WorksheetsChemistry Small Quiz before sem exam
Total questions: 15
Worksheet time: 9mins
Which is not the way for the atoms of group 16 elements become stable?
by gaining two electrons
by losing two electrons
by sharing two electrons
by sharing four electrons
Elements in the same group of Periodic Table have the same......
physical properties
number of valence electrons
number of electrons
electron configuration
The electron-dot structure of the element nitrogen is shown in the figure below. In which group of the periodic table does nitrogen exist?
Group 1
Group 3
Group 5
Group 15
Which of the following ions is the largest?
O2-
F-
N3-
Li+
Which is not the factors affecting ionisation energy
spin-pair repulsion
Shielding effect
Atomic size
electronegativity
Boron has lower ionisation energy than Beryllium due to
Spin-pair repulsion
electron removed is further away from nucleus
Greater nuclear charge
larger shielding effect
Which statement is correct?
Cℓ has a relative isotopic mass of 35.5
Cℓ2 has a relative molecular mass of 70.
ICℓ has a relative molecular mass of 162.4.
NaCℓ has a relative molecular mass of 58.5.
NH3 is polar molecules due to different electronegativity between N and H.
TRUE
FALSE
Possible bond angle of F-S-F in SF4.
120o
90o
115o
125o
At high pressure, most of the gases behave non-ideal. Why?
significant intermolecular forces
insignificant intermolecular forces
high volume at high pressure
low volume at high pressure
MgO can conduct electricity in molten state due to free-moving ions.
TRUE
FALSE
Which method / data cannot be used to find the enthalpy change of reaction below:
CH3CH2OH + 3O2 --> 2CO2 + 3H2O
Calorimetry
enthalpy change of formation CH3CH2OH, CO2 and H2O
Bond energy of reactants and products
enthalpy of reactants and products
A is oxidising agent as oxidisation number decreased
TRUE
FALSE
Explain how the temperature affects rate of reaction
Particles move faster
more particles have energy greater than activation energy
Frequency of collision increases
More effective collision
