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MCQs

Total Questions : 622 | Page 1 of 63 pages
Question 1. Value of 'm' depends upon values of
  1.    s
  2.    l
  3.    d
  4.    f
 Discuss Question
Answer: Option B. -> l
Answer: (b).l
Question 2. To explain origin of spectral lines
  1.    one quantum number is sufficient
  2.    no quantum number is needed
  3.    one quantum number is not enough
  4.    one quantum number adds up with another one
 Discuss Question
Answer: Option C. -> one quantum number is not enough
Answer: (c).one quantum number is not enough
Question 3. Balmer series were discovered in
  1.    1867
  2.    1887
  3.    1789
  4.    1901
 Discuss Question
Answer: Option B. -> 1887
Answer: (b).1887
Question 4. Aluminium foil causes cathode rays to
  1.    pass through it
  2.    struck in it
  3.    distort
  4.    loose their identity
 Discuss Question
Answer: Option A. -> pass through it
Answer: (a).pass through it
Question 5. Distance between two adjacent crests or troughs is called
  1.    wave number
  2.    frequency
  3.    wave length
  4.    radiation
 Discuss Question
Answer: Option C. -> wave length
Answer: (c).wave length
Question 6. Elements which are found on their own as free elements are
  1.    gold and silver
  2.    coal and gold
  3.    nitrogen and gold
  4.    gold and mercury
 Discuss Question
Answer: Option C. -> nitrogen and gold
Answer: (c).nitrogen and gold
Question 7. Losing a small molecule from the original organic molecule is
  1.    elimination reaction
  2.    substitution reaction
  3.    addition reaction
  4.    none of above
 Discuss Question
Answer: Option A. -> elimination reaction
Answer: (a).elimination reaction
Question 8. Chemical elements contains only
  1.    one type of atom
  2.    two type of atom
  3.    molecules
  4.    ions
 Discuss Question
Answer: Option A. -> one type of atom
Answer: (a).one type of atom
Question 9. 1.67x10⁻²⁷ kg is the weight of a single atom of
  1.    oxygen
  2.    nitrogen
  3.    hydrogen
  4.    water
 Discuss Question
Answer: Option C. -> hydrogen
Answer: (c).hydrogen
Question 10. The most composition of sun is mainly
  1.    oxygen and hydrogen
  2.    hydrogen
  3.    hydrogen and helium
  4.    helium
 Discuss Question
Answer: Option C. -> hydrogen and helium
Answer: (c).hydrogen and helium

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