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Q:

The substances that are composed of to or more different elements in fixed proportion by mass are called

A) mixture B) compound
C) element D) None of these
 
Answer & Explanation Answer: B) compound

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Filed Under: Chemistry

Q:

The law of constant proportions was enunciated by

A) Dalton B) Berthelot
C) Avogadro D) Proust
 
Answer & Explanation Answer: D) Proust

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Q:

Sodium carbonate crystal lose water molecules this property is called

A) hygroscopy B) deliquescence
C) efflorescence D) None of these
 
Answer & Explanation Answer: C) efflorescence

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Q:

Name the Scientist who stated that matter can be converted into energy

A) Boyle B) Lavoisier
C) Avogadro D) Einstein
 
Answer & Explanation Answer: D) Einstein

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Q:

When body is accelerated

A) its velocity never changes B) its speed always changes
C) its direction always changes D) its speed may or maynot change
 
Answer & Explanation Answer: D) its speed may or maynot change

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Q:

An object with a constant speed

A) is not accelerated B) might be accelerated
C) is always accelerated D) also has a constant velocity
 
Answer & Explanation Answer: B) might be accelerated

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Q:

Masses of stars and galaxies are usually expressed in terms of

A) neutron mass B) earth's mass
C) solar mass D) lunar mass
 
Answer & Explanation Answer: C) solar mass

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Q:

The minimum number of Non zero non collinear vectors required to produce a zero vector is

A) 3 B) 2
C) 4 D) 1
 
Answer & Explanation Answer: A) 3

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Filed Under: Physics