Quartz crystals normally used in quartz clocks etc. is chemically 1 Sodium silicate 2 Germanium oxide 3 Silicon dioxide 4 None of these

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wheather lightning will attack a aeroplane during flying if not why

2 Answers   TCS,

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When was the administration control of terls enstrusted to physcial research laboratory, ahmedabad?

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Which of the following characteristics is not-shown by hydrogen? 1 It burns in air to form water 2 It supports combustion 3 It combines with almost all the metals forming hydrides 4 None of these

1 Answers  

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Which of the following metals react with nitrogen at room temperature to form nitride? 1 Sodium 2 Potassium 3 Magnesium 4 None of these

3 Answers  

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What is the morphology ?

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In fireworks, the green flame is produced because of 1 Mercury 2 Sodium 3 Potassium 4 Barium

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Why Colours is Important in Our Daily Life???

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What are the divisions of food according to the functions it performs ? Describe them

1 Answers  

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what is defination of conductivity? How much conductivity of water ? what is effect when conductity of water low or high?

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what is the force that helping the earth to revolve by its own.

2 Answers  

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Why is food necessary for human body ?

2 Answers  

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