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Q81:

Which one of the following is not formed when acetone reacts with 2-pentanone in the presence of dilute NaOH followed by heating?

1.
2.
3.
4.

Subtopic: Name Reaction |

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Level 3: 35%-60%

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Q82:

In the neutral or faintly alkaline medium, \(KMnO_4 \) oxidises iodide into iodate. The change in oxidation state of manganese in this reaction is from:

1.	+6 to +5	2.	+7 to +4
3.	+6 to +4	4.	+7 to +3

Subtopic: d-Block Elements- Properties & Uses |

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Level 2: 60%+

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Q83:

Compound X on reaction with \(O_3\) followed by \(\mathrm{Zn/ H_2O}\) gives formaldehyde and 2-methyl propanal as products. The compound X is:

1.	Pent-2-ene	2.	3-Methylbut-1-ene
3.	2-Methylbut-1-ene	4.	2-Methylbut-2-ene

Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |

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Q84:

For the reaction \(3 \mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{O}_{3}(\mathrm{g}) \) at 298 K, \(\text K_c\) is found to be \(3.0 \times 10^{-59} \). If the concentration of \(\text O_2\) at equilibrium is 0.040 M, then the concentration of \(\text O_3 \) in M is:

1. \(1.2 \times 10^{21} \)
2. \(4.38 \times 10^{-32} \)
3. \(1.9 \times 10^{-63} \)
4. \(2.4 \times 10^{31} \)

Subtopic: Introduction To Equilibrium |

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Level 2: 60%+

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Q85:

If radius of second Bohr orbit of the \(He^+\) ion is 105.8 pm, what is the radius of third Bohr orbit of \(Li^{2+}\) ion?

1.	158.7 Å	2.	158.7 pm
3.	15.87 pm	4.	1.587 pm

Subtopic: Hydrogen Spectra |

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Q86:

The correct IUPAC name of the following compound is :

1. 6-Bromo-4-methyl-2-chlorohexan-4-ol
2. 1-Bromo-5-chloro-4-methylhexan-3-ol
3. 6-Bromo-2-chloro-4-methylhaxan-4-ol
4. 1-Bromo-4-methyl-5-chorohexan-3-ol

Subtopic: Nomenclature |

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Q87:

Given below are two statements:

Statement I:	In Lucas test, primary, secondary, and tertiary alcohols are distinguished on the basis of their reactivity with conc. \(HCl + ZnCl_2\), known as Lucas Reagent.
Statement II:	Primary alcohols are most reactive and immediately produce turbidity at room temperature on reaction with Lucas Reagent.

In light of the above statements, choose the most appropriate answer from the options given below:

1.	I is incorrect but II is correct
2.	Both I and II correct
3.	Both I and II are incorrect
4.	I is correct but II is incorrect

Subtopic: Alcohols: Preparation & Properties |

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Level 1: 80%+

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Q88:

The order of energy absorbed, which is responsible for the color of complexes, is:
\((A) \ \left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}(\text { en })_{2}\right]^{2+}\)
\( (B) \ \left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}(\mathrm{en})\right]^{2+} \)\( (C) \ \left[\mathrm{Ni}(\mathrm{en})_{3}\right]^{2+}\)

1.	B > A > C	2.	A > B > C
3.	C > B > A	4.	C > A > B

Subtopic: VBT, CFT & their Limitations |

66%

Level 2: 60%+

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Q89:

Find the emf of the cell in which the following reaction takes place at 298 K:
\(\mathrm{Ni}(\mathrm{s})+2 \mathrm{Ag}^{+}(0.001 \mathrm{M}) \rightarrow \mathrm{Ni}^{2+}(0.001 \mathrm{M})+2 \mathrm{Ag}(\mathrm{s}) \)

\(\small{\text { (Given that } \mathrm{E}_{\text {cell }}^{\circ}=1.05 \mathrm{~V}; \dfrac{2.303 \mathrm{RT}}{\mathrm{F}}=0.059} )\)