General Science Class 7 MCQs MCQs - General Science Practice | PakExamPoint
Practise General Science Class 7 MCQs MCQs in General Science. Attempt multiple-choice questions, check answers and revise related subtopics.
General Science Class 7 MCQs MCQs and revision practice
Study General Science Class 7 MCQs through multiple-choice questions in General Science. This subtopic contains 255 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
Use these General Science Class 7 MCQs MCQs to identify the facts, rules or methods you need to revise. Where an explanation is available, work through it and write down why your chosen option was correct or incorrect. Revisit difficult questions after reviewing your notes, then use exam mode for timed practice.
Explanation Only about 2.5% (3%) of the water on Earth is freshwater , which is vital for human consumption, agriculture, and ecosystem health. The remaining 97.5% (97%) is saltwater , found in oceans, seas, and salt lakes.
مندرجہ ذیل میں سے کون سی کیمیائی تبدیلی کی علامت نہیں ہے؟
A. Change in colour, temperature, smell
B. A release of gas
C. No change in composition
D. Production of a new material
Check answer and explanation
Answer: No change in composition
Explanation The correct answer is: No change in composition A chemical change involves a transformation of one or more substances into new substances, which means a change in composition. The signs of chemical change : Release of gas Change in color Change in temperature Change in smell Production of a new material
کون سا فارمولہ مدار میں موجود الیکٹرانوں کی زیادہ سے زیادہ تعداد کے تعین میں مدد کرتا ہے؟
A. 2n^2
B. n^2
C. 2n
D. n/2
Check answer and explanation
Answer: 2n^2
Explanation The formula 2n^2 helps in determining the maximum number of electrons present in an orbit, where n is the principal quantum number (energy level). This formula is based on the Aufbau principle and the Pauli exclusion principle, which describe how electrons occupy energy levels in an atom.
کس جرگ میں، ایک پھول کے اینتھر سے بالغ جرگ کے دانے اسی قسم کے دوسرے پودے کے پھول کے داغ میں منتقل ہوتے ہیں؟
A. Self Pollination
B. Artificial Pollination
C. Cross Pollination
D. Hybrid Pollination
Check answer and explanation
Answer: Cross Pollination
Explanation Cross-Pollination is the transfer of mature pollen grains from the anther of one flower to the stigma of a flower on another plant of the same or different species. This means that the pollen is transferred between different plants, allowing for genetic diversity and increased fertility.
Explanation Frequency is the number of occurrences of a repeating event per unit of time. SI unit hertz (Hz) In SI base units: s−1 Derivations from other quantities: f = 1 / T Dimension T^ − 1 ***
Explanation Light year refers to speed of light expressed in miles per year (it is about ten trillion kilometers or six trillion miles ). Light year is a unit of distance . Light Year: the distance that light can travel in one year. The distance light travels in one year is known as the light year. 1 light year is equal to 9.5 x 10^12 km ND11-07-2023
مندرجہ ذیل میں سے کون سا راستے کے طور پر کام کرتا ہے اور خوراک کو گلے سے معدے تک پہنچاتا ہے؟
A. Small intestine
B. Oesophagus
C. Trachea
D. Mouth
Check answer and explanation
Answer: Oesophagus
Explanation The oesophagus (also known as the esophagus) is a muscular tube that acts as a pathway to transport food from the pharynx (throat) to the stomach. It uses peristalsis (wave-like muscle contractions) to move the food bolus into the stomach.
ہضم نہ ہونے والا کھانا ____ کے ذریعے انسانی جسم سے خارج ہوتا ہے؟
A. Oesophagus
B. Large Intestine
C. Small intestine
D. Stomach
Check answer and explanation
Answer: Large Intestine
Explanation The large intestine , also known as the colon, is responsible for: Water absorption Electrolyte balance Fiber fermentation Storage and elimination of undigested food (feces)
Explanation The oesophagus is a muscular tube that connects the pharynx (throat) to the stomach. Its main function is to transport food from the pharynx to the stomach through peristalsis (wave-like muscle contractions).
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