Subject
Bank Exam
Topic
Joint Recruitment Test for 2 Banks (Officer)IT/ICT [04-01-2019, AUST]
[ Read the following questions carefully and choose the right answer. ]Which of the following metals is known to pollute the air of big cities with a large number of vehicles ?
[ Read the following questions carefully and choose the right answer. ]Which of the following metals is known to pollute the air of big cities with a large number of vehicles ?
ক)
Mercuryখ)
Ironগ)
Leadঘ)
CopperExplanation
Lead হচ্ছে ঈষৎ নীলাভ ধূসর ধাতু । lead এতো নরম যে ছুরি দিয়ে কাটা যায় । কাগজের উপর ঘষলে দাগ পড়ে । Lead এর নিম্নলিখিত ব্যবহার রয়েছেঃ • পানি সরবাহের নল ও মোটা গাড়ির ব্যাটারি তৈরিতে প্রচুর ব্যবহৃত হয় । • বুলেট, টাইপ ধাতু ও অন্যান্য ধাতু সঙ্কর তৈরিতে ব্যবহৃত হয় । • ক্রোম হলুদ রং , পেট্রোলের এন্টিনক ইত্যাদি তৈরিতে ব্যবহৃত হয় ।Related questions
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