PYQ Vault
EbooksTutor

Day 371: JEE Mains Chemistry

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

  1. Question 1

    Chemical Bonding and Molecular Structure. Asked once: 2021 Paper 24 (same type asked 9 times) See all 9 of this type

    58
    The spin-only magnetic moment value of B2+B_{2}^{+} species is ×10−2BM\times10^{- 2}BM. (Nearest integer) [Given: 3=1.73\sqrt{3}= 1.73 ]

  2. Question 2

    Some Basic Concepts of Chemistry. Asked once: 2021 Paper 19 (same type asked 9 times) See all 9 of this type

    56
     100 mL\ 100\text{ }mL of Na3PO4Na_{3}PO_{4} solution contains 3.45 g3.45\text{ }g of sodium. The molarity of the solution is ×10−2\times10^{- 2} mol L  −1\ ^{- 1}. (Nearest integer) [Atomic Masses - Na : 23.0 u, O : 16.0 u, P : 31.0 u]

  3. Question 3

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 2021 Paper 9 (same type asked 8 times) See all 8 of this type

    42
    Compound with molecular formula C3H6OC_{3}H_{6}O can show:

    Tap an option to check your answer.

  4. Question 4

    Some Basic Concepts of Chemistry. Asked once: 25 Jun 2022 (same type asked 8 times) See all 8 of this type

    60
    Number of grams of bromine that will completely react with 5.0 g5.0\text{ }g of pent-1-ene is xx 10−2 g10^{- 2}\text{ }g. (Atomic mass of Br=80 g/molBr = 80\text{ }g/mol ) [Nearest Integer)

  5. Question 5

    Some Basic Concepts of Chemistry. Asked once: 2021 Paper 14 (same type asked 8 times) See all 8 of this type

    42
    Fe2+Fe^{2 +} reacts with K2Cr2O7K_{2}Cr_{2}O_{7} in acidic medium. Volume of Fe2+=10mlFe^{2 +}= 10ml, Volume of K2Cr2O7=15mlK_{2}Cr_{2}O_{7}= 15ml. molarity of K2Cr2O7=0.1MK_{2}Cr_{2}O_{7}= 0.1M Find the molarity of Fe2+Fe^{2 +}