Which one of the following statements is correct?
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.
Subtopic: Biological Importance of S Block Elements and & Its Ore |
From NCERT
NEET - 2023
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Amongst the given option which of the following molecules/ion acts as a Lewis acid?
| 1. | \(\text{OH}^- \) | 2. | \(\text{NH}_3 \) |
| 3. | \(\text H_2 \text O \) | 4. | \(\text{BF}_3 \) |
Subtopic: Acids & Bases - Definitions & Classification |
72%
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NEET - 2023
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Which amongst the following options is correct graphical representation of Boyle's Law?
| 1. |  |
2. |  |
| 3. |  |
4. | - |
Subtopic: Gas Laws |
54%
From NCERT
NEET - 2023
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Match the allotropes of cabon given in List I with the respective characteristics given in List II.
| List-I | List-II | ||
| A. | Coke | I. | Carbon atoms are sp3 hybridised. |
| B. | Diamond | II. | Used as a dry lubricant |
| C. | Fullerene | III. | Used as a reducing agent |
| D. | Graphite | IV. | Cage like molecules |
Choose the correct answer from the options given below:
| Options: | (A) | (B) | (C) | (D) |
| 1. | III | IV | I | II |
| 2. | II | IV | I | III |
| 3. | IV | I | II | III |
| 4. | III | I | IV | II |
Subtopic: Compounds of Carbon, Preparations, Properties & Uses |
73%
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NEET - 2023
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The element expected to form the largest ion to achieve the nearest noble gas configuration is:
1. Na
2. O
3. F
4. N
1. Na
2. O
3. F
4. N
Subtopic: Atomic Size |
53%
From NCERT
NEET - 2023
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Given below are two statements:
In the light of the above statements choose the correct answer from the options given below:
| Statement I: | A unit formed by the attachment of a base to 1' position of sugar is known as a nucleoside. |
| Statement II: | When nucleoside is linked to phosphorous acid at 5' position of sugar moiety we get nucleotide. |
| 1. | Statement I is false but Statement II is true. |
| 2. | Both Statement I and Statement II are true. |
| 3. | Both Statement I and Statement II are false. |
| 4. | Statement I is true but Statement II is false. |
Subtopic: DNA, RNA & Metal Ions |
From NCERT
NEET - 2023
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Which one is an example of heterogeneous catalysis?
| 1. | Combination between dinitrogen and dihydrogen to form ammonia in the presence of finely divided iron. |
| 2. | Oxidation of sulphur dioxide into sulphur trioxide in the presence of oxides of nitrogen. |
| 3. | Hydrolysis of sugar catalysed by H+ ions. |
| 4. | Decomposition of ozone in presence of nitrogen monoxide. |
Subtopic: Catalyst |
54%
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NEET - 2023
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The following compound would be classified as:
| 1. | Vinylic halide | 2. | Benzylic halide |
| 3. | Aryl halide | 4. | Allylic halide |
Subtopic: Introduction and Physical Properties |
67%
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NEET - 2023
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In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with \(\text{Fe}^{3+}\) due to the formation of:
1. \([\mathrm{Fe}(\mathrm{SCN})]^{2+} \)
2. \(\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3 \cdot \mathrm{xH}_2 \mathrm{O} \)
3. \(\mathrm{NaSCN} \)
4. \(\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NOS}\right]^{4-} \)
1. \([\mathrm{Fe}(\mathrm{SCN})]^{2+} \)
2. \(\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3 \cdot \mathrm{xH}_2 \mathrm{O} \)
3. \(\mathrm{NaSCN} \)
4. \(\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NOS}\right]^{4-} \)
Subtopic: Qualitative Analysis of Organic Compounds |
61%
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NEET - 2023
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Subtopic: Polymers: Natural & Synthetic, Biodegradable & Non Biodegradable |
59%
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