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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
- Which noble gas is used in radiotherapy ?
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- Among the halogens which has highest bond dissociation energy ?
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- Why is Helium monoatomic ?
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- Between HI and HCl which is stronger acid?
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- Why can't Cl2 bleach dry flowers ?
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- Which noble gas is most soluble in water ?
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- Which noble gas is called as stranger gas?
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- Iodine is more soluble in KI than in water,why?
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- 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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