An atom of the element A has 3 electrons in its outermost shell while another atom X has 6 electrons in its outermost shell. The formula of the compound between A and X could be :
1. A2X3
2. AX3
3. A3X2
4. A2X
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In the electronic structure of acetic acid there are
1. 16 shared and 8 unshared electrons
2. 8 shared and 16 unshared electrons
3. 12 shared and 12 unshared electrons
4. 18 shared and 6 unshared electrons
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Among the following isostructural compounds, which one has highest lattice energy ?
1. LiCl
2. MgO
3. NaCl
4. LiF
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NH3 and BF3 form adduct readily because they form
1. Ionic bond
2. Covalent bond
3. Co-ordinate bond
4. Hydrogen bond
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A bonded molecule MX3 is T-shaped. The number of non-bonding pairs of electrons is:
1. 0
2. 2
3. 1
4. Can be predicted only if atomic number of M is known
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The hybrid state of S in SO3 is similar to that of
1. C in C2H2
2. C in C2H4
3. C in CH4
4. C in CO
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In a chemical change from PCl3 PCl5 the hybrid state of P changes from :
1. sp2 to sp3
2. sp3 to sp2
3. sp3 to sp3d
4. sp3 to dsp
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The shape of covalent molecule AX3 is:
| 1. | Triangular |
| 2. | T-shape |
| 3. | Pyramidal |
| 4. | Any of the above three depending upon the number of lone pairs present in A. |
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If the central atom in certain molecule has two lone pairs and three bond pairs, the shape of the molecule could be:
| 1. | T-shaped | 2. | Trigonal planar |
| 3. | Trigonal bipyramidal | 4. | Distorted tetrahedral |
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