Subject: Bio - Chemistry

#1

What is chemistry primarily concerned with?

A) Study of stars

B) Study of living organisms

C) Study of matter and its changes

D) Study of economic systems

Answer:   C

---

#2

Which of the following is a compound?

A) Oxygen

B) Water

C) Hydrogen

D) Iron

Answer:   B

---

#3

Which state of matter has a definite shape and volume?

A) Solid

B) Liquid

C) Gas

D) Plasma

Answer:   A

---

#4

What is a mixture?

A) A pure substance

B) A substance with uniform composition

C) A physical combination of two or more substances

D) A chemical compound

Answer:   C

---

#5

Which of the following is an example of a physical change?

A) Burning of paper

B) Rusting of iron

C) Melting of ice

D) Cooking of food

Answer:   C

---

#6

What is the smallest unit of an element?

A) Atom

B) Molecule

C) Electron

D) Ion

Answer:   A

---

#7

Which particle has a negative charge?

A) Proton

B) Neutron

C) Electron

D) Nucleus

Answer:   C

---

#8

What is the chemical formula for water?

A) H2

B) H2O

C) O2

D) HO

Answer:   B

---

Page 1 of 30