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Deepak Rock
@deepak-rock
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Joined: Aug 6, 2021
Last seen: Sep 10, 2021
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Topics: 1742 / Replies: 303
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Topic
When a solution is added to a cloth strip treated with onion extract, then the smell of onion cannot be detected. State whether the given solution contains an acid or a base.
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 108
Topic
Name an indicator which is pink in alkaline solution but turns colourless in acidic solution.
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 62
Topic
Name an indicator which is red in acid solution but turns blue in basic solution.
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 81
Topic
What colours do the following indicators turn when added to an acid (such as hydrochloric acid)? (a) litmus (b) methyl orange
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 114
Topic
What colour do the following indicators turn when added to a base or alkali (such as sodium hydroxide)? (a) methyl orange (b) litmus (c) red cabbage extract
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 117
Topic
Give two important uses of washing soda and baking soda.
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 74
Topic
What is neutralisation reaction? Give two examples.
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 280
Topic
Why should Plaster of Paris be stored in a moisture-proof container?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 376
Topic
A milkman adds a very small amount of baking soda to fresh milk. (a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline? (b) Why does milk take a long time to set as curd?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 332
Topic
Fresh milk has a pH of 6. How do you think the pH will change as it turns into curd? Explain your answer.
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 93
Topic
Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCl) is added to test tube A while acetic acid (CH3COOH) is added to test tube B. In which case, fizzing occurs more vigorously and why?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 304
Topic
Five solutions A, B, C, D and E when tested with universal indicator show pH as 4, 1, 11, 7 and 9, respectively. Which solution is:
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 344
Topic
Why does an acid not show any acidic behaviour in the absence of water?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 172
Topic
Why does distilled water not conduct electricity whereas rain water does?
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 85
Topic
Compounds such as alcohol and glucose also contain hydrogen but are not characterised as acids. Describe an activity to prove it.
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 112
Topic
Write the word equation and the balanced equations for the reactions when: (a) dilute sulphuric acid reacts with zinc granules. (b) dilute hydrochloric acid reacts with magnesium ribbon.
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 163
Topic
Which of the following types of medicines is used for treating indigestion? (a) Antibiotic (b) Analgesic (c) Antacid (d) Antiseptic
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 69
Topic
10 mL of solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralise will be
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 76
Topic
A solution reacts with crushed eggshells to give a gas that turns lime-water milky. The solution contains
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 194
Topic
A solution turns red litmus blue. Its pH is likely to be (a) 2 (b) 4 (c) 7 (d) 10
4 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 63
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