Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of 1 Nitrates 2 Zeolites 3 Sulphontes 4 None of these

2 Answers  

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Which of the following are the ingredients of gun metal? 1 Iron, Tin 2 Copper, Tin 3 Iron, Brass, Tin 4 Iron, Zinc, Titanium

2 Answers  

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What is one light year?

0 Answers  

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Why is food necessary for human body ?

2 Answers  

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The inert gas which is substituted for nitrogen in the air, used by deep sea divers for breathing, is 1 Helium 2 Argon 3 Krypton 4 Xenon

3 Answers   Argon,

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Which of the following reagents gives a silver mirror test when added to aldehydes? 1 Fehling’s solution 2 Tollen’s Reagent 3 Ebaeyer’s Reagent 4 Nessler’s Reagent

1 Answers  

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Which of the following is commonly called a ‘polyamide’? 1 Rayon 2 Orlon 3 Terylene 4 Nylon

3 Answers   SSC,

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When and where was the first experimental atomic explosion took place?

0 Answers  

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What is the speed of arihant?

0 Answers  

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where the 3rd earthsummit held

3 Answers   Infosys,

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why is it important that sex cells have half the number of Chromosomes as body cells?

0 Answers  

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Which of the following substances undergoes chemical change on heating? 1 Sodium chloride 2 Silica 3 Lead nitrate 4 Platinum wire

2 Answers  

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