- 1(current)
Q. No.| Assertion (A): | When an alkali metal dissolves in liquid NH3 the solution acquires different colors. |
| Reason (R): | Paired electrons are present in ammonia. |
| 1. | (A) is true and (R) is the correct explanation of (A). |
| 2. | (A) is true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyArrange the following ions in increasing order of their mobility in the aqueous solution:
Li+, Na+, K+, Rb+ and Cs+
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe alkali metal that gives hydrated salts is -
1. Li
2. Na
3. K
4. Cs
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe most stable (thermally) carbonate of alkaline earth metal is-
1. MgCO3
2. CaCO3
3. SrCO3
4. BaCO3
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyLi2CO3 decomposes at a lower temperature because -
1. Lithium carbonate is not stable to heat.
2. Lithium carbonate is ionic in nature.
3. Lithium ion is unable to polarise carbonate ion.
4. Electropositive character of lithium is the highest.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAlkali and alkaline earth metals cannot be obtained by chemical reduction method because they are the strongest :
1. Oxidizing agents.
2. Reducing agents.
3. Hydrating agents.
4. Drying agents.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyLiF is almost insoluble in water whereas LiCl is soluble in water and acetone both, because of:
| 1. | Greater covalent character of LiCl as compared to LiF. |
| 2. | Greater hydration energy of LiF as compared to LiCl. |
| 3. | Greater size of LiF as compared to LiCl. |
| 4. | Greater lattice energy of LiF as compared to LiCl. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe correct statement(s) among the following options is/are:
| 1. | BeO is almost insoluble but BeSO4 is soluble in water. |
| 2. | BaO is soluble but BaSO4 is insoluble in water. |
| 3. | LiI is more soluble than KI in ethanol. |
| 4. | All of the above. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
Q. No.
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