Smokeless gunpowder is composed of –
**Core Concept**
Smokeless gunpowder is a type of propellant used in firearms and artillery, characterized by its ability to produce a high-pressure gas without the production of smoke. This is achieved through a different chemical composition compared to traditional black powder.
**Why the Correct Answer is Right**
Smokeless gunpowder is composed of nitrocellulose or a combination of nitrocellulose and nitroglycerin. The nitrocellulose is produced by nitrating cellulose, resulting in a highly energetic and stable compound. The nitroglycerin adds to the overall energy density of the propellant, allowing for increased muzzle velocity and range. The combustion of smokeless gunpowder produces a high-pressure gas, which is then expelled through the barrel of the firearm.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect, as it does not accurately describe the composition of smokeless gunpowder.
**Option B:** Incorrect, as it is not a key component of smokeless gunpowder.
**Option C:** Incorrect, as it is not a correct description of the composition or function of smokeless gunpowder.
**Clinical Pearl / High-Yield Fact**
Smokeless gunpowder is a highly energetic and stable compound that is used in a variety of military and sporting applications. It is characterized by its ability to produce a high-pressure gas without the production of smoke.
**Correct Answer:** D.