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Day 58: JEE Mains Chemistry

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

  1. Question 1

    Biomolecules. This type asked 3 times: 9 Apr 2024, 29 Jan 2025, 21 Jan 2026 S1. This one: 21 Jan 2026 S1 See all 3 of this type

    42
    Identify the correct statements. (A) Arginine and Tryptophan are essential amino acids. (B) Histidine does not contain heterocyclic ring in its structure. (C) Proline is a six membered cyclic ring amino acid. (D) Glycine does not have chiral centre. (E) Cysteine has characteristic feature of side chain as MeS−CH2−CH2−MeS - {CH}_{2} - {CH}_{2} -. Choose the correct answer from the options given below.

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  2. Question 2

    Some Basic Concepts of Chemistry. This type asked 3 times: 29 Jan 2023, 1 Feb 2024, 21 Jan 2026 S1. This one: 21 Jan 2026 S1 See all 3 of this type

    31
    80 mL of a hydrocarbon on mixing with 264 mL of oxygen in a closed U-tube undergoes complete combustion. The residual gases after cooling to 273 K occupy 224 mL. When the system is treated with KOH solution, the volume decreases to 64 mL. The formula of the hydrocarbon is :

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  3. Question 3

    Electrochemistry. This type asked 3 times: 31 Jan 2023, 29 Jan 2025, 7 Apr 2025. This one: 7 Apr 2025 See all 3 of this type

    119
    Given below are two statements : 1 M aqueous solution of each of Cu(NO3)2Cu\left( NO_{3} \right)_{2}, AgNO3,Hg2(NO3)2;Mg(NO3)2AgNO_{3},Hg_{2}\left( NO_{3} \right)_{2};Mg\left( NO_{3} \right)_{2} are electrolysed using inert electrodes, Given : EAg+/Agθ=0.80 V,EHg22+/Hgθ=0.79 VE_{{Ag}^{+}/Ag}^{\theta} = 0.80\text{ }V,E_{{Hg}_{2}^{2 +}/Hg}^{\theta} = 0.79\text{ }V,
    ECu2+/Cuθ=0.24 V and EMg2+/Mgθ=−2.37 VE_{{Cu}^{2 +}/Cu}^{\theta} = 0.24\text{ }V\text{~and~}E_{{Mg}^{2 +}/Mg}^{\theta} = - 2.37\text{ }V
    Statement (I) : With increasing voltage, the sequence of deposition of metals on the cathode will be Ag,HgAg,Hg and Cu Statement (II) : Magnesium will not be deposited at cathode instead oxygen gas will be evolved at the cathode. In the light of the above statement, choose the most appropriate answer from the options given below

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  4. Question 4

    Electrochemistry. This type asked 3 times: 27 Jun 2022, 5 Apr 2024, 7 Apr 2025. This one: 7 Apr 2025 See all 3 of this type

    35
    Given below are two statements: Statement I : Mohr's salt is composed of only three types of ions-ferrous, ammonium and sulphate. Statement II : If the molar conductance at infinite dilution of ferrous, ammonium and sulphate ions are x1,x2x_{1},x_{2} and x3 S cm2 mol−1x_{3}\text{ }S{\text{ }cm}^{2}{\text{ }mol}^{- 1}, respectively then the molar conductance for Mohr's salt solution at infinite dilution would be given by x1+x2+2x3x_{1} + x_{2} + 2x_{3} In the light of the given statements, choose the correct answer from the options given below

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  5. Question 5

    Equilibrium. This type asked 3 times: 25 Jan 2023, 12 Apr 2023, 7 Apr 2025. This one: 7 Apr 2025 See all 3 of this type

    30
    An aqueous solution of HCl with pH 1.0 is diluted by adding equal volume of water (ignoring dissociation of water). The pH of HCl solution would.(Given log⁡2=0.30\log2 = 0.30 )

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