Hydrocarbons are organic compounds containing carbon and hydrogen and found in crude oil and natural gas. Hydrocarbons are formed from the remains of marine animals and plants that lived in shallow inland seas, died, and drifted to the bottom. The term petroleum is used as a common denotation for crude oil (mineral oil) and natural gas, i.e., the hydrocarbons from which various oil and gas products are made.

Correct Option: C

Hydrocarbons are organic compounds containing carbon and hydrogen and found in crude oil and natural gas. Hydrocarbons are formed from the remains of marine animals and plants that lived in shallow inland seas, died, and drifted to the bottom. The term petroleum is used as a common denotation for crude oil (mineral oil) and natural gas, i.e., the hydrocarbons from which various oil and gas products are made.

There are six (6) protons in Carbon-12. The 12 refers to the number of protons plus the number of neutrons. There are 6 of each in carbon-12. The number of protons in the nucleus of an atom determines an element’s atomic number. The mass number of an element is the total of number of neutrons and number of protons.

Correct Option: A

There are six (6) protons in Carbon-12. The 12 refers to the number of protons plus the number of neutrons. There are 6 of each in carbon-12. The number of protons in the nucleus of an atom determines an element’s atomic number. The mass number of an element is the total of number of neutrons and number of protons.

J. (Julius) Robert Oppenheimer was born in New York City on April 22, 1904. Under Oppenheimer’s guidance, the laboratories at Los Alamos were constructed. There, he brought the best minds in physics to work on the problem of creating an atomic bomb. In the end, he was managing more than 3,000 people, as well as tackling theoretical and mechanical problems that arose. He is often referred to as the “father” of the atomic bomb.

Correct Option: B

J. (Julius) Robert Oppenheimer was born in New York City on April 22, 1904. Under Oppenheimer’s guidance, the laboratories at Los Alamos were constructed. There, he brought the best minds in physics to work on the problem of creating an atomic bomb. In the end, he was managing more than 3,000 people, as well as tackling theoretical and mechanical problems that arose. He is often referred to as the “father” of the atomic bomb.

The main gas released from car exhausts — carbon dioxide – is one of the major green house gasses. With large amounts of carbon dioxide being emitted into the atmosphere every day, the carbon cycle goes out of balance, and the carbon dioxide gas remains in the earth’s atmosphere, trapping heat and contributing to global warming and climate change.

Correct Option: C

The main gas released from car exhausts — carbon dioxide – is one of the major green house gasses. With large amounts of carbon dioxide being emitted into the atmosphere every day, the carbon cycle goes out of balance, and the carbon dioxide gas remains in the earth’s atmosphere, trapping heat and contributing to global warming and climate change.

Dilute sulfuric acid {H2SO4} serves as the electrolyte in a lead storage battery. The electrodes of the cells in a lead storage battery consist of lead grids. The openings of the anodic grid is filled with spongy (porous) lead. The openings of the cathodic grid is filled with lead dioxide {PbO2}.

Correct Option: D

Dilute sulfuric acid {H2SO4} serves as the electrolyte in a lead storage battery. The electrodes of the cells in a lead storage battery consist of lead grids. The openings of the anodic grid is filled with spongy (porous) lead. The openings of the cathodic grid is filled with lead dioxide {PbO2}.