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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
- The most abundant noble gas present in the atmosphere is .
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- The main source of Helium in earth is .
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- Why can't SO2 be collected over water?
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- How is the presence of SO2 detected?
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- Arrange the oxoacids of chlorine In Increasing order of their acidic s...
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- Between O2 and O3 which is paramagnetic ?
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- Oxygen gas can be absorbed by .
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- Which group elements are called as chalcogens.
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- What is the reason for the syrupy nature of conc. H2SO4 ?
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- Write the allotropic forms of sulphur.
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- Which allotropic form of sulphur is more stable at room temperature ?
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- Write the allotropic forms of oxygen .
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- Ozone is prepared by passing silent electric discharge through
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- What does H2SO4 behave when it reacts with formic acid?
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- The bleaching action of Cl2 is due to its property .
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- The maximum covalency of chlorine is .
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- Why is a compound of oxygen and florine is called as oxygen difluoride...
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- Name the substance used for drying of SO2 gas.
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- Name the hydride of Gr-VI elements which is liquid at room temperature...
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- Between HBr and HI which is more easily oxidised?
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