TS 10th Class Physical Science Bits Chapter 3 Acids, Bases, and Salts

These TS 10th Class Physical Science Bits with Answers Chapter 3 Acids, Bases, and Salts will help students to enhance their time management skills.

TS 10th Class Physical Science Bits Chapter 3 Acids, Bases, and Salts

Question 1.
Which of the following is the most accurate way of showing neutralization? ()
(A) acid+base → acid-base solution
(B) acid+base → salt+water
(C) acid +base → sodium chloride+hydrogen
(D) acid+base → neutral solution
Answer:
(B) acid+base → salt+water

Question 2.
The gas liberated when zinc reacts with dilute HCl is ()
(A) oxygen
(B) nitrogen
(C) carbon dioxide
(D) hydrogen
Answer:
(D) hydrogen

Question 3.
A metal that does not react with hydrochloric acid ( )
(A) Au
(B) Zn
(C) Mg
(D) all
Answer:
(A) Au

Question 4.
The acid formed when CO₂ is dissolved in water : ( )
(A) carboxyüc acid
(B) cifric acid
(C) carbonic acid
(D) all the above
Answer:
(C) carbonic acid

Question 5.
The salt formed when MgO reacts with sulphuric acid is ( )
(A) Mg₃S₂
(B) MgO₃
(C) MgSO₄
(D) MgSO₂
Answer:
(C) MgSO₄

Question 6.
The gas liberated when zinc reacts with sodium hydroxide. ( )
(A) CO₂
(B) H₂
(C) N₂
(D) SO₂
Answer:
(B) H₂

Question 7.
The acid which gives sour taste to pickles is ( )
(A) nitric acid
(B) sulphuric acid
(C) oxalic acid
(D) acetic acid
Answer:
(D) acetic acid

Question 8.
The acid formed when N₂O₅ is dissolved in water : ( )
(A) nitrous acid
(B) carbonic acid
(C) oxalic acid
(D) nitric acid
Answer:
(D) nitric acid

Question 9.
When sodium oxide es dissolved In water we get : ( )
(A) NaOH
(B) NaH₂
(C) NaCl
(D) Na(OH)₂
Answer:
(A) NaOH

Question 10.
A non-metallic oxide among the following is : ( )
(A) Na₂O
(B) CaO
(C) N₂O₃
(D) K₂O
Answer:
(C) N₂O₃

Question 11.
The nature of CaO is ( )
(A) acidic
(B) neutral
(C) amphoteric
(D) basic
Answer:
(D) basic

Question 12.
Litmus solution Is a dye extracted from: ( )
(A) eggshells
(B) blood of leaches
(C) lichen
(D) blood of crabs
Answer:
(C) lichen

Question 13.
The salt formed when zinc pieces react with dilute HC1 : ( )
(A) ZnO
(B) ZnCl₂
(C) Zn2Cl₃
(D) Zn(OH)₂
Answer:
(B) ZnCl₂

Question 14.
Baking powder contains a mild edible acid called ( )
(A) tartaric acid
(B) oxalic acid
(C) carbonic acid
(D) palmitic acid
Answer:
(A) tartaric acid

Question 15.
The precipitate formed when CO₂ is passed through lime water : ( )
(A) CaCO₃
(B) CaHCO₃
(C) Ca(HCO₃)₂
(D) CaCl₂
Answer:
(A) CaCO₃

Question 16.
The balanced equation showing the reaction between copper oxide and Hydrochloric acId. ( )
(A) CuO+2HCl → Cu(OH)₂+Cl₂
(B) CuO+2HCl → CuHOCI+O₂
(C) CuO+2HCl → CuCl₂+ H₂O
(D) CuO+2HCl → CuHCl+O₂
Answer:
(C) CuO+2HCl → CuCl₂+ H₂O

Question 17.
These oxides are generally acidic in nature: ( )
(A) metallic oxides
(B) non-metallic oxides
(C) neutral oxides
(D) Amphoteric oxides
Answer:
(B) non-metallic oxides

Question 18.
The acid obtained when common salt reacts with dilute sulphuric acid is( )
(A) nitric acid
(B) carbonic acid
(C) citric acid
(D) hydrochloric add
Answer:
(D) hydrochloric add

Question 19.
Buttermilk contains the following acid : ( )
(A) citric acid
(B) tactic acid
(C) butyric acid
(D) carbonic acid
Answer:
(B) tactic acid

Question 20.
The vitamin which is mostly present In citric acid : ( )
(A) vitamin A
(B) vitamin B₁₂
(C) vitamin E
(D) vitamin C
Answer:
(D) vitamin C

Question 21.
The substance that does not show acidic property when dissolved In water: ( )
(A) HCl gas
(B) CO₂ gas
(C) SO₂ gas
(D) glucose
Answer:
(D) glucose

Question 22.
The pH of blood is about ( )
(A) 4.8 to 7.5
(B) 6.4 to 6.9
(C) 7.32 to 7.45
(D) 1 to 2
Answer:
(C) 7.32 to 7.45

Question 23.
The concentration of H ions in a solution whose pH is 8. ( )
(A) log 10^-8
(B) 10⁸
(C) 8¹⁰
(D) 10^-8
Answer:
(D) 10^-8

Question 24.
If bases are heated we get : ( )
(A) non-metallic oxides
(B) metallic oxides
(C) neutral oxides
(D) amphoteric oxides
Answer:
(D) amphoteric oxides

Question 25.
pH= ( )
(A) -log [H⁺]
(B) \(\frac{1}{\log \left[\mathrm{H}^{+}\right]} \)
(C) \(-\frac{1}{\log \left[\mathrm{H}^{+}\right]} \)
(D) both A & B
Answer:
(A) -log [H⁺]
(B) \(\frac{1}{\log \left[\mathrm{H}^{+}\right]} \)

Question 26.
A common substance which behaves as a base in aqueous solution ( )
(A) CO₂
(B) ZnO
(C) NH₃
(D) P₂O₅
Answer:
(C) NH₃

Question 27.
Common salt Is obtained by the neutralization of sodium hydroxide with ( )
(A) nitric acid
(B) carbonic acid
(C) sulphuric acid
(D) hydrochloric acid
Answer:
(D) hydrochloric acid

Question 28.
The substances which are soapy to touch ( )
(A) acids
(B) alcohols
(C) diamonds
(D) bases
Answer:
(D) bases

Question 29.
Which of the following has the highest pH value? ( )
(A) lemon Juice
(B) grape Juice
(C) urine
(D) blood
Answer:
(B) grape Juice

Question 30.
Identify the base among: ( )
(A) SO₂
(B) SO₃
(C) NH₃
(D) P₂O₅
Answer:
(C) NH₃

Question 31.
The anhydride of Carbonic acid ( )
(A) CO₂
(B) CO
(C) SO₂
(D) N₂O₃
Answer:
(A) CO₂

Question 32.
The pH range of acids is ( )
(A) 7 to 14
(B) 0 to 14
(C) 5 to 12
(D) 0 to 7
Answer:
(D) 0 to 7

Question 33.
The pH range of bases is ( )
(A) 0 to 14
(B) 7 to 14
(C) 5 to 12
(D) 10 to 7
Answer:
(B) 7 to 14

Question 34.
The antacid tablets contain ( )
(A) strong acid
(B) strong base
(C) weak acid
(D) weak base
Answer:
(D) weak base

Question 35.
Aqueous solutions of non-metallic oxides are : ( )
(A) bases
(B) acids
(C) salts
(D) hydrides
Answer:
(B) acids

Question 36.
The pH of gastric Juice ês ( )
(A) O
(B) 7
(C) >7
(D) <7
Answer:
(D) <7

Question 37.
“NaOH is a strong base” – the reason is ( )
(A) It gives large number of Na⁺ ions
(B) its ionization Is less
(C) gives large number of H⁺ ions
(D) none of these
Answer:
(A) It gives large number of Na⁺ ions

Question 38.
The negative logarithm of hydrogen ion molar concentration in a solution is called ( )
(A) Avogadro numter
(B) oxidation number
(C) pH
(D) molarity
Answer:
(C) pH

Question 39.
Acids form the following ions In water ( )
(A) H₃O
(B) OH^–
(C) H⁺
(D) HO^–₂
Answer:
(A) H₃O

Question 40.
To prevent tooth decay we have to use toothpastes more of ……………………… nature. ( )
(A) acidic
(B) basic
(C) saltish
(D) neutral
Answer:
(B) basic

Question 41.
The ionic compounds which are produced by the neutralization of acid with base are ( )
(A) alkalies
(B) de-odourants
(C) antacids
(D) salts
Answer:
(D) salts

Question 42.
Aqueous solution of sodium chloride is called : ( )
(A) hypo
(B) brine
(C) phenol
(D) alcohol
Answer:
(B) brine

Question 43.
The chemical formula of Baking soda : ( )
(A) NaHCO₃
(B) Na₂CO₃
(C) Na₂SO₄
(D) Na₂S₂O₃
Answer:
(A) NaHCO₃

Question 44.
The chemical formula of bleaching powder: ( )
(A) Ca(OH)₂
(B) CaHCO₃
(C) CaOCl₂
(D) NaHCO₃
Answer:
(C) CaOCl₂

Question 45.
The salt used in removing permanent hardness of water ( )
(A) sodium hydrogen carbonate
(B) sodium thiosulphate
(C) sodium chloride
(D) sodium carbonate
Answer:
(D) sodium carbonate

Question 46.
The number of water molecules present in one formula unit of sodium carbonate : ( )
(A) 5
(B) 10
(C) 7
(D) 2
Answer:
(B) 10

Question 47.
The chemical formula of hydrated copper sulphate is : ( )
(A) CuSO₄.7H₂O
(B) CuSO₄.10H₂O
(C) CuSO₄.2H₂O
(D) CuSO₄.5H₂O
Answer:
(D) CuSO₄.5H₂O

Question 48.
The common name of calcium sulphate hemihydrate is ( )
(A) Plaster of paris
(B) Blue vitriol
(C) Baking soda
(D) Hypo
Answer:
(A) Plaster of Paris

Question 49.
Baking soda on heating Is converted into: ( )
(A) alum
(B) washing soda
(C) caustic soda
(D) hypo
Answer:
(B) washing soda

Question 50.
The chemical formula of milk of magnesia is ( )
(A) MgCO₃
(B) MgCl
(C) Mg(OH)₂
(D) MgSO₄
Answer:
(C) Mg(OH)₂

Question 51.
Which of the following elements forms an acidic oxide? ( )
(A) Mg
(B) Na
(C) P
(D) Al
Answer:
(C) P

Question 52.
pH for base is more than ………….. . ( )
(A) 4
(B) 3
(C) 7
(D) 5
Answer:
(C) 7

Question 53.
H₂O+ …………………….. → H₃O⁺ ( )
(A) H⁺
(B) OH^–
(C) H₂O
(D) H₃O
Answer:
(A) H⁺

Question 54.
Which of the following substance has the lowest pH value? ( )
(A) sugar
(B) tomato juice
(C) vineger
(D) washing soda
Answer:
(C) vineger

Question 55.
The acid forms In stomach is …………………………… ( )
(A) HCl
(B) H₂SO₄
(C) CH₃COOH
(D) HNO₃
Answer:
(A) HCl

Question 56.
Many salts absorb water from atmosphere this property is called ………………….. .()
(A) Crystallisatlon
(B) Hydration
(C) Deliquenscene
(D) Efflorescene
Answer:
(A) Crystallisatlon

Question 57.
Non-metallIc oxides are …………………….. In nature. ( )
(A) neutral
(B) basic
(C) acidic
(D) non-metallic
Answer:
(C) acidic

Question 58.
The acidity of acids Is formed due to ……………………. produced. ( )
(A) H⁺ or H₃O⁺ ions
(B) OH^– ions
(C)Cl^–
(D) Mg²⁺
Answer:
(A) H⁺ or H₃O⁺ ions

Question 59.
The acid is …………………… ( )
(A) dry HCl gas
(B) NaOH solution
(C) Na₂SO₄
(D) Aqueous solution of HCl
Answer:
(D) Aqueous solution of HCl

Question 60.
Weak acid is ………………… ( )
(A) HCl
(B) NaOH
(C) Mg(OH)₂
(D) CH₃COOH
Answer:
(D) CH₃COOH

Question 61.
ApproxImate pH value of milk is …………….. . ( )
(A) 3.4
(B) 6.6
(C) 7.5
(D) 9
Answer:
(B) 6.6

Question 62.
…………………… is produced by the action of chlorine on dry slaked lime. ( )
(A) Bleaching powder
(B) Washing soda
(C) Baking soda
(D) Sodium chloride
Answer:
(A) Bleaching powder

Question 63.
The calcium sulphate hemi hydrate is …………………….. . ( )
(A) Gypsum
(B) Slaked lime
(C) Plaster of Paris
(D) Quick lime
Answer:
(C) Plaster of Paris

Question 64.
On dissolving bases In water produces …………………. ions. ( )
(A) hydrogen
(B) hydroxide
(C) chlorine
(D) magnesium
Answer:
(B) hydroxide

Question 65.
Acid rain occurs when pH value of rain water is less than ……………………….. .
(A) 6.5
(B) 5.6
(C) 7.2
(D) 2.7
Answer:
(B) 5.6

Question 66.
………………………. is a mild non-corrosive base.
(A) Baking soda
(B) Bleaching Powder
(C) Plaster of Paris
(D) Gypsum
Answer:
(A) Baking soda

Question 67.
Litmus solution is a dye extracted from ………………. . ( )
(A) Tree
(B) Aloevera
(C) Uchen
(D) Litmus
Answer:
(C) Uchen

Question 68.
To overcome Indigestion problem ……………………… tablets are used. ( )
(A) antacid
(B) paracetamol
(C) aspirin
(D) acidity
Answer:
(A) antacid

Question 69.
The process of dissolving an acid or a base in water is an ……………… process.
(A) exothermic
(B) endothermic
(C) neutralisation
(D) oxidation
Answer:
(A) exothermic

Question 70.
Acids or bases are mixed with ………………………. to dilute. ( )
(A) water
(B) carbon
(C) each other
(D) oxygen
Answer:
(A) water

Question 71.
As the pH value increases from 7, it represents a ……………….. in H₃O⁺ ion concentration. ( )
(A) increase
(B) decrease
(C) disappearance
(D) addition
Answer:
(B) decrease

Question 72.
If pH of rain water is less than 5.6, it is called …………………… ( )
(A) water
(B) heavy rain
(C) normal rain
(D) acid rain
Answer:
(B) heavy rain

Question 73.
Chemical formula of common salt is …………………….. . ( )
(A) Na₂CO₃
(B) NaCl
(C) NaHCO₃
(D) CaSO₄
Answer:
(B) NaCl

Question 74.
The reagent used in the preparation of chloroform is …………………….. . ( )
(A) CaOCl₂
(B) CaSO₄
(C) NaHCO₃
(D) Na₂CO₃
Answer:
(A) CaOCl₂

Question 75.
One of the ingredlants in antacids is …………………. . ( )
(A) Na₂CO₃
(B) CaOCl₂
(C) CaSO₄
(D) NaHCO₃
Answer:
(D) NaHCO₃

Question 76.
…………………… are sour to taste ard turn blue litmus to …………………. . ( )
(A) Bases, red
(B) Bases, blue
(C) Acids, red
(D) Acids, blue
Answer:
(C) Acids, red

Question 77.
…………………….. is example of synthetic indicator. ( )
(A) Acid
(B) Red litmus
(C) Blue litmus
(D) Phenolphthalein
Answer:
(D) Phenolphthalein

Question 78.
When base reacts with metal ………………………. gas is evolved. ( )
(A) O
(B) H₂
(C) Cl₂
(D) CO₂
Answer:
(B) H₂

Question 79.
Non-metallic oxides are ……………………. in nature. ( )
(A) acidic
(B) basic
(C) neutral
(D) effervescence
Answer:
(A) acidic

Question 80.
Mixing an acid or base with water is a process called …………….. . ( )
(A) dilution
(B) concentration
(C) addition
(D) substitution
Answer:
(A) dilution

Question 81.
The pH value In acidic solution is ………………….. . ( )
(A) 7
(B) >7
(C) <7
(D) No value
Answer:
(C) <7

Question 82.
Acids that give less H₃O⁺ ions are said to be ………………… . ( )
(A) strong acid
(B) strong base
(C) weak base
(D) weak acid
Answer:
(D) weak acid

Question 83.
Tooth decay starts when the pH of the mouth is lower than …………………….. . ( )
(A) 6.3
(B) 7.2
(C) 8.5
(D) 5.5
Answer:
(D) 5.5

Question 84.
…………………………… is also known as table salt or common salt. ( )
(A) sodium chloride
(B) sodium carbonate
(C) sodium hydrogen carbonate
(D) magnesium chloride
Answer:
(A) sodium chloride

Question 85.
Bleaching powder is produced by the action of …………………… on dry slaked lime. ( )
(A) sodium
(B) chlorine
(C) magnesium
(D) hydrogen
Answer:
(B) chlorine

Question 86.
(1) Acid (A) Red cabbage solution ( )
(2) Base (B) Na₂CO₃
(3) Neutral (C) MgO
(4) Indicator (D) CO₂
(5) SaIt (E) NaCI
(A) 1-A, 2-B, 3-C, 4-E, 5-D
(B) 1-C, 2-B, 3-A, 4-D, 5-E
(C) 1-D, 2-C, 3-E, 4-A, 5-B
(D) 1-D, 2-C, 3-A, 4-B, 5-E
Answer:
(C) 1-D, 2-C, 3-E, 4-A, 5-B

Question 87.
Which one of the following types of medicines is used for treating indigestion ( )
(A) antibiotic
(B) analgesic
(C) antacid
(D) antiseptic
Answer:
(C) antacid

Question 88.
Many salts absorb water from atmosphere. This property is called ( )
(A) crystallisation
(B) hydration
(C) deliquescence
(D) efflorescence
Answer:
(C) deliquescence

Question 89.
The natural Indicator among the following is ( )
(A) phenolphthalein
(B) Methyl orange
(C) Methyl red
(D) Litmus
Answer:
(D) Litmus

Question 90.
An aqueous solution of sodium acetate will turn ( )
(A) Methyl orange yellow
(B) Red litmus blue
(C) Phenolphthaleiri solution pink
(D) all of these
Answer:
(D) all of these

Question 91.
An aqueous solution of which of the following substances will conduct electric current? ( )
(A) ethyl alcohol
(B) acetic acid
(C) acetone
(D) ethen
Answer:
(B) acetic acid

Question 92.
The acid formed In stomach which help in digestion is a dilute solution of ()
(A) HCl
(B) H₂SO₄
(C) CH₃COOH
(D) Citric acid
Answer:
(C) CH₃COOH

Question 93.
A few drops of methyl orange are added to a soap solution the colour of the solution becomes ( )
(A) Orange
(B) Yellow
(C) Pink
(D) Remains colourless
Answer:
(B) Yellow

Question 94.
A solution turned pink when a drop of phenolphthalein was added to it. Then the probable pH of that solution is …………………….. .( )
(A) 5
(B) 6
(C) 7
(D) 10
Answer:
(D) 10