Chemistry class 11

byMahanand Tudu -
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SELF EVALUATION - 1

  1. How many scientific fundamental quantities are given in S.I. units ?
    1. 5
    2. 7
    3. 3
    4. 9


  2. The amount of CO₂ that could be produced when one mole of carbon is burnt in air, is
    1. 22 g
    2. 50 g
    3. 44 g
    4. 56 g


  3. A solution contains 8 mole of solute and the mass of solvent is 4 kg. What is the molality of this solution?
    1. 5 mol/kg
    2. 8 mol/kg
    3. 4 mol/kg
    4. 2 mol/kg


  4. The empirical formula of the compound glucose is
    1. CH₂O
    2. CHO
    3. C₆H₁₂O₆
    4. C₁₂H₂₂O₁₁


  5. Calculate the number of electrons, protons and neutrons in ₃₅Br⁸⁰ .
    1. 35, 45, 35
    2. 35, 35, 45
    3. 35, 36, 45
    4. 36, 35, 45


  6. When an electron jumps from 3 rd orbit to 2 nd orbit , which series of spectral lines is obtained?
    1. Balmer
    2. Lyman
    3. Paschen
    4. Brackett


  7. What will be the wavelength of a ball of mass 0.1 kg moving with a velocity of 10 m/s ?
    1. 6.626 × 10⁻³⁰ m
    2. 6.626 × 10⁻³² m
    3. 6.626 × 10⁻³³ m
    4. 6.626 × 10⁻³⁴ m


  8. Maximum number of electrons in 4d orbital is
    1. 14
    2. 10
    3. 8
    4. 6


  9. Which of the following principles/ rules states that the electron enters the subshell that has the lowest energy ?
    1. Pauli exclusion principle
    2. Aufbau principle
    3. Hund's rule
    4. Heisenberg uncertainty principle


  10. To which block is an element having electronic configuration [Ar]4s¹3d¹⁰ related ?
    1. s-block
    2. p-block
    3. d-block
    4. f-block


  11. How many groups are present in the modern periodic table?
    1. 15
    2. 18
    3. 10
    4. 20


  12. O²⁻ , F⁻, Na⁺ and Mg²⁺ are called as
    1. isoelectronic species
    2. isoneutral species
    3. isotopes
    4. isobars


  13. Which of the following configurations has the highest ionisation energy ?
    1. ns²np³
    2. ns²np²
    3. ns²np¹
    4. ns²np⁶


  14. The dipole moment of BeCl₂ is
    1. less than zero
    2. more than zero
    3. zero
    4. 1.85 D


  15. The numbers of σ and π bonds in a molecule of benzene are
    1. 6σ and 6π
    2. 12σ and 6π
    3. 12σ and 12π
    4. 12σ and 3π


  16. The bond angle between two bonds in a linear molecule is
    1. 108°
    2. 180°
    3. 74•5°
    4. 90°


  17. The hybridisation of P in PCl₅ is
    1. dsp²
    2. sp³d
    3. sp²d²
    4. spd³


  18. What is the shape of the molecule NH₃?
    1. square pyramidal
    2. V - shape
    3. Trigonal pyramidal
    4. Tetrahedral


  19. For the process to occur under isothermal condition, the correct condition is
    1. q = 0
    2. ∆q = 0
    3. ∆T = 0
    4. T = 0


  20. The enthalpies of all the elements in their standard states are
    1. unity
    2. zero
    3. positive
    4. negative


  21. The enthalpies of combustion of methane, graphite and hydrogen at 298K are -890•3, -393•5 and -285•8 in kJ/ mol respectively. Enthalpy of formation of CH₄(g) will be
    1. -74•8 kJ mol⁻¹
    2. -52•27 kJ mol⁻¹
    3. +74•8 kJ mol⁻¹
    4. +52•26 kJ mol⁻¹


  22. If ∆G < 0; then the process is
    1. spontaneous
    2. in equilibrium
    3. non- spontaneous
    4. none of these


    23. For a reversible reaction A + B ⇌ C + D , the equilibrium constant K is equal to
    1. [A][B]/[C][D]
    2. [C][A]/[B][D]
    3. [C][D]/[B][A]
    4. [A][D]/[B][C]


  24. The conjugate acid of NH₃ is
      ₄
    1. NH₂⁻
    2. NH₄⁺
    3. NH²⁻
    4. N₂H₄


  25. What is the effect of addition of H₂ on the equilibrium of the reaction 2H₂(g) + CO (g) ⇌ CH₃OH (g) ?
    1. Reaction will proceed in the direction of reactants
    2. No effect on equilibrium
    3. Reaction will proceed in the direction of products
    4. none of these


  26. The value of pH of 0•1 M NaOH solution is equal to
    1. 13
    2. 1•2
    3. 5•0
    4. 1•0


  27. What is the oxidation state of S in H₂SO₄ ?
    1. +4
    2. +5
    3. +6
    4. +8


  28. In the reaction CuO(s) + H₂(g) → Cu(s) + H₂O(g) oxidising agent is
    1. CuO
    2. H₂
    3. Cu
    4. H₂O


  29. The number of electrons transferred in the given half reaction is MnO₄⁻(aq) +8H⁺ (aq) → Mn²⁺(aq) + 4H₂O(l)
    1. 2
    2. 3
    3. 5
    4. 7


  30. 3Mg(s) + N₂ (g) ⟶ Mg₃N₂(s)
    1. Decomposition reaction
    2. Combination reaction
    3. Displacement reaction
    4. Combustion reaction


  31. IUPAC name of CH₃CH₂COCH₂CH₃ is
    1. Butan-2-ol
    2. Butanal
    3. Pentan-3-one
    4. Pentanal


  32. Which of the following is an electrophile ?
    1. NH₃
    2. CN⁻
    3. -COOH
    4. Cl⁺


  33. Functional group isomer of CH₃-O-CH₃ is
    1. CH₃CH₂OH
    2. CH₃CHO
    3. CH₃COCH₃
    4. CH₃COOH


  34. Which of the following is not an example of electron displacement effect in covalent bond?
    1. inductive effect
    2. Resonance effect
    3. Hyperconjugation
    4. Distillation


  35. (CH₃)₃C⁺ is
    1. Isopropyl free radical
    2. Phenyl free radical
    3. Benzyl free radical
    4. Tert-butyl free radical


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