BPSC EVERYDAY SCIENCE 25 YEARS PAST PAPERS
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
قدرتی گیس اپنی خالص حالت میں بے بو ہوتی ہے، اس لیے کیا کیا جاتا ہے؟
- Is not usable
- Needs odorant for detection
- Needs color addition
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Natural gas is a widely used energy source.
- In its pure form, it has no smell (odorless).
- This makes it difficult to detect leaks.
- For safety, special substances are added to it.
- These substances help people smell gas leakage easily.
Last verified on 14-05-2026
پودوں اور جانوروں کے فضلے سے براہِ راست حاصل ہونے والا توانائی کا ذریعہ کون سا ہے؟
- Wind
- Hydro
- Biomass
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Plant and animal waste can be converted into useful fuel is called biomass.
- It is produced from organic waste.
- It includes crop residue, wood, dung, and animal waste.
Last verified on 14-05-2026
سیل کے کس حصے میں جینیاتی مواد موجود ہوتا ہے؟
- Ribosome
- Cytoplasm
- Nucleus
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- A cell is the basic unit of life.
- Different parts of the cell have different functions.
- Genetic material controls heredity and traits.
- It is mainly found in a specific control center of the cell.
- This control center is called the nucleus.
Last verified on 14-05-2026
انسانی جسم کے لیے فوری توانائی کا سب سے بڑا ذریعہ کون سا ہے؟
- Carbohydrates
- Mineral
- Vitamin
- Protein
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Explanation
- Carbohydrates are the fastest and main source of energy.
- They are quickly converted into glucose in the body.
- Glucose is used immediately for energy production.
- They provide instant fuel for brain and muscles.
Last verified on 14-05-2026
لیزر بیمز مواصلات میں کیوں استعمال کی جاتی ہیں؟
- Are invisible
- Have low intensity
- Travel in straight narrow paths
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Laser light is a special type of light used in modern communication systems.
- It is highly focused and very powerful.
- Communication systems need signals that travel long distances with accuracy.
- Laser beams do not spread much like normal light.
- That is why they are ideal for communication.
Last verified on 14-05-2026
ایک عنصر کے آاسوٹوپس میں کس کی ایک ہی تعداد ہے؟
- Neutrons
- Protons
- Electrons
- Beta rays
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Isotopes of an element have the same number of protons.
- They differ in number of neutrons, which changes mass number.
- Chemical properties remain almost the same due to same protons.
Last verified on 14-05-2026
کون سی شعاع مقناطیسی میدان سے سب سے کم متاثر ہوتی ہے؟
- Alpha
- Gamma
- Beta
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Radiation in nuclear physics includes alpha, beta, and gamma rays.
- Charged particles are deflected by magnetic fields.
- Alpha and beta rays carry positive or negative charge.
- Gamma rays are neutral electromagnetic waves.
- Therefore, gamma rays are least affected by magnetic fields.
Last verified on 14-05-2026
ایک ایٹم کا ماس نمبر _____ ظاہر کرتا ہے؟
- Numbers of protons
- Number of electrons
- Number of proton and neutron
- Number of proton and electrons
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Atoms are made of subatomic particles: protons, neutrons, and electrons.
- Mass number represents the total number of heavy particles in nucleus.
- Only protons and neutrons contribute to atomic mass.
Last verified on 14-05-2026
کون سا توانائی کا ذریعہ موسم پر انحصار کی وجہ سے غیر قابلِ اعتماد سمجھا جاتا ہے؟
- Coal
- Wind energy
- Natural gas
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Wind energy depends on the speed and consistency of wind.
- If wind is low or stops, electricity generation decreases or stops.
- That’s why it is considered unreliable compared to fossil fuels.
Last verified on 14-05-2026
کوانٹم نظریہ کے مطابق توانائی کے اخراج اور جذب کے بارے میں بنیادی خیال کیا ہے؟
- Energy is exchanged in definite small packets
- Energy has no relation to radiation
- Energy changes only continuously
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Quantum theory states that energy is emitted and absorbed in fixed small packets called quanta.
- These packets are not continuous but exist in discrete amounts.
- This concept was introduced by Max Planck.
Last verified on 13-05-2026
