TNPSC Exam-GROUP – II - Subject wise analysed questions and Answers- Science-Part-5

TNPSC Exam-GROUP – II - Subject wise analysed questions and Answers- Science-Part-5

101.    When common salt is mixed with ice, the melting point

            A)        is lowed        

            B)        is raised

            C)        remains the same

            D)        is first lowered and then raised

Ans : (A)

102.    DNA is made up of

            A)        Sugar                         B)        ribose

            C)        amino acid                D)        nucleotides

Ans : (D)

103.    Rusting of iron is ………….. process.

            A)        oxidation                   

            B)        reduction

            C)        neither oxidation nor reduction

            D)        both oxidation and reduction

Ans : (A)

104.    Match List – I with List – II correctly and select your answer using the codes given below

                                    List – I                                    List - II

            a)         Ammonium sulphate           1)         Fertilizer

b)         Chloroform                            2)         Reducing Agent

            c)         Carbon                                   3)         Anaesthesia

d)         Hydrogen peroxide              4)         Bleaching Agent

Codes:

            a          b          c          d

A)        1          3          2          4

B)        1          2          3          4

C)        2          3          4          1

D)        3          2          1          4

Ans : (A)

105.    Consider the following statements:

            Assertion (A) :           Drinking soda is mildly acidic is nature

            Reason (R)   :           It contains carbon dioxide

           

            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 : (D)

106.    Enriched Uranium is

            A)        Uranium U-238

            B)        Uranium U – 235

            C)        Uranium mixed with Thorium

            D)        Uranium mixed with Plutonium

Ans : (B)

107.    Which one is a fast growing tree?

            A)        Banyan                                  B)        Teak

            C)        Coconut                                 D)        Eucalyptus

Ans : (D)

108.    Which one of the following represents the family planning surgery?

           

           A)       Vasectomy                              B)        Ovariectomy

            C)        Testisectomy                         D)        Hysterectomy

Ans : (A)

TNPSC GROUP – II  2007 (Nov)

Science

109.    A rough Endoplasmic Reticulum specially developed in cell engages in

            A)        nucleotide synthesis                                  

B)        protein in synthesis

            C)        lipied synthesis

D)        starch synthesis

Ans : (B)

110.    Krebs cycle takes place in

            A)        Chloroplast

B)        Peroxisomes

            C)        Mitochondria

D)        Cytoplasm

Ans : (C)

111.    Lysosome is also known as

            A)        Suicidal bags                                   

B)        Powerhouse of the cell

            C)        Chondriosome

D)        Dictyosome

Ans : (A)

                                                                                                           

112.    The sex cells are produced by the process of

            A)        mitosis                        B)        meiosis

            C)        amitosis                     D)        None of these

Ans : (B)

113.    Crossing over takes place in which of the following stages?

            A)        Leptotene     

B)        Zygotene

            C)        Pachytene

D)        Diakinesis

Ans : (C)

114.    In animals the adaptation for underground life is called

            A)        Terrestrial adaptation

B)        Fossorial adaptation

            C)        Aquatic adaptation

D)        Volant adaptation

Ans : (B)

115.    Decibel is a unit to measure the

            A)        intensity of sound               

B)        intensity of radiation

            C)        Intensity of light

D)        intensity of heat

Ans : (A)

116.    Blood sugar levels is increased by

            A)        FSH                            B)        TSH

            C)        Insulin                         D)        Glucagon

Ans : (D)

117.    Acromegaly is caused due to

            A)        hyper –secretion of somatotrophic hormone

B)        hypo-secretion of somatotrophic hormone

            C)        hyper – secretion of insulin

D)        hypo – secretion of glucagon

Ans : (A)

118.    Regressed corpus luteum is called

            A)        Corpus lentia                                   

B)        Corpus allata

            C)        Corpus degeneratum

D)        Corpus albicans

Ans : (D)

119.    Write the expansion of LCD

            A)        Liquid Crystal Display                                

B)        Light Controlled Decoder

            C)        Lack of Control of Digits

D)        None of these

Ans : (A)

120.    Which of the following would be the most suitable for making an electromagnet?

            A)        Copper                       B)        Tungsten

            C)        Soft iron                     D)        Steel

Ans : (C)

121.    An electric bulb has a filament made of

            A)        Copper                                   B)        Iron

            C)        lead                                        D)        Tungsten

Ans : (D)

122.    The nucleus of an atom contains

            A)        Protons and neutrons        

B)        Protons and electrons

            C)        neutrons and electrons

D)        neutrons only

Ans : (A)

123.    Which of the following falls down faster in vacuum ?

            A)        Wooden ball

B)        Feather

            C)        Steel ball

D)        Al l will fall down at the same speed because of no air resistance in vacuum

Ans : (D)

124.    The most acidic compound of the following is

            A)        methane

B)        methyl alcohol

            C)        ethyl alcohol

D)        phenol

Ans : (D)

125.    Consider the following statements :

            Assertion (A) : Bakelite is a thermosetting plastic

            Reason (R)    :  Thermosetting plastics are those which change irreversibly into 

                                      hard and rigid materials on heating.

            Of these statements :

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

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

C)  (A) is true, but (R) is true 

D)  (A) is false, but (R) is true

Ans : (A)