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Day 304: JEE Mains Chemistry

5 questions. Try each one first, then open its answer.

  1. Question 1

    Coordination Compounds. Asked once: 28 Jun 2022 (same type asked 4 times) See all 4 of this type

    59
    Number of complexes which will exhibit synergic bonding amongst, [Cr(CO)6],[Mn(CO)5]\left\lbrack Cr(CO)_{6} \right\rbrack,\left\lbrack Mn(CO)_{5} \right\rbrack and [Mn2(CO)10]\left\lbrack Mn_{2}(CO)_{10} \right\rbrack is

  2. Question 2

    Aldehydes, Ketones and Carboxylic Acids. Asked once: 2021 Paper 4 (same type asked 4 times) See all 4 of this type

    44
    The correct order of acid character of the following compounds (I), (II), (III) and (IV) shown below is:

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  3. Question 3

    Chemical Kinetics. Asked once: 2021 Paper 12 (same type asked 4 times) See all 4 of this type

    34
    PCl5→PCl3+Cl2PCl_{5}\rightarrow PCl_{3}+Cl_{2} The above first order reaction has initial moles as 10 and after 20 min⁡20\text{ }\min final moles are 2. Find the rate constant. (Given: log⁡5=0.693\log5 = 0.693 )

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  4. Question 4

    Alcohols, Phenols and Ethers. Asked once: 29 Jul 2022 (same type asked 4 times) See all 4 of this type

    50
    A compound ' XX ' is acidic and it is soluble in NaOHNaOH solution, but insoluble in NaHCO3NaHCO_{3} solution. Compound ' XX ' also gives violet colour with neutral FeCl3FeCl_{3} solution. The compound ' XX ' is:

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  5. Question 5

    Amines. Asked once: 22 Jan 2025 (same type asked 4 times) See all 4 of this type

    43
    The products formed when nitrobenzene is taken through the following reaction sequence are : →(i)Br2AcoH(ii)Sn, HCl   A+B(iii)NaNO2, HCl, 273K(iv)C2H5OH\underset{\begin{array}{r} \left( iii \right)NaNO_{2},\ HCl,\ 273K \\ \left( iv \right)C_{2}H_{5}OH \end{array}}{\overset{\begin{array}{r} \left( i \right)Br_{2}AcoH \\ \left( ii \right)Sn,\ HCl \\ \ \end{array}}{\rightarrow}\ \ A + B}

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