Year 11 Term 1 HL Exam

8/10/2019 Year 11 Term 1 HL Exam

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IB Questionbank Chemistry

Year 11 HL Term 1 Practice Exam

chapters 1, 2 and 3

22/3/14

30 min

15 marks

NO calculators Allowed

1. Which is the best definition of electronegativity?

! "#ectrone$ati%ity is the ener$y re&uired for a $aseous atom to $ain an e#ectron!

IB Questionbank Chemistry 1


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B! "#ectrone$ati%ity is the attraction of an atom for a bondin$ pair of e#ectrons!

C! "#ectrone$ati%ity is the attraction bet'een the nuc#eus and the %a#ence e#ectrons of an

atom!

(! "#ectrone$ati%ity is the abi#ity of an atom to attract e#ectrons from another atom!(Total 1 mark)

2. Which statements about the isotopes of ch#orine, C#35

1) and C#3)

1) , are correct?

I! *hey ha%e the same chemica# properties!

II! *hey ha%e the same atomic number!

III! *hey ha%e the same physica# properties!

! I and II on#y

B! I and III on#y

C! II and III on#y

(! I, II and III(Total 1 mark)

3. In the emission spectrum of hydro$en, 'hich e#ectronic transition 'ou#d produce a #ine in the

%isib#e re$ion of the e#ectroma$netic spectrum?

! n + 2 n = 1

B. n = 3 n = 2

C. n = 2 n = 3

D. n = - n = 1(Total 1 mark)



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4. Which statement describes the trends of electronegativity values in the periodic table?

. !alues increase from left to right across a period and increase do"n a group.

B. !alues increase from left to right across a period and decrease do"n a group.

C. !alues decrease from left to right across a period and increase do"n a group.

D. !alues decrease from left to right across a period and decrease do"n a group.(Total 1 mark)

5. Which e#uation best represents the first ioni$ation energy of magnesium?

. %g&s' .$(&s' ( e/

B. %g&g' .$2(

&g' ( 2e/

C. %g&g' .$(&g' ( e

/

D. %g&s' .$(&g' ( e

/

(Total 1 mark)

6. Consider the relative abundance of the isotopes of element ).

Isotope Relative abundance (%)

2*) +,

2-) 1,

2) 1,

What is the relative atomic mass of )?

. 2*

B. 2-

C. Bet"een 2* and 2-

D. Bet"een 2- and 2(Total 1 mark)



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7. /he graph represents the energy needed to remove nine electrons0 one at a time0 froman atom of an element. ot all of the electrons have been removed.

Which element could this be?

. C

B. i

C.

D. (Total 1 mark)

8. Bet"een "hich ioni$ation energies of boron "ill there be the greatest difference?

. Bet"een 1st and 2nd ioni$ation energies

B. Bet"een 2nd and 3rd ioni$ation energies

C. Bet"een 3rd and *th ioni$ation energies

D. Bet"een *th and -th ioni$ation energies(Total 1 mark)

. What are the products of the reaction bet"een chlorine and "ater?

. 420 52and 5Cl

B. 52and 4Cl2

C. 5Cl and 54Cl

D. 54Cl0 52and Cl2(Total 1 mark)



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1!. Which property increases do"n group 1?

. 6irst ioni$ation energy

B. %elting point

C. 7eactivity

D. 8lectronegativity(Total 1 mark)

11. n ion has the electron configuration 1s22s

22p

3s

23p

3d

1,. Which ion could it be?

. i2(

B. Cu(

C. Cu2(

D. Co3(

(Total 1 mark)

1". Which statements about period 3 are correct?

9. /he electronegativity of the elements increases across period 3.

99. /he atomic radii of the elements decreases across period 3.

999. /he o:ides of the elements change from acidic to basic across period 3.

. 9 and 99 only

B. 9 and 999 only

C. 99 and 999 only

D. 90 99 and 999(Total 1 mark)



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1#. What is the electron configuration of 6e3(

?

. ;r

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Year 11 Term 1 HL Exam