Use the MDCAT Question Bank to study by subject and try each question yourself. Click Show Answer to check the correct choice, then take a practice test when you’re ready.
Chemistry · Question 771
What is the substance called that binds to an enzyme at its active site and is converted into product?
Co-factor
Iso-zyme
Active site
Substrate
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Correct answer: D
Substrate
The correct choice is Substrate.
Chemistry · Question 772
Energy for the endothermic reaction is given a value?
Positive
Negative
0
Neither positive nor negative
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Correct answer: A
Positive
The correct choice is Positive.
Chemistry · Question 773
Which type of alkyl halide most readily undergoes an SN2 reaction?
Secondary
Primary
Tertiary
All of these
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Correct answer: B
Primary
The correct choice is Primary.
Chemistry · Question 774
An increase in which factor generally increases polarizability?
Atomicradius
Ionization energy
Ionic radius
Hydration energy
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Correct answer: A
Atomicradius
The correct choice is Atomicradius.
Chemistry · Question 775
Which carboxylic acid listed is most soluble in water?
Ethanoic acid
Pentanoic acid
Hexanoic acid
Butanoic acid
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Correct answer: A
Ethanoic acid
The correct choice is Ethanoic acid.
Chemistry · Question 776
A very small value of the equilibrium constant Kc indicates:
No Reaction
Backward Reaction
LittleForward Reaction
CompleteReaction
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Correct answer: C
LittleForward Reaction
The correct choice is LittleForward Reaction.
Chemistry · Question 777
Which listed heterocyclic compound is not a benzene derivative?
Pyrrole
Furan
Thiophene
All of these
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Correct answer: D
All of these
The correct choice is All of these.
Chemistry · Question 778
A graph of concentration against time for a reaction generally gives a:
Straight line
parabola
Curve
Scattered graph
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Correct answer: C
Curve
The correct choice is Curve.
Chemistry · Question 779
How many hydrogen atoms are present in 18 g of water?
6.022 × 10²³
3 × 6.022 × 10²³
2 × 6.022 × 10²³
4 × 6.022 × 10²³
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Correct answer: C
2 × 6.022 × 10²³
The correct choice is 2 × 6.022 × 10²³.
Chemistry · Question 780
Which elimination and substitution mechanisms commonly compete with each other?