GK (General Science)

Antacids are substances that neutralize excess stomach acid, which is the primary cause of indigestion. Antiseptics prevent infection, and analgesics are painkillers.

Phosphorus is a non-metal located in the p-block of the periodic table. Tin, lead, and radium are all metallic elements.

Milk of magnesia is a suspension of magnesium hydroxide, which is a common antacid used to treat heartburn and indigestion.

There are generally considered to be 22 non-metals in the periodic table (including noble gases).

Aluminium is the most abundant metal in the Earth's crust, making up about 8 percent of the crust by weight. Iron is the second most abundant metal.

Na2O (sodium oxide), NaOH (sodium hydroxide), and NH4OH (ammonium hydroxide) all exhibit basic properties in aqueous solutions. Therefore, all of the listed options are bases.

Glucose and alcohol are covalent compounds that do not dissociate into ions in water. Since they lack free ions, specifically hydrogen ions (H+) or other charge carriers, they cannot conduct electricity.

Calcium hydroxide (slaked lime) reacts with chlorine gas to produce calcium oxychloride, commonly known as bleaching powder.

Oxygen is the most abundant element in the Earth's crust, and it is a non-metal. Silicon is the second most abundant element, also a non-metal, but oxygen is more abundant.

Silver has the highest thermal conductivity of any metal. Copper is also an excellent conductor, but silver ranks first.

The pH scale is a logarithmic scale used to specify the acidity or basicity of an aqueous solution, typically ranging from 0 to 14.

Graphite is an allotrope of carbon that contains delocalized electrons, allowing it to conduct electricity, which is an exception for non-metals.

Pure water is neutral and has a pH value of 7 at 25 degrees Celsius.

Lead is a poor conductor of heat compared to other common metals like copper, aluminium, and silver.

Acidic soil is treated with basic substances to neutralize the acidity. Quick lime (CaO), slaked lime (Ca(OH)2), and chalk (CaCO3) are all basic and commonly used for this purpose.

On the pH scale, values less than 7 indicate acidity, 7 is neutral, and values greater than 7 indicate alkalinity (basic).

Nettle plant leaves contain methanoic acid (also known as formic acid), which causes a stinging sensation upon contact.

Rain water contains dissolved atmospheric gases and salts, which provide ions that allow it to conduct electricity. Distilled water and glucose solution lack these ions.

Highly reactive alkali metals like sodium and potassium react vigorously with moisture and oxygen in the air. Kerosene oil is used to store them because it is non-reactive and prevents contact with air.

Nitric acid is a key component in the production of nitrogen-based fertilizers, such as ammonium nitrate.

Hydrochloric acid (HCl) is used in the pickling process to remove oxide films (rust) from steel surfaces before galvanization.

Sulphuric acid is the electrolyte used in lead-acid car batteries.

A gas balloon rises because the buoyant force exerted by the surrounding air is greater than the weight of the balloon (Archimedes' principle).

At the center of the Earth, the gravitational pull from all directions cancels out, resulting in a net gravitational acceleration of zero. At the poles and equator, gravity is present, though it varies slightly due to the Earth's rotation and shape.