WorksheetsPECUTAN 2 KIMIA
Total questions: 15
Worksheet time: 8mins
Determine the oxidation number of chromium, Cr in dichromate ion, Cr2O72-
+2
+4
+5
+6
A gas occupies 345 cm3 at STP. Calculate the number of moles of moles of the gas.
14.4
15.4
0.0154
0.154
What is the number of valence electrons for atom with electronic configuration of 1s2 2s2 2p6 3s2 3p3
15
5
3
8
11. Which of the following represent an element that forms ion with a charge of –2?
1s2 2s2 2p6 3s2
1s2 2s2 2p6 3s2 3p2
1s2 2s2 2p6 3s2 3p4
1s2 2s2 2p6 3s2 3p5
Orbital with quantum numbers: n=3, l=2 and m=+2 is
2p
3s
3f
3d
The electronic configuration of copper atom is
1s2 2s2 2p6 3s2 3p6 3d10 4s1
Determine the number of electrons in the copper atom in the ground state with the azimuthal quantum number l=0.
7
9
1
11
Which property is increasing across period 3 from left to right?
Atomic size
Ionisation energy
shielding effect
oxidation no
Lithium and potassium belongs to the same group in Periodic Table. They have the same number of..
proton
valence electron
shells
electrons
Molecular geometry of trigonal planar will have the bond angle of..
109.5
90
180
120
Which molecules has a dipole moment, u not equal to zero?
CCl4
CHCl3
CO2
CF4
The electronic configurations of elements X
and Y are as follows:
X: 1s2 2s2 2p6 3s2 Y: 1s2 2s2 2p5
When X and Y combine, the type of bonding is...
ionic bond
covalent bond
dative covalent bond
double bond
Which one of the following statements regarding a dynamic equilibrium is false?
At equilibrium, no net change occur
At equilibrium, the concentration of reactants and products stays the same
At equilibrium, only products are formed
At equilibrium, the rates of forward and backward reactions are same
N2H4 is a base. What is its conjugate acid?
N2H3-
N2H5+
NH3
N2H4+
An acid with higher value of Ka has ______ acidity
higher
lower
Higher value of pKb will have_____ value of Kb and _____basicity
lower, lower
lower, higher
higher, higher
higher, lower
