Download Which element is present in all organic compounds

Which element is present in all organic compounds?
1.
2.
3.
4.
carbon
nitrogen
oxygen
phosphorous
Which property is generally characteristic of all organic compounds?
1. low melting point
2. high melting point
3. soluble in polar solvents
4. insoluble in nonpolar solvents
Which compounds are isomers?
1.
1-propanol and 2-propanol
2.
methanoic acid and ethanoic acid
3.
methanol and methanal
4.
ethane and ethanol
What is the name of the compound that has the molecular formula C6H6?
1.
butane
2.
butene
3.
benzene
4.
butyne
In a molecule of CH4, the hydrogen atoms are spatially oriented toward the centers of a
regular
1.
pyramid
2.
tetrahedron
3.
square
4.
rectangle
In which pair of hydrocarbons does both in the compound contain only one double bond
per molecule?
1.
C2H2 and C2H6
2.
C2H2 and C3H6
3.
C4H8 and C2H4
4.
C6H6 andC7H8
The reaction CH2CH2 + H2 ---> CH3CH3 is an example of
1.
substitution
2.
addition
3.
esterification
4.
fermentation
Which compound is a saturated hydrocarbon?
1.
ethane
2.
ethene
3.
ethyne
4.
ethanol
What type of reaction is CH3CH3 + Cl2 -> CH3CH2Cl + HCl?
1.
an addition reaction
2.
a substitution reaction
3.
a saponification reaction
4.
an esterification reaction
.
Which class of organic compounds can be represented as R -- COOH?
1.
carboxylic acids
2.
alcohols
3.
esters
4.
aldehydes and ketones
What substance is made up of monomers joined together in long chains?
1.
ketone
2.
plastic
3.
ester
4.
acid
During fractional distillation, hydrocarbons are separated according to their
1.
boiling points
2.
melting points
3.
triple points
4.
saturation points
Which compound is an ester?
1.
CH3OH
2.
CH3OCH3
3.
CH3COOH
4.
CH3COOCH3