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Master High Yield GRE Chemistry Questions: Comprehensive Guide with Detailed Explanations

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Conquering the GRE Chemistry section requires strategic preparation and a deep understanding of high yield topics. This comprehensive guide arms you with a curated collection of such questions, meticulously explained by subject matter experts. Prepare to tackle the GRE with confidence and achieve the score you deserve!

Sterling Test Prep GRE Chemistry Practice Questions: High Yield GRE Chemistry Questions with Detailed Explanations

by Sterling Test Prep

4.3 out of 5

Language	:	English
File size	:	22534 KB
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Print length	:	590 pages

High Yield Topics for GRE Chemistry

Atomic Structure and Properties
Chemical Bonding
Chemical Reactions
Equilibrium
Thermodynamics
Kinetics
Organic Chemistry
Inorganic Chemistry

High Yield GRE Chemistry Questions and Detailed Explanations

Question 1

Which of the following compounds has the highest electronegativity?

LiF
NaCl
KCl
RbCl

Electronegativity increases as you move from left to right across a period and from bottom to top within a group. Among the given compounds, fluorine (F) is the most electronegative element. Therefore, LiF has the highest electronegativity.

Question 2

What is the hybridization of the carbon atom in the following molecule: CH₂=CH₂?

sp
sp²
sp³
sp³d

The carbon atom in CH₂=CH₂ is bonded to two other carbon atoms through double bonds. Each double bond consists of a sigma bond and a pi bond. The carbon atom also has two hydrogen atoms attached to it. Therefore, the carbon atom has a total of three sigma bonds and two pi bonds. This corresponds to the sp² hybridization.

Question 3

What is the product of the following reaction: CH₃CH₂OH + HBr → ?

CH₃CH₂Br
CH₃CH₂O
CH₃CH₂Br + H₂O
CH₃CH₂O + H₂

This is a nucleophilic substitution reaction, where the hydroxide ion (OH^-) from CH₃CH₂OH attacks the electrophilic carbon atom of HBr. The product is CH₃CH₂Br, formed by the displacement of the bromide ion (Br^-) by the hydroxide ion.

Question 4

Which of the following solutions has the highest pH?

[H⁺] = 1 x 10^-7 M
[H⁺] = 1 x 10^-8 M
[H⁺] = 1 x 10^-9 M
[H⁺] = 1 x 10^-10 M

pH is a measure of the acidity or alkalinity of a solution. It is calculated as the negative logarithm of the hydrogen ion concentration: pH = -log[H⁺]. Therefore, the solution with the lowest hydrogen ion concentration will have the highest pH. In this case, [H⁺] = 1 x 10^-7 M has the lowest hydrogen ion concentration and therefore the highest pH.

Question 5

What is the rate law for the following reaction: 2NO + 2H₂ → N₂ + 2H₂O?

Rate = k[NO][H₂]
Rate = k[NO][H₂]²
Rate = k[NO]²[H₂]
Rate = k[NO]²[H₂]²

The rate law for a reaction is determined experimentally. The rate law for this reaction is found to be Rate = k[NO][H₂]². This means that the rate of the reaction is directly proportional to the square of the hydrogen concentration and directly proportional to the concentration of nitric oxide.

These high yield GRE Chemistry questions and detailed explanations provide a solid foundation for your preparation. By thoroughly understanding these concepts, you will significantly enhance your chances of excelling in the Chemistry section of the GRE. Remember to practice regularly, review the explanations carefully, and identify your areas of improvement. With determination and a strategic approach, you can conquer the GRE Chemistry section and achieve your desired score.

Sterling Test Prep GRE Chemistry Practice Questions: High Yield GRE Chemistry Questions with Detailed Explanations

by Sterling Test Prep

4.3 out of 5