39000+ Important MCQs for BANK PO

1) In cold countries alcohol is preferred to mercury as a thermometric liquid because

2) O2 released in the process of photosynthesis comes from

3) The two isotopes of uranium, 235U and 238U have
1. equal number of protons
2. equal number of neutrons
3. 92 protons each 
Which of the above statements is/are correct?

4) By what process is heat transmitted from the filament of an evacuated electric bulb to the glass?

5) Heavy water
1. contains more dissolved air
2. contains dissolved minerals and salts
3. has deuterium in place of hydrogen
4. is used in nuclear reactors 
The correct statements are:

6) A body weighs slightly more at the poles than at the equator because

7) Some scientist and discovery pairs are given below:
1.Bohr-Model of hydrogen atom
2.Einstein-Photoelectric effect
3.Chadwick-Neutron
4.De Broglie-Matter waves Which of the above pairs are correctly matched?

8) Television viewers using dish antenna to receive satellite (DTH) signals do not receive signals during rain because:
 (1) Their antennas are small 
(2) Rain droplets absorb the energy of radio waves 
(3) Rain droplets disperse the energy of radio waves from their original direction. 
Which of the above statement/statements is /are correct?

9) A colour-blind man marries a normal woman whose father was colour-blind. They have 3 children, two daughters and ason. What are the chances of their children being colour-blind?

10) When the speed of a body is doubled, its kinetic energy becomes