Class 10 Quiz Level 3 (Difficult) – Chemical reactions and equations

Total questions: 10

Calculate the amount of $ \displaystyle C{{O}_{2}}$ produced when 22g of $ \displaystyle {{C}_{2}}{{H}_{6}}$ (ethane) is burned in excess oxygen (molar mass of $ \displaystyle {{C}_{2} }{{H}_{6}}$ = 30 g/mol, $ \displaystyle C{{O}_{2}}$= 44 g/mol):

Topic: Stoichiometry

Deselect Answer

64 g

88 g

123 g

176 g

None

Predict the product of the reaction : $ \displaystyle N{{a}_{2}}S{{O}_{4}}+BaC{{l}_{2}}$ ?

Topic: Predicting Products Of Reactions

Deselect Answer

$ \displaystyle NaCl+BaS{{O}_{4}}$

$ \displaystyle N{{a}_{2}}Cl+BaS{{O}_{4}}$

$ \displaystyle NaS{{O}_{4}}+BaC{{l}_{2}}$

$ \displaystyle NaC{{l}_{2}}+BaS{{O}_{4}}$

None

Balance the following chemical equation $ \displaystyle {{C}_{4}}{{H}_{{10}}}+{{O}_{2}}\to C{{O}_{2}}\to {{H}_{2}}O$ what are the coefficients for $ \displaystyle {{C}_{4}}{{H}_{{10}}}$ and $ \displaystyle {{O}_{2}}$ ?

Topic: Balancing Complex Chemical Equation

Deselect Answer

1 and 6, 5

2 and 13

1 and 9

2 and 7

None

Which of the following best describes the transition state of a reaction?

Topic: Reaction Mechanisms

Deselect Answer

It is a stable intermediate

It is a high-energy and unstable state

It is the final product of the reaction

It is the starting reactant

None

Which factor does not affect the rate of a chemical reaction ?

Topic: Reaction Kinetics

Deselect Answer

Temperature

Pressure

Surface area of reactants

Color of reactants

None

Calculate the amount of $ \displaystyle {{H}_{2}}$ when 2 g of $ \displaystyle Mg$ reacts with excess $ \displaystyle HCl$. (Molar mass of $ \displaystyle Mg=24g/\text{mol},{{H}_{2}}=2g/mol)$

Topic: Stoichiometry

Deselect Answer

0.5 g

0.16 g

2 g

4 g

None

For the reaction $ \displaystyle 2S{{O}_{2}}+{{O}_{2}}\to 2S{{O}_{3}},$if the enthalpy change $ \displaystyle (\Delta H)$ is -197.8kJ, what can be inferred about the reaction?

Topic: Thermodynamics of Reactions

Deselect Answer

It is endothermic

It is exothermic

It is at equilibrium

It requires a catalyst

None

Identify the type of reaction for the following equation: $ \displaystyle 2KCl{{O}_{3}}\to 2KCl+3{{O}_{2}}.$

Topic: Identifying Types Of Reactions

Deselect Answer

Combination

Decomposition

Combustion

Double displacement

None

Which statement is true about catalysts?

Topic: Catalysts

Deselect Answer

They increases the activation energy of a reaction

They are consumed in the reaction

They change the position of equilibrium

They provide an alternative pathway for the reaction

None

10.

Which of the following will decrease the rate of a reaction?

Topic: Reaction rates

Deselect Answer

Increasing the concentration of reactants

Increasing the particle size of reactants

Increasing the temperature

Adding a catalyst

None

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Class 10 Quiz Level 3 (Difficult) – Chemical reactions and equations

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