Acids, Bases and Salts Test 02

Total Questions: 43

2 - A conjugate base is a specie formed by donating a ____ by an acid:

A ) Proton ✅
B ) electron pair
C ) neutron
D ) electron

3 - A substance which can behave as an acid has been as a base is called:

A ) acid
B ) base
C ) amphoteric specie ✅
D ) neutral specie

4 - According to Lewis concept a base is a substance which can you donate:

A ) Proton
B ) electron pair ✅
C ) neutron
D ) electron

5 - The product of any Lewis acid base reaction is a single specie called:

A ) salt
B ) water
C ) adduct ✅
D ) None of these

6 - Citric acid is present in:

A ) citrus fruits ✅
B ) sour milk
C ) rancid butter
D ) apple

7 - Formic acid is present in:

A ) stings of bees ✅
B ) sour milk
C ) apple
D ) fats

8 - Butyric acid is present in:

A ) citrus fruits
B ) sour milk
C ) rancid butter ✅
D ) apple

9 - Malic acid is present in:

A ) apple ✅
B ) fats
C ) Stings of bees
D ) urine

10 - Uric acid is present in:

A ) apple
B ) fats
C ) urine ✅
D ) grapes

11 - Stearic acid is present in:

A ) apples
B ) fats ✅
C ) urine
D ) grapes

12 - The value of constant of ionic product of water Kw at 25⁰C is:

A ) 1.0 x 10-⁴
B ) 1.0 x 10 -¹⁴ ✅
C ) 1.0 x 10⁷
D ) 1.0 x 10-⁷

13 - pH of natural solution is always:

A ) 6
B ) 5
C ) 7 ✅
D ) 10

14 - Acidic solutions have pH value:

A ) less than 7 ✅
B ) greater than 7
C ) equal to 7
D ) none of these

15 - Basic solutions have pH value:

A ) less than 7 ✅
B ) greater than 7
C ) equal to 7
D ) none of these

16 - Indicators are the:

A ) inorganic compounds
B ) organic compounds ✅
C ) ionic compounds
D ) covalent compounds

17 - Phenolphthalein produces Red colour in:

A ) acid
B ) base ✅
C ) both (a) &( b)
D ) none of these

18 - Methyl orange products which colour in basic solution:

A ) red
B ) yellow ✅
C ) pink
D ) white

19 - Sum of the pH and pOH at 25⁰C is:

A ) 7
B ) 12
C ) 14 ✅
D ) 16

20 - Which one acid is used for etching glass:

A ) HF ✅
B ) HCl
C ) HBr
D ) HI

21 - Lactic acid is found in:

A ) citrus fruit
B ) sour milk ✅
C ) rancid butter
D ) apple

22 - Which of the following does not have pH value greater than 7:

A ) Shampoo
B ) detergents
C ) butter ✅
D ) soap

23 - Which acid is used to manufacture fertilizers like calcium superphosphate:

A ) hydrochloric acid
B ) benzoic acid
C ) acetic acid
D ) sulphuric acid ✅

26 - Alkalis on reaction with the salts of heavy metals produce which of the following:

A ) hydroxides ✅
B ) peroxides
C ) oxides
D ) all of these

27 - Sodium bisulphite ( NaHSO3)2 on reaction with HCI produces:

A ) salt
B ) water
C ) sulphur dioxide gas
D ) all of these ✅

28 - Brown ppt of Fe( OH)3 are produced when FeCI3 reacts with a/an:

A ) base ✅
B ) acid
C ) salt
D ) none of these

29 - Which of the following statements is an incorrect:

A ) All Lewis bases are also Bronsted bases
B ) All Bronsted acids are not Lewis acids
C ) Lewis bases generally contain one or more lone pair of electrons
D ) All Lewis acids are also Bronsted acids ✅

30 - Which of the following acids is used to cure the sting of wasps:

A ) sulphuric acid
B ) acetic acid ✅
C ) benzoic acid
D ) nitric acid

31 - pH value from 8–10 indicates a/an ____solution:

A ) highly acidic
B ) neutral
C ) Slightly basic ✅
D ) highly basic

33 - pH is used to:

A ) determine acidic or basic nature of solution
B ) Produce medicines
C ) prepare solutions of required concentrations
D ) all of these

34 - Which of the following is a much more reliable and accurate method of measuring pH of solution:

A ) litmus paper
B ) universal indicator
C ) pH meter ✅
D ) none of these

35 - pH of 0.01M H2SO4 solution is:

A ) 10
B ) 2
C ) 1.7 ✅
D ) O.3

36 - NH4NO3 is an example of a:

A ) normal salt ✅
B ) acidic salts
C ) basic salts
D ) mixed salt

37 - Which of the following reactions is an example of direct displacement method:

A ) reaction between and acid and base
B ) reaction between and acid and metallic oxide
C ) reaction between an acid and a metal ✅
D ) reaction between an acid and a carbonate

38 - Bleaching powder Ca( OCI)CI is an example of:

A ) acidic salt
B ) basic salt
C ) double salt
D ) mixed salt ✅

40 - Salt used in purple and paper industries is:

A ) sodium carbonate ✅
B ) sodium silicate
C ) sodium chlorate
D ) sodium tetraborate

41 - Acidic salts react with bases to form:

A ) natural salts ✅
B ) basic salts
C ) complex salts
D ) double salts

42 - Which of the following is not are use of calcium chloride?

A ) de-icing of roads in winter
B ) use as a drying agent
C ) manufacture of flint glass ✅
D ) use as a freezing agent

43 - Potassium nitrate is used to:

A ) prepare plaster of Paris
B ) Prepare slaked lime
C ) manufacture glazes and enamels
D ) manufacture flint glass ✅