Chemistry class 11

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


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