHZ                    B)        22,050 HZ
            C)        44.1 KHZ                   D)        48 KHZ







           
            Answer: (C)








12.       What are the basic challenges in wireless computer systems?
            I.          Lower band width
            II.         Limited power
            III.        Dynamically changing network
            IV.       Low error rate

            Of these
            A)        I,III £ IV                       B)        I, IV, II
            C)        IV, II, I                         D)        I, II, III








Answer: (D)








13.       Which of the following statements is not correct?
  A)        An increase in oxidation number of an element implies that the element has undergone oxidation
B)  An increase in oxidation number of an element implies that it has undergone reduction
C)  The oxidation number of an element can be a fraction
D)  Oxidation number of an element is a positive or negative integer








Answer: (B)








14.       The third stage of the Indian Nuclear Power Programme is based on
            A)        Uranium                                                               
B)        Plutonium
C)        Thorium - Uranium 233 cycle
D)        None of these








Answer: (C)








15.       Which is the non fatal viral disease transmitted by Aedes mosquito?
            A)        Chikungunya             B)        Dengue Fever
C)        Filariasis                    D)        Malaria








Answer: (A)








16.       Consider the following statements and choose the correct answer from
            the options given below:
            A)        Succulence in halophytes is to store water to be used in future.
            B)        Succulence in hydrophytes is due to absorption of more water to 
neutralize the effect of increased entry of salts in the cells.
C)        Excess salts at times is deposited on the surface of leaves

A)        (a) and (c) are correct and (b) is wrong
B)        (b) is correct and (a) and (c) are wrong
C)        (c) is correct and (a) and (b) are wrong
D)        (a) is wrong and (b) and (c) are correct








Answer: (D)








17.       Choose the correct order of increase in the oxidation number of iodine
            in the following compounds.
            I2, HI, HIO4 and ICI
            A)        I2, HI, ICI, HIO4
            B)        HI, HIO4, ICI, I2
C)        HO, I2, ICI, HIO4
D)        HIO4, ICI, I2HI








Answer: (C)



18.       Identify:
            I.          I cannot be synthesized in the body
            II.         I am a PUFA
            III.        I am involved in phospholipid synthesis and breakdown of cholesterol
            IV.       I inhibit blood clotting and reduce the risk of heart attack.

            Who am I?
            A)        Non - essential fatty acid
            B)        Essential fatty acid
C)        Saturated fatty acid
D)        Poly unsaturated fatty acid








Answer: (B)








19.       Consider the following statements:
            I.          Glycolysis is a cellular respiration that occurs in the  mitochondria.
            II.         Glycolysis is breaking down of glucose into two molecules of a
                        compound called pyruvate

            A)        I alone is correct
            B)        II alone is correct
            C)        Both I and II are correct
            D)        Both I and II are wrong








Answer: (B)








20.       Gas lighters work on the basic principle of
            A)        piezo - electric effect
            B)        magnetic effect
            C)        thermo - electric effect
            D)        electromagnetic induction








Answer: (A)


21.       Match the following lists and select the correct answer:
                        List I                                       List II
            a)         Raman effect            1.  Magnetic field
            b)         Zeeman effect          2.  Scattering
            C)        Stark effect                3.  Relative velocity
            d)         Doppler effect           4.  Electric field

            Codes:
                        a          b          c          d
            A)        3          1          2          4
            B)        4          3          2          1
            C)        2          4          3          1
            D)        2          1          4          3








Answer: (D)








22.       Which of the following statements about hydrosere is true ?
 I.   The phytoplankton stage consists of free floating species   like Azolla, Lemna and Wolffia.
 II.   Forest stage is the climax community.
 III.   Second stage in succession is rooted floating stage.
 IV.Woodland stage is invaded by terrestrial plants.
           
            Of these:
            A)        I, II and IV
            B)        II and IV
            C)        IV only
            D)        I, III and IV








Answer: (B)








23.       Match the following:
               o      
            a)         C                                 1.  Triglyceride
               HO
           
b)         (Figure)                      2.  Unsaturated fatty acid
           
            c)         (Figure)                      3.  Saturated fatty acid

            d)         (Figure)                      4.  Phospholipid

            Codes :
                        a          b          c          d
            A)        2          3          1          4
            B)        1          4          2          3
            C)        3          4          1          2
            D)        4          2          1          3








Answer: (C)








24. What were the colours of contrasting characters of seed coat studied by Mendel among the garden peas?
            A)        Red and White
            B)        Yellow and Green
            C)        Grey and White
            D)        Pink and White








Answer: (C)








25.       Who was not participated in the discovery of Mendel’s experiments in 1900?
A)        Devries                      B)        Morgan
C)        Correns                      D)        Tschermark









Answer: (B)