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USHA PUBLICATION-D- AND F_BLOCK ELEMENT & CO-ORDINATION COMPOUND -EXERCISE
- Purest form of iron is called as
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- Iron becomes passive on treatment with
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- Bauxite ore mainly containing silica impurity is purified by
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- The no. of unpaired electrons in Fe^(3+) ion (Z=26) is
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- [Co(NH3)5Br]Cl and [Co(NH3)5Cl]Br are related as-
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- The composition of calamine is .
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- Malachite is the ore of .
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- During extraction of Al from bauxite is added to lower the melting po...
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- In K4[Fe(CN)6] , effective atomic number of iron is .
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- What is slag ?
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- Brass is an alloy of and Zinc.
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- Azurite is the ore of .
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- Copper metal obtained from Bessemer converter is known as .
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- Write the ionic equation showing the oxidising action of K2Cr2O7 with ...
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- Annealing is a process in which
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- All transition metals are d-block element but all d-block elements are...
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- What are the ambidentate ligands ? Give examples.
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- What is difference between calcination and roasting ?
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- Find EAN of Fe in K4[Fe(CN)6]
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- When steam is passed over red hot iron, the products formed are
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