Q621
Open questionThe gas produced in marshy places due to decomposition of vegetation is
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Q622
Open questionOrganic compounds are
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Q623
Open questionVinegar is an aqueous solution of
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Q624
Open questionTwo elements which can form a large number of compounds are
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Q625
Open questionAlcoholic (– OH) group can be identified by :
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Q626
Open questionWhich one is the simplest form of alkane?
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Q627
Open questionWhich of the following is not a natural source of hydrocarbon?
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Q628
Open questionThe element with highest first ionisation energy is
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Q629
Open questionIn a period from Li to F, ionisation potential
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Q630
Open questionIn the periodic table of elements, on moving from left to right across a period, the atomic radius
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Q631
Open questionThe most reactive among the halogens is
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Q632
Open questionWhich one element has the lowest electronegativity value
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Q633
Open questionWhich one element has the highest electronegativity value
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Q634
Open questionThe element with highest ionization potential is
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Q635
Open questionWhich of the following has no unit?
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Q636
Open questionWhich among the following is not a characteristic of transition metals?
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Q637
Open questionThe most electronegative element among the following is
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Q638
Open questionTotal number of halogen elements found in the periodic table is
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Q639
Open questionIonisation energy of nitrogen is greater than that of oxygen because nitrogen has
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Q640
Open questionThe elements with atomic numbers 9, 17, 35, 53, 85 are all
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