Form 4 & 5 Chemistry: Free Trial*

G. 10 & 11

Chemistry

F. 4 & 5

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G. 10 & 11 / F. 4 & 5

Chemistry: Free Trial*

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1 / 10

1. The Haber process is a reversible reaction. If the reaction were at equilibrium, hydrogen, and nitrogen would be produced as quickly as ammonia gas was being broken down. How is the forward reaction rate increased?

A. By increasing the pressure

B. By removing ammonia from the reaction vessel

C. By removing nitrogen and hydrogen from the reaction vessel

D. By increasing the amount of hydrogen and nitrogen in the reaction vessel

2 / 10

2. The protons of an atom are found...

A. in lines radiating out from the nucleus

B. in orbit around the outside of the nucleus

C. dotted throughout the atom

D. in the nucleus of the atom

3 / 10

3. What happens to electrons in covalent bonding?

A. They are removed from the atoms' shell

B. They are added to both atoms' shells

C. They pass from one atom to another

D. They are shared by the atoms

4 / 10

4. How many electrons are involved in a covalent bond?

A. As many as are free

B. 4

C. 1

D. 2

5 / 10

5. When ammonium nitrate is added to water, an endothermic reaction occurs and...

A. heat is given out

B. nothing changes

C. the temperature rises

D. the temperature of the reaction mixture falls

6 / 10

6. I dissolve 10g of NaOH in 100 $cm^{3}$ of water. Which is the correct concentration in both $gdm^{-3}$ and $moldm^{-3}$?

A. 100 $gdm^{-3}$; 0.4 $moldm^{-3}$

B. 1 $gdm^{-3}$; 4 $moldm^{-3}$

C. 1 $gdm^{-3}$; 0.025 $moldm^{-3}$

D. 100 $gdm^{-3}$; 2.5 $moldm^{-3}$

7 / 10

7. Pick the correct combination of definitions.

A. Acid - proton giver \\ Alkali - proton donor

B. Acid - proton acceptor \\ Alkali - proton donor

C. Acid - proton donor \\ Alkali - proton acceptor

D. Acid - proton acceptor \\ Alkali - proton acceptor

8 / 10

8. Graphite is a substance made of carbon atoms only, as is diamond. However, the two substances are very different. Why?

A. The atoms in diamond are arranged in layers and the atoms in graphite are arranged in a giant covalent structure

B. The atoms in diamond are arranged in a giant covalent lattice and the atoms in graphite are arranged in layers

C. The atoms in diamond are arranged in a giant covalent structure and the atoms in graphite are arranged at random

D. The atoms in diamond are arranged at random and the atoms in graphite are arranged in layers

9 / 10

9. What does malleable mean?

A. Is easily shattered

B. Can be stretched into wires

C. Can be bent or hammered into shape

D. Is shiny

10 / 10

10. How many ionic bonds are formed when sodium bonds with chlorine?

A. 2

B. 3

C. 1

D. 4

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