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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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Filed Under: Chemistry

Q:

The most abundant metal in earth crust is

A) Iron B) magnesium
C) calcium D) aluminium
 
Answer & Explanation Answer: D) aluminium

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Q:

The credit for the discovery of transuranic element goes to

A) Hahn B) Rutherford
C) Seaborg D) Curie
 
Answer & Explanation Answer: C) Seaborg

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Q:

A pure substance can only be

A) Compound B) an element
C) an element or a compound D) a heterogeneous mixture
 
Answer & Explanation Answer: C) an element or a compound

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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:

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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Q:

Which of the following physical quantities do not have same dimensions

A) Force and Pressure B) Work and Energy
C) Impulse and momentum D) Weight and Force
 
Answer & Explanation Answer: A) Force and Pressure

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Filed Under: Physics