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10th Standard English Medium Science Subject Atoms and Molecules Book Back 4 Mark Questions with Solution Part - I updated Book back Questions

10th Standard English Medium Science Subject Atoms and Molecules Book Back 4 Mark Questions with Solution Part - I

10th Standard

    Reg.No. :
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Science

Time : 00:30:00 Hrs
Total Marks : 20
    5 x 4 = 20

  1. Calculate the number of water molecule present in one drop of water which weighs 0.18 g.

  2. Calculate the number of moles in
    (i) 27g of Al
    (ii) 1.51 × 1023 molecules of NH4Cl

  3. Derive the relationship between Relative molecular mass and Vapour density.

  4. Calculate the % of each element in calcium carbonate. (Atomic mass: C-12, O-16, Ca -40).

  5. Calculate the % relative abundance of B -10 and B -11, if its average atomic mass is 10.804 amu.

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