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प्रश्न
Cement, the important building material is a mixture of oxides of several elements. Besides calcium, iron and sulphur, oxides of elements of which of the group (s) are present in the mixture?
विकल्प
Group 2
Groups 2, 13 and 14
Groups 2 and 13
Groups 2 and 14
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उत्तर
Groups 2, 13 and 14
Explanation:
Cement contains elements of group 2 (Ca), group 13 (Al) and group 14 (Si).
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संबंधित प्रश्न
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BCl3
Explain why the following compounds behave as Lewis acids?
AlCl3
Explain the following:
Boron does not exist as B3+ ion.
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Pb4+ acts as an oxidising agent but Sn2+ acts as a reducing agent.
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Electron gain enthalpy of chlorine is more negative as compared to fluorine.
Match the species given in Column I with properties given in Column II.
| Column I | Column II |
| (i) Diborane | (a) Used as a flux for soldering metals |
| (ii) Galluim | (b) Crystalline form of silica |
| (iii) Borax | (c) Banana bonds |
| (iv) Aluminosilicate | (d) Low melting, high boiling, useful for measuring high temperatures |
| (v) Quartz | (e) Used as catalyst in petrochemical industries |
Match the species given in Column I with the hybridisation given in Column II.
| Column I | Column II |
| (i) Boron in [B(OH)4]– | (a) sp2 |
| (ii) Aluminium in [Al(H2O)6]3+ | (b) sp3 |
| (iii) Boron in B2H6 | (c) sp3d2 |
| (iv) Carbon in Buckminsterfullerene | |
| (v) Silicon in \[\ce{SiO^{4-}4}\] | |
| (vi) Germanium in [GeCl6]2– |
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Ionisation enthalpy
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TlCl3, TlCl
Which one of the following is the correct statement?
