SK015 Pre-UPS II #2
Authored by Byron Kadum
Chemistry
12th Grade - University
Used 216+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The succesive ionisation energies of an element are given as: 760 (first), 1540, 3300, 4399, 8950, and 11900 kJ/mol. From these data alone, it can be inferred that the element...
...is a p-block element
...is a d-block element
...is an s-block element
...has half-filled p orbitals
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The number of electrons in the 3d orbitals of the element with a proton number of 26 is...
6
5
4
3
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Which of the following pairs of ions have the same electronic configuration? (Proton numbers: Mn=25; Fe=26; Co=27)
Fe3+ and Mn2+
Fe2+ and Mn2+
Fe2+ and Co2+
Mn2+ and Co2+
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The boiling point of butanone (CH3CH2COCH3) is higher than that of pentane (CH3CH2CH2CH2CH3) because...
...butanone is polar but pentane is non-polar.
...butanone forms intermolecular hydrogen bonds but pentane does not.
...the covalent bonds in butanone are stronger than the covalent bonds in pentane.
...the dipole-dipole attractions in butanone are stronger than in pentane.
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Which of the following contains a set of substances with different chemical bonds?
Aluminium chloride, sodium chloride, mercury
Magnesium, lead, brass
Ethanol, water, ammonia
Nickel (II) chloride, barium nitrate, sodium hydroxide
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The electronegativities of some atoms are given: H=2.1; C=2.5; Cl=3.0; O=3.5; F=4.0. Which of the following bonds are the most polar?
C-F
O-F
Cl-H
F-F
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The boiling points of water and ammonia are 373 K and 240 K respectively. The boiling point of water is higher than that of ammonia because...
...the hydrogen bonds between water molecules are stronger than the hydrogen bonds between ammonia molecules.
...oxygen is more electronegative than nitrogen.
...the O-H bond in H2O is stronger than the N-H bond in NH3.
...a water molecule has a larger size than an ammonia molecule.
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