Question : Brass is an alloy of
Option 1: lead and tin
Option 2: zinc and copper
Option 3: antimony, tin and lead
Option 4: zinc, tin and copper
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Correct Answer: zinc and copper
Solution : The correct answer is zinc and copper .
Brass is an alloy of copper and zinc. It is generally made by mixing 80% copper with 20% zinc. It has several benefits over copper metal like it is not prone to corrosion, and it has more hardness and strength. It is used for making decorative items, heavy utility machinery, musical instruments, etc. It is also used for making locks, hinges, ball bearings, ammunition, valves, electric plug sockets, etc.
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Question : 135 kg of alloy A is mixed with 72 kg of alloy B to get a new alloy. If alloy A has zinc and copper in the ratio 4 : 5 and alloy B has zinc and copper in the ratio 7 : 5, then what is the weight of zinc in the new alloy?
Question : Alloy X contains 70% copper and 30% zinc. Alloy Y contains 40% copper, 25% zine and 35% aluminium Alloy X and Y are mixed in the ratio of 1 : 3. What is the ratio of copper and zine in the newly formed alloy?
Question : The ratio of copper and zinc in brass is 7 : 3. How much amount of copper will be there in 200 kg of brass?
Question : An alloy contains copper, zinc, and nickel in the ratio of 3 : 2 : 5 respectively. What quantity of nickel (in kg) must be added to 100 kg of this alloy to have the new ratio of copper, zinc, and nickel 3 : 2 : 6 respectively?
Question : Which of the following metals occurs in a free state?
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