Select the correct option based on statements below:
Assertion (A): H2O is the only hydride of the chalcogen family that is liquid.
Reason (R): The acidic nature of hydrides of the chalcogen family increases down the group.
  
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:  Group 16 - Preparation, Properties & Uses |
 79%
From NCERT
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Select the correct option based on statements below:
Assertion (A): PF5 and IF3 have similar shapes.
Reason (R): All the bond lengths are equal in PF5.
   
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:  Group 15 - Preparation, Properties & Uses |
 65%
From NCERT
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Select the correct option based on statements below:
Assertion (A): The atomic size of F is smaller than that of Cl.
Reason (R): F-F bond is stronger than the Cl-Cl bond.
  
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. (A) is false but (R) is true.
Subtopic:  Group 17 - Preparation, Properties & Uses |
 65%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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Links
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Select the correct option based on statements below:
Assertion (A): Noble gases have the highest ionization energies in their respective periods.
Reason (R): The outermost sub-shell of noble gases in which the electron enters is completely filled.
    
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:  Group 18 - Preparation, Properties & Uses |
From NCERT
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Select the correct option based on statements below:
Assertion (A): The valency and oxidation number of sulphur in S8 respectively are 2 and 0.
Reason (R): S8 Rhombic is the most stable allotropic form of sulphur.
  
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:  Group 16 - Preparation, Properties & Uses |
 70%
From NCERT
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Select the correct option based on statements below:
Assertion (A): SF6 cannot be hydrolysed but SF4 can be.
Reason (R): Six F-atoms in SF6 prevent the attack of H2O on sulphur atom of SF6
 
  
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. (A) is false but (R) is true.
Subtopic:  Group 16 - Preparation, Properties & Uses |
 84%
From NCERT
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Select the correct option based on statements below:
Assertion (A): NaCl reacts with concentrated H2SO4 to give colourless fumes with a pungent smell. But on adding MnO2, the fumes become greenish-yellow
Reason (R): MnO2 oxidizes HCl to chlorine gas which is greenish-yellow.
  
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. (A) is false but (R) is true.
 
Subtopic:  Group 17 - Preparation, Properties & Uses |
 85%
From NCERT
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Select the correct option based on statements below:
Assertion (A): Both rhombic and monoclinic sulphur exist as S8 but oxygen exists as O2.
Reason (R): Oxygen forms  pπ   -   pπ multiple bonds due to its small size and small bond length but  pπ   -   pπ bonding is not possible in sulphur.
    
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:  Group 16 - Preparation, Properties & Uses |
 71%
From NCERT
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Select the correct option based on statements below:
Assertion (A): HI cannot be prepared by the reaction of KI with concentrated H2SO4.
Reason (R): HI has the lowest H—X bond strength among halogen acids.
  
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. (A) is false but (R) is true.
 

Subtopic:  Group 17 - Preparation, Properties & Uses | Group 16 - Preparation, Properties & Uses |
 51%
From NCERT
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Given below are two statements: 

Assertion (A): HNO3 makes iron passive.
Reason (R): HNO3 forms a protective layer of ferric nitrate on the surface of the iron.

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. (A) is false but (R) is true.

Subtopic:  Group 15 - Preparation, Properties & Uses |
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh