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MCQs

Total Questions : 622 | Page 55 of 63 pages
Question 541. Voltage which is applied in discovering electrons is
  1.    low
  2.    moderate
  3.    high
  4.    very low
 Discuss Question
Answer: Option C. -> high
Answer: (c).high
Question 542. Letter 'f' in azimuthal quantum number represents
  1.    fundamental
  2.    friction
  3.    force
  4.    first
 Discuss Question
Answer: Option A. -> fundamental
Answer: (a).fundamental
Question 543. Davisson performed his experiment in
  1.    1924
  2.    1927
  3.    1930
  4.    987
 Discuss Question
Answer: Option B. -> 1927
Answer: (b).1927
Question 544. Current does not flow in discharge tube even at voltage of
  1.    7000 volts
  2.    5000 volts
  3.    9000 volts
  4.    6000 volts
 Discuss Question
Answer: Option B. -> 5000 volts
Answer: (b).5000 volts
Question 545. Element which has [Ar]4s2 electronic configuration is
  1.    potassium
  2.    calcium
  3.    copper
  4.    zinc
 Discuss Question
Answer: Option B. -> calcium
Answer: (b).calcium
Question 546. Distance in lines of hydrogen spectrum increases when there is/are
  1.    decrease in wavelength
  2.    increase in wavelength
  3.    same waves
  4.    no effects
 Discuss Question
Answer: Option B. -> increase in wavelength
Answer: (b).increase in wavelength
Question 547. Spectrum has
  1.    three types
  2.    two types
  3.    five types
  4.    seven types
 Discuss Question
Answer: Option B. -> two types
Answer: (b).two types
Question 548. Pressure range which is applied in discharge tube is
  1.    9000-10000
  2.    7000-9000
  3.    4000-5000
  4.    5000-10000
 Discuss Question
Answer: Option D. -> 5000-10000
Answer: (d).5000-10000
Question 549. New element formed by reaction of alpha particles with Beryllium is
  1.    nitrogen
  2.    hydrogen
  3.    carbon
  4.    zinc
 Discuss Question
Answer: Option C. -> carbon
Answer: (c).carbon
Question 550. Heisenberg gave his concept in
  1.    1923
  2.    1927
  3.    1980
  4.    1990
 Discuss Question
Answer: Option B. -> 1927
Answer: (b).1927

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