IMPORTANT QUESTIONS

1. Q141 The electronic configuration of an element is 2, 7. To which group does this element belong :

   • (a) 7
   • (b) 9
   • (c) 2
   • (d) 17

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2. Q142 Electrical appliances are earthed to :

   • (a) avoid shock
   • (b) avoid overloading
   • (c) avoid wastage
   • (d) avoid short-circuiting

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3. Q143 In domestic electric circuits, the fuse must be placed in :

   • (a) earth wire
   • (b) live wire
   • (c) neutral wire
   • (d) any of the three wires

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4. Q144 The basic nature of sodium hydroxide is due to the presence of which one of the following ions in the solution.

   • (a) hydrogen ions.
   • (b) sodium ions
   • (c) hydroxide ions
   • (d) none of these

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5. Q145 The focal length of a mirror is the distance between the____ and the____of the mirror.

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6. Q146 Syngamy is:

   • (a) the fusion of male and female gamete to form zygote.
   • (b) production of male gametes.
   • (c) production of female gametes
   • (d) none of these.

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7. Q147 Distinguish between spinal nerve and cranial nerve.

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8. Q148 Which of the following has sweet fruity smell:

   • (a) Alcohol
   • (b) Esters
   • (c) Carboxylic acid
   • (d) None of these

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9. Q149 The aldehydic group is :

   • (a) > CO
   • (b) -OH
   • (c)-COOH
   • (d) -CHO

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10. Q150 The metal which is liquid at room temperature:

    • (a) Mercury
    • (b) Cesium
    • (c) Bromine
    • (d) Gallium

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