Question

Read the given statements and select the statement that is correct Assertion-- PHOSPHOROUS burns in air at room temperature Reason- It is an example of SPONTANEOUS COMBUSTION. *

1.None of the above is an appropriate option.

2.Assertion is true but the reason is not the exact explanation of the assertion.

3.Both reason and assertion are false.

4.Both assertion and reason are true and reason is the correct explanation of the assertion
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Answer 1

Answer:

इसका अणुसूत्र H2O है। जल की संरचना में दो हाइड्रोजन परमाणु आक्सीजन परमाणु से सहसंयोजक बन्ध (Covalent Bond) द्वारा जुड़े रहते हैं। जल का अणुभार 18 है। शुद्ध जल रंगहीन, गन्धहीन हेाता है।