An organic compound ‘X’ having molecular formula C₅H₁₀O yields phenyl hydrozone and gives negative response to the Iodoform test and Tollen’s test.It produces n-pentane on reduction.’X’ could be
Options
(a) 2-pentanone (b) 3-pentanone […]
Which of these statements about [CO(CN)₆]³⁻ is true
Options
(a) [CO(CN)₆]³⁻ has four unpaired electrons and will be in a low-spin configuration (b) [CO(CN)₆]³⁻ has four unpaired electrons and will be in a […]
Cobalt(III) chloride forms several octahedral complexes with ammonia. which of the following will not give test of chloride ions with silver nitrate at 25⁰C
Options
(a) CoCl₃.4NH₃ (b) CoCl₃.5NH₃ (c) CoCl₃.6NH₃ (d) CoCl₃.3NH₃
The angular momentum of electron in ‘d’ orbital is equal to
Options
(a) √2 h (b) 2√3 h (c) 0h (d) √6 h
Correct Answer:
√6 h
Explanation:
No explanation available. Be the […]
Because of lanthanoid contraction,which of the following pairs of elements have nearly same atomic radii?(Numbers in the parenthesis are atomic numbers)
Options
(a) Zr(40)andNb(41) (b) Zr(40) and Hf(72) (c) Zr(40) and Ta(73) (d) […]
Which of the following processes does not involve oxidation of iron
Options
(a) Decolourization of blue CuSO₄ solution by iron (b) Formation of Fe(CO)₅ from Fe (c) Lineration of H₂ from steam by […]
The number of d-electrons in Fe²⁺(Z=26) is not equal to the number of electrons in which one of the following
Options
(a) p-electrons in Cl(Z=17) (b) d-electrons in Fe(Z=26) (c) p-electrons in Ne(Z=10) […]
The reaction of aqueous KMnO₄ with H₂O₂ in acidic conditions gives
Options
(a) Mn⁴⁺ and O₂ (b) Mn²⁺ and O₂ (c) Mn²⁺ and O₃ (d) Mn⁴⁺ and MnO₂
Correct Answer:
Mn²⁺ and O₂
Explanation: […]
Reason of lanthanoid contraction is
Options
(a) negligible screening effect of ‘f’-orbitals (b) increasing nuclear charge (c) decreasing nuclear charge (d) decreasing screening effect
Correct Answer:
negligible screening effect of ‘f’-orbitals
Explanation:
No […]
Magnetic moment 2.83 BM is given by which of the following ions
Options
(a) Ti³⁺ (b) Ni²⁺ (c) Cr³⁺ (d) Mn²⁺
Correct Answer:
Ni²⁺
Explanation:
Magnetic moment µ=√n(n+2) 2.83=√n(n+2) On solving n=2 Ni²⁺ […]
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