Railway general science MCQ questions for RRB JE CBT

General Science MCQ for Indian Railways RRB JE CBT stage MCQ questions and Answers and PDF Available Download

free PDFs containing bunches  of MCQ and Online Practice Test  latest exam pattern based General Science Questions find Below

Download here PDF  Railway general science MCQ questions for RRB JE CBT

1.  An atom of an element with mass number 23 and atomic number 11 will have-
a
  11 protons, 12 neutrons and 11 electrons
b
 23 protons and 11 electrons
c
 11 neutrons, 12 protons and 11 electrons
d
 11 protons, 12 electrons and 11 neutrons
Answer & Explanation
Answer : Option A
2.  The most malleable metal is-
a
  Sodium
b
 Silver
c
 Gold
d
 Aluminium
Answer & Explanation
Answer : Option C
3.  In an atomic explosion enormous energy is released which is due to the-
a
  Conversion of mass into energy
b
 Conversions of neutrons into protons
c
 Conversion of mechanical energy into nuclear energy
d
 Conversion of chemical energy into nuclear energy
Answer & Explanation
Answer : Option A
4.  The hardest substance available in earth is-
a
  Silicon
b
 Platinum
c
 Gold
d
 Diamond
Answer & Explanation
Answer : Option D
5.  Deficiency of vitamin D causes-
a
  scurvy
b
 night blindness
c
 rickets
d
 beri-beri
Answer & Explanation
Answer : Option C
6.  Enzymes are absent in-
a
  algae
b
 fungi
c
 bacteria
d
 viruses
Answer & Explanation
Answer : Option D
7.  Which of the following is the best conductor of electricity ?
a
  Silver
b
 Copper
c
 Gold
d
 Zinc
Answer & Explanation
Answer : Option A
8.  Starch hydrolysing enzyme is-
a
  cellulase
b
 sucrose
c
 amylase
d
 invertase
Answer & Explanation
Answer : Option C
9.  Combustion is a process by which-
a
  light is produced
b
 heat is produced
c
 None of these
d
 heat and light both are produced
Answer & Explanation
Answer : Option D
10.  Which of the following metals forms an amalgum with other metals ?
a
  Zinc
b
 Mercury
c
 Tin
d
 Lead
Answer & Explanation
Answer : Option B
11.  A substance which changes readily into vapour without heating is called-
a
  Synthetic
b
 Volatile
c
 Efflorescent
d
 Effervescent
Answer & Explanation
Answer : Option B
12.  Balloons are filled with-
a
  Helium
b
 Argon
c
 Nitrogen
d
 Oxygen
Answer & Explanation
Answer : Option A
13.  Which of the following is used as lubricant ?
a
  Diamond
b
 Silica
c
 Graphite
d
 Iron Oxide
Answer & Explanation
Answer : Option C
14.  Which of the following gases is obtained by the reaction of water with Calcium Carbide ?
a
  Acetylene
b
 Ethylene
c
 Methane
d
 Water gas
Answer & Explanation
Answer : Option C
15.  The penetrating power is maximum in-
a
  g-rays
b
 cathode rays
c
 a-rays
d
 b-rays
Answer & Explanation
Answer : Option C
16.  Anaemia is caused in man due to the deficiency of-
a
  vitamin A
b
 none
c
 vitamin B12
d
 folic acid
Answer & Explanation
Answer : Option D
17.  In which of the following activities Silicon Carbide is used ?
a
  Cutting very hard substances
b
 Making cement and glass
c
 Making castes for statues
d
 Disinfecting water and ponds
Answer & Explanation
Answer : Option A
18.  Photosynthesis is-
a
  An endothermic process
b
 A neutral process
c
 An exothermic process
d
 A thermostatic process
Answer & Explanation
Answer : Option A
19.  The hydrogenation of the vegetables oils takes place in the presence of finely divided-
a
  nickel
b
 aluminium
c
 silica
d
 charcoal
Answer & Explanation
Answer : Option A
20.  The gas usually filled in electric bulb is-
a
  Nitrogen
b
 Carbon di-oxide
c
 Hydrogen
d
 Oxygen
Answer & Explanation
Answer : Option A
21.  Water gas is prepared by passing-
a
  Steam over heated sulphur
b
 Air over red hot coke
c
 Steam over white hot coke
d
 Methane over red hot coke
Answer & Explanation
Answer : Option C
22.  The process by which an organic compound breaks down into simpler compounds on heating to high temperature is known as-
a
  Pyrolysis
b
 Reduction
c
 Polymerisation
d
 Aromatisation
Answer & Explanation
Answer : Option A
23.  Sterility in some animals is caused due to deficiency of-
a
  vitamin D
b
 vitamin B12
c
 vitamin B
d
 vitamin E
Answer & Explanation
Answer : Option D
24.  Deep blue colour is imparted to glass by the presence of-
a
  Cobalt oxide
b
 Nickel oxide
c
 Iron oxide
d
 Cupric oxide
Answer & Explanation
Answer : Option A
25.  Optical fibres are mainly used in-
a
  Musical Instruments
b
 Communication
c
 Weaving
d
 Food Industry
Answer & Explanation
Answer : Option B
Share & Spread the love

Advertisement
500
Leave a comment...