Which combination describes the PH 4 + ion?

Tetrahedral; sp 3 hybridization

Square Planar, sp 3 hybridization

Tetrahedral, sp 2 hybridization

Square Planar, sp 2 hybridization

Which equation represents enthalpy of hydration?

NaCl(s) → Na + (g) + Cl − (g)

NaCl(s) → Na + (aq) + Cl − (aq)

Which combination of Δ H θ and Δ S θ will result in a non-spontaneous reaction at all temperatures?

Δ H θ - Positive; Δ S θ - Negative

Δ H θ - Negative; Δ S θ - Positive

Δ H θ - Positive; Δ S θ - Positive

Δ H θ - Negative; Δ S θ - Negative

Which statement is correct for the overall reaction in a voltaic cell? 2AgNO 3 (aq) + Ni(s) → 2Ag(s) + Ni(NO 3 ) 2 (aq) E θ = +1.06 V

Ag has a more positive standard electrode potential value than Ni.

Electrons flow from Ag electrode to Ni electrode.

Ni is oxidized to Ni 2+ at the cathode (negative electrode).

Ag + is reduced to Ag at the anode (positive electrode).

Which is the first step in the CFC-catalysed destruction of ozone in UV light?

CCl 2 F 2 → •CClF 2 + Cl•

CCl 2 F 2 → CClF 2 + + Cl –

CCl 2 F 2 → CCl 2 F + + F –

CCl 2 F 2 → •CCl 2 F + F•

Which statement is correct?

Pi bonds are formed parallel to the axis between atoms.

Sigma bonds are formed only by the combination of s atomic orbitals.

Pi bonds can be formed in the absence of sigma bonds.

Pi bonds are formed only by the combination of hybrid orbitals.

Which is correct about reaction mechanisms?

Reactants in a fast step before the slow step are included in the rate expression.

A species that is zero order does not take part in the reaction.

A catalyst does not take part in the reaction.

Reactants in a fast step after the slow step are included in the rate expression.

Ammonia is a stronger ligand than water. Which is correct when concentrated aqueous ammonia solution is added to dilute aqueous copper(II) sulfate solution?

Ammonia replaces water as a ligand.

The d-orbitals in the copper ion split.

There is a smaller splitting of the d-orbitals.

The colour of the solution fades.

What is the correct explanation for the colour of [Cu(H 2 O) 6 ] 2+ ?

Light is absorbed when an electron moves to a d orbital of higher energy.

Light is released when an electron moves to a d orbital of higher energy.

Light is absorbed when electrons move from the ligands to the central metal ion.

Light is absorbed when electrons move between d and s orbitals.

Which best explains why transition metal complexes are coloured?

As electrons are promoted to higher energy levels, light of a certain colour is absorbed, and the complementary colour is observed.

As electrons return to lower energy levels, light of a certain colour is emitted, and the complementary colour is observed.

As electrons return to lower energy levels, light of a certain colour is emitted, so the complex appears to have the same colour.

As electrons are promoted to higher energy levels, light of a certain colour is absorbed, so the complex appears to have the same colour.

Which transition represents an enthalpy of hydration?

A. 2H 2 O (l) → H 3 O + (aq) + OH − (aq)

NaCl (s) → Na + (aq) + Cl − (aq)

Which mixture is a buffer solution?

50 cm 3 of 0.10 mol dm -3 NH 3 (aq) and 25 cm 3 of 0.10 mol dm -3 HCl (aq)

25 cm 3 of 0.10 mol dm -3 NH 3 (aq) and 50 cm 3 of 0.10 mol dm -3 HCl (aq)

25 cm 3 of 0.10 mol dm -3 NaOH (aq) and 25 cm 3 of 0.10 mol dm -3 HCl (aq)

50 cm 3 of 0.10 mol dm -3 NaOH (aq) and 25 cm 3 of 0.10 mol dm -3 HCl (aq)

Which statement about a first-order reaction is correct?

The reactant concentration decreases exponentially with time.

The reactant concentration decreases linearly with time.

The rate of reaction remains constant as the reaction proceeds.

The rate of reaction increases exponentially as the reaction proceeds.

Consider the rate expression: Rate = k[X][Y] Which change decreases the value of the rate constant, k?

Decrease in the reaction temperature

Increase in the reaction temperature

Increase in the concentration of X and Y

Decrease in the concentration of X and Y

Two half-cells are connected via a salt bridge to make a voltaic cell. Which statement about this cell is correct?

Ions flow through the salt bridge.

Oxidation occurs at the positive electrode (cathode).

It is also known as an electrolytic cell.

It requires a power supply to operate.

What should be changed to alter the rate of nucleophilic substitution of tertiary halogenoalkanes?

The concentration of the tertiary halogenoalkane

The concentration of the nucleophile

The first ionization energies (in kJ mol -1 ) of five successive elements in the periodic table are: 1314, 1681, 2081, 496 and 738 What could these elements be?

The last three elements of one period and the first two elements of the next period

The last two elements of one period and the first three elements of the next period

The last five elements of a period

The same quantity of electricity is passed through separate dilute aqueous solutions of sulfuric acid and copper(II) sulfate using platinum electrodes under the same conditions. Which statement is correct?

The same volume of oxygen is obtained in both cases.

The same volume of hydrogen is obtained in both cases.

The amount of copper deposited at the negative electrode in the copper(II) sulfate solution is half the amount of hydrogen gas formed at the negative electrode in the sulfuric acid solution.

The pH of both solutions increases as the electrolysis proceeds.

IB Chemistry Options

Authored by Charles Martinez

Chemistry

University

NGSS covered

AI Actions

Add similar questions

Adjust reading levels

Convert to real-world scenario

Translate activity

More...

Content View

Student View

46 questions

Show all answers

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which statements are correct for ionic compounds?
I. Lattice energy increases as ionic radii increase.
II. Within the same group, the melting point of salts tends to decrease as the radius of the cation increases.
III. Solubility in water depends on the relative magnitude of the lattice energy compared to the hydration energy.

I and II only

I and III only

II and III only

What is the standard enthalpy of formation, in kJ mol^–1, of IF (g)?
IF₇ (g) + I₂ (s) → IF₅ (g) + 2IF (g) ΔH = –89 kJ
ΔH_f (IF₇) = –941 kJ mol^–1
ΔH_f (IF₅) = –840 kJ mol^–1

–190

–95

+95

Which equation represents the lattice enthalpy of magnesium sulfide?

MgS (s) → Mg (g) + S (g)

MgS (s) → Mg⁺ (g) + S^– (g)

MgS (s) → Mg²⁺ (g) + S^2– (g)

MgS (s) → Mg (s) + S (s)

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The rate expression for the reaction X (g) + 2Y (g) → 3Z (g) is
rate = k[X]⁰ [Y]²
By which factor will the rate of reaction increase when the concentrations of X and Y are both increased by a factor of 3?

At 700 ºC, the equilibrium constant, K_c, for the reaction is 1.075 × 10⁸.
2H₂ (g) + S₂ (g) <- -> 2H₂S (g)
Which relationship is always correct for the equilibrium at this temperature?

[H₂S]² < [H₂]² [S₂]

S₂] = 2[H₂S]

[H₂S] < [S₂]

[H₂S]² > [H₂]²[S₂]

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following will form a buffer solution if combined in appropriate molar ratios?

HCl and NaCl

NaOH and HCOONa

NH₄Cl and HCl

HCl and NH₃

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the product of the reaction between pentan-2-one and sodium borohydride, NaBH₄?

Pentan-1-ol

Pentan-2-ol

Pentanoic acid

Pentanal

Access all questions and much more by creating a free account

Create resources

Host any resource

Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever

or continue with

Microsoft

Apple

Others

Already have an account?

Similar Resources on Wayground

49 questions

Chemical Kinetics AP

Quiz

•

9th Grade - University

45 questions

Biochemistry

Quiz

•

KG - University

50 questions

Revisão Geral - Superior

Quiz

•

8th Grade - University

50 questions

Chemistry Regent Exam-June 2010

Quiz

•

KG - University

42 questions

Exam 3: Chemistry

Quiz

•

University

50 questions

Electron Configuration Test Review

Quiz

•

11th Grade - University

46 questions

matter Part 1 24.25

Quiz

•

8th Grade - University

47 questions

Science group quiz no 2

Quiz

•

KG - Professional Dev...

Popular Resources on Wayground

15 questions

Fractions on a Number Line

Quiz

•

3rd Grade

10 questions

Probability Practice

Quiz

•

4th Grade

15 questions

Probability on Number LIne

Quiz

•

4th Grade

20 questions

Equivalent Fractions

Quiz

•

3rd Grade

25 questions

Multiplication Facts

Quiz

•

5th Grade

$fractions$

22 questions

fractions

Quiz

•

3rd Grade

6 questions

Appropriate Chromebook Usage

Lesson

•

7th Grade

10 questions

Greek Bases tele and phon

Quiz

•

6th - 8th Grade

Discover more resources for Chemistry

12 questions

IREAD Week 4 - Review

Quiz

•

3rd Grade - University

20 questions

Endocrine System

Quiz

•

University

7 questions

Renewable and Nonrenewable Resources

Interactive video

•

4th Grade - University

30 questions

W25: PSYCH 250 - Exam 2 Practice

Quiz

•

University

5 questions

Inherited and Acquired Traits of Animals

Interactive video

•

4th Grade - University

20 questions

Implicit vs. Explicit

Quiz

•

6th Grade - University

7 questions

Comparing Fractions

Interactive video

•

1st Grade - University

38 questions

Unit 8 Review - Absolutism & Revolution

Quiz

•

10th Grade - University

IB Chemistry Options

What is the standard enthalpy of formation, in kJ mol^–1, of IF (g)?
IF₇ (g) + I₂ (s) → IF₅ (g) + 2IF (g) ΔH = –89 kJ
ΔH_f (IF₇) = –941 kJ mol^–1
ΔH_f (IF₅) = –840 kJ mol^–1

Which equation represents the lattice enthalpy of magnesium sulfide?

The rate expression for the reaction X (g) + 2Y (g) → 3Z (g) is
rate = k[X]⁰ [Y]²
By which factor will the rate of reaction increase when the concentrations of X and Y are both increased by a factor of 3?

At 700 ºC, the equilibrium constant, K_c, for the reaction is 1.075 × 10⁸.
2H₂ (g) + S₂ (g) <- -> 2H₂S (g)
Which relationship is always correct for the equilibrium at this temperature?

Which of the following will form a buffer solution if combined in appropriate molar ratios?

What is the product of the reaction between pentan-2-one and sodium borohydride, NaBH₄?

Which combination describes the PH₄⁺ ion?

Which species have resonance structures?
I. Ozone, O₃
II. Carbon dioxide, CO₂
III. Benzene, C₆H₆

Which equation represents enthalpy of hydration?

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

IB Chemistry Options

What is the standard enthalpy of formation, in kJ mol–1, of IF (g)?IF7 (g) + I2 (s) → IF5 (g) + 2IF (g) ΔH = –89 kJΔHf (IF7) = –941 kJ mol–1ΔHf (IF5) = –840 kJ mol–1

Which equation represents the lattice enthalpy of magnesium sulfide?

The rate expression for the reaction X (g) + 2Y (g) → 3Z (g) is rate = k[X]0 [Y]2By which factor will the rate of reaction increase when the concentrations of X and Y are both increased by a factor of 3?

At 700 ºC, the equilibrium constant, Kc, for the reaction is 1.075 × 108.2H2 (g) + S2 (g) <- -> 2H2S (g)Which relationship is always correct for the equilibrium at this temperature?

Which of the following will form a buffer solution if combined in appropriate molar ratios?

What is the product of the reaction between pentan-2-one and sodium borohydride, NaBH4?

Which combination describes the PH4+ ion?

Which species have resonance structures?I. Ozone, O3II. Carbon dioxide, CO2III. Benzene, C6H6

Which equation represents enthalpy of hydration?

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

What is the standard enthalpy of formation, in kJ mol^–1, of IF (g)?
IF₇ (g) + I₂ (s) → IF₅ (g) + 2IF (g) ΔH = –89 kJ
ΔH_f (IF₇) = –941 kJ mol^–1
ΔH_f (IF₅) = –840 kJ mol^–1

The rate expression for the reaction X (g) + 2Y (g) → 3Z (g) is
rate = k[X]⁰ [Y]²
By which factor will the rate of reaction increase when the concentrations of X and Y are both increased by a factor of 3?

At 700 ºC, the equilibrium constant, K_c, for the reaction is 1.075 × 10⁸.
2H₂ (g) + S₂ (g) <- -> 2H₂S (g)
Which relationship is always correct for the equilibrium at this temperature?

What is the product of the reaction between pentan-2-one and sodium borohydride, NaBH₄?

Which combination describes the PH₄⁺ ion?

Which species have resonance structures?
I. Ozone, O₃
II. Carbon dioxide, CO₂
III. Benzene, C₆H₆