1 |
Sodium - potassium alloy is used in nuclear reactor as a:<br> |
- A. catalyst <br>
- B. coolant <br>
- C. reactant <br>
- D. absorber<br>
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2 |
Which one of the following is the lightest metal?<br> |
- A. Calcium<br>
- B. Magnesium<br>
- C. Lithium <br>
- D. Sodium<br>
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3 |
All metals are solid except |
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4 |
The earth is made up of ____________ % of aluminum. |
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5 |
Metals lose their electrons easily because:<br> |
- A. They are electronegative<br>
- B. They have electron affinity<br>
- C. They are electropositive<br>
- D. Good conductors of heat<br>
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6 |
The colour of calcium metal flame is |
- A. Golden yellow
- B. Brilliant white
- C. Brick red
- D. Light green
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7 |
All are noble metals except: |
- A. Silver
- B. Gold
- C. Hydrogen
- D. Platinum
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8 |
Metal can form ions carrying charges:<br> |
- A. Uni-positive<br>
- B. Di-positive<br>
- C. Tri-Positive <br>
- D. All of them<br>
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9 |
Which one of the following is brittle?<br> |
- A. Sodium<br>
- B. Aluminum <br>
- C. Selenium<br>
- D. Magnesium <br>
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10 |
The core of the earth is mostly made from ____________ |
- A. Nickel
- B. Iron
- C. A % B
- D. Copper
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