Subject: Bio - Chemistry

#49

Which is an example of endothermic reaction?

A) Burning of coal

B) Boiling of water

C) Condensation

D) Freezing

Answer:   B

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#50

Which chemical equation is balanced?

A) H2 + O2 ? H2O

B) 2H2 + O2 ? 2H2O

C) H2 + O ? H2O

D) H + O2 ? H2O

Answer:   B

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#51

Which of the following is an example of a saturated hydrocarbon?

A) Methane

B) Ethene

C) Ethyne

D) Benzene

Answer:   A

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#52

What is the main element present in all organic compounds?

A) Hydrogen

B) Carbon

C) Oxygen

D) Nitrogen

Answer:   B

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#53

Which functional group is present in alcohols?

A) -OH

B) -COOH

C) -CHO

D) -NH2

Answer:   A

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#54

Which of the following is a disaccharide?

A) Glucose

B) Fructose

C) Sucrose

D) Galactose

Answer:   C

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#55

What is the general formula for alkanes?

A) CnH2n

B) CnH2n+2

C) CnH2n-2

D) CnHn

Answer:   B

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#56

Which compound contains a carbon-carbon double bond?

A) Ethane

B) Ethene

C) Ethyne

D) Propane

Answer:   B

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