Water is well known amphoprotic solvent. In which chemical reacti

Subject

Chemistry

Class

JEE Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

1.

Which of the following sets of qunatum numbers correct?

  • n =5, l=4, m=0, s=+1/2

  • n= 3, l=3, m=+3, s= +1/2

  • n=6, l=0, m=+1, s= =1/2

  • n=4, l= 2, m=+2, s=0


2.

Which of the following behaves as Lewis acid and not as Bronsted acid ?

  • HCl

  • H2SO4

  • HSO3-

  • SO3


3.

The pair of elements having approximately equal ionisation potential is

  • Al, Ga

  • Al, Si

  • Al, Mg

  • Al, B


Advertisement

4.

Water is well known amphoprotic solvent. In which chemical reaction water is behaving as a base?

  • H2SO4 + H2O → H3O+ HSO4-

  • H2O + H2O → H3O+ + OH-

  • H2O + NH2- → NH+ OH-

  • H2O + NH3 → NH4+ + OH-


A.

H2SO4 + H2O → H3O+ HSO4-

According to Bronsted-Lowry concept, bases are the substance which have a tendency to accept a proton.

(a) H2SO4acid + H2Obase  H3O+ conjugate acid+ HSO4-Conjugated base(b) H2Oacid + H2Obase  H3O+conjugate acid + OH-Conjugated base(c) H2Oacid + NH2-base  NH3conjugate acid + OH-Conjugated base(d) H2Oacid + NH3base  NH4+conjugate acid + OH-Conjugated base


Advertisement
Advertisement
5.

Which of the following is not a equilibrium ?

  • Ice  Water

  • I2(s)  I2(g)

  • S (l)  S (g)

  • 3O2 2O3


6.

2.5 L of NaCl solution contain 5 moles of the solute. What is the molarity ?

  • 5 M

  • 2 M

  • 2.5 M

  • 12.5 M


7.

The calculated bond order in O2- ions is

  • 1

  • 1.5

  • 2

  • 2.5


8.

The entropy of a perfectly crystalline material is zero at 0°C. This is statement of

  • first law of thermodynamics

  • second law of thermodynamics

  • third law of thermodynamics

  • law of conservation of energy


Advertisement
9.

In acidic medium, the equivalent weight of  K2Cr2O7 ( Mol. wt. = M) is

  • M

  • M/2

  • M/3

  • M/6


10.

When a metal atom combines with a non-metal atom, the non-metal atom will

  • lose electrons and decrease in size

  • lose electrons and increase in size

  • gain electrons and decrease in size

  • gain electrons and increase in size 


Advertisement