# HSC Chemistry - Important One Mark Questions

Question set 4, with 10 important one mark questions in Chemistry (+2 Chemistry)

1) The hybridization in $SF_{6}$ molecule is:

a) $sp^{3}$
b) $sp^{3}d^{2}$
c) $sp^{3}d$
d) $sp^{3}d^{3}$

2) The bond order in the Oxygen molecule is:

a) 2
b) 2.5
c) 3
d) 1

3) Among the following, which has the highest electro negativity value?

a) F
b) Cl
c) Br
d) I

4) The compound with garlic taste is:

a) $P_{2}O_{3}$
b) $P_{2}O_{5}$
c) $H_{3}OO_{3}$
d) $H_{3}PO_{4}$

5) Copper is extracted from:

a) cuprite
b) copper glance
c) malachite
d) copper pyrites

6) Which one of the following ions produces color?

a) $Sc^{3+}$
b) $Cu^{+}$
c) $Zn^{2+}$
d) $V^{3+}$

7) Maximum oxidation state exhibited by Lanthanides is:

a) +2
b) +1
c) +3
d) +4

8) Which is used in optical lenses?

a) $LaO_{2}$
b) $CeO_{2}$
c) $TiO_{2}$
d) $ZrO_{2}$

9) An example of a chelting ligand is:

a) $NO_{2}$
b) Chloro
c) Bromo
d) en

10) The reaction $_{5}Be^{8}\rightarrow \; _{4}Be^{8}$ takes place due to:

a) $\alpha$ – decay
b) $\beta$ – decay
c) electro capture
d) positron decay