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USHA PUBLICATION-P-BLOCK ELEMENTS( GR-15,GR16,GR17,GR18)-EXERCISE
- 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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- What happens when MnO2 is heated with hydrochloric acid ?
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- Why is OF6 not known?
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- Explain that bleaching action of CL2 is permanent, while that of SO2 i...
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- Which gas is produced when NaCl is heated with conc. H2SO4 ?
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- Arrange the halogens in increasing order of their electron affinity.
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