Aldehydes Ketones And Carboxylic Acids — Chemistry

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Question 1
EasyJEE

Not a Lewis base:

A. BF3\mathrm{BF_{3}}
B. NH3\mathrm{NH_{3}}
C. H2O\mathrm{H_{2}O}
D. Cl−\mathrm{Cl^{-}}
Question 2
EasyJEE

Element showing variable valency:

A. Fe\mathrm{Fe}
B. Na\mathrm{Na}
C. Mg\mathrm{Mg}
D. Al\mathrm{Al}
Question 3
EasyJEE

Number of valenceelectronsinhalogenvalence electrons in halogen is:

A. 7
B. 1
C. 2
D. 5

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