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CHEMICAL EQUATIONS

Authored by Natasya Nat

Chemistry

University

Used 3+ times

CHEMICAL EQUATIONS
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7 questions

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1.

MULTIPLE CHOICE QUESTION

20 sec • 5 pts

In chemical equation,the number of atoms of each element on both sides of the equation must be the same.

TRUE

FALSE

2.

MULTIPLE CHOICE QUESTION

20 sec • 10 pts

In chemical equation, name of product must be write on left-hand side meanwhile name of reactant on right-hand side.

TRUE

FALSE

3.

MULTIPLE CHOICE QUESTION

20 sec • 20 pts

Which one is correct chemical equations for following reactions :

nitrogen gas + hydrogen gas → ammonia gas

N2 (s) + 3H2 (g) → 2NH3 (g)

N2 (g)+ 4H2 (g) → 2NH4 (g)

N2 (g) + 3H2 (g) → 2NH3 (g)

N2 (g) + H2 (g)→ NH3 (g)

4.

MULTIPLE CHOICE QUESTION

20 sec • 20 pts

Which one is correct chemical equations for following reactions :

sodium metal + water → aqueous solution of sodium hydroxide + hydrogen gas

2Na + 2H2O → 2NaOH +H2

2Na(s) + 2H2O(l) → 2NaOH (aq) +H2 (g)

Na2(s) + (H2O)2(l) → 2NaOH(aq) +H2 (g)

2NaOH (aq) +H2 (g) → 2Na(s) + 2H2O(l)

5.

MULTIPLE CHOICE QUESTION

20 sec • 15 pts

Which one is correct chemical equations for following reactions :

Solid copper(II) carbonate decomposes into solid copper (II) oxide and carbon dioxide gas when heated.

copper(II) carbonate → copper (II) oxide + carbon dioxide gas

CuCO3 (s) → CuO (s) +

Δ

CO2 (g)

CuCO3 (s) → CuO (s) +

CO2 (g)

CuCO3 → CuO +

Δ

CO2

CuCO3 (s) → CuO (s) +

Δ

CO2 (s)

6.

MULTIPLE CHOICE QUESTION

20 sec • 20 pts

Which one is correct chemical equations for following reactions :

Burning of aluminium powder in excess oxygen produces white aluminium oxide powder.

aluminium + oxygen → aluminium oxide

4Al + 3O2 → 2Al2O3

2Al(s) + 3O2(g) → Al2O3 (s)

4Al(s) + 3O2(g) → 2Al2O3 (s)

4Al(s) + 3O2(g) → 2Al3O2 (s)

7.

MULTIPLE CHOICE QUESTION

20 sec • 20 pts

Chemical equation can be balanced by adjusting the number of ________ infront of chemical formula

mol

coefficient

subscripts

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