Islamabad is the federal capital of Pakistan. Karachi served as the country’s first capital after independence in 1947. The government later decided to develop a new planned capital near Rawalpindi. Islamabad gradually assumed the role of the national capital during the 1960s. The distinction between Karachi as the first capital and Islamabad as the present capital is commonly tested in general knowledge examinations.

Balochistan is Pakistan’s largest province by land area, covering a substantial part of the country’s southwest. Punjab has the largest population among the provinces, but land area and population are separate measures. This question tests an important distinction in Pakistan’s geography. A candidate should not confuse the largest province by area with the most populous province.

The Indus Valley Civilization takes its modern name from the Indus River region. Its prominent urban centers include Mohenjo-daro in present-day Sindh and Harappa in present-day Punjab. The civilization flourished during the Bronze Age and is known for planned cities, drainage systems and long-distance trade. The Indus River is also a major geographical feature of modern Pakistan.

Pakistan has a coastline along the Arabian Sea, which is part of the northern Indian Ocean. Important port cities include Karachi and Gwadar. The Arabian Sea connects Pakistan’s maritime trade with the wider Indian Ocean region. The Caspian Sea is landlocked and the Red Sea lies between northeast Africa and the Arabian Peninsula, so neither borders Pakistan.

Pakistan became independent on 14 August 1947, following the partition of British India. The year 1940 is associated with the Lahore Resolution, while 1956 is associated with Pakistan’s first constitution and transition to a republic. Competitive examinations frequently ask candidates to distinguish these milestones rather than treat them as the same event.

The plural of child is children, an irregular English plural. It does not follow the common rule of adding -s or -es to a singular noun. Other common irregular plurals include person/people and mouse/mice. The forms childs, childes and childrens are not standard plurals of child in ordinary English usage.

In the simple present tense, a third-person singular subject such as she normally takes the verb ending -s or -es in affirmative statements. Therefore, She goes to school daily is grammatical. The alternatives either omit the required agreement ending or use a verb form that does not form a complete simple-present sentence.

Rapid means fast or occurring at high speed. Swift is a close synonym in common usage. Slow expresses an opposite idea, while weak and late describe different qualities. In vocabulary MCQs, context can affect which synonym is best, but among these four alternatives swift is the clearest equivalent of rapid.

Ancient refers to something from the distant past. Modern describes something of more recent times or contemporary character, making it the best antonym among the choices. Old, historic and antique are all associated with age or the past, so they are not opposites of ancient in this context.

Since is used with a starting point in time, such as since 2020 or since Monday, when describing an action or state continuing into the present. For normally introduces a duration, such as for six years. In this present-perfect sentence, the year 2020 identifies when the period began, so since is the appropriate preposition.

A percentage means an amount per hundred. To calculate 15% of 200, multiply 200 by 15 and divide by 100. This gives 30. Another method is to find 10% of 200, which is 20, and 5%, which is 10, then add them. Percentages frequently appear in arithmetic and quantitative aptitude examinations.

The arithmetic mean is the sum of the values divided by the number of values. Here, 8 + 10 + 12 + 14 = 44. There are four numbers, so the average is 44 divided by 4, which equals 11. This calculation is distinct from the range, which is the maximum minus the minimum.

To solve the linear equation 3x + 5 = 20, subtract 5 from both sides to obtain 3x = 15. Then divide both sides by 3, giving x = 5. Substitute the result back into the original equation to verify: 3(5) + 5 = 20. Checking by substitution helps avoid arithmetic mistakes.

The expression 2 to the power of 5 means multiplying five factors of 2: 2 × 2 × 2 × 2 × 2. The product is 32. An exponent describes repeated multiplication, not multiplication of the base by the exponent. Thus 2 raised to the fifth power is different from 2 times 5.

Percentage increase is calculated using the original value as the base. The rise is 100 − 80 = 20. Dividing 20 by the original 80 gives 0.25, and multiplying by 100 gives 25%. Using the new value of 100 as the denominator would answer a different question, so always identify the initial value.

A keyboard is an input device used to enter characters, numbers and commands. A monitor and a printer are output devices, while a speaker produces audio output. Computer basics examinations often require candidates to classify common hardware as input, output, storage or processing components.

CPU stands for Central Processing Unit. It executes program instructions and performs arithmetic, logical and control operations as part of a computer system. The CPU works with memory and other hardware components; it should not be confused with the entire computer case or with storage devices such as a hard drive.

Mozilla Firefox is a web browser used to access websites and web applications. Microsoft Word is a word processor and Excel is a spreadsheet program. Windows Explorer, also called File Explorer in modern Windows, is mainly a file-management interface rather than a web browser.

HTTPS stands for Hypertext Transfer Protocol Secure. It uses TLS to protect communications between a browser and a website, helping provide encryption and server authentication. HTTP without TLS does not provide that transport protection. FTP is associated with file transfers, and SMTP is used for sending email.

RAM, or Random Access Memory, is generally volatile, meaning its contents are lost when power is removed. By contrast, ROM, solid-state drives and optical discs retain stored data without continuous power under normal conditions. RAM temporarily holds instructions and data that running programs need for fast access.

Nitrogen makes up approximately 78% of Earth’s dry atmosphere by volume. Oxygen accounts for roughly 21%, with argon and other gases making up most of the remainder. Carbon dioxide is present at a much smaller concentration. Remembering that nitrogen is more abundant than oxygen is useful for general science examinations.

Water has the chemical formula H2O, meaning each water molecule contains two hydrogen atoms and one oxygen atom. CO2 is carbon dioxide, O2 is molecular oxygen, and NaCl is sodium chloride or common table salt. Chemical formulas identify the types and ratios of atoms in substances.

The heart is a muscular organ that pumps blood through the circulatory system. Blood delivers oxygen and nutrients to tissues and transports carbon dioxide and other waste products. The lungs exchange gases, kidneys filter blood to produce urine, and the liver has many metabolic functions, but none of these is the main blood-pumping organ.

The SI base unit of electric current is the ampere, symbol A. Volt is a unit of electric potential difference, watt is a unit of power, and ohm is a unit of electrical resistance. Distinguishing electrical units is important because the underlying physical quantities are related but not interchangeable.

Photosynthesis is the process by which plants and other photosynthetic organisms use light energy to convert carbon dioxide and water into energy-rich organic compounds, releasing oxygen in oxygenic photosynthesis. Respiration releases usable energy from organic molecules, while evaporation and fermentation refer to different processes. Photosynthesis is central to food webs and the global carbon cycle.

A percentage is a part per hundred. To find 15% of 240, multiply 240 by 15 and divide the result by 100. The calculation gives 36. A useful alternative is to find 10% of 240, which is 24, then add 5%, which is 12. The total is 36.