Chemistry Quiz 1 A - CHEM 1001 First Semester PDF

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Chemistry Quiz 1 A - CHEM 1001 First Semester - 2019/2020 University of Glasgow...

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Chemistry 1

2018–2019

Class Test 1 (A) Elements & Atoms (Dr D. Price), Compounds & Molecules (Dr C. Busche) 19 October 2018 Each question has one correct answer and is worth 1 mark.

Q01.

Q02.

Q03.

Which of the following statements is TRUE? (A)

A group is a row in the periodic table.

(B)

The elements of the s-, p-, and d-blocks are known as the main-group elements.

(C)

Indium, nitrogen, xenon, and bismuth are all found in the d-block.

(D)

The Group 1 elements are known as alkali metals.

(E)

The Group 1 elements are characteristically hard materials.

Which of the following statements is FALSE? (A)

The chemical symbol for sodium is Na.

(B)

Alkaline earth metals characteristically form dications.

(C)

Sodium metal reacts with water to produce an acid.

(D)

Lithium carbonate has the formula Li2CO3.

(E)

All alkali metal chlorides are colourless.

Which of the following statements about the relative sizes of atoms is FALSE? [The symbol “>” means “is bigger than”.] (A)

Q04.

Q05.

Se > S

(B) S > Si

(C) Sn > S

(D)

Sr > Sc

(E) Sc > Se

Given that E = energy, p = momentum, m = mass, v = velocity, !"= wavelength, f = frequency, h = Planck’s constant, and c = the speed of light, which of the following relationships is INCORRECT? (A)

# = ℎ!

(D)

# = " , '( ,

+

(B) & = '(

( C)

)

!=*

-

(E) ! = .

What are the allowed values for the principal quantum number n? (A)

0, 1, 2, 3, 4, …

(B)

0, 2, 4, 6, 8, …"

(D)

1, 2, 3, 4, …

(E)

+½, –½

Chemistry 1 2018–19

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(C) + ℓ, +ℓ – 1, +ℓ"– 2, …, – ℓ"

Class Test 1 (A)

Q06.

Q07.

Q08.

Which of the following shapes best represents an orbital with the quantum number ℓ = 1? (A)

(B)

(D)

(E)

For the quantum numbers n, ℓ, and mℓ, which of the following sets of values is an allowed combination? (A)

n = 3, ℓ = 1, m ℓ = +½

( B)

n = 2, ℓ = 1, m ℓ = 0

(D)

n = 2, ℓ = –1, m ℓ = 0

(E)

n = 1, ℓ = 1, m ℓ = +1

Q12.

Q13.

Q14.

(B)

–1

(C)

0

(D)

+1

(E)

+8

–3

(B)

–2

(C)

0

(D)

+2

(E)

+3

(D)

+2

(E)

+4

What is the oxidation state of platinum in K2PtCl6? (A)

Q11.

–6

What is the oxidation state of bismuth in Bi2O3? (A)

Q10.

(C) n = 4, ℓ = 4, m ℓ = 0

What is the oxidation state of osmium in osmium tetroxide, OsO4? (A)

Q09.

(C)

–2

(B)

0

(C)

+1

What structural shape is predicted by VSEPR theory for a molecule of bromine pentafluoride? (A)

square-planar

(B)

square pyramidal

(D)

T-shaped

(E)

see-saw

(C) tetrahedral

What structural shape is predicted by VSEPR theory for carbon tetrachloride? (A)

square-planar

(B)

square pyramidal

(D)

T-shaped

(E)

see-saw

(C) tetrahedral

Which of the following compounds DOES exist? (A)

barium tetrafluoride

(B)

titanium pentachloride

(D)

caesium(III) chloride

(E)

helium chloride

(C) titanium dioxide

For the reaction: 2 Rb + Cl2 ® 2 RbCl, which of the following statements is TRUE? (A)

Rb is the oxidant.

(B) The product RbCl is ionic.

(C)

RbCl is dark green.

(D) The neutral Cl2 molecule is oxidised.

(E)

Two molecule of chlorine gas reacts with 2 atoms of rubidium.

Chemistry 1 2018–19

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Class Test 1 (A)

Q15.

Q16.

Which of the following is a consistent set of labels for the five d-orbitals? (A)

123 , 124 , 134, 13 562 5 , 1235

( B)

12 5 , 13 5, 124, 134, 12 5635

(C)

12 5735 , 12 5635 , 12 5645 , 12 5735 , 14 5

( D)

123, 124 , 134, 12 5635 , 14 5

(E)

123 , 124 , 134, 1234 , 14 5

Which of these sequences of elements has the correct order for an increasing size of neutral atoms?

Q17.

(A)

He < Na < Si < Cl < Rb

(B)

Rb < Na < He < Si < Cl

(C)

He < Cl < Si < Na < Rb

(D)

Rb < Cl < Si < Na < He

(E)

Rb < Na < Si < Cl < He

Which of these sequences of elements has the correct order for an increasing electronegativity?

Q18.

Q19.

Q20.

(A)

I < Cl < Se < O < F

(B)

Li < Mg < Sc < Sn < Pb

(C)

S < Sc < Se < Sr < Sn

(D)

F < S < As < Sn < Tl

(E)

Rb < Mg < P < Cl < O

Which of the following statements is FALSE: (A)

In the absence of lone pairs, electronic structure and molecular shape are equal.

(B)

Oxidation is the loss of electrons.

(C)

The metallic character increases going down a group.

(D)

The electronegativity increases going right along a row.

(E)

The binding energy decreases with decreasing atom size.

Which of the following statements is TRUE? (A)

Iodine is the most electronegative halogen.

(B)

The maximum oxidation state of Te is +7.

(C)

The oxidation state of S in the S22– anion is –1.

(D)

The S22– anion is isoelectronic with N2.

(E)

In redox reactions, a spectator ion is involved in the reaction.

Which of the half-equations describes the reduction process in the following reaction: Cu(s) + 4 HNO3(aq) ® Cu(NO3)2(aq) + 2 NO2(g) + 2 H2O(ℓ) (A)

NO3 " + 2 e "+ 2 H+ ® NO2 + H2O

(B)

Cu ® Cu2+ + 2 e "

(C)

NO3 " + e " + 2 H+ ® NO2 + 2 H2O

(D)

4 NO3 " + e " + 2 H+ ® 4 NO2 + H2O

(E)

NO3 " + e " + 2 H+ ® NO2 + H2O

Chemistry 1 2018–19

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Class Test 1 (A)

Q21.

Which set of coefficients balances the reaction below? a PbO2(s) + b Pb(s) + c H2SO4(aq) ® d PbSO4(s) + e H2O( ℓ)

Q22.

(A)

a = 1, b = 1, c = 2, d = 2, e = 2

(B)

a = 2, b = 0, c = 2, d = 2, e = 2

(C)

a = 1, b = 1, c = 1, d = 1, e = 2

(D)

a = 1, b = 1, c = 2, d = 2, e = 1

(E)

a = 2, b = 2, c = 2, d = 2, e = 2

Which expression describes Coulomb’s Law? (A) (D)

Q23.

Q24.

# ∝" # ∝"

9: "×"9< =

9: "6"9< =

9

( B) E ∝ " ? : − :

9< ?<

( C)

# ∝"

9: "7"9< =

? 9

(E) # ∝ " ?< 9< :

:

The lattice enthalpy for NaCl is the enthalpy associated with which transformation? (A)

NaCl(g) ® Na+(g) + Cl–(g)

(B)

NaCl(s) ® Na+(aq) + Cl–(aq)

(C)

NaCl(aq) ® Na+(aq) + Cl–(aq)

(D)

NaCl(aq) ® Na+(g) + Cl–(g)

(E)

NaCl(s) ® Na+(g) + Cl–(g)

Which of the series of values (eV) represents the first five ionisations enthalpies of the element carbon?

Q25.

Q26.

(A)

9.79, 24.38, 207.27, 239.10, 1195.83

(B)

9.79, 18.63, 28.35, 50.13, 62.63

(C)

8.30, 25.15, 37.93, 259.38, 340.23

(D)

11.26, 24.38, 47.89, 64.49, 392.09

(E)

14.53, 29.60, 47.45, 77.47, 97.89

Which is the correct order of decreasing repulsion between electron pairs? [The symbol “>” means “is bigger than” and “=” means “equal to”.] (A)

lone pair – bond pair > bond pair – bond pair > lone pair – lone pair

(B)

lone pair – bond pair > lone pair – lone pair > bond pair – bond pair

(C)

lone pair – lone pair > bond pair – bond pair > lone pair – bond pair

(D)

lone pair – lone pair > lone pair – bond pair > bond pair – bond pair

(E)

lone pair – lone pair = lone pair – bond pair > bond pair – bond pair

What is the VSEPR theory used to determine? (A)

Lattice energy

(B) Oxidation number

(D)

Electronegativity

(E) Quantum number

Chemistry 1 2018–19

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(C) Shape of a molecule

Class Test 1 (A)...