Chemistry (Physical, Organic & Inorganic) MCQs with Answers & Explanations
Chemical bonding, periodic trends, thermodynamics, reaction kinetics, organic reaction mechanisms, polymers, and environmental chemistry for lecturer and scientific cadre tests.
High-Yield Examination Topics for Chemistry (Physical, Organic & Inorganic)
Featured Practice Questions
Solve with authoritative answers and syllabus rationale.
Under which Constitution was Pakistan officially declared as an "Islamic Republic" for the first time?
Detailed Explanation & Reference:
The 1956 Constitution, enacted on 23 March 1956, was Pakistan's first constitution and officially designated the state as the "Islamic Republic of Pakistan". The 1962 Constitution initially omitted "Islamic" but restored it through the First Constitutional Amendment, while the 1973 Constitution reaffirmed and strengthened Islamic provisions.
In which year did the All India Muslim League pass the historic Lahore Resolution (later known as the Pakistan Resolution)?
Detailed Explanation & Reference:
The Lahore Resolution was moved by A. K. Fazlul Huq, the Premier of Bengal, and adopted at the 27th annual session of the All India Muslim League at Minto Park, Lahore, on 23 March 1940. It demanded autonomous sovereign units for Muslim-majority regions.
Which mountain pass connects Pakistan with China through the Karakoram Range?
Detailed Explanation & Reference:
Khunjerab Pass is situated at an elevation of approximately 4,693 meters (15,397 feet) in the Karakoram Mountains and serves as the highest paved international border crossing in the world, linking Gilgit-Baltistan with Xinjiang, China via the Karakoram Highway (N-35).
Which is the oldest operational barrage built across the Indus River in Sindh, inaugurated in 1932?
Detailed Explanation & Reference:
The Sukkur Barrage (originally named Lloyd Barrage) was commissioned in 1932 during British rule. It is the backbone of Sindh's canal network, commanding millions of acres of fertile agricultural land.
Gwadar Port officially became part of Pakistan in 1958 after being purchased from which country?
Detailed Explanation & Reference:
Gwadar was under the possession of the Sultanate of Oman from 1783 until Pakistan formally purchased it on 8 September 1958 for 3 million USD (approx. 5.5 billion Omani Rials) under the leadership of Prime Minister Feroz Khan Noon.