Chemical Engineering - Chemical Engineering Basics

6. 

Number of electrons in the outermost orbit of a semi-conductor is

A. 2
B. 4
C. 6
D. 8

Answer: Option B

Explanation:

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7. 

The condition of diffraction from a crystal is given by

A. nλ = 2d Sin θ
B. λ = d Sin 2θ
C. λ = 2d Sin 2θ
D. nλ = d Sin θ

Answer: Option A

Explanation:

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8. 

Galena is an ore of

A. iron
B. copper
C. lead
D. aluminium

Answer: Option C

Explanation:

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9. 

A reduction process is accompanied with increase in the

A. number of electrons.
B. oxidation number.
C. both (a) & (b).
D. neither (a) nor (b).

Answer: Option A

Explanation:

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10. 

Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught.

A. natural
B. induced
C. forced
D. chimney

Answer: Option A

Explanation:

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