Question

tungsten filament in an electric bulb glows when heated to nearly _°c.
a)3000. b)1000
c)3400. d)4000
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Answer 1

Answer:

The numbers placed in front of formulas to balance equations are called coefficients, and they multiply all the atoms in a formula. Thus, the symbol “2 NaHCO3” indicates two units of sodium bicarbonate, which contain 2 Na atoms, 2 H atoms, 2 C atoms, and 6 O atoms (2 X 3= 6, the coefficient times the subscript for O)1-nitro butane and 2-methyl 1-nitro propane are Chain isomers(

Compounds having same molecular formula and difference in the nature of carbon chain is called as chain isomers)

CH

3

CH

2

CH

2

CH

2

NO

2

1-nitro butane

CH

3

−CH(CH

3

)−CH

2

−NO

2

2-methyl 1-nitro propane

Hence option A is correct

Explanation:

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