Diamond is harder than graphite because of 1 Difference of layers of atoms 2 Tetrahedral structure of diamond 3 Difference of crystalline structures 4 None of these

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Arihant was commissioned on which day?

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Which of the following is not a bleaching agent? 1 Sulphur dioxide 2 Carbon dioxide 3 Sodium hypochlorite 4 Chlorine

1 Answers  

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Ozone attacks 1 Mercury and silver 2 Copper 3 Silver and iron 4 None of these

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‘Saponification involves the hydrolysis of fats and oils by 1 Water 2 Washing soda 3 Stearic acid 4 Caustic soda

1 Answers  

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first aid to person affected with electrical shock

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Which are the important pulsating nebulae?

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Which of the following is used in making smoke bombs? 1 Sulphur 2 phosphorus 3 Hydrogen 4 Carbon

1 Answers  

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The chemical (ethyl merceptan) added to the otherwise odorless LPG cooking gas for imparting a detectable smell to the gas is a compound of 1 Sulphur 2 Fluorine 3 Chlorine 4 Bromine

2 Answers  

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The metal that is present in photo films is 1 Mercury 2 Platimnum 3 Magnesium 4 Silver

3 Answers  

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Chemical change does not take place in case of 1 Souring of milk into curd 2 Rusting of iron in atmosphere 3 Burning of magnesium ribbon in air 4 emitting of light by a red hot platinum wire

3 Answers   Banking, Eastern Railway,

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A moderator is used in nuclear reactors in order to 1 Increase the number of neutrons 2 Decrease the number of neutrons 3 Slow down the speed of neutrons 4 Accelerate the neutrons

1 Answers  

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