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Q. No.| Assertion (A): | Metallic sodium dissolves in liquid ammonia giving a deep blue solution, which is paramagnetic. |
| Reason (R): | The deep blue solution is due to the formation of amide. |
| 1. | (A) is false but (R) is true. |
| 2. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are true and R is NOT the correct explanation of (A). |
| 4. | (A) is true but (R) is false. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| 1. | Mg plays role in neuromuscular function and interneuronal transmission. |
| 2. | The daily requirement of Mg and Ca in the human body is estimated to be 0.2-0.3 g. |
| 3. | All enzymes that utilize ATP in phosphate transfer require Ca as the cofactor. |
| 4. | The bone in the human body is an inert and unchanging substance. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| Assertion (A): | Lithium and beryllium unlike their other respective group members form compounds with pronounced ionic character |
| Reason (R): | Lithium and Magnesium have similar properties due to a diagonal relationship |
| 1. | (A)is true but (R) is false |
| 2. | (A) is false but (R) is true |
| 3. | Both (A) and (R) are true and (R) is the correct explanation of (A) |
| 4. | Both (A) and (R) are true but (R) is not the correct explanation of (A) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| I: | Hydrated chlorides and bromides of Ca, Sr and Ba on heating undergo hydrolysis. |
| II: | Hydrated chlorides and bromides of Be and Mg on heating dehydration. |
In the light of the above statements, choose the correct answer from the options given below:
1. Statement-I is correct but Statement-II is false.
2. Statement-I is incorrect but Statement-II is true.
3. Both Statement-I and Statement-II are true.
4. Both Statement-I and Statement-II are false.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| List-I | List-II | ||
| (a) | Li | (i) | absorbent for carbon dioxide |
| (b) | Na | (ii) | electrochemical cells |
| (c) | KOH | (iii) | coolant in fast breeder reactors |
| (d) | Cs | (iv) | photoelectric cell |
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iii) | (i) | (iv) |
| 2. | (iv) | (i) | (iii) | (ii) |
| 3. | (iii) | (iv) | (ii) | (i) |
| 4. | (i) | (iii) | (iv) | (ii) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyLiF is sparingly soluble in water because it has:
1. partial covalent character.
2. small electronegativity.
3. high lattice enthalpy.
4. low hydration enthalpy.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAlkali metals, though white, impart characteristic color to the flame because of
| 1. | excitation and coming back of valence electrons to the original level. |
| 2. | oxidation of metal in the presence of flame. |
| 3. | excitation of valence electrons. |
| 4. | gain of electrons. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. gypsum
2. Portland cement
3. bleaching powder
4. lime water
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAmong the following alkaline earth metal halides, the one which is covalent and soluble in organic solvents is:
1. Magnesium chloride
2. Beryllium chloride
3. Calcium chloride
4. Strontium chloride
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe structures of beryllium chloride in solid-state, and vapor state are :
1. Dimer, and Linear, respectively.
2. Chain in both.
3. Chain, and dimer, respectively.
4. Linear in both.
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