Explanation

Urea is a non-electrolyte, meaning it does not dissociate into ions in aqueous solution.

It does not conduct electricity.

Explanation

• When a saturated solution is diluted, the concentration of the solute decreases, and the solution becomes unsaturated.
• This means that the solution can still dissolve more solute than it currently contains.

Explanation

• An alloy is a homogeneous mixture of two or more metals, or a metal and a non-metal, in a solid state.
• The components of an alloy are typically mixed when they are molten, and then solidified to form a uniform solid solution.

Explanation

• The freezing point of a liquid can be affected by pressure.
• This is known as the "pressure melting point" effect.
• As pressure increases, the freezing point of a liquid can also increase.

Explanation

Steel is an alloy of iron (Fe) and carbon (C), with small amounts of other elements like manganese, chromium, and vanadium.

It's a mixture of two or more elements, where at least one is a metal, making it an alloy.

Explanation

• Butter is a mixture of solid fat particles (solute) dissolved in liquid oil (solvent), making it a solid-liquid solution.
• This type of solution is also known as a sol or a gel.

Explanation

Selenium (Se) is a metalloid, which means it exhibits some properties of metals and some properties of nonmetals.

Metalloids are elements that are intermediate in character between metals and nonmetals.

Explanation

• Henry Moseley's famous work in 1913 showed that the chemical properties of elements are a periodic function of their atomic number (Z), not their atomic mass.
• This discovery led to the modern periodic table, where elements are arranged in order of increasing atomic number (Z), rather than atomic mass.

Explanation

• When one atom loses an electron to form a cation and another atom gains that electron to form an anion, the resulting attraction between the oppositely charged ions is an ionic bond.
• This type of bond is typically formed between a metal and a nonmetal, and is characterized by a transfer of electrons rather than a sharing of electrons (as in covalent bonds).

Explanation

The periodic table divided into S, P, d, and f block based on Electronic Configuration.

• S block: The s block includes the first two columns of the periodic table, which are the alkali and alkaline earth metals.
• P block: The p block includes the elements in the six columns on the right side of the periodic table.
• D block: The d block includes the elements in the ten columns in the middle of the periodic table. These are also known as the transition metals.
• F block: The f block includes the elements at the bottom of the periodic table, which are known as the inner transition metals or lanthanides and actinides.