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What is the coordination number of sodium in Na2O?
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The Ca2+ and F– are located in CaF2 crystal, respectively at face centered cubic lattice points and in ____________.
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If AgI crystallises in zinc blende structure with I– ions at lattice points. What fraction of tetrahedral voids is occupied by Ag+ ions?
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Which set of following characteristics for ZnS crystal is correct?
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Percentages of free space in cubic close packed structure and in the body-centered packed structure are respectively:
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In which of the following crystals alternate tetrahedral voids are occupied?
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The number of octahedral voids present in a lattice is A. The number of closed packed articles, the number of tetrahedral voids generated is B the number of closed packed particles:
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In the hexagonal close-packed structure of a metallic lattice, the number of nearest neighbours of a metallic atom is ____________.
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If Germanium crystallises in the same way as diamond, then which of the following statement is not correct?
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In the cubic close packing, the unit cell has ______.
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In which of the following arrangements octahedral voids are formed?
(i) hcp
(ii) bcc
(iii) simple cubic
(iv) fcc
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At equilibrium the rate of dissolution of a solid solute in a volatile liquid solvent is ______.
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An aqueous solution of hydrochloric acid:
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Which of the following is optically inactive?
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Which of the following is an example of SN2 reaction?
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Which of the following pairs is/are correctly matched?
| Reaction | Product | |
| I | RX + AgCN | RNC |
| II | RX + KCN | RCN |
| III | RX + KNO2 | \[\begin{array}{cc} \phantom{.......}\ce{O}\\ \phantom{.....}/\\ \ce{R - N}\phantom{....}\\ \phantom{.....}\backslash\backslash\\ \phantom{.......}\ce{O} \end{array}\] |
| IV | RX + AgNO2 | \[\ce{R-O-N=O}\] |
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Which of the following is a primary halide?
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Halogenation of alkanes is ____________.
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Which of the following reactions is an example of nucleophilic substitution reaction?
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Which one is most reactive towards SN1 reaction?
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