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NEET UG CHEMISTRY MCQ: S-BLOCK ELEMENTS

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Understanding +4 | -1
Nitrogen dioxide cannot be prepared by heating
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Correct option: A
KNO3\mathrm{KN}{\mathrm{O}_3}
Option A is correct because KNO3KNO_3 on heating decomposes to KNO2KNO_2 and O2O_2, not NO2NO_2. The other nitrates decompose to give NO2NO_2.

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Which of the following exists in polymeric form? If 5 moles of BaCl2\mathrm{BaCl}_{2} is mixed with 2 moles of Na3PO4\mathrm{Na}_{3} \mathrm{PO}_{4}, the maximum number of moles of Ba3(PO4)2\mathrm{Ba}_{3}\left(\mathrm{PO}_{4}\right)_{2} formed is ________ (Nearest integer) Alkali metal superoxides are obtained by the reaction of Pearl ash and caustic potash are chemically: When sodium chloride solution is electrolysed, the gas that is liberated at the cathode is What is product of reaction :

Ba(OH)2(dilute)+H2O2+ClO2⟶\underset {\text{(dilute)}}{Ba(OH)_2}+H_2O_2+ClO_2 \longrightarrow
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