RRB SOLVED PAPERS:

SCIENCE:

1.      Who invented Radar?

A.    Henrey Backquerel

B.     Max Planck

C.     Robert Watson Watt

D.    Humphrey Davy

Ans : C

2.      What does happens when water is condensed into ice ?

A.    Heat is absorbed

B.     B) Heat is released

C.     (C) Quantity of heat remains unchanged

D.    (D) None of these

Ans : (A)

3.      Which of the following gases is not a noble gas ?

A.    Zenon

B.     Argon

C.     Helium

D.    Chlorine

Ans : (D)

4.      Which of the following diffuses most quickly ?

A.    Solid

B.     Gas

C.     Liquid

D.    None of these

Ans : (B)

5.      Which temperature in Celsius scale is equal to 300 K ?

A.    30°C

B.     27°C

C.     300°C

D.    None of these

Ans : (B)

6.      Light-year measures which of the following ?

A.    Intensity of light

B.     Mass

C.     Time

D.    Distance

E.     Ans : (D)

7.      Which of the following gases is used for ripening the fruits ?

A.    Methane

B.     Ethane

C.     Ethylene

D.    Acetylene

E.     Ans : (C)

8.      Besides hydrogen, which of the following elements is common in organic compounds ?

A.    Phosphorus

B.     Sulphur

C.     Nitrogen

D.    Carbon

E.     Ans : (D)

9.      Solid Carbon dioxide is termed as—

A.    Soft ice

B.     Dry ice

C.     White ice

D.    None of these

E.     Ans : (B)

10.  1 kg of a liquid is converted into its vapour at its boiling point. The heat absorbed in the process is called—

A.    Latent heat of vaporisation

B.     Latent heat of fusion

C.     Latent heat of sublimation

D.    None of these

E.     Ans : (A)

11.  The metal extracted from Bauxite is—

A.    Silver

B.     Copper

C.     Manganese

D.    Aluminium

E.     Ans : (D)

12.  How much water is contained in our body by mass ?

A.    65%

B.     70%

C.     60%

D.    None of these

E.     Ans : (B)

13.  What determines the sex of a child ?

A.    Chromosomes of the father

B.     Chromosomes of the mother

C.     RH factor of the parents

D.    Blood group of the father

E.     Ans : (A)

14.  The wire of flash bulb is made of—

A.    Copper

B.     Barium

C.     Magnesium

D.    Silver

E.     Ans : (C)

15.  When sun-light passes through a glass prism, which of the following colours refracts the most ?

A.    Blue

B.     Red

C.     Orange

D.    Green

E.     Ans : (A)

16.  What is ginger ?

A.    Flower

B.     Root

C.     Stem

D.    Leaf

E.     Ans : (B)

17.  Which of the following pairs is incorrectly matched ?
A.  Encephalitis – Brain
B.  Colitis – Colon
C.  Hepatitis – Liver
D.  Jaundice – Throat
Ans: D

18.  Which of the following type of clothes is manufactured by using petroleum products ?
A.  Rayan Silk
B.  Terelyne
C.  Nylon
D.  Cotton
Ans: C

19.  The function of haemoglobin in the body is
A.  Transport of oxygen
B.  Destruction of bacteria
C.  Prevention of anemia
D.  Utilization of iron
Ans: A

20.  Which disease is more common among agricultural workers as compared to urban population ?
A.  Lung’s disease
B.  Cirrhosis of liver
C.  Hookworm infection
D.  Cancer
Ans: C

21.  Biological fixation of nitrogen occurs most commonly in which of the following crops ?
A.  Pulses
B.  Rice
C.  Wheat
D.  None of these
Ans: D

22.  Which one of the following grows under the tree ?
A.  Cabbage
B.  Bengal gram
C.  Peanuts
D.  Castor
Ans: C

23.  Which of the following is an example of a plant that bears seeds but not fruits ?
A.  Cotton Plant
B.  Peepal tree
C.  Eucalyptus tree
D.  Pine tree
Ans: C

24.  Radioactive element which has been found to have large reserves in India is
A.  Uranium
B.  Thorium
C.  Radium
D.  Plutonium
Ans: B

25.  The image formed on the retina of a human eye is
A.  Real and upright
B.  Real and inverted
C.  Imaginary and upright
D.  Imaginary and inverted
Ans: B

26.  In increasing sequence, the major elements present in the human body are
A.  Calcium, iron, sodium, phosphorus
B.  Calcium, phosphorus, potassium, sulphur
C.  Calcium, iron, sodium, sulphur
D.  Calcium, potassium, phosphorus, iron
Ans: A

27.  A light sensitive compound used in photography is
A.  Silver chloride
B.  Silver sulphide
C.  Silver bromide
D.  Silver oxide
Ans: C

28.  Protective foods in our diet are
A.  Fats and vitamins
B.  Carbohydrates and minerals
C.  Vitamins and minerals
D.  Proteins and carbohydrates
Ans: D

29.  The black hole theory was discovered by
A.  S. Chandrasekhar
B.  Har Gobind Khorana
C.  C.V. Raman
D.  S. Ramanujan
Ans: A