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Q.

The pair of s-block metals, which give crimson colour to the flame is

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a

Li, Mg

b

Na, Ca

c

Li, Sr

d

K, Ca

 

answer is C.

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Detailed Solution

Ignition test of different s-block elements:

                      Colour of Flame                          Inference
Crimson redLithium, Strontium
Golden yellowSodium
VioletPotassium
Brick redCalcium
Apple green/ Yellowish greenBarium

 

 

 

 

 

 

 

 

Hence, option (C) is correct.

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