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Q:

All isotopes of the same element have ____________

A) different atomic numbers and different atomic mass B) different atomic numbers and the same atomic mass
C) the same atomic number but different atomic masses D) the same atomic number and the atomic mass
 
Answer & Explanation Answer: C) the same atomic number but different atomic masses

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Filed Under: Chemistry

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Q:

Which of the following causes damage to bridges, iron railings and all objects made of metals?

A) Reduction B) Rancidity
C) Acidity D) Corrosion
 
Answer & Explanation Answer: D) Corrosion

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Filed Under: Chemistry
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Q:

What charge is present on a neutron?

A) positive B) negative  
C) no charge D) No option is correct
 
Answer & Explanation Answer: C) no charge

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Q:

Atomic mass of Carbon is 12 and that of Helium is 4. State which of the following statements is true for 1 mole of each of the elments?

A) 1 mole of Helium will contain 3 times more atoms than 1 mole of Carbon B) 1 mole of Carbon will contain the same number of atoms as present in 1 mole of Helium
C) 1 mole of Carbon will contain one-third the number of atoms present in 1 mole of Helium D) 1 mole of Carbon will contain 3 times more atoms than 1 mole of Helium
 
Answer & Explanation Answer: B) 1 mole of Carbon will contain the same number of atoms as present in 1 mole of Helium

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Q:

The SI unit of weight is a

A) Kg B) Newton
C) Gram D) Dyne
 
Answer & Explanation Answer: B) Newton

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Filed Under: Physics
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Q:

Velocity of a car does not depend on

A) Speedometer B) Change in direction
C) Change in speed D) Change in acceleration
 
Answer & Explanation Answer: A) Speedometer

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Q:

The rate of change of velocity is called

A) Momentum B) Speed
C) Acceleration D) Force
 
Answer & Explanation Answer: C) Acceleration

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Q:

A sentence has been given in Active/Passive Voice. Out of the four given alternatives, select the one which best expresses the same sentence in Passive/Active Voice.

 

The Chinese company manufactured those robots.

 

A) Those robots were manufactured by the Chinese company.   B) Those robots was manufacture by the Chinese company.
C) These robots were manufactured by the Chinese company. D) The robots was manufactured by the Chinese company.,
 
Answer & Explanation Answer: A) Those robots were manufactured by the Chinese company.  

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