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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
- Which element directly combines with xenon forming compounds?
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- Between F2 and Cl2 which is more reactive?
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- Write one oxyacid of chlorine.
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- In the reaction H2SO4+2HIto2H2O+SO2+I2 H2SO4 acts as ...
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- Arrange the halogen acids in increasing order of their acidic strength...
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- Which halogen will produce O2 and O3 on passing through water ?
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- What is called fourth state of matter ?
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- Arrange the noble gases in increasing order of the case liquification.
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- Name two scientists associated with discovery of noble gasses.
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- What is the bond angle in SO2 molecule ?
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- Why do the Gr-18 elements not form compounds under ordinary conditions...
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- Why has it been difficult to study chemistry of radon ?
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- Acidified K2Cr2O7 solution changes to when SO2 gas is passed through i...
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- What is the shape of ozone molecule ?
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- Name two poisonous gases which can be prepared from Cl2.
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- H2O is a liquid while hydrogen sulphide is a gas at room temperature....
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- Write all the members of halogen family.
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- Which noble gas is used along with O2 for respiration by sea divers ?
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- Which noble gas is called as Hidden gas ?
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- Presence of Helium in earth was Ist proved by .
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