EASY
Earn 100

Mineral acids are stronger acids than carboxylic acids because 

i Mineral acids are completely ionised

ii Carboxylic acids are completely ionised 

iii Mineral acids are partially ionised 

iv Carboxylic acids are partially ionised 

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Important Questions on Acids, Bases and Salts

MEDIUM
Which of the following indicators is not an acid- base indicator?
MEDIUM
Which of the following is a dibasic acid?
EASY
The indicators which turn red in acid solution are:
EASY
Which acid is present in tomato?
EASY
One of the following is not an organic acid.This is 
EASY
What happens, when methyl orange solution mixed with HCl?
HARD

The salt solution which does not react with ammonium hydroxide is:

MEDIUM
The conjugate bases of Bronsted acids H2O and HCl are respectively:
EASY
Select the mineral acid from the following 
EASY
Which one of the following is the weakest acid?
MEDIUM
Read the following statement about (NH4)2SO4 and choose the correct option. 
I. It is a salt of strong acid and a strong base. 
II. Ammonium sulphate solution turns blue litmus into red. 
III. Solution of this salt contains more hydrogen ions than hydroxide ions. 
IV. Aqueous solution of this salt behaves like NH4Cl solution with litmus paper.
EASY

Give the appropriate term defined by the statement given below:

The substance that releases hydronium ion as the only positive ion when dissolved in water

HARD
Conjugate acid-base pair is
EASY
Which of these can be olfactory indicator?
MEDIUM
A solution turns methyl orange into yellow the approximate pH of solution is
MEDIUM

You are provided with aqueous solutions of three salts A, B and C23 drops of blue litmus solution, red litmus solution and phenolphthalein were added to each of these solutions in separate experiments. The change in colour of different indicators were recorded in the following table:

Sample  With blue litmus solution   With red litmus solution    With phenolphthelein
     A            No change            Turns blue          Turns pink
     B            No change            No change          No change
    C            Turns red            No change          No change

On the basis of above observations, identify A, B and C from the following options:

MEDIUM
Sulphur powder is heated on a spatula. A piece of both, moist blue and red litmus papers are brought one by one near the gas evolved during heating. The action of gas on the moist litmus papers will be:
EASY

Assertion: The amphoteric behaviour of water is explained by Lewis acid base theory

Reason: water acts as acid with NH3 and base with H2S

MEDIUM
Name the element which is common to all acids? 
EASY
Which of the following is a Bronsted-Lowry acid ?