Explanation

• The complete transfer of one or more electrons from one atom to another atom forms an ionic bond.
• This type of bond is characterized by the electrostatic attraction between two ions with opposite charges, typically a metal cation and a nonmetal anion.
• The atom that loses an electron becomes a positively charged ion (cation), while the atom that gains an electron becomes a negatively charged ion (anion).

Explanation

Lime water when used with butter to form butyric acid can cure acidity.

The butyric acid is acidic.

The lime water (soluble form of calcium hydroxide) is basic.

Acid & base mix & become neutral which cures the acidity

Explanation

 As a chemical reaction progresses, the concentration of reactants decreases, leading to a decrease in the rate of reaction.

This is because there are fewer reactant particles available to collide and react. 

Explanation

 In $text{K}_2text{Cr}_2text{O}_7$, total oxidation state must be 0. K = +1, O = –2, so Cr must be +6 to balance the equation:

$$2(+1)+2(x)+7(–2)=0\Rightarrow x=+6$$

Explanation

 CH₃COONH₄ – Salt of weak acid (acetic acid) and weak base (ammonia) → Can be slightly acidic, neutral, or basic depending on their relative strength, but usually basic if acetate dominates

Explanation

Adding more SO₂ – This would increase the yield by shifting the equilibrium toward the product (Le Chatelier's principle).

Explanation

To find the moles, divide the mass of NaOH (60g) by its molar mass (40g/mol). 

Moles = 60/40 =1.5 moles

Explanation

• Methyl orange is a pH indicator that changes color in response to changes in acidity or basicity.
• In an acidic medium, it is orange (or red), and in a basic medium, it turns yellow.

Explanation

• Lead-210 is used to determine the accumulation rates of pollutants in layers of soil.
• It helps in studying sedimentation rates and the historical deposition of pollutants.

Explanation

The molecule that exhibits all three types of bonding—ionic, covalent, and coordinate covalent—is NH4Cl (ammonium chloride).

Ionic Bonding:

In NH4Cl, the bond between ammonium (NH4+) and chloride (Cl-) ions is primarily ionic.

Covalent Bonding:

Within the ammonium ion (NH4+), the bonds between nitrogen and hydrogen atoms are covalent.

Coordinate Covalent Bonding:

In NH4Cl, there is also a coordinate covalent bond between the ammonia (NH3) molecule and a proton (H+) from hydrochloric acid (HCl) that forms ammonium (NH4+)