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UNITED BOOK HOUSE-HIGHER SECONDARY EXAMINATION 2019-EXERCISE
- Which of the halogen hydracids forms bi-salts ? Write reasons.
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- Which type of isomerism is shown by the two complexes: [Co(NH3)5SO4] B...
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- Write the name of monomer units of Dacron and mention one use of it.
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- Which type of stoichimetric defects is shown by Ag Br crystal?
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- Chromium (atomic-mass=52) metal has body-entred cubic structure. The r...
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- What do you mean by packing fraction of cubic unit cell?
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- Calculate packing fraction of face-centred cubic unit cell.
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- What is the vapour pressure of purewater at 100^@C temperature?
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- 12 g of a solid solute is dissolved in 90 gm pure water. Vapour pressu...
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- Write cell reaction and calculate electrical work obtained from the fo...
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- Write composition of copper matte.
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- Write balanced equations for the reactions involved in the extraction ...
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- Which type of ores is concentrated by froth floatation process?
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- What is thermit mixture? Mentain one use of it.
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- Which of the following are coloured in aqueous solution? Give rea-sons...
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- Which of the following oxides are amphoteric? Mn2O7,CrO3,CrO3,V2O5
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- Explain why most of the Cu (1) compounds are unstable in aqueous solut...
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- What happens when MnO(4)^(2-) ion is kept in acid medium? Write bal-an...
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- Write R/S configuration of
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- Write structural formula of A for the following reaction:
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