Multiple Choice Question For Practice: 1. Some Basic Concept Of Chemistry.

Multiple Choice Question For Practice:

1. Some Basic Concept Of Chemistry.

1. The phlogiston theory was suggested for

    a) neutralization reaction  b) oxidation reaction

    c) reduction reaction         d) combustion reaction

2. Atom is the smallest particle of

    a) compound                       b) substance

    c) mixture                            d) element

3. Molecule is the smallest particle of

    a) compound                      b) substance

    c) mixture                            d) element

4. Avogadro’s number is the number of particles present in

    a) 1 molecule                      b) 1 atom

    c) 1 kg                                  d) 1 mole

5. 1 mole of any pure gas at STP can occupy volume is equal to  

    a) 22.414 dm³                      b) 0.022414 m³

    c) 22414 cm³                        d) all of these

2. States of matter (gases and liquids): 

1. The physical state of a substance with lot of empty intermolecular space is

    a) solid                             b) liquid

    c) gas                               d) plasma

     

2. The intermolecular force of attraction between methane molecule is

    a) dipole-dipole interaction

    b) ion-dipole- interaction

    c) dipole-induced dipole interaction                                     

    d) dispersion forces    

3) London forces are present between

    a) KI and I₂                       b) H₂O and H₂O

    c) Na⁺ and H₂O                d) CH₄ and CH₄   

 

4) The temperature 99°F is equal to……

    a) 48.5°C                           b) 60.3°C

    c) 37.22°C                         d) 54.5°C    

5) The gas that liquefies at lowest temperature is,

    a) CO₂                               b) Cl₂

    c) N₂                                 d) He    

6) Which of the following species can form hydrogen bond with water

    a) CH₄                               b) HCOOH

    c) Na⁺                               d) C₆H₆     

7) Which of the following species can form hydrogen bond with themselves

    a) NH₃                               b) C₂H₆

    c) H₂S                                d) CH₃OCH₃ 

   

8) The liquid with maximum viscosity is

    a) water                           b) acetone

    c) glycol                           d) glass  

9) Critical temperature of CO₂ gas is

    a) 30.98°C                        b) 53°C

    c) 73°C                              d) 21.5°C  

  

10) Critical pressure of CO₂ gas is

    a) 63 atm                         b) 30.98 atm

    c) 53 atm                         d) 73 atm  

3. Structure of atom:

1. In Rutherford’s experiment most of the alpha

  particles were, 

    a) passed undeflected  b) deflected

    c) thrown back               d) absorbed    

2. An electron has principle quantum number 2. The number of sub shells and orbitals would be respectively,

    a) 2 and 3       b) 2 and 5       c) 2 and 7      d) 2 and 4

3. For the Azimuthal quantum number , the maximum number of electrons will be,

    a) 4            b) 10                     c) 14               d) 11   

4. Which of the following electrons have highest energy?

    a) 2s         b) 2p                      c) 1s             d) 4p  

5. If m = 0, electron is present in,

    a) s-orbital      b) p-orbital   c) d-orbital   d) f-orbital   

6. Which of the following can for hydrogen bond with water?

    a) s-orbital     b) p-orbital    c) d-orbital     d) f-orbital

7. The relation  represents,

    a) de-Broglie equation

    b) Heisenberg’s uncertainty principle

    c) Schrodinger wave equation

    d) Pauli’s exclusion principle  

8. The energy of electrons in the same subshell is…

    a) different     b) zero           c) infinite         d) same   

9. Angular momentum of the electron is defined by the quantum number that is denoted as,

    a) n                   b)                   c) s                    d)m   

10. The orbital with n = 3 and  = 2 is,

    a) 3s                  b) 3p               c) 3d                  d) 3f   

11. The maximum number of electrons in a subshell is  

    given by expression

    a) n²                  b) 2 n²             c) 2 (2  + 1)      d) n-1 

12. The value of Azimuthal quantum number is 2, there  

    will be = value of magnetic quantum number.

    a) 2                    b) 3                   c) 4                  d) 5