Choose the correct statement: Graphite is the hardest while lamp black is softest, Diamond is the hardest and graphite is softest, Coal is the hardest and coke is softest, None of these
- Graphite is the hardest while lamp black is softest
- Diamond is the hardest and graphite is softest
- Coal is the hardest and coke is softest
- None of these
Explanation
Diamond has a 3D covalent network, making it the hardest natural substance.
Graphite has layered structures with weak forces between layers, making it soft and slippery.
Related MCQs
ڈفوین _____ کا عمل ہے؟
- Changing of liquid to gas state
- Intermixing of particles of different matters on their own
- Intermixing of particles of different matters with external sources
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
زمین کی فضا کی کس تہہ میں ہوائی جہاز پرواز کرتے ہیں؟
- Troposphere
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- Mesosphere
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برقی مقناطیسی قوت کی بہترین تعریف کیا ہے؟
- The force responsible for radioactive decay
- The attraction between any two heavy objects
- The force that acts between charged particles
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
دودھ سے ملائی الگ کرنے کے لیے عام طور پر کون سا طریقہ استعمال کیا جاتا ہے؟
- Distillation
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- None of these
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دوری جدول میں عناصر کو کس ترتیب سے رکھا گیا ہے؟
- Increasing atomic mass
- Decreasing atomic number
- Both A and B
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اس سوال کو وضاحت کے ساتھ پڑھیں
