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Acids, Bases and Salts Science - Acids, Bases and Salts

CBSE - STD 10 - Science (CBSE - English Medium). 601 questions in this chapter.

Question types

Acids, Bases and Salts question types

601 questions across 12 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

601
Questions
12
Question groups
5
Question types
Sample Questions

Acids, Bases and Salts questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q1 Mark
The property which is not shown by acids is:
  • A
    They have sour taste.
  • ✓
    They feel soapy.
  • C
    They turn litmus red.
  • D
    Their pH is less than seven.

Answer: B.

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Q 2M.C.Q1 Mark
The colour of methyl orange indicator in a solution is yellow. The pH of this solution is likely to be:
  • A
    7
  • B
    Less than 7
  • C
    0
  • ✓
    More than 7

Answer: D.

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Q 3M.C.Q1 Mark
The products of chlor$-$alkali process are:
  • A
    $\ce{NaCl, Cl_2}$ and $\ce{H_2}$
  • ✓
    $\ce{H_2, Cl_2}$ and $\ce{NaOH}$
  • C
    $\ce{Cl_2, Na_2CO_3}$ and $\ce{H_2O}$
  • D
    $\ce{NaOH, Cl_2}$ and $\ce{HCl}$

Answer: B.

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Q 4M.C.Q1 Mark
A solution reacts with marble chips to produce a gas which turns lime water milky. The solution contains:
  • A
    $\ce{Na_2SO_4}$
  • B
    $\ce{CaSO_4}$
  • ✓
    $\ce{H_2SO_4}$
  • D
    $\ce{K_2SO_4}$

Answer: C.

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Q 5M.C.Q1 Mark
The salt which will give a neutral solution on dissolving in water will be:
  • A
    $\ce{CH_3COONa}$
  • B
    $\ce{NH_4Cl}$
  • ✓
    $\ce{KCl}$
  • D
    $\ce{Na_2CO_3}$

Answer: C.

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Q 6M.C.Q-[Che-1M]1 Mark
Which of the following types of medicine is used for treating indigestion caused by over-eating?
  1. Antibiotic.
  2. Analgesic.
  3. Antacid.
  4. Antiseptic.
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Q 32[2 Mark Questions]2 Marks
A first-aid manual suggests that vinegar should be used to treat wasp stings and baking soda for bee stings. What does this information tell you about the chemical nature of:
  1. Wasp stings?
  2. Bee stings?
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Q 33[2 Mark Questions]2 Marks
A milkman adds a very small amount of baking soda to fresh milk.
  1. Why does he shift the pH of the fresh milk from 6 to slightly alkaline?
  2. Why does this milk take a long time to set as curd?
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Q 36Answer the questions.[Che-2M]2 Marks
You have been provided with three test-tubes. One of these test-tubes contains distilled water and the other two contain an acidic and a basic solution respectively. If you are given only blue litmus paper, how will you identify the contents of each test-tube?
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Q 41[3 Mark Questions]3 Marks
Write the name and formula of one salt each which contains:
  1. Two molecules of water of crystallisation.
  2. Tive molecules of water of crystallisation.
  3. Ten molecules of water of crystallisation.
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Q 42[3 Mark Questions]3 Marks
A white shirt has a yellow stain of curry. When soap is rubbed on this shirt during washing, the yellow stain turns reddish-brown. On rinsing the shirt with plenty of water, the reddish-brown stain turns yellow again.
  1. Name the natural indicator present in curry stain.
  2. Explain the changes in colour of this indicator which take place during washing and rinsing the shirt.
  3. What is the nature of soap (acidic/ basic) as shown by the indicator present in curry stain?
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Q 43[3 Mark Questions]3 Marks
Here are some results of solutions tested with universal indicator paper:
  1. Sulphuric acid: Red
  2. Metal polish: Dark blue
  3. Washing-up liquid:
  4. Yellow Milk of magnesia:
  5. Light blue Oven cleaner:
  6. Purple Car battery acid: Pink
Arrange the solutions in order of their increasing pH values (starting with the one with the lowest pH).
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Q 44[3 Mark Questions]3 Marks
What happens when an acid reacts with a base? Explain by taking the example of hydrochloric acid and sodium hydroxide. Give equation of the chemical reaction which takes place. What is the special name of such a reaction?
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Q 47Answer the questions.[Che-3M]3 Marks
Write the formulae of sodium chloride and sodium carbonate. Explain why an aqueous solution of sodium chloride is neutral but an aqueous solution of sodium carbonate is basic (or alkaline). Write chemical equations of the reactions involved.
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Q 50Answer the questions.[Che-3M]3 Marks
When a piece of limestone reacts with dilute HCl, a gas X is produced. When gas X is passed through lime water then a white precipitate Y is formed. On passing excess of gas X, the white precipitate dissolves forming a soluble compound Z.
  1. What are X, Y and Z?
  2. Write equations for the reactions which take place:
  1. When limestone reacts with dilute HCl.
  2. When gas X reacts with lime water to form white precipitate Y.
  3. When excess of gas X dissolves white precipitate Y to form a soluble compound Z.
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Q 51[5 marks Questions]5 Marks
Solution A turns universal indicator blue to purple whereas solution B turns universal indicator orange to red.
  1. What will be the action of solution A on litmus?
  2. What will be action of solution B on litmus?
  3. Name any two substances which can give solutions like A.
  4. Name any two substances which can give solutions like B.
  5. What sort of reaction takes place when solution A reacts with solution B?
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Q 52[5 marks Questions]5 Marks
Write the chemical formula of ammonium chloride. Explain why an aqueous solution of ammonium chloride is acidic in nature? Illustrate your answer with the help of a chemical equation.
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Q 53[5 marks Questions]5 Marks
The pH values of five solutions A, B, C, D and E are given below:
  1. 1
  2. 5
  3. 7
  4. 11
  5. 13
Which solution is:
  1. Weakly alkaline.
  2. Neutral.
  3. Strongly acidic.
  4. Strongly alkaline, and.
  5. Weakly acidic?
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