Multiple Choice QuestionsOxidation number of nitrogen in which among the oxides of nitrogen is the lowest?
Nitric oxide
Nitrous oxide
Nitrogen dioxide
Nitrogen trioxide
Silicon oil is obtained from the hydrolysis and polymerisation of
trimetylchlorosilane and dimethyldichlorosilane
trimethylchlorosilane and methyldichlorosilane
methyltrichlorosilane and dimethyldichlorosilane
triethylchlorosilane and dimethyldichlorosilane
Which one of the following correctly represents the variation of electronegatrvity (EN) with atomic number (Z) of group 13 elements?
Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that, graphite
is a non-crystalline substance
is an allotropic form of diamond
has molecules of variable molecular masses like polymers
has carbon atoms arranged in large plates of rings of strongly bound carbon atoms with weak interplate bonds
C60 an allotrope of carbon contains:
18 hexagons and 14 pentagons
20 hexagons and 12 pentagons
12 hexagons and 20 pentagons
16 hexagons and 16 pentagons
The reaction of zinc with dilute and concentrated nitric acid, respectively, produces:
NO2 and NO
NO and N2O
NO2 and N2O
NO2 and N2O
Assertion : Nitrogen and Oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen.
Reason : The reaction between nitrogen and oxygen requires high temperature.
Both assertion and reason are correct, but the reason is not the correct explanation for the assertion
Both the assertion and reason are incorrect but the reason is not the correct explanation for the assertion.
The assertion is incorrect, but the reason is correct
The assertion is incorrect, but the reason is correct
Among the following oxoacids, the correct decreasing order of acid strength is
HOCl > HClO2>HClO3 > HClO4
HClO4>HOCl> HClO2>HClO3
HClO4>HClO3>HClO2>HOCl
HClO4>HClO3>HClO2>HOCl
