Matter and its Nature NEET Questions

Physical Chemistry - Some Basic Concepts of Chemistry

Matter and its Nature MCQ Questions


13.
The SI unit of temperature is defined in terms of which constant?
A.
Speed of light
B.
Planck's constant
C.
Avogadro constant
D.
Boltzmann constant
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ANSWER :
D. Boltzmann constant
14.
The prefix 'femto' represents which multiple?
A.
10⁻¹⁵
B.
10⁻¹⁸
C.
10⁻¹²
D.
10⁻⁹
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ANSWER :
A. 10⁻¹⁵
15.
The SI unit of mass is defined by taking the fixed numerical value of:
A.
Speed of light
B.
Caesium frequency
C.
Elementary charge
D.
Planck's constant
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ANSWER :
D. Planck's constant
16.
Which statement about mass and weight is correct?
A.
Both mass and weight are constant everywhere
B.
Mass changes with location; weight is constant
C.
Both mass and weight vary with location
D.
Mass is constant; weight may vary with gravity
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ANSWER :
D. Mass is constant; weight may vary with gravity
17.
1 litre is equal to:
A.
100 cm³
B.
10000 cm³
C.
1000 cm³
D.
1 cm³
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ANSWER :
C. 1000 cm³
18.
If the SI unit of density is kg/m³, then density expressed in g/cm³ relates as: 1 g/cm³ equals:
A.
100 kg/m³
B.
10000 kg/m³
C.
10 kg/m³
D.
1000 kg/m³
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ANSWER :
D. 1000 kg/m³