The maximum number of electrons that can be associated with the quantum numbers n=3, l=1, m=-1 is: MCQ with Answer and Explanation

Explanation:
Reactivity series order: Na > Zn > Fe > Cu. Sodium (alkali metal) is extremely reactive, reacting violently with water. Copper is low in the series, hence used for water pipes.

Explanation:
A gel is a type of colloid where the dispersed phase is a liquid and the dispersed medium is a solid. Cheese, butter, and jellies are classic examples of gels. Milk is an emulsion (liquid in liquid), while fog and smoke are aerosols.

Explanation:
A positive catalyst increases reaction rate by lowering activation energy. Decreasing temperature generally slows reactions. Decreasing concentration reduces collision frequency, lowering rate. Larger pieces have less surface area, slower reaction. Other rate-increasing factors: increasing temperature, increasing pressure (for gases), using finely powdered solids, and light for photochemical reactions.