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MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

A monoprotic acid in 1.00 M solution is 0.01% ionised. The dissociation constant of this acid is

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

Which of the following is the weakest acid?

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

Which  equilibrium  can  be  described  as  an  acid-base reaction using the Lewis’s acid-base definition, but not using Bronsted-Lowry definition ?

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

Pure water is kept in a vessel and it remains exposed to atmospheric CO2 which is absorbed, then its pH will be

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

Arrange NH ,H O,H O ,HF and  OH  in increasing order of acidic nature. (a) H O NH HF OH H O (b) NH HF H O H O OH (c) HO H O NH HF H O (d) H O HF H O NH OH

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

Which  of  the  following  is  least  likely  to  behave  as Lewis’s base?

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

Which one of the following molecular hydrides acts as a Lewis’s acid?

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

Which of the following molecules acts as Lewis acid?

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

The strongest conjugate base is (a) NO

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

Which of the following is not Lewis’s acid ?

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

BF3 is acid according to

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

In the reaction I I I -> the Lewis’s base is

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

The conjugate base of HPO  is (a) PO (b) H PO

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

According to Lewis concept, acid is

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

According to Lowry and Bronsted system, the chloride ion (Cl–) in aqueous solution is a

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

The conjugate base of a weak acid is

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

Of the given anions, the strongest Bronsted base is

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

Review the equilibrium and choose the correct statement HClO4 + H2O   H3O + + ClO4 –

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

The conjugate acid of HPO4 2– is

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

Conjugate base of NH3 is (a) NH (b) NH (c) NH

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

The correct order of acid strength is

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

Cl – is the conjugate base of

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

The conjugate base of NH2 – is

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibrium

A weak acid, HA has a Ka of 1.00 10 x . If 0.100 mole of this acid is dissolved in 1 L of water, the percentage of acid dissociated at equilibrium is closest to

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryHydrogen

In which of the following reactions H2O acts as a bronsted acid? (a) 3 aq aq 4 aq H O NH OH NH l (b) aq aq aq H O H S H O HS l (c) aq aq H O H O H O OH l l (d) aq aq H OH H O ( ) ( ) l

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