Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R): 
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.
In the light of the above statements choose the correct answer from the options given below:
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.
Subtopic:  Reasoning Questions |
From NCERT
NEET - 2023
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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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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). 
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
In the light of the above statements, choose the most appropriate answer from the options given below:
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)
Subtopic:  Preparations, Properties & Uses of S Block Elements |
 53%
From NCERT
NEET - 2023
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Given below are two statements: 
 
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.
Subtopic:  Preparations, Properties & Uses of S Block Elements |
From NCERT
NEET - 2023
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Match List-I with List-II.
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
Choose the correct answer from the options given below:
(a) (b) (c) (d)
1. (ii) (iii) (i) (iv)
2. (iv) (i) (iii) (ii)
3. (iii) (iv) (ii) (i)
4. (i) (iii) (iv) (ii)
Subtopic:  Preparations, Properties & Uses of S Block Elements |
 79%
From NCERT
NEET - 2022
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LiF is sparingly soluble in water because it has:

1. partial covalent character.
2. small electronegativity.
3. high lattice enthalpy.
4. low hydration enthalpy.

Subtopic:  Reasoning Questions |
 68%
From NCERT
NEET - 2022
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Alkali 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.


 

Subtopic:  Physical Properties |
 73%
From NCERT
NEET - 2022
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CaCl2 and Ca(OCI)2 are components of:
1.  gypsum
2.  Portland cement
3.  bleaching powder
4.  lime water
Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
 78%
From NCERT
NEET - 2022
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Among 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

Subtopic:  Chemical Properties |
 76%
From NCERT
NEET - 2021
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The 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.

Subtopic:  Reasoning Questions |
 68%
From NCERT
NEET - 2021
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