Subject: Bio - Chemistry

#9

Which of the following is a chemical reaction?

A) Boiling water

B) Melting ice

C) Rusting of iron

D) Freezing milk

Answer:   C

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#10

Which of the following is a strong acid?

A) HCl

B) NH3

C) NaOH

D) CH4

Answer:   A

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#11

Which of the following is an example of a homogeneous mixture?

A) Sand and water

B) Oil and water

C) Salt dissolved in water

D) Iron filings and sulfur

Answer:   C

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#12

Which of the following represents a chemical property?

A) Melting point

B) Color

C) Flammability

D) Density

Answer:   C

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#13

Which bond involves sharing of electron pairs between atoms?

A) Ionic bond

B) Covalent bond

C) Metallic bond

D) Hydrogen bond

Answer:   B

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#14

Which is the product of a neutralization reaction?

A) Salt only

B) Acid only

C) Salt and water

D) Water only

Answer:   C

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#15

Which ion is released by acids in aqueous solution?

A) OH?

B) Na?

C) H?

D) Cl?

Answer:   C

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#16

Redox reactions involve which of the following?

A) Only reduction

B) Only oxidation

C) Transfer of protons

D) Transfer of electrons

Answer:   D

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