| 1. | Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg) ? | |
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HNO3
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HCl
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H2SO4
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All of these
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Report Question| 2. | Which one of the following four metals would be displaced from the solution of its salts by other three metals ? | |
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Cu
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Zn
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Mg
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Ag
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| 3. | 2 ML each of concentrated HCl, HNO3 and a mixture of concentrated HCl and concentrated HNO3 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be ? | |
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Ag
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Cu
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Au
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Al
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| 4. | The electronic configurations of three elements X, Y and Z are X —2, 8; Y — 2, 8, 7 and Z — 2, 8, 2. Which of the following is correct ? | |
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Z is a non-metal
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X is a metal
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Y is a non-metal and Z is a metal
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Y is a metal
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| 5. | Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z ? | |
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Occurs as solid
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Conducts electricity in molten state
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Has high melting point
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Has low melting point
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| 6. | Which of the following are not ionic compounds (i) KCl (ii) HCl (iii) CCl4 (iv) NaCl ? | |
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(i) and (iii)
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(iii) and (iv)
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(ii) and (iii)
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(i) and (ii)
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| 7. | Which of the following is a solid at STP ? | |
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bromine
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fluorine
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iodine
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chlorine
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| 8. | Ordinary glass is a mixture of ? | |
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sodium silicate and silica
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sodium silicate, calcium silicate and silica
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sodium silicate, calcium silicate
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none of the above
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| 9. | The most reactive metal of the following is ? | |
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magnesium
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sodium
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zinc
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iron
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| 10. | Metalloids share the properties of ? | |
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Non-metals
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Metals
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Both
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None of these
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