Applied Sciences HSSC-I Past Paper Solved | Bilingual (English + Urdu) | For Dispenser, MLT, OTT,FBISE,PMF

 Introduction: This is the bilingual (English + Roman Urdu) explanation of the Applied Sciences HSSC-I paper (Section B and Section C), written in Easy , Urdu And English , and student-friendly format.Ta k Har Trha ka student ya teacher asani sy smajh saky har concept dia gea ha.

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✅ Applied Sciences HSSC-I Solved Paper (Bilingual) | Past Paper | FBISE, PMF, PNC

📚 Subject: Applied Sciences
🎓 Class: HSSC-I (11th)
📅 Year: Past Paper
🎯 Format: Solved in English and Roman Urdu
✅ Best for: Dispenser, MLT, OTT, Nursing, LHV & Allied Health Students,FBISE,PMF

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🔹 Section B (Marks: 26) – Attempt Any 13 Parts

Q2 (i) What is Force?

English: Force is a push or pull acting upon an object that causes it to move or stop. Its unit is Newton (N).
Roman Urdu: Force aik aesi taqat hai jo kisi cheez ko dhakelti ya kheenchti hai jisse woh hilti ya rukti hai. Iski unit Newton hai.

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(ii) Differentiate between mass and weight.

English:

• Mass is the amount of matter in a body and is measured in kilograms (kg).

• Weight is the force with which gravity pulls a body and is measured in newtons (N).
  Roman Urdu:

• Mass aik jism ka madah hota hai, iski unit kilogram hai.

• Weight zameen ki gravity ka asar hota hai jo kisi jism ko neeche kheenchta hai, iski unit Newton hai.

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(iii) What is Density? Also write its unit.

English: Density is the mass per unit volume of a substance. Its unit is kg/m³.
Roman Urdu: Density ka matlab hai kisi madah ka aik unit volume mein mass. Iski unit kg/m³ hai.

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(iv) What is Pressure?

English: Pressure is the force applied per unit area. Its unit is Pascal (Pa).
Roman Urdu: Pressure ka matlab hai aik specific area par lagayi gayi force. Iski unit Pascal hai.

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(v) Convert 98.6°F into Celsius scale.

English:
Formula: °C = (°F − 32) × 5/9
°C = (98.6 − 32) × 5/9 = 37°C
Roman Urdu:
Formula: °C = (°F − 32) × 5/9
°C = (98.6 − 32) × 5/9 = 37°C

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(vi) Define Transparent, Translucent, and Opaque Objects.

English:

• Transparent: Allow all light (e.g., glass)

• Translucent: Allow some light (e.g., frosted glass)

• Opaque: Allow no light (e.g., wood)
  Roman Urdu:

• Transparent: Jo poori roshni guzarne dein (jaise sheesha)

• Translucent: Thodi roshni guzarne dein (jaise dhundla glass)

• Opaque: Roshni guzarne na dein (jaise lakri)

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(vii) Define frequency and wavelength and write their units.

English:

• Frequency is the number of waves per second (Unit: Hertz – Hz)

• Wavelength is the distance between two crests (Unit: meter – m)
  Roman Urdu:

• Frequency aik second mein kitni waves guzarti hain (Unit: Hz)

• Wavelength do lehron ke darmiyan ka faasla (Unit: meter)

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(viii) What is Static Electricity?

English: Static electricity is the imbalance of electric charges on the surface of an object.
Roman Urdu: Static electricity woh bijli hai jo kisi cheez ki satah par jama ho jaati hai.

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(ix) Write the relation between potential difference, current, and resistance.

English:
Ohm’s Law: V = I × R
(V = voltage, I = current, R = resistance)
Roman Urdu:
Ohm’s Law: V = I × R
Jahan V hai voltage, I hai current, R hai resistance

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(x) Differentiate element, mixture, and compound.

English:

• Element: Pure substance with one type of atom

• Mixture: Two or more substances mixed, not chemically combined

• Compound: Chemically combined substances
  Roman Urdu:

• Element: Aik hi type ka atom hota hai

• Mixture: Do ya zyada cheezein mila kar bina chemical taur par combine kiye

• Compound: Cheezein chemically combine hoti hain

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(xi) Enlist 6 chemicals and their chemical formulae.

English:

1. Water – H₂O

2. Carbon dioxide – CO₂

3. Oxygen – O₂

4. Sodium chloride – NaCl

5. Glucose – C₆H₁₂O₆

6. Ammonia – NH₃
   Roman Urdu:

7. Pani – H₂O

8. Carbon dioxide – CO₂

9. Oxygen – O₂

10. Namak – NaCl

11. Glucose – C₆H₁₂O₆

12. Ammonia – NH₃

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(xii) Write a short note on ‘Need of Water for Human Body’.

English: Water helps in digestion, circulation, and removing waste from the body.
Roman Urdu: Pani hazme, khoon ke gardish aur body se zehr nikalne mein madad karta hai.

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(xiii) Write physical and chemical properties of acids.

English:

• Physical: Sour taste, turns blue litmus red

• Chemical: Reacts with bases and metals
  Roman Urdu:

• Physical: Khatta taste, blue litmus ko red karta hai

• Chemical: Base aur metals ke sath react karta hai

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(xiv) Write a short note on pH scale.

English: pH scale measures the acidity or alkalinity of a solution, ranging from 0 to 14.
Roman Urdu: pH scale aik solution ki acid ya base hone ki scale hai, jiska range 0 se 14 hota hai.

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(xv) Enlist importance of ions in the human body.

English: Ions help in nerve function, muscle contraction, and fluid balance.
Roman Urdu: Ions nerves ke kaam, pathon ke sikudne aur body fluids ko balance rakhne mein madad karte hain.

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(xvi) What is radioactivity?

English: Radioactivity is the emission of radiation from unstable atomic nuclei.
Roman Urdu: Radioactivity woh process hai jahan unstable atom radiation nikalta hai.

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(xvii) Write physiologically active proteins.

English: Enzymes, hormones, and antibodies are active proteins in the body.
Roman Urdu: Enzymes, hormones aur antibodies body mein physiological activity karti hain.

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🔹 Section C (Marks: 14) – Attempt Any Two Questions

Q3. Write a detailed note on atomic structure.

English:
Atom is the smallest unit of matter. It consists of:

• Protons (+): Positive charge, present in nucleus

• Neutrons (0): No charge, present in nucleus

• Electrons (-): Negative charge, orbit around nucleus
  Atoms combine to form molecules. Atomic number = protons; Mass number = protons + neutrons.

Roman Urdu:
Atom madah ka sab se chhota hissa hota hai. Yeh 3 parts se mil kar bana hota hai:

• Proton (+): Positive charge wala, nucleus mein hota hai

• Neutron (0): Koi charge nahi hota, nucleus mein hota hai

• Electron (-): Negative charge wala, nucleus ke ird gird ghoomta hai
  Atoms mil kar molecule banate hain. Atomic number = protons; Mass number = protons + neutrons.

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Q4. What is friction? Write advantages and disadvantages of friction.

English:
Friction is a force that opposes motion between two surfaces.
Advantages:

• Helps in walking

• Stops vehicles
  Disadvantages:

• Wears out machine parts

• Produces heat

Roman Urdu:
Friction woh force hai jo do cheezon ke darmiyan hilne ko rokta hai.
Faide:

• Chalne mein madad

• Gaari rokne mein madad
  Nuksan:

• Machines ghis jaati hain

• Heat produce hoti hai

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Q5. Explain the characteristics of sound in detail.

English:
Sound is a wave that travels through air. Its characteristics:

• Pitch: High or low sound

• Loudness: Volume of sound

• Frequency: Number of waves/sec

• Wavelength: Distance between waves

• Speed: Depends on medium

Roman Urdu:
Awaz aik lehr hai jo hawa ke zariye travel karti hai. Iski khasoosiyat:

• Pitch: Awaz buland ya dheemi

• Loudness: Awaz ki volume

• Frequency: Aik second mein kitni lehrain

• Wavelength: Do lehron ka faasla

• Speed: Kis medium mein travel kar rahi hai

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