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Q. No.Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A):
Noble gases exhibit very low chemical reactivity.
Reason (R):
Noble gases have completely filled orbitals in the valence shell and are very stable.
In light of the above statements choose the correct answer from the options given below:
1.
Both (A) and (R) are true and (R) is the correct explanation of (A).
2.
Both (A) and (R) are 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.
Subtopic: Nature of Compound |
97%
From NCERT
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| Assertion (A): | The physical and chemical properties of the elements are periodic functions of their atomic numbers. |
| Reason (R): | Periodicity based on the atomic number was illustrated by Mendeleev's periodic law. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are 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. |
Subtopic: Modern Periodic Table & Periodicity |
68%
From NCERT
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The element with highest negative electron gain enthalpy will belong to:
1. Period 2, group 18
2. Period 2, group 17
3. Period 3, group 17
4. Period 2, group 1
1. Period 2, group 18
2. Period 2, group 17
3. Period 3, group 17
4. Period 2, group 1
Subtopic: Electron Affinity (EA) |
66%
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The correct sequence given below contains neutral, acidic, basic, and amphoteric oxide each, respectively is:
| 1. | NO, ZnO, CO2, CaO | 2. | ZnO, NO, CaO, CO2 |
| 3. | NO, CO2, ZnO, CaO | 4. | NO, CO2, CaO, ZnO |
Subtopic: Nature of Compound |
78%
From NCERT
NEET - 2023
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NEET 2025 - Target Batch
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Which of the following pair is correctly matched?
1. Basic oxides - \(\mathrm{In_2O_3 , K_2O , SnO_2}\)
2. Neutral oxides - \(\mathrm{CO, NO_2, N_2O}\)
3. Acidic oxides - \(\mathrm{Mn_2O_7, SO_2, TeO_3}\)
4. Amphoteric oxides -\(\mathrm{BeO , Ga_2O_3 , GeO }\)
1. Basic oxides - \(\mathrm{In_2O_3 , K_2O , SnO_2}\)
2. Neutral oxides - \(\mathrm{CO, NO_2, N_2O}\)
3. Acidic oxides - \(\mathrm{Mn_2O_7, SO_2, TeO_3}\)
4. Amphoteric oxides -\(\mathrm{BeO , Ga_2O_3 , GeO }\)
Subtopic: Nature of Compound |
From NCERT
NEET - 2023
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
The increasing order of metallic character is shown by:
1. Be > Ca > K
2. K > Ca > Be
3. Ca > K > Be
4. K > Be > Ca
1. Be > Ca > K
2. K > Ca > Be
3. Ca > K > Be
4. K > Be > Ca
Subtopic: Nature of Compound |
79%
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The element expected to form the largest ion to achieve the nearest noble gas configuration is:
| 1. | Sodium(Na) | 2. | Oxygen(O) |
| 3. | Fluorine(F) | 4. | Nitrogen(N) |
Subtopic: Atomic Size |
56%
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NEET - 2023
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
What is the correct order of electron gain enthalpy from least negative to most negative for the elements C, Ca, Al, F, and O?
1. Al < Ca < O < C < F
2. Al < O < C < Ca < F
3. C < F < O < Al < Ca
4. Ca < Al < C < O < F
1. Al < Ca < O < C < F
2. Al < O < C < Ca < F
3. C < F < O < Al < Ca
4. Ca < Al < C < O < F
Subtopic: Electron Affinity (EA) |
83%
From NCERT
NEET - 2013
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NEET 2025 - Target Batch
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Which of the given pairs shows the first element having higher electronegativity than the second?
| 1. | Al and B | 2. | Be and Li |
| 3. | Cl and O | 4. | Si and N |
Subtopic: Electronegativity |
67%
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| Statement I: | The electronegativity of any given element is not constant. |
| Statement II: | Electronegativity varies depending on the element to which it is bound. |
In light of the above statements, choose the correct answer from the options given below.
| 1. | Statement l is incorrect but Statement ll is correct. |
| 2. | Both Statements l and ll are correct. |
| 3. | Both Statements l and ll are incorrect. |
| 4. | Statement l is correct but Statement ll is incorrect. |
Subtopic: Electronegativity |
62%
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