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Day 53: JEE Mains Chemistry

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

  1. Question 1

    Biomolecules. This type asked 3 times: 2021 Paper 13, 22 Jan 2025, 2 Apr 2026 S1. This one: 2 Apr 2026 S1 See all 3 of this type

    44
    Match List-I with List-II.
    List-I (Vitamin)List-II (Name)
    (A)Vitamin B1B_{1}(I)Pyridoxine
    (B)Vitamin B2B_{2}(II)Ascorbic acid
    (C)Vitamin B6B_{6}(III)Thiamine
    (D)Vitamin C(IV)Riboflavin
    Choose the correct answer from the options given below:

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  2. Question 2

    Electrochemistry. This type asked 3 times: 25 Jun 2022, 5 Apr 2024, 2 Apr 2026 S1. This one: 2 Apr 2026 S1 See all 3 of this type

    32
    An electrochemical cell is constructed using half cells in the direction of spontaneous change: Fe(OH)2( s)+2e−→Fe(s)+2OH−(aq) E0=−0.88 VFe(OH)_{2}(\text{ }s) + 2e^{-}\rightarrow Fe(s) + 2OH^{-}(aq)\ E^{0}= - 0.88\text{ }V and AgBr(s)+e−→Ag(s)+Br−(aq) E0=+0.07 VAgBr(s) +e^{-}\rightarrow Ag(s) +Br^{-}(aq)\ E^{0}= + 0.07\text{ }V Which of the following option is correct?

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  3. Question 3

    Alcohols, Phenols and Ethers. This type asked 3 times: 10 Apr 2023, 22 Jan 2026 S2, 28 Jan 2026 S2. This one: 28 Jan 2026 S2 See all 3 of this type

    31
    The reactions which produce alcohol as the product are: (A) CH4+O2→Mo2O3 Δ{CH}_{4} + O_{2}\underset{\mathrm{\Delta}}{\overset{{Mo}_{2}O_{3}\ }{\rightarrow}} (B) 2CH3CH3+3O2→Δ(CH3COO)2Mn2CH_{3}CH_{3} + 3O_{2}\xrightarrow[\Delta]{(CH_{3}COO)_{2}Mn} (C) (CH3)3CH→KMnO4(CH_{3})_{3}CH\xrightarrow{KMnO_{4}} (D) 2CH4+O2→Cu/523 K/100 atm2CH_{4} + O_{2}\xrightarrow{Cu/523\ K/100\ atm} (E) CH3−CH=CH−CH3→KMnO4/H+ {CH}_{3} - CH = CH - {CH}_{3}\overset{{KMnO}_{4}/H^{+}\ }{\rightarrow} Choose the correct answer from the options given below:

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  4. Question 4

    Structure of Atom. This type asked 3 times: 26 Jul 2022, 6 Apr 2023, 28 Jan 2026 S2. This one: 28 Jan 2026 S2 See all 3 of this type

    46
    Two positively charged particles m1m_{1} and m2m_{2} have been accelerated across the same potential difference of 200 keV as shown below. [Given mass of m1=1amum_{1} = 1amu and m2=4amum_{2} = 4amu ] The DE Broglie wavelength of m1m_{1} will be x times of m2m_{2}. The value of x is ____\_\_\_\_ (nearest integer)

  5. Question 5

    The d- and f-Block Elements. This type asked 3 times: 27 Jul 2022, 24 Jan 2026 S2, 28 Jan 2026 S2. This one: 28 Jan 2026 S2 See all 3 of this type

    32
    Consider the following statements about manganate and permanganate ions. Identify the correct statements : (A) The geometry of both manganate and permanganate ions is tetrahedral. (B) The oxidation states of Mn in manganate and permanganate are +7 and +6 , respectively. (C) Oxidation of Mn (II) salt by peroxodisulphate gives manganate ion as the final product. (D) Manganate ion is paramagnetic and permanganate ions is diamagnetic. (E) Acidified permanganate ion reduces oxalate, nitrite and iodide ions. Choose the correct answer from the options given below.

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