It should be identified from the following statement is correct or not. Concept Introduction : Natural gas like Carbon dioxide and gasoline contain Oxygen and it is a component of the source of natural gas. Gasoline sold today often contain C 2 H 5 OH ethanol, if the ethanol is derived from the fermentation of material derived from biological sources, then it is sometimes referred as Bioethanol.

Question

(A) if both sentences are true,(B) if both sentences are false,(C) if the first sentence is true but the second is false, and(D) if the first sentence is false but the second is true. 1. In a redox reaction, the oxidation number of iron changed from +2 to +3; thus, sulfur is a reducing agent. In a redox reaction, the oxidation number of nitrogen was unchanged; thus, nitrogen is an oxidant. 2. In a redox reaction, the reducing agent is oxidized and it gains electrons. In a redox reaction, the oxidizing agent is reduced and it gains electrons. 3. Bending stress is also known as flexural stress. The test used in observing the mechanical strength of chocolate is the three-point bend test. 4. The flexural strength of materials may be expressed in Pascals. Magnesium is more reactive than silver; therefore, magnesium corrodes faster than silver with the aid of air, oxygen, and sea water.

Answer 1

Question

Chapter 20.4, Problem 2RC

Interpretation Introduction

Interpretation: It should be identified from the following statement is correct or not.

Concept Introduction:

Natural gas like Carbon dioxide and gasoline contain Oxygen and it is a component of the source of natural gas.

Gasoline sold today often contain C2H5OH ethanol, if the ethanol is derived from the fermentation of material derived from biological sources, then it is sometimes referred as Bioethanol.

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(A) if both sentences are true,(B) if both sentences are false,(C) if the first sentence is true but the second is false, and(D) if the first sentence is false but the second is true. 1. In a redox reaction, the oxidation number of iron changed from +2 to +3; thus, sulfur is a reducing agent. In a redox reaction, the oxidation number of nitrogen was unchanged; thus, nitrogen is an oxidant. 2. In a redox reaction, the reducing agent is oxidized and it gains electrons. In a redox reaction, the oxidizing agent is reduced and it gains electrons. 3. Bending stress is also known as flexural stress. The test used in observing the mechanical strength of chocolate is the three-point bend test. 4. The flexural strength of materials may be expressed in Pascals. Magnesium is more reactive than silver; therefore, magnesium corrodes faster than silver with the aid of air, oxygen, and sea water.

Write the balanced chemical equations for (a) the complete combustion of acetic acid 1CH3COOH2, the main active ingredient in vinegar; (b) the decomposition of solid calcium hydroxide into solid calcium (II) oxide (lime) and water vapor; (c) the combination reaction between nickel metal and chlorine gas.

Most abundant metal on the surface of the earth:(a) Iron(b) Aluminium(c) Calcium(d) Sodium