alleryStart learning →Acids turn blue litmus paper:
- colourless
- red
- blue
- green
Show answer and solution
Correct answer: B. red
Acids turn blue litmus red.
Uttarakhand Board Class 10 Acids, Bases and Salts — practice questions
Explore 26 free Acids, Bases and Salts questions in Uttarakhand Board Class 10 Science. Open each question or exercise to read its content, reference answers and available explanation.
Practise Acids, Bases and Salts with Quill →Acids, Bases and Salts questions and exercises with answers
Showing questions 1–26 of 26.
Acids turn blue litmus paper:Read the answer and worked solution →Bases turn red litmus paper:Read the answer and worked solution →Litmus, extracted from lichens, is an example of a:Read the answer and worked solution →Acids characteristically taste:Read the answer and worked solution →Which of the following is a synthetic indicator used to test acids and bases?Read the answer and worked solution →The reaction between an acid and a base, producing salt and water, is called:Read the answer and worked solution →On the pH scale, a neutral solution (such as pure water) has a pH of:Read the answer and worked solution →A solution with a pH less than 7 is:Read the answer and worked solution →A solution with a pH greater than 7 is:Read the answer and worked solution →Acids produce which ion when dissolved in water?Read the answer and worked solution →Bases produce which ion when dissolved in water?Read the answer and worked solution →Baking soda, often used to relieve acidity, is chemically:Read the answer and worked solution →A curry stain turns reddish-brown on a soap-washed cloth and yellow again on rinsing because soap is:Read the answer and worked solution →Blue litmus paper dipped in lemon juice turns:Read the answer and worked solution →Phenolphthalein in a sodium hydroxide solution is:Read the answer and worked solution →Onion juice loses its smell in a:Read the answer and worked solution →When dilute hydrochloric acid is poured on zinc granules, which gas is evolved?Read the answer and worked solution →The gas evolved when an acid reacts with a carbonate turns lime water:Read the answer and worked solution →Neutralisation of an acid by a base produces:Read the answer and worked solution →CuO + 2 HCl → CuCl₂ + H₂O shows that a metallic oxide behaves like a:Read the answer and worked solution →A solution turns red litmus blue and has pH = 11. The solution is:Read the answer and worked solution →Which ion concentration *increases* when an acid dissolves in water?Read the answer and worked solution →Hydrochloric acid and acetic acid of the same concentration are compared. Which is the stronger acid?Read the answer and worked solution →Plaster of Paris is chemically:Read the answer and worked solution →Baking soda (NaHCO₃) is used in antacid tablets mainly because it:Read the answer and worked solution →Farmers add slaked lime, Ca(OH)₂, to soil that is too:Read the answer and worked solution →
Worked practice questions
Bases turn red litmus paper:
- colourless
- yellow
- red
- blue
Show answer and solution
Correct answer: D. blue
Bases turn red litmus blue.
Litmus, extracted from lichens, is an example of a:
- neutral salt
- strong acid
- natural indicator
- synthetic indicator
Show answer and solution
Correct answer: C. natural indicator
Litmus is a natural indicator (from lichens); turmeric is another.
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