FFC CHEMICAL PLANT OPERATOR PAST PAPER 30-07-2025
FFC 5 years
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
- Focus
- Reward
- Prize
- Both B and C
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Punish means سزا
Prize means انعام
Reward means انعام
- Cooled wax
- True solid
- Super cooled liquid
- None of these
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Explanation
Glass is amorphous.
It lacks a definite crystalline structure.
It behaves like a supercooled liquid, flowing extremely slowly over time.
گیس کا مثالی مساوات کیا ہے؟
- PV=nRT
- 𝑃 𝑉 = 𝑑 𝑅 𝑇
- 𝐷 = 𝑉 𝑀
- Both A and B
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Explanation
PV=nRT is the standard form of the ideal gas law, where:
PV=dRT is a derived form of the ideal gas equation when you use density d instead of moles n (using , where M is molar mass).
سب سے مستحکم نیوکللی امتزاج سے حاصل کیا جاتا ہے؟
- Even N and odd Z
- Even N and even Z
- Odd N and odd Z
- None of these
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Explanation
N = number of neutrons, Z = number of protons.
Nuclei with even numbers of protons and neutrons are more stable due to pairing effects.
Such nuclei have higher binding energy and lower radioactivity.
ایتھیلین انو _____ پر مشتمل ہے؟
- Five sigma and one pi bond
- One sigma and two pi bonds
- One sigma and three pi bonds
- None of these
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Explanation
The ethylene molecule (C₂H₄) contains five sigma bonds and one pi bond.Each C-H bond is a sigma bond (4 in total).
The C-C bond consists of one sigma bond and one pi bond.
سطح کے تناؤ کی اکائی _____ ہے؟
- N/m-¹
- Joule-¹
- Nm-¹
- None of these
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Explanation
Surface tension is the force per unit length along a liquid surface.
SI unit: Newton per meter (N/m or Nm⁻¹).
- Concentration
- Temperature
- Catalyst
- None of these
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Explanation
A catalyst speeds up the reaction but does not affect the equilibrium position.
Concentration, temperature, and pressure can shift the equilibrium, but the equilibrium constant remains unchanged by a catalyst.
ہیبر کے عمل کے بجائے ، ______ عمل کو نائٹروجن کو امونیا میں تبدیل کرنے کے لئے بھی استعمال کیا جاسکتا ہے۔
- Contact
- Cyanamide
- Ostwald
- None of these
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Explanation
The Cyanamide process can also convert nitrogen (N₂) to ammonia (NH₃).
Calcium cyanamide reacts with water to produce ammonia: CaCN2 + 3H2O → CaCO3 + 2NH3
نظام کی گرمی کا مواد _____ کے نام سے جانا جاتا ہے؟
- Work
- Enthalpy
- Free energy
- None of these
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Explanation
Enthalpy (H) is the total heat content of a system at constant pressure.
It represents the energy required to create the system and do work on its surroundings.
نوبل گیسوں کے بارے میں کون سا بیان درست ہے؟
- They are also known as halogens
- Their oxidation state is zero
- They react easily with alkali metals
- None of these
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Explanation
Noble gases are chemically inert and generally do not form compounds.
Hence, their oxidation state is 0 in elemental form.
