3.1 Hanner Hafaliadau

3.1 Hanner Hafaliadau

9th - 12th Grade

10 Qs

quiz-placeholder

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3.1 Hanner Hafaliadau

3.1 Hanner Hafaliadau

Assessment

Quiz

Chemistry

9th - 12th Grade

Medium

Created by

E Evans

Used 1+ times

FREE Resource

10 questions

Show all answers

1.

MATCH QUESTION

5 mins • 5 pts

Cysylltwch y gell gyda'r lliw

Oren

MnO4- + 8H+ + 5e-

Gwyrdd

Mn2+ + 4H2O

Brown

I2 + 2e-

Di-liw

2Cr3+ + 7H2O

Porffor tywyll

Cr2O72- + 14H+ +6e-

2.

CLASSIFICATION QUESTION

5 mins • 6 pts

Rhowch yr adweithyddion yn y categori cywir.

Groups:

(a) Ocsidyddion

,

(b) Rhydwythyddion

MnO4-

I-

C2O42-

O2

Fe2+

Br2

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

I2 + ?? --> 2I-

e-

2e-

2p+

p+

4.

FILL IN THE BLANK QUESTION

1 min • 1 pt

MnO4- + 8H+ +5e- --> Mn2+ + ????

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Cr2O72- + 14H+ 6e- --> ?

2Cr3+ + 7H2O

2CrO4- + 4H2 + 3H2O

2Cr6+ + 7H2O

2CrO2 + 5H2O + 2H2

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

???? --> Fe3+ + e-

Fe

Fe+

Fe2+

7.

MATCH QUESTION

5 mins • 10 pts

Parwch nifer yr electronau i'r elfennau.

(Bydd cyflyrau ocsidiad yn helpu)

4e-

Fe2+ --> Fe3+ + ???

6e-

MnO4- + 8H+ + ??? --> Mn2+ + 4H2O

1e-

Cr2O72- + 14H+ + ??? --> 2Cr3+ + 7H2O

5e-

2S2O32- --> S4O62- + ???

2e-

O2 + ?? --> 2O2-

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