Explanation

The Arrhenius theory (1887) defines:

Acids: Substances that dissociate in water to produce H⁺ ions (protons), such as:

HCl → H⁺ + Cl⁻

Bases: Substances that dissociate in water to produce OH⁻ ions (hydroxide ions), such as:

NaOH → Na⁺ + OH⁻

Explanation

The Pakistan Super League (PSL) is Pakistan's premier professional Twenty20 cricket league, established in 2015.

It features franchise-based teams (e.g., Karachi Kings, Lahore Qalandars) and attracts international players.

Islamabad United made history as the inaugural PSL champions in 2016.

Explanation

The correct sentence should be:

"We have complained to them so many times about the noise at night."

Verb Form Error:

"Complaint" is a noun (e.g., "file a complaint").

The verb form should be "complained" (past participle of "complain") to match the present perfect tense ("have complained").

Explanation

"Shaked" is incorrect; the past tense of "shake" is "shook."

Corrected sentence: "Houses shook like leaves when the earthquake hit the region."

Explanation

The CPU directly accesses RAM to fetch and execute instructions quickly.

RAM is volatile memory, meaning it temporarily stores data being used or processed.

Explanation

Interest = Principal × Rate × Time

= 250,000 × 0.12 × 4

= 250,000 × 0.48

= 120,000

Explanation

Talented means باصلاحیت

Incompetent means نااہل

Explanation

Atomic mass = number of protons + number of neutrons → 2 + 1 = 3.

Electrons do not contribute significantly to atomic mass.

Explanation

Meiosis reduces the chromosome number by half, forming haploid cells (e.g., gametes).

This ensures that during fertilization, the diploid number is restored in the offspring.

Explanation

"Mine" is a possessive pronoun that shows ownership.

It replaces a noun phrase like “my book” with a single word: mine.