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WorksheetsChemistry Quiz for Grade 11 Students
Total questions: 15
Worksheet time: 8mins
What is the Law of Conservation of Mass and how does it apply to chemical reactions?
The Law of Conservation of Mass only applies to physical changes, not chemical reactions.
The Law of Conservation of Mass applies to chemical reactions by ensuring that the total mass of the reactants before a reaction is equal to the total mass of the products after the reaction.
The Law of Conservation of Mass states that the mass of reactants can be greater than the mass of products in a chemical reaction.
The Law of Conservation of Mass allows for the creation of matter in chemical reactions.
How does the atomic number differ from the atomic mass?
Atomic number is the number of electrons, while atomic mass is the number of protons.
Atomic number is the number of neutrons, while atomic mass is the number of protons.
Atomic number is the sum of protons and neutrons, while atomic mass is the number of electrons.
Atomic number is the number of protons, while atomic mass is the sum of protons and neutrons.
What is an exothermic process?
An exothermic process absorbs energy in the form of heat.
An exothermic process is a chemical reaction or phase transition that releases energy in the form of heat.
An exothermic process involves the release of light energy.
An exothermic process is a chemical reaction that occurs at low temperatures.
What is an endothermic process?
An endothermic process decreases in entropy.
An endothermic process is a spontaneous reaction.
An endothermic process absorbs heat from its surroundings.
An endothermic process releases heat to its surroundings.
How does temperature affect the rate of a chemical reaction?
Increasing temperature generally increases the rate of a chemical reaction.
Temperature always decreases the rate of a chemical reaction.
Decreasing temperature generally increases the rate of a chemical reaction.
Temperature has no effect on the rate of a chemical reaction.
What is Gibbs free energy and how is it related to spontaneity of a reaction?
Gibbs free energy is related to the spontaneity of a reaction by determining whether a reaction is spontaneous (ΔG < 0), non-spontaneous (ΔG > 0), or at equilibrium (ΔG = 0).
Gibbs free energy is related to the size of a reaction
Gibbs free energy is related to the speed of a reaction
Gibbs free energy is related to the color of a reaction
In terms of polar character, which of the following order is correct?
NH3 < H2O < HF < H2S
H2S < NH3 < H2O < HF
H2O < NH3 < H2S < HF
HF < H2O < NH3 < H2S
The hybrid state of C atom in C2H2 is same as that of carbon in
C2H6
CO2
BENZENE
C (diamond)
Two hybrid orbitals have a bond angle of 120°. The percentage of s character in the hybrid orbital is nearly
25%
33%
50%
66%
Which of the following pair of molecules will have permanent dipole moment for both members?
NO2 & CO2
NO2 & O3
SiF4 & CO2
SiF4 & NO2
Which one of the following molecules has the smallest bond angle?
NH3
PH3
H2Se
H2S
The nodal plane in the π-bond of ethene is located in
The molar plane
A plane parallel to the molecular plane
A plane perpendicular to the molecular plane which bisects the carbon-carbon sigma bond at right angle
A plane perpendicular to the molecular plane which contains the carbon-carbon σ-bond.
What is the valency of carbon in CO32- ?
2
3
4
-3
Which of the following is an example of super octet molecule ?
ClF3
PCl5
IF7
all of the above
Which of the following is an example of super octet molecule ?
ClF3
PCl5
IF7
all of the above
