Category: etea Chemistry

No.	Topics.	No.	Topics.
1.	ALCOHOLS AND PHENOLS	2.	ALDEHYDES & KETONES
3.	ALKYL HALIDES	4.	ATONTIC STRUCTURE
5.	CARBOXYLIC ACIDS	6.	CHEMICAL BONDING
7.	CHEMISTRY OF HYDROCARBONS	8.	CHETVI ICAL EQUI LIBIRIUM
9.	ELECTROCHEVIISTRY	10.	FUNDAMENTAL CONCEPTS OF CHEMISTRY
11.	FUNDAMENTAL PRICIPLES OF ORGANIC CHEMISTRY	12.	GASES
13.	INDUSTRIAL CHEMISTRY	14.	Limiting and Excess Reactants
15.	LIQUIDS	16.	Macro Mulecule
17.	Moles and Avogadro’s Numbers	18.	REACTION KINETICS
19.	S AND P BLOCK ELEMNETS	20.	SOLIDS
21.	THERMOCHEMISTRY & ENERGETICS OF CHEMICAL REACTIONS	22.	TRANSITION ELEMENTS
23.	Yield

The excess reactant determines the:

Amount of product formed
Amount of reactant left over
Rate of the reaction
Activation energy

Limiting and Excess Reactants

For the reaction C + O₂ → CO₂, if 1 mole of C is mixed with 0.5 moles of O₂, the limiting reactant is:

C
O₂
CO₂
No limiting reactant

Limiting and Excess Reactants

A reactant is in excess if there is more of it than is required to react with the:

Product
Catalyst
Solvent
Limiting reactant

Limiting and Excess Reactants

In the reaction A + 2B → C, if 3 moles of A react with 5 moles of B, the limiting reactant is:

A
B
C
Neither

Limiting and Excess Reactants

The efficiency of a reaction is often expressed as the:

Mole ratio
Percent yield
Limiting reactant
Rate constant

Limiting and Excess Reactants

The amount of product obtained in a laboratory experiment is called the:

Theoretical yield
Stoichiometric yield
Actual yield
Limiting yield

Limiting and Excess Reactants

The concept of a limiting reactant applies to:

All chemical reactions
Only reactions in the gas phase
Only reactions that go to completion
Only reversible reactions

Limiting and Excess Reactants

For the reaction 2Mg + O₂ → 2MgO, if equal masses of Mg and O₂ are used, the limiting reactant will be:

Mg (Molar mass ≈ 24 g/mol)
O₂ (Molar mass ≈ 32 g/mol)
MgO
Both will be consumed

Limiting and Excess Reactants

If reactants A and B are mixed in the exact mole ratio given by the balanced equation, then:

A is limiting
B is limiting
Both are limiting
There is no limiting reactant

Limiting and Excess Reactants

Knowing the limiting reactant is essential for predicting the:

Rate of the reaction
Color of the product
Maximum yield of the product
Temperature change

Limiting and Excess Reactants

In the reaction CH₄ + 2O₂ → CO₂ + 2H₂O, if 1 mole of CH₄ reacts with 1 mole of O₂, the limiting reactant is:

CH₄
O₂
CO₂
H₂O

Limiting and Excess Reactants

The presence of a limiting reactant implies that the reactants were not mixed in a ______ ratio.

1:01
random
liquid
stoichiometric

Limiting and Excess Reactants

The reactant that is not completely used up in a chemical reaction is the:

Inhibitor
Excess reagent
Limiting reagent
Solute

Limiting and Excess Reactants

If a reaction between A and B is complete, and some of A is left over, then B must be the:

Catalyst
Product
Limiting reactant
Excess reactant

Limiting and Excess Reactants

For the reaction 2Na + Cl₂ → 2NaCl, if you start with 2 moles of Na and 2 moles of Cl₂, the limiting reactant is:

Na
Cl₂
NaCl
Neither

Limiting and Excess Reactants

The maximum amount of product that can be formed in a reaction is the:

Actual yield
Percent yield
Theoretical yield
Experimental yield

Limiting and Excess Reactants

In the reaction N₂ + 3H₂ → 2NH₃, if you have 1 mole of N₂ and 4 moles of H₂, the excess reactant is:

N₂
H₂
NH₃
There is no excess reactant

Limiting and Excess Reactants

The reactant that produces the least amount of product is known as the:

Major reactant
Minor reactant
Excess reactant
Limiting reactant

Limiting and Excess Reactants

The amount of excess reactant remaining after a reaction is called the:

Theoretical yield
Actual yield
Leftover reagent
Product

Limiting and Excess Reactants

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