Correct Answer: B. 3

Correct Answer: D. polarized

Correct Answer: D. General acceptability

Explanation

(a) Production is the transformation of raw materials into finished goods and distribution to the consumers to satisfy their wants. It involves the making of goods and services to satisfy human wants. Production can also be defined as the act of making goods and services available to the public, i.e creation of utility.

Correct Answer: C) +0.554V

Explanation

The question provides two half-cell reactions with their respective standard reduction potentials:

1) \(2H_2O_{(l)} \rightarrow O_{2(g)} + 4H^+_{(aq)} + 4e\), \(E^0 = -1.23V\)

2) \(2H_2O_{2(l)} \rightarrow 2O_{2(g)} + 4H^+_{(aq)} + 4e\), \(E^0 = -0.68V\)

To determine the standard cell potential (\(E^0_{cell}\) for the overall reaction, we first need to identify the oxidation and reduction half-reactions. Looking at the given reactions, we can see that the first reaction has a more negative standard reduction potential, which means it is more likely to undergo oxidation. So, we reverse the reaction:

\(O_{2(g)} + 4H^+_{(aq)} + 4e \rightarrow 2H_2O_{(l)}\), \(E^0 = +1.23V\)

Now, we have the oxidation half-reaction and the reduction half-reaction:

Oxidation: \(O_{2(g)} + 4H^+_{(aq)} + 4e \rightarrow 2H_2O_{(l)}\), \(E^0 = +1.23V\)

Reduction: \(2H_2O_{2(l)} \rightarrow 2O_{2(g)} + 4H^+_{(aq)} + 4e\), \(E^0 = -0.68V\)

To find the standard cell potential (\(E^0_{cell}\), we add the standard reduction potentials of the oxidation and reduction half-reactions:

\(E^0_{cell} = E^0_{ox} + E^0_{red} = (+1.23V) + (-0.68V) = +0.55V\)

Thus, the standard cell potential for the overall reaction is approximately+0.554V (Option C).

Correct Answer: B. Cracking

Explanation

The correct answer is B. Cracking.

Cracking is the process in which larger, long-chain hydrocarbon molecules (in this case, dodecane, C_{12}H_{26}) are broken down into smaller, more useful hydrocarbons, such as shorter alkanes (C_2H_6) and alkenes (C_2H_4).

Correct Answer: C. the ghost still loves his wife even in death

Correct Answer: D) zinc

Correct Answer: D. The ratio of real GDP to the real money supply

Explanation

Velocity of money is the total amount of money in circulation in an economy. It is calculated as Velocity of money = GDP/Money Supply

Explanation

Since it is divide into 3 sectors

then \(8x° = 360°\)

\(x° = 45°\)

The 3rd sector = 3 times the size of the other two sectors put together

= \(3(45 + 45) = 3(90) = 270°\)

Perimeter of a sector = \(2r + l\)

where r = radius of the circle ; l = length of arc = \(\frac{\theta}{360°} \times 2\pi r\)

Area of circle = \(\frac{22}{7} \times r^{2} = 154 cm^{2}\)

\(r^{2} = \frac{154 \times 7}{22} = 49\)

\(r = 7 cm\)

\(l = \frac{270}{360} \times 2 \times \frac{22}{7} \times 7 = 33 cm\)

Perimeter of sector = \(2(7) + 33 = 14 + 33 = 47 cm\).