Economic importance of nickel
Ni
rechargeable Ni-Cd batteries; Ni-steel alloys that are hard and resist rust and acids; Ni-Cr alloys for heating coils and electric furnaces (resist corrosion at high temperature); nickel plating protects other metals and gives them a nice look; finely divided Ni is a catalyst for hydrogenation of oils.
The idea, in English
Ni
rechargeable Ni-Cd batteries; Ni-steel alloys that are hard and resist rust and acids; Ni-Cr alloys for heating coils and electric furnaces (resist corrosion at high temperature); nickel plating protects other metals and gives them a nice look; finely divided Ni is a catalyst for hydrogenation of oils.
Explain in Egyptian Arabic
استخدامات الـ Ni
بطاريات الـ Ni-Cd اللي بتتشحن تاني؛ الـ Ni-steel alloys اللي بتبقى hard وبتقاوم الـ rust والـ acids؛ الـ Ni-Cr alloys في ملفات التسخين (heating coils) والأفران الكهربا (electric furnaces) عشان بتقاوم الـ corrosion في درجات الحرارة العالية؛ الطلي بالـ nickel (nickel plating) بيحمي الـ metals التانية وبيدّيها شكل حلو؛ والـ finely divided Ni بيشتغل catalyst في الـ hydrogenation of oils.
Common misconceptions
- Ni-Cr coils are chosen because they conduct well.
The book's reason is resistance to corrosion at high temperature.
Explain in Egyptian Arabic
لأ، ده مش سبب الكتاب؛ الكتاب بيقول إنها بتتختار عشان بتقاوم الـ corrosion في درجات الحرارة العالية.
- A lump of nickel catalyses as well as finely divided nickel.
No. The catalysis happens at the metal's surface, and finely divided nickel has a much larger surface than one lump of the same mass, so it touches more oil and hydrogen and works better as a catalyst.
Explain in Egyptian Arabic
لأ، التفاعل بيحصل على السطح؛ والـ finely divided nickel مساحة سطحه أكبر بكتير من حتة واحدة ليها نفس الكتلة، فبيلمس الزيت والـ hydrogen أكتر وبيشتغل catalyst أحسن.