A) diamond is the hardest, lamp black is the softest |
B) diamond is the hardest, coke is the softest |
C) coke is the hardest, graphite is the softest |
D) diamond is the hardest, graphite is the softest |
D) diamond is the hardest, graphite is the softest |
1). Which of the following is the correct sequence of the following elements in increasing order of their relative densities? 1. Mercury 2. Gold 3. Lead 4. Aluminium
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2). Which one of the following is the basis of modern periodic table?
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3). The purest form of iron is :
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4). When an iron nail gets rusted, iron oxide is formed :
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5). Liquefied Petroleum Gas consists of mainly :
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6). The metal that is present in photo films is :
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7). The main constituents of pearls are :
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8). An element that does not occur in nature but can be produced artificially is :
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9). Which of the following pairs is not correctly matched? Mineral Industrial use
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10). The element found on the surface of the moon is :
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