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Day 105: JEE Mains Chemistry

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

  1. Question 1

    Some Basic Concepts of Chemistry. This type asked 2 times: 2021 Paper 21, 8 Apr 2023. This one: 8 Apr 2023 See all 2 of this type

    59
    Three bulbs are filled with CH4,CO2CH_{4},CO_{2} and NeNe as shown in the picture. The bulbs are connected through pipes of zero volume. When the stopcocks are opened and the temperature is kept constant throughout, the pressure of the system is found to be ____atm. (Nearest integer)

  2. Question 2

    Organic Chemistry - Some Basic Principles and Techniques. This type asked 2 times: 2021 Paper 6, 6 Apr 2023. This one: 6 Apr 2023 See all 2 of this type

    32
    Match List I with List II
    List I (Element detected)List II (Reagent used / product formed)
    AA
    		NitrogenI.
    Na2[Fe(CN)5NO]Na_{2}\left\lbrack Fe(CN)_{5}NO \right\rbrack
    BB
    		SulphurII.
    AgNO3AgNO_{3}
    CC
    		PhosphorousIII.
    Fe4[Fe(CN)6]3Fe_{4}\left\lbrack Fe(CN)_{6} \right\rbrack_{3}
    DD
    		HalogenIV.
    (NH4)2MoO4\left( NH_{4} \right)_{2}MoO_{4}
    Choose the correct answer from the options given below:

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  3. Question 3

    Solutions. This type asked 2 times: 25 Jan 2023, 6 Apr 2023. This one: 6 Apr 2023 See all 2 of this type

    143
    Consider the following pairs of solution which will be isotonic at the same temperature. The number of pairs of solutions is/are A. 1M1M aq. NaClNaCl and 2M2M aq. Urea B. 1M1M aq. CaCl2CaCl_{2} and 1.5M1.5M aq. KClKCl C. 1.5M1.5M aq. AlCl3AlCl_{3} and 2M2M aq. Na2SO4Na_{2}SO_{4} D. 2.5M2.5M aq. KClKCl and 1M1M aq. Al2(SO4)3Al_{2}\left( SO_{4} \right)_{3}

  4. Question 4

    Biomolecules. This type asked 2 times: 28 Jul 2022, 1 Feb 2023. This one: 1 Feb 2023 See all 2 of this type

    40
    The correct representation in six membered pyranose form for the following sugar [X]\lbrack X\rbrack is

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  5. Question 5

    Coordination Compounds. This type asked 2 times: 25 Jun 2022, 31 Jan 2023. This one: 31 Jan 2023 See all 2 of this type

    146
    If the CFSE of [Ti(H2O)6]3+\left\lbrack Ti\left( H_{2}O \right)_{6} \right\rbrack^{3 +} is −96.0 kJ mol−1-96.0\text{ }kJ\text{ }mol^{- 1}, this complex will absorb maximum at wavelength ____ nmnm. (nearest integer) Assume Planck's constant ( h)=6.4×10−34Jsh) = 6.4 \times10^{- 34}Js, Speed of light (c) =3.0×108 m s−1= 3.0 \times10^{8}\text{ }m\text{ }s^{- 1} and Avogadro's Constant (NA)=6×1023 mol−1\left( N_{A} \right)= 6 \times10^{23}\text{ }mol^{- 1}