1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
daser333 [38]
2 years ago
7

Which of the following is an oxidation-reduction reaction?

Chemistry
2 answers:
polet [3.4K]2 years ago
5 0

<u>Answer:</u> The correct answer is Option a.

<u>Explanation:</u>

Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

For the given options:

<u>Option A:</u> Fe_2O_3+3CO\rightarrow 2Fe+3CO_2

On reactant side:

Oxidation state of iron = +3

Oxidation state of carbon = +2

On product side:

Oxidation state of iron = 0

Oxidation state of carbon = +4

The oxidation state of iron reduces from +3 to 0, it is getting reduced. Thus, it is getting reduced and it undergoes reduction reaction. The oxidation state of carbon increases from +2 to +4. Thus, it is getting oxidized and it undergoes oxidation reaction.

Thus, it is considered as redox reaction.

<u>Option B:</u> CuSO_4+2NaOH\rightarrow Cu(OH)_2+Na_2SO_4

The above reaction is double displacement reaction because here exchange of ions takes place.

<u>Option C:</u> 2NaOH+H_2CO_3\rightarrow Na_2CO_3+2H_2O

The above reaction is a neutralization reaction because an acid reacts with base to produce salt and water.

<u>Option D:</u> Pb(NO_3)2+Na_2SO_4\rightarrow 2NaNO_3+PbSO_4

The above reaction is double displacement reaction because here exchange of ions takes place.

Hence, the correct answer is Option A.

likoan [24]2 years ago
3 0
A) Fe⁺³₂O₃ + 3C⁺²O -> 2Fe⁰ + 3C⁺⁴O₂
You might be interested in
Which of the following best explains how subsoil becomes rich in minerals?
balu736 [363]
The nurse<span> is </span>caring<span> for a </span>client<span> with a temperature of 104.5 degrees Fahrenheit.  A health </span>care provider<span> prescribes 500 mg of an antibiotic intravenous  While undergoing a soapsuds </span>enema, theclient reports abdominal<span> cramping.</span>
5 0
2 years ago
A sample of gas occupies 300 mL at 100K. What is its volume when the
iris [78.8K]

If the temperature of the sample of gas increases to the given value, the volume also increases to 600mL.

<h3>What is Charles's law?</h3>

Charles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.

It is expressed as;

V₁/T₁ = V₂/T₂

Given the data in the question;

  • Initial temperature of gas T₁ = 100K
  • Initial volume of gas V₁ = 300mL
  • Final temperature T₂ = 200K
  • Final volume V₂ = ?

V₁/T₁ = V₂/T₂

V₂ = V₁T₂ / T₁

V₂ = ( 300mL × 200K ) / 100K

V₂ = 60000mLK / 100K

V₂ = 600mL

Therefore, if the temperature of the sample of gas increases to the given value, the volume also increases to 600mL.

Learn more about Charles's law here: brainly.com/question/12835309

#SPJ1

3 0
2 years ago
What is the molecular formula of the hydrocarbon whose molar mass is 536 g/mol and contains 89.55 w/w% carbon?
leonid [27]

Given the percentage composition of HC as C → 81.82 % and H → 18.18 %

So the ratio of number if atoms of C and H in its molecule can will be:

C : H = 81.82 12 : 18.18 1 C : H = 6.82 : 18.18 = 6.82 6.82 : 18.18 6.82 = 1 : 2.66 ≈ 3 : 8

So the Empirical Formula of hydrocarbon is:

C 3 H 8

As the mass of one litre of hydrocarbon is same as that of C O 2 The molar mass of the HC will be same as that of C O 2 i.e 44 g mol

Now let Molecular formula of the HC be ( C 3 H 8 ) n

Using molar mass of C and H the molar mass of the HC from its molecular formula is:

( 3 × 12 + 8 × 1 ) n = 44 n So 44 n = 44 ⇒ n = 1

Hence the molecular formula of HC is C 3 H 8

Does that help?

7 0
3 years ago
The correct labels for the numbers in Figure 7-1 are (1) ____________________, (2) ____________________, and (3) _______________
Scrat [10]

Answer:

A horizon, B horizon, C horizon .

6 0
3 years ago
The Periodic Table of Elements is organized by the number of:
bija089 [108]

Answer:

c) protons

Explanation:

7 0
2 years ago
Read 2 more answers
Other questions:
  • A 56.8g sample of aluminum is heated from 79.5°C to 143.7°C. The specific heat capacity of aluminum is 0.900 J/(g*K). Calculate
    12·1 answer
  • Nuclear chemistry findings contradict __________________ theory of indivisible atoms.
    10·1 answer
  • During STATIC ELECTRICITY to what type of objects &amp; direction do electrons ALWAYS move to?
    14·1 answer
  • The formula equation below represents a _________ reaction. CaO (s) H2O (l) → Ca(OH)2(l)
    8·1 answer
  • Which substance gives heat and light after combustion?
    13·1 answer
  • What are 4 things an element can do with electrons
    10·2 answers
  • What happens when hydrogen gas is passed over hot ferric oxide plzz help ​
    9·1 answer
  • [H3O+] = 2.9 x 10-10 M<br> ph level
    15·1 answer
  • 9. How do airbags protect the occupants of a car in a crash? Use the following words in
    15·1 answer
  • About the instruction that marko gave to hinano
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!