| 1. | Which among the following is not a base ? | |
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NH4OH
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C2H5OH
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NaOH
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KOH
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Report Question| 2. | Which of the following statements is true for acids ? | |
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Sour and change blue litmus to red
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Bitter and change red litmus to blue
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Bitter and change blue litmus to red
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Sour and change red litmus to blue
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| 3. | Which of the following salts does not contain water of crystallisation ? | |
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Gypsum
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Washing soda
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Blue vitriol
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Baking soda
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| 4. | Which of the following is(are) true when HCl (g) is passed through water (i) It does not ionise in the solution as it is a covalent compound. (ii) It ionises in the solution. (iii) It gives both hydrogen and hydroxyl ion in the solution. (iv) It forms hydronium ion in the solution due to the combination of hydrogen ion with water molecule. ? | |
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(iii) and (iv)
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(ii) and (iv)
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(iii) only
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(i) only
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| 5. | What happens when a solution of an acid is mixed with a solution of a base in a test tube (i) The temperature of the solution increases (ii) The temperature of the solution decreases (iii) The temperature of the solution remains the same (iv) Salt formation takes place ? | |
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(ii) and (iii)
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(i) and (iii)
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(i) and (iv)
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(i) only
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| 6. | What happens when a solution of an acid is mixed with a solution of a base in a test tube (i) The temperature of the solution increases (ii) The temperature of the solution decreases (iii) The temperature of the solution remains the same (iv) Salt formation takes place ? | |
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(ii) and (iii)
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(i) and (iii)
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(i) and (iv)
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(i) only
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| 7. | Sodium carbonate is a basic salt because it is a salt of ? | |
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weak acid and strong base.
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strong acid and weak base.
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weak acid and weak base.
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strong acid and strong base.
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| 8. | Which of the following is used for dissolution of gold ? | |
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Nitric acid
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Aqua regia
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Sulphuric acid
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Hydrochloric acid
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| 9. | Which of the following are present in a dilute aqueous solution of hydrochloric acid ? | |
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unionised HCl
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Cl– + OH–
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H3O+ + Cl–
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H3O+ + OH–
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| 10. | Which of the following statement is not correct ? | |
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Some non-metal oxides react with water to form an acid.
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Some metals react with acids to give salt and hydrogen.
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All metal carbonates react with acid to give salt, water and carbon dioxide.
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All metal oxides react with water to give salt and acid.
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