When DG < 0, a process is spontaneous, when DG = 0 the system is at equilibrium, and DG > 0 has the reverse direction spontaneous. G is a form of energy that tends to reach a minimum for any spontaneous process at constant T and P When DG < 0 (spontaneous processes), DG is equal to the maximum work that can be obtained from the process.

Correct Option: B

When DG < 0, a process is spontaneous, when DG = 0 the system is at equilibrium, and DG > 0 has the reverse direction spontaneous. G is a form of energy that tends to reach a minimum for any spontaneous process at constant T and P When DG < 0 (spontaneous processes), DG is equal to the maximum work that can be obtained from the process.

The penetrating power is inversely related to size. Alpha particles, being the largest, penetrate the least. Gamma rays are the most penetrating of the radiations. They are highly energetic waves and are poor at ionising other atoms or molecules.

Correct Option: C

The penetrating power is inversely related to size. Alpha particles, being the largest, penetrate the least. Gamma rays are the most penetrating of the radiations. They are highly energetic waves and are poor at ionising other atoms or molecules.

When cathode rays strike a solid target of high atomic weight and high melting point such as tungsten, molybdenum, etc, they give rise to a highly penetrating radiation called the X-rays (LIT Physics by Dr. P.K Agarwal).

Correct Option: C

When cathode rays strike a solid target of high atomic weight and high melting point such as tungsten, molybdenum, etc, they give rise to a highly penetrating radiation called the X-rays (LIT Physics by Dr. P.K Agarwal).

The major use of sulphur is in the manufacture of sulphuric acid (H₂SO_{4) which is one of the most important compounds made by the chemical industry. It is used to make, literally, hundreds of compounds needed by almost every industry.}

Correct Option: A

The major use of sulphur is in the manufacture of sulphuric acid (H₂SO_{4) which is one of the most important compounds made by the chemical industry. It is used to make, literally, hundreds of compounds needed by almost every industry.}

Organic compounds are always covalent compounds because it is more energetically favorable for carbon to covalently bond. Organic compounds, such as carbohydrates, lipids, proteins and nucleic acids, are all examples of covalent compounds.

Correct Option: A

Organic compounds are always covalent compounds because it is more energetically favorable for carbon to covalently bond. Organic compounds, such as carbohydrates, lipids, proteins and nucleic acids, are all examples of covalent compounds.