Chemistry - Complete s-block Question with Solution | TestHub

ChemistryComplete s-blocks-block IIAMedium2 minQB

ChemistryMediummultiple choice

Which of the following option is/are CORRECT?

Answer:

B, C, D

Solution:

$2 Li + O_{2} \to Li_{2} O$ (oxide)

$2 Na + O_{2} \to Na_{2} O_{2}$ (peroxide)

$M + O_{2} \to KO_{2}$ (superoxide)

( $M = K, Rb, Cs$ )

(b) Be, Mg do not flame test due to high IE.

(d) MgO is used because of its very high melting point.

Stream:JEESubject:ChemistryTopic:Complete s-blockSubtopic:s-block IIA

⏱ 2mℹ️ Source: QB

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