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Q:

The fundamental particles present in equal numbers in neutral atoms are

A) protons and electrons B) neutrons and electrons
C) protons and neutrons D) protons and positrons
 
Answer & Explanation Answer: A) protons and electrons

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Filed Under: Chemistry

Q:

The discovery of neutron became very late because

A) it is present in nucleus B) it is a fundamental particle
C) it does not move D) it does not carry any charge
 
Answer & Explanation Answer: D) it does not carry any charge

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Q:

Cathode rays have

A) mass only B) charge only
C) no mass and no charge D) mass and charge both
 
Answer & Explanation Answer: D) mass and charge both

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Q:

Cathode rays are 

A) electromagnetic wave B) stream of alpha particle
C) stream of electrons D) radiations
 
Answer & Explanation Answer: C) stream of electrons

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Q:

Who is the father of modern chemistry?

A) Priestley B) Lavoisier
C) Dalton D) Mendeleeff
 
Answer & Explanation Answer: B) Lavoisier

Explanation:

Antoine-Laurent de Lavoisier, a french chemist is considered as the "Father of Modern Chemistry."

who_is_the_father_of_modern_chemistry1538547478.jpg image

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Q:

SI unit of temperature is

A) Kelvin B) Celsius
C) Fahrenheit D) Joule
 
Answer & Explanation Answer: A) Kelvin

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Filed Under: Physics

Q:

Heat is associated with

A) K.E of random motion of molecules B) K.E of orderly motion of molecules
C) Total K.E of random and orderly motion of molecules D) None of these
 
Answer & Explanation Answer: A) K.E of random motion of molecules

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Q:

Heat energy of an object is

A) the average energy of the molecules of the object B) the total energy of the molecules of the object
C) the average velocity of the molecules of the object D) the average potential energy of the molecules of the object
 
Answer & Explanation Answer: B) the total energy of the molecules of the object

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Filed Under: Physics