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PERIODIC CLASSIFICATION OF ELEMENTS MCQs

Total Questions : 24 | Page 1 of 3 pages
Question 1. An element M is in group 13th of the periodic table, the formula for its oxide is
  1.    MO
  2.    M2O3
  3.    M3O2
  4.    None
 Discuss Question
Answer: Option B. -> M2O3
Question 2. Choose the correct statement from the following:
  1.    Mendeleev considered oxides and halides made by elements as criteria for classification
  2.    Newland's law of octaves was valid upto the element vanadium
  3.    Doberieneer could identify only 5 triads
  4.    modern periodic table removed the anomaly of position of isotopes
 Discuss Question
Answer: Option D. -> modern periodic table removed the anomaly of position of isotopes
Question 3. What happens to the electropositive character of elements on moving from left to right in a periodic table?
  1.    Increases
  2.    Decreases
  3.    First increases than decreases
  4.    First decreases than increases
 Discuss Question
Answer: Option B. -> Decreases
Question 4. The properties of eka-aluminium predicted by Mendeleev are the same as the properties of later discovered element
  1.    Scandium
  2.    Germanium
  3.    Gallium
  4.    Aluminium
 Discuss Question
Answer: Option C. -> Gallium
Question 5. At the time of Mendeleev, the number of elements known was
  1.    62
  2.    61
  3.    63
  4.    56
 Discuss Question
Answer: Option C. -> 63
Question 6. _____ group contains the member ofhalogen family
  1.    17th
  2.    15th
  3.    18th
  4.    16th
 Discuss Question
Answer: Option A. -> 17th
Question 7. Chemical formula of rust is ________
  1.    FeO.xH2O
  2.    FeO4.xH2O
  3.    Fe2O3.xH2O
  4.    FeO
 Discuss Question
Answer: Option C. -> Fe2O3.xH2O
Question 8. If the distance between two Cl atoms in Cl2molecule is 1
  1.    0.99 Å
  2.    0.09 Å
  3.    0.90 Å
  4.    0.98 Å
 Discuss Question
Answer: Option A. -> 0.99 Å
Question 9. Upto which element, the Law of Octaves was found applicable?
  1.    CALCIUM
  2.    MAGNESIUM
  3.    ALUMINIUM
  4.    POTASSIUM
 Discuss Question
Answer: Option A. -> CALCIUM
Question 10. Which of the following belong to same period?Element A B C D EAtomic No 3 2 14 9 6
  1.    DEA
  2.    BCD
  3.    ABC
  4.    ADE
 Discuss Question
Answer: Option D. -> ADE

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