TNPSC Exam-GROUP- IV - Subject wise analysed Previous Year questions and Answers-Science-Part-6

TNPSC Exam-GROUP- IV - Subject wise analysed Previous Year questions and Answers-Science-Part-6

                                   VAO EXAM - 2007

121.    The ultraviolet  rays from the sunlight cause

            A)        Skin Cancer              B)        Blood Cancer

C)        Lung Cancer             D)        Bone Cancer

Ans : (A)

121.    When a solid is directly converted into vapour it is called

            A)        Sublimation              B)        Solidification

C)        Vaporisation             D)        Evaporation

Ans : (A)

122.    Haemophilia, a human disease is caused the

            A)        Bacterial infection

B)        Fungal infection

C)        Mutant gene                        

D)        Viral infection

Ans : (C)

123.    Silkworm feeds on

            A)        Curry leaves            

           B)         Mango leaves

C)        Coriander leaves

D)        Mulberry leaves

Ans : (D)

124.    Sericulture is

            A)        Silkworm culture                 

B)        Fish culture

C)        Horticulture

D)        Agriculture

Ans : (A)

125.    The increase of egg production in the area of animal husbandry called

            A)        Blue revolution          B)        Silver revolution

C)        Gold revolution         D)        White revolution

Ans : (B)

126.    Bacteria that synthesise their food are called

            A)        Autotrophic bacteria                       

B)        Heterotrophic bacteria

C)        Parasitic Bacteria

D)        Saprophytes

Ans : (A)

127.    Gene is

            A)        an elementary unit of heredity

B)        a medicine to become young

C)        a smallest living thing

D)        a seed

Ans : (A)

128.    The powerhouse of the cell is

            A)        Mitochondria

B)        Golgi Complex

C)        Endoplasmic reticulum

D)        Chloroplast

Ans : (A)

129.    Which one of the following plant is an organ of respiration?

            A)        Flowers           B)        Leaf

C)        Root                 D)        None of these

Ans : (B)

130.    The top expanded umbrella shaped portion of a Mushroom is called

A)        Gills                            B)        Annulus

C)        Stipes                         D)        Pileus

Ans : (D)

131.    Example of a non-communicable disease is

A)        Cholera                                 

B)        Malaria

C)        Coronary Heart Disease

D)        AIDS

Ans : (C)

132.    Blood platelets help in

A)        immunity              B)        gaseous exchange

C)        blood clotting      D)        acid base balance

Ans : (C)

133.    Filariasis is help in

A)        Virus 

B)        Bacteria

C)        Wuchereria bancrofti         

D)        Plasmodium

Ans : (C)

134.    In mammals diaphragm is \

A)        Nervous system 

B)        Excretory system

C)        Digestive system                             

D)        Respiratory system

Ans : (D)

135.    Sound is measure in

A)        ampere                       B)        decibel

C)        light year                    D)        pascal

Ans : (B)

136.    The force between the two charges is directly proportional to

A)        r                                   B)        r^-1

C)        r²                                    D)        r^-2

Ans : (D)

137.    The power of a thin having a focal length 25 cm is

A)        4 D                              B)        0.04 D

C)        0.4 D                           D)        2.5. D

Ans : (A)

138.    When the pressure increases the boiling point of liquid

A)        decreases

            B)        increases

C)        first increases, then decreases

D)        first decreases, then increases

Ans : (C)

139.    In the following nuclear reaction the amount of energy Q released is

A (1.002 amu) + B (1.005 amu) ®

C (1.001 amu) + B(1.003 amu) + Q                    

A)        2.793 MeV                             B)        0.931 MeV

C)        0.310 MeV                              D)        1.862 MeV

Ans : (A)

140.    The time of fight t_¦ of a project is

            2u sinq                                     u² sin¹q

A)            g                              B)            2g

 u sinq                                         u² sin2q

C)            g                              D)          g

Ans : (A)

141.    The functional group of carboxylic acid is

A)        - COOH                      B)        - COOCH₃

C)        - OH                            D)        - CHO

Ans : (A)

142.    Clinker is the mixture of

A)   Calcium sulphate, calcium silicate, tricalcium aluminate 

B)   dicalcium silicate, tricalcium aluminate 

C)   dicalcium silicate, tricalcium silicate

D)  dicalcium silicate, tricalcium silicate and tricalcium aluminate

Ans : (D)

143.    Which one of the following acids is present in the sting of red ant?

A)        Lactic acid                

B)        Butyric acid

C)        Acetic acid                

D)        Formic acid

Ans : (D)

144.    40% formaldehyde is called

A)        Formica                      B)        Formalin

C)        Formic acid               D)        Aldehyde

Ans : (B)

145.    Who discovered neutrons?

A)        Rutherford                 B)        Goldstein

C)        Bohar - Bury              D)        Chadwick

Ans : (D)