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(4) Black lead

The variety of coal in which the deposit contains recognizable traces of the orginal plant material is 1 Anthracite 2 Lignite 3 Peat 4 Bitumen

1 Answers  

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neel armstrong belongs to which country ?

1 Answers  

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The location and energy of an electron in an atom can be specified by 1 Atomic mass 2 Atomic number 3 Quantum numbers 4 None of these

1 Answers  

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The ore of which of the following metals can be concentrated by hydraulic washing? 1 Tin 2 Sodium 3 Iron 4 Manganese

3 Answers  

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The gas that usually causes explosions in coal mines is 1 Hydrogen 2 Carbon monoxide 3 Air 4 Methane

8 Answers   BCECE, UPSC,

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Which of the following fertilizers leaves acidic residue? 1 Urea 2 Ammonium phosphate 3 Ammonium sulphate 4 None of these

1 Answers  

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The difference between a nuclear reactor and an atom bomb is that 1 No chain reaction takes place in nuclear reactor while in the atomic bomb there is a chain reaction 2 No chain reaction takes place in atomic bomb while it takes place in a nuclear reactor 3 The chain reaction in nuclear reactor is controlled 4 None of these

1 Answers  

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Which of the following metals remains in liquid form under normal conditions? 1 Uranium 2 Radium 3 Zinc 4 Mercury

4 Answers  

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abbrivation for ROA in oracle?

1 Answers   ISRO,

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What is the colouring matter in plants called

2 Answers  

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Which variety of glass is heat resistant? 1 Hard glass 2 Flint glass 3 Pyrex glass 4 Bottle glass

2 Answers   PDO,

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Which of the following metals was first discovered by man? 1 Bronze 2 Silver 3 Iron 4 Copper

3 Answers  

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