Elements NDA Questions

NDA Chemistry

Elements MCQ Questions


1.
What are pure substances made up of?
A.
Elements only
B.
Compounds only
C.
Elements or compounds
D.
Mixtures of elements and compounds
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ANSWER :
C. Elements or compounds
2.
What instrument is used to image atoms on the surface of a material?
A.
Optical microscope
B.
Electron microscope
C.
X-ray machine
D.
MRI scanner
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ANSWER :
B. Electron microscope
3.
What is the smallest unit of an element that exhibits the properties of the element?
A.
Molecule
B.
Atom
C.
Compound
D.
Particle
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ANSWER :
B. Atom
4.
Which of the following properties exhibit periodic behavior in the periodic table?
A.
Atomic weight
B.
Number of protons
C.
Volume of the nucleus
D.
Atomic radius
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ANSWER :
D. Atomic radius
5.
Which of the following atomic properties shows regular periodicity?
A.
Atomic volume
B.
Nuclear charge
C.
Electronegativity
D.
Electron configuration
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ANSWER :
C. Electronegativity
6.
What is the smallest particle of an element?
A.
Molecule
B.
Compound
C.
Ion
D.
Atom
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ANSWER :
D. Atom