NEW
Font size
WorksheetsPRE-UPS 1
Total questions: 17
Worksheet time: 17mins
Which of these particles has the same number of electrons as 17Cl-?
18Ar
16S+2
14Si-2
16S
Which of the following Hydrogen atom series of spectrum is NOT in infrared region in electromagnetic region?
Balmer
Brackett
Pfund
Paschen
Calculate the energy of electron at n=6.
(RH=2.18x10-18J)
6.06 x 10-20 J
3.63 x 10-20 J
-6.06 x 10-20 J
-3.63 x 10-20 J
Transition of electron from an excited state to a ground state of n=5 formed a photon. Which of the following series belongs to this respective transition?
Balmer
Pfund
Paschen
Brackett
A line is formed in the hydrogen emission spectrum when electron _________ the energy and fall back to a _________energy level.
absorbed, lower
emitted, lower
absorbed, higher
emitted, higher
Which of these DOES NOT represent the molecular formula of CH2?
C2H4
C4H8
C2H6
C5H10
The combustion of glucose, C6H12O6 produces water and carbon dioxide. Identify the stoichiometry of the reaction from the chemical equation below.
__C6H12O6 (s) + __O2(g) ----> __CO2 (g) + __H2O (l)
1, 3, 3, 6
1, 2, 3, 6
1, 6, 3, 6
1, 6, 6, 6
Which of this statement is the definition of limiting reactant?
The substance that is completely consumed when the chemical reaction is complete.
The substance that is partially consumed when the chemical reaction is complete.
The substance that is formed when a chemical reaction is complete.
The substance that is used in excess in a chemical reaction.
Which of these values represent the relative atomic mass of copper?
63.546 a.m.u
63.546
63.546 gmol-1
63.546 gmL-1
What are the properties of wave stated by de Broglie
i) Position
ii) Momentum
iii) Frequency
iv) Wavelength
i and ii
ii and iii
iii and iv
ii and iv
What is the definition of Aufbau’s principle?
The electron is filled singly first before it is paired.
The electron in an orbital must be paired in opposite spin.
The electron is filled in the orbital in the order of ascending energy level.
The electron is moving in a fixed path around the nucleus.
The electronic configuration of 12Mg is 1s2 2s2 2p6 3s2. What is the shape of the orbital for the electron at 3s orbital?
Spherical shape
Dumb bell shape
Clover leaf shape
Donut shape
The magnetic quantum number, m is representing the ________ of the orbital.
shape
orientation
size
energy level
What is the electronic configuration of 24Cr atom?
1s2 2s2 2p6 3s2 3p6 4s2 3d4
1s2 2s2 2p6 3s2 3p6 4s1 3d5
1s2 2s2 2p6 3s2 3p6 4s2 4d4
1s2 2s2 2p6 3s2 3p6 3d6
What is the electronic configuration of 13Al3+?
[Z for Al = 13]
1s2 2s2 2p6
1s2 2s2 2p6 3s2 3p1
1s2 2s2 2p6 3s2 3p4
1s2 2s2 2p6 3s1 3p5
Which of these set of quantum numbers is allowed?
n=2, l=1, m=2, s= +1/2
n=2, l=0, m=0, s= -1/2
n=3, l=3, m=2, s=+1/2
n=3, l=-2, m=-1, s=-1/2
One mole of nitrogen gas, N2 _______.
[relative atomic mass of N: 14]
has 6.023x1023 molecules of nitrogen gas.
has 6.023x1023 atoms of nitrogen.
can occupies 22.4 dm3mol-1 at room temperature.
has the mass of 14g.
