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Metals: Properties, Extraction, and Applications

Questions about properties of metals, their reactivity, extraction processes, alloys, and practical applications

17 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following statements is incorrect?

  1. Metals have lustre.
  2. All metal oxides are basic in nature.
  3. Metals have 1, 2 or 3 electrons in the outermost shell.
  4. Metals are malleable.
Question 2 Multiple Choice (Single Answer)

Which of the following elements will not liberate hydrogen gas on its treatment with dilute HCI?

  1. Zn
  2. Fe
  3. Cu
  4. Al
Question 3 Multiple Choice (Single Answer)

The Government of India has totally banned the export of 'Burnt Coal' (Jhama) because it contains recoverable amount of a metal element used in transistors. Which of the following is the element?

  1. Phosphorus
  2. Germanium
  3. Silicon
  4. Tungsten
Question 4 Multiple Choice (Single Answer)

The filament of an electric bulb is made of

  1. tungsten
  2. nichrome
  3. iron
  4. carbon
Question 5 Multiple Choice (Single Answer)

On increasing the temperature, the conduction in metallic conductors

  1. increases
  2. decreases
  3. remains constant
  4. first increases, then becomes constant
Question 6 Multiple Choice (Single Answer)

Which of the following metals liberates hydrogen from cold water?

  1. Iron
  2. Sodium
  3. Magnesium
  4. Zinc
Question 7 Multiple Choice (Single Answer)

The function of adding cryolite in the extraction of aluminium from pure alumina is

  1. to decrease the fusion temperature
  2. to increase the conductivity of alumina
  3. to decrease the fusion temperature and increase the electrical conductivity
  4. None of these
Question 8 Multiple Choice (Single Answer)

Which of the following burns in nitrogen gas?

  1. Copper
  2. Magnesium
  3. Zinc
  4. Iron
Question 9 Multiple Choice (Single Answer)

Coloured glass for goggles contains

  1. ferrous oxide
  2. nickel oxide
  3. ferric oxide
  4. lanthanum oxide
Question 10 Multiple Choice (Single Answer)

Argentite is an ore of

  1. copper
  2. silver
  3. platinum
  4. gold
Question 11 Multiple Choice (Single Answer)

Gold is soluble in

  1. hydrochloric acid
  2. hydrogen fluoride
  3. hydrogen bromide
  4. aqua regia
Question 12 Multiple Choice (Single Answer)

The purest form of iron is

  1. wrought iron
  2. steel
  3. pig iron
  4. cast iron
Question 13 Multiple Choice (Single Answer)

Amalgams are the alloys, which always contain

  1. zinc
  2. aluminium
  3. tin
  4. mercury
Question 14 Multiple Choice (Single Answer)

German silver is an alloy of

  1. copper, zinc and silver
  2. gold and zinc
  3. gold and silver
  4. copper, zinc and nickel
Question 15 Multiple Choice (Single Answer)

Stainless steel usually contains about 15% of

  1. carbon
  2. chromium
  3. manganese
  4. nickel
Question 16 Multiple Choice (Single Answer)

Which of the following is the reference electrode made from?

  1. ZnCI
  2. Hg2CI2
  3. CuSO4
  4. HgCI2
Question 17 Multiple Choice (Single Answer)

Which of the following properties differentiates metals from non-metals?

  1. Non-metals form halides on reacting with halogens.
  2. Non-metals form oxides.
  3. Non-metals form hydrides on reacting with hydrogen.
  4. Non-metals do not replace hydrogen from acids.
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