Yellow Sheet-Types Of Rxns

Question 0

2Fe(OH)₃ (s) —> Fe₂O₃ (s) + 3H₂O (g)

Answer 0

D Some bases, when heated, decompose —> Basic Anhydride and H2O

*take off the water (one H and two O’s) to find the products

Question 1

Fe + Cu(NO₃)₂ → Fe(NO₃)₂ + Cu

Answer 1

SD A more active metal will displace a less active metal.

Question 2

Pb + 2AgC₂H₃0₂ → Pb(C₂H₃O₂)₂ + 2Ag

Answer 2

SD A more active metal will displace a less active metal.

Question 3

2Na + 2H₂O → 2NaOH + H₂

Answer 3

SD Some active metals like Na, Ca, K, will react with H₂O to produce an Hydroxide (OH) and H₂ gas

Question 4

Ca + 2H₂O —–> Ca(OH)₂ + H₂

Answer 4

SD Some active metals such as Na, Ca, K, will react with H₂O to produce a metal Hydroxide and H₂ gas.

Question 5

Zn+2HCl —–> ZnCl₂+H₂

Answer 5

SD Active metals such as Zn, Fe, Al will displace the H₂ in acids —–> a salt and H₂ gas

Question 6

Fe+H₂SO₄ —–> FeSO₄+H₂

Answer 6

SD Some active metals such as Zn, Fe, Al will displace the H₂ in acids —-> a salt and H₂ gas

Question 7

Cl₂+2NaBr —-> 2NaCl+Br₂

Answer 7

SD A more active Halogen displaces a less active Halogen

Question 8

Br₂+2KI —-> 2KBr +I₂

Answer 8

_SD _ A more active Halogen displaces a less active Halogen

Question 9

2KOH+H₂SO₄ —-> K₂SO₄+2H₂O

Answer 9

DD A+B —> S+H₂O

Question 10

Ca(OH)₂+2HNO₃ —-> Ca(NO₃)₂+2H₂O

Answer 10

DD A+B —> S+H₂O

Question 11

2KNO₃+H₂SO₄ —-> K₂SO₄+2HNO₃

Answer 11

DD S + A —> S + 2nd A

Question 12

FeS+2HCl —-> FeCl₂+H₂S

Answer 12

DD S + A —> S + 2nd A

Question 13

2NaCl +H₂SO₄ —-> Na₂SO₄+2HCl

Answer 13

DD S + A —> S + 2nd A

Question 14

AgNO₃+NaCl→ AgCl + NaNO₃

Answer 14

DD S + S —> S + Insoluble S

Question 15

Na₂SO₄+Ba(NO₃)₂ —-> BaSO₄+2NaNO₃

Answer 15

DD S + S —> S + Insoluble S

Question 16

CuSO₄+Na₂S —-> CuS+Na₂SO₄

Answer 16

DD S + S —> S + Insoluble S

Question 17

Ca(C₂H₃O₂)₂+(NH₄)₂CO₃ —-> CaCO₃+2NH₄C₂H₃O₂

Answer 17

DD S + S —> S + Insoluble S

Question 18

H₂SO₃ —-> SO₂ + H₂O

Answer 18

D If some Acids are heated, they decompose —> H₂O and A anhydride

*take off the water (one H and 2 O’s) to find the products

Question 19

H₂CO₃ —-> CO₂ + H₂O

Answer 19

D If some Acids are heated, they decompose —> H₂O and A anhydride

*take off CO₂ (one C and two O’s) to find the products

Question 20

NH₄Cl+NaOH —-> NaCl+NH₄OH

Answer 20

DD S + B —> S + 2nd B

Question 21

Ca(OH)₂ –^{^}–> CaO+H₂O

Answer 21

**D ** Some bases, when heated, decompose —> Basic Anhydride and H₂O

*take off the water (one H and two O’s) to find the products

Question 22

Li₂CO₃ —-> Li₂O + CO₂

Answer 22

D Some carbonates decompose when heated —> CO₂ + Metal Oxide

*take off the CO₂ (one C and two O’s) to find the products

Question 23

CaCO₃ —-> CaO + CO₂

Answer 23

D Some carbonates decompose when heated —> CO₂ + Metal oxide

*take off the CO₂ (one C and two O’s) to find the products

Question 24

2KClO3 ----\> 2KCl + 3O₂

Answer 24

**_D_** Some metal chlorates decompose when heated ---\> metal chlorides + O₂ gas \*take off _all_ the O₂ to find the products

Question 25

Ni(ClO₃)₂ ---\> NiCl₂ + 3O₂

Answer 25

**_D_** Some metal chlorates decompose when heated ---\> metal chlorides + O₂ gas \*take off _all_ the O₂ to find the products

Question 26

2HgO ---\> 2Hg + O₂

Answer 26

**_D_** Some metal oxides decompose when heated into their elements

Question 27

2Ag₂O ----\> 4Ag + O₂

Answer 27

**_D_** Some oxides decompose when heated into their elements

Question 28

2H₂O ---\> 2H₂ + O₂

Answer 28

**_D_** Some compounds decompose by electricity ---\> their elements

Question 29

2NaCl ---\> Na +Cl₂

Answer 29

**_D_** Some compounds decompose by electricity→ their elements

Question 30

MgCl₂ ---\> Mg +Cl₂

Answer 30

**_D_** Some compounds decompose by electricity ---\> their element

Question 31

Fe + S ---\> FeS

Answer 31

**_S_** Combination of elements

Question 32

2Na + Cl₂ ---\> 2NaCl

Answer 32

**_S_** Combination of elements

Question 33

SO₂ + H₂O ---\> H₂SO₃

Answer 33

**_S_** Combination of H₂O and A anhydride ---\> A

Question 34

CO₂ +H₂O ---\> H₂CO₃

Answer 34

**_S_** Combination of H₂O and A anhydride ---\> A

Question 35

Na₂O + H₂O ---\> 2NaOH

Answer 35

**_S_** Combination of Basic anhydride + H₂O ---\> B

Question 36

BaO + H₂O ---\> Ba(OH)₂

Answer 36

**_S_** Combination of Basic Anhydride + H₂O ---\> B

Question 37

CO₂ + Na₂O ---\> Na₂CO₃

Answer 37

**_S_** Basic Anhydride + A Anhydride ---\> S

Question 38

P₂O₅ + 3BaO ---\> Ba(PO₄)₂

Answer 38

**_S_** B Anhydride + A Anhydride ---\> S

Question 39

CH₄+2O₂ ---\> CO₂ + 2H₂O

Answer 39

**_C_** Hydrocarbon+O₂ ---\> CO₂+H₂O

Question 40

2C₄H₁₀ + 13O₂ ---\> 8CO₂ + 10H₂O

Answer 40

**_C_** Hydrocarbon + O₂---\> CO₂ + H₂O