Please select a subject first
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An element ‘A’ on exposure to moist air turns reddish-brown and a new compound ‘B’ is formed. The substance ‘A’ and ‘B’ are:
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Which of the following scientists observed that cathode rays consist of negatively charged particles?
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Crookes Rays are also called ______.
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Cathode rays are made up of material particles that have mass and ______.
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Match the following
| 1. | Crooke’s tube | a. | Negatively charged particles |
| 2. | Cathode rays | b. | Cathode ray tube |
| 3. | Proton | c. | Positively charged particles |
| 4. | Anode rays | d. | 1.6 x 10-24 g |
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What is electrical discharge?
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Name the subatomic particles of an atom.
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Explain the properties of Cathode rays.
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Water was first prepared by ______.
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When did Henry Cavendish discover Water?
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Bases are chemical substances that are corrosive and ______ in taste.
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Water-soluble bases are called ______.
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Sodium carbonate is commercially called ______.
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Match the following:
| 1. | Wasp sting | a. | Milk of magnesia |
| 2. | Common salt | b. | Acetic acid |
| 3. | Organic acid | c. | Sodium chloride |
| 4. | Antacid | d. | Vinegar |
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Match the following:
| 1. | Sulphuric acid | a. | Weak base |
| 2. | Sodium hydroxide | b. | Strong acid |
| 3. | Acetic acid | c. | Strong base |
| 4. | Ammonium hydroxide | d. | Weak acid |
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All bases are alkalis but all alkalis are not bases.
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Name the base which is present in a window cleaner.
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What is the role of toothpaste in the prevention of tooth decay?
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Which of the following is referred to as wood gas?
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______ is a mixture of methane and carbon dioxide.
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