Chemistry > Elements

COMPOUNDS AND MIXTURES MCQs

Total Questions : 740

Page 1 of 74 pages
Question 1. Isomers of butane are
  1.    2
  2.    5
  3.    8
  4.    10
 Discuss Question
Answer is Option A. -> 2
Answer: (a).2
Question 2. An efficient antiknock agent is
  1.    n-octane
  2.    Iso-octane
  3.    TEL
  4.    Iso-heptane
 Discuss Question
Answer is Option C. -> TEL
Answer: (c).TEL
Question 3. Elements at the top right of periodic table are
  1.    Metals
  2.    Non-metals
  3.    Metalloids
  4.    None of above
 Discuss Question
Answer is Option B. -> Non-metals
Answer: (b).Non-metals
Question 4. Ionization energy of Mg → Mg +1 +1e¯ is
  1.    513 KJ/mol
  2.    738 KJ/mol
  3.    1451 KJ/mol
  4.    1480 KJ/mol
 Discuss Question
Answer is Option B. -> 738 KJ/mol
Answer: (b).738 KJ/mol
Question 5. The percentage of 's' and 'p' in sp3 is respectively
  1.    25 % and 75 %
  2.    33 % and 66 %
  3.    50 % and 50 %
  4.    30 % and 70 %
 Discuss Question
Answer is Option B. -> 33 % and 66 %
Answer: (b).33 % and 66 %
Question 6. The oxidation state of Cl in HClO₄ is
  1.    1
  2.    6
  3.    7
  4.    8
 Discuss Question
Answer is Option C. -> 7
Answer: (c).7
Question 7. Non-metallic character of an element decreases as the
  1.    Atomic size increases
  2.    Atomic size decreases
  3.    High nuclear charge
  4.    Low nuclear charge
 Discuss Question
Answer is Option A. -> Atomic size increases
Answer: (a).Atomic size increases
Question 8. Atomic radius decreases from left to right in the period due to
  1.    Increase in atomic number
  2.    Same Number of shells
  3.    Same shielding effect
  4.    All of above
 Discuss Question
Answer is Option D. -> All of above
Answer: (d).All of above
Question 9. The charge which is present on an element in a compound is called its
  1.    Boiling point
  2.    Melting point
  3.    Oxidation state
  4.    Metallic character
 Discuss Question
Answer is Option C. -> Oxidation state
Answer: (c).Oxidation state
Question 10. The elements at the bottom of groups VA and VIA are
  1.    Highly metallic
  2.    Poorly metallic
  3.    Fairly metallic
  4.    fairly non-metallic
 Discuss Question
Answer is Option C. -> Fairly metallic
Answer: (c).Fairly metallic