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Class 10 Science Acid base and Salts Important Problem



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Multiple Choice questions

Question 1
When a solution of an acid contains larger amount of acid, it is said to be-
(a) Dilute
(b) concentrated
(c)Monobasic
(d) polybasic
Question 2
Metals like sodium, potassium and calcium react with an acid to liberate-
(a) CO2
(b) NH3
(c)O2
(d)H2
Question 3
Which of the following is a weak acid?
(a) sulphuric acid
(b) hydrochloric acid
(c) acetic acid
(d) nitric acid
Question 4
The chemical formula of baking soda is
(a)Na2Co3
(b) Na2Co3.10H2O
(c) NaHCO3
(d) NaOH
Question 5
Which of the following phenomena occur, when a small amount of acid is added to water?
(a) ionization
(b) Neutralization
(c) Dilution
( d) Salt formation
Question 6
Salt form during reaction of sulphuric acid with copper
(a)Na2SO4
(b) CuSO4
(c) K2SO4
(d) NH4CI
Question 7
CuSO4. K2SO4   is
(a)acid salt
(b) a mixed salt
(c) normal salt
(d) double salt
Question 8
The acid present in vinegar
(a)citric acid
(b) tartaric acid
(c) ascorbic acid
(d) acetic acid
Question 9
Acid reacts with---------- of metals to form salt and water.
(a)hydroxide
(b) carbonates
(c) oxides
(d) sulphides
Question 10
Which of these bases is not an alkali?
(a)NaOH
(b) NH4OH
(c) AI (OH)3
(d) all of the are alkalies
Question 11
Which substance is used to purify water—
(a)Ammonium chloride
(b) copper sulphate
(c) chlorine
(d) none of these
Question 12
H3PO4 is the example of-
(a)hydracids
(b) organic acid
(c) oxyacid
(d) salt
Question 13
To protect tooth decay we are advised to brush our teeth regularly. The nature of the tooth paste commonly used is
(a) acidic
(b) neutral
(c) basic
(d) corrosive
Question 14
Which of the following substance will not give carbon dioxide on treatment with dilute acid?
(a)Marble
(b)Limestone
(c) Baking soda
(d)Lime
Question 15
A compound that reacts with an acid to form a salt and water is called-       
(a)base
(b) alkali
(c) solution
(d) none of these
Question 16
An indicator is what type of compound?
(a) reducing agent
(b) strong base or acid
(c) weak base or acid
(d) salt
Question 17
H2SO4 can be prepared by reaction of water with-
(a)NO2
(b) SO2
(c) N2O
(d) SO3
Question 18
The acidity of Fe(OH)3 is
(a)2
(b) 3
(c) 4
(d) 5
Question 19
The example of olfactory indicators is
(a) Methyl orange
(b) onion
(c) blue litmus
(d) phenolphthalein



Question 20
The aqueous solution of sodium acetate is
(a)basic
(b) neutral
(c) acidic
(d) none of these

Answer:
(2) (d)
(3) (c)
(4) (c)
(5) (a) and (c)
(6) (b)
(8) (d)
(9)  (c)
(13) (c)
(14) (d)
(15) (b)
(16) (c)
17) (d)
(19) (b)
(20) (a)

 


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