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MCQs

Total Questions : 95 | Page 3 of 10 pages
Question 21. Hapticity of cycloheptatrienein Mo(C7H8)(CO)3 is _______.
  1.    3
  2.    4
  3.    6
  4.    7
 Discuss Question
Answer: Option C. -> 6


-NA-


Question 22. Among the compounds given in the options A-D,the one that exhibits a sharp band at around 3300 cm“1 in the IR spectrum is
  1.    1,2-butadiene
  2.    1,3-butadiene
  3.    1-butyne
  4.    2-butyne
 Discuss Question
Answer: Option C. -> 1-butyne


-NA-


Question 23. The major product formed in the reaction of quinoline with potassium amide (KNH2) in liquid
ammonia is
  1.    .
  2.    .
  3.    .
  4.    .
 Discuss Question
Answer: Option B. -> .


-NA-


Question 24. The number of signals that appear in the proton decoupled 13C NMR spectrum of benzonitrile
(C7H5N) is ________.
  1.    5
  2.    10
  3.    15
  4.    25
 Discuss Question
Answer: Option A. -> 5


-NA-


Question 25. An organic compound Q exhibited the following spectral data:IR: 1760 cm-1
1H NMR: δ (ppm): 7.2 (1H, d, J = 16.0 Hz), 5.1 (1 H, m), 2.1 (3 H, s), 1.8 (3H, d, J = 7.0 Hz)13C NMR: δ (ppm): 170 (carbonyl carbon).Compound Q is
  1.    .
  2.    .
  3.    .
  4.    .
 Discuss Question
Answer: Option A. -> .


-NA-


Question 26. According to polyhedral electron count rule, the structure of Rh6(CO)16is
  1.    closo
  2.    nido
  3.    arachno
  4.    hypho
 Discuss Question
Answer: Option A. -> closo


-NA-


Question 27. The increasing order of melting points of the halides NaCl, CuCl and NaF is
  1.    CuCl < NaCl < NaF
  2.    NaF < NaCl < CuCl
  3.    NaF < CuCl < NaCl
  4.    CuCl < NaF < NaCl
 Discuss Question
Answer: Option A. -> CuCl < NaCl < NaF


-NA-


Question 28. Among the following octahedral complexes, the one that has the highest enthalpy of hydration is
  1.    [Ca(H2O)6]2+
  2.    [Mn(H2O)6]2+
  3.    [V(H2O)6]2+
  4.    [Cr(H2O)6]2+
 Discuss Question
Answer: Option C. -> [V(H2O)6]2+


-NA-


Question 29. The correct electronic configuration and spin only magnetic moment of Gd3+ (at.no. 64) are
  1.    [Xe]4f7 and 7.9 BM
  2.    [Xe]4f7 and 8.9 BM
  3.    [Xe]4f65d1 and 7.9 BM
  4.    [Rn]5f7 and 7.9 BM
 Discuss Question
Answer: Option A. -> [Xe]4f7 and 7.9 BM


-NA-


Question 30. A metal crystallizes in face-centered cubic lattice with a lattice parameter of 4.20 Ã…. The shortest atom to atom contact distance in the lattice is
  1.    4.20 Ã…
  2.    2.97 Ã…
  3.    2.42 Ã…
  4.    2.10 Ã…
 Discuss Question
Answer: Option B. -> 2.97 Ã…


-NA-


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