General Knowledge - Chemistry

Exercise :: Chemistry - Section 1

  • Chemistry - Section 1
31. 

The number of waves in n x 10th Bohr's orbit are

A. n2
B. n
C. n-2
D. n3

Answer: Option B

Explanation:

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32. 

The mass of one Avogadro number of helium atom is

A. 1.00 gram
B. 4.00 gram
C. 8.00 gram
D. 4 x 6.02 x 1023 gram

Answer: Option B

Explanation:

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33. 

The items amenable to detection by soft x-rays are

A. contrabands
B. lead in bullets
C. narcotics
D. genuine coins from counterfeit coins

Answer: Option D

Explanation:

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34. 

The material which can be deformed permanently by heat and pressure is called a

A. thermoplastic
B. thermoset
C. chemical compound
D. polymer

Answer: Option B

Explanation:

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35. 

The mass number of a nucleus is

A. always less than its atomic number
B. the sum of the number of protons and neutrons present in the nucleus
C. always more than the atomic weight
D. a fraction

Answer: Option B

Explanation:

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36. 

The inexpensive and commonly used variety of glass is called soda glass. It is called so because

A. was used initially for making bottles of soda(carbonated drink)
B. is made using soda(sodium carbonate)
C. was initially used for storing sodium carbonate
D. is made using soda lime

Answer: Option B

Explanation:

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