मराठी
महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

Atomic number of aluminium is _______ and its electronic configuration is _______.

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प्रश्न

Atomic number of aluminium is _______ and its electronic configuration is _______.

पर्याय

  • 13, (2, 8, 3)

  • 12, (2, 8, 2)

  • 13, (3, 10)

  • 12, (2, 10)

MCQ
रिकाम्या जागा भरा
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उत्तर

Atomic number of aluminium is 13 and its electronic configuration is (2, 8, 3).

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 8: Metallugy - Choose the correct option.

संबंधित प्रश्‍न

Metallic oxides of zinc, magnesium and copper were heated with the following metals.

Metal Zinc Magnesium Copper
Zinc oxide
Magnesium oxide
Copper oxide

In which cases will you find displacement reactions taking place?


A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped in a particular solution. The bangles sparkled like new but their weight was reduced drastically. The lady was upset, but after a futile argument, the man beat a hasty retreat. Can you play the detective to find out the nature of the solution he had used?


Name a reducing agent that may be used to obtain manganese from manganese dioxide.


Which metal becomes black in the presence of hydrogen sulphide gas in air?


Name one metal which is extracted by:

Reduction with aluminium.


Give the name and chemical formula of one ore of copper.


Explain giving one example, how highly reactive metals (which are high up in the reactivity series) are extracted.


What iron compound is present in haematite ore? Also write its chemical formula.


A black metal oxide XO2 is used as a catalyst in the preparation of oxygen gas from potassium chlorate. The oxide XO2 is also used in ordinary dry cells. The metal oxide XO2 cannot be reduced satisfactorily with carbon to form metal X.

  1. Name the metal X.
  2. Name the metal oxide XO2.
  3. Which reducing agent can be used to reduce XO2 to obtain metal X?
  4. Name another metal which can also be extracted by the reduction of its oxide with the above reducing agent.

Give the principles of electromagnetic separation.


Aluminum is used in thermite welding:

write reaction for process?


Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.


Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.


Define roasting.


Carbon cannot reduce the oxides of sodium, magnesium, and aluminum to their respective metals. Why? Where are these metals placed in the reactivity series? How are these metals obtained from their ores? Take an example to explain the process of extraction along with chemical equations.


In the electrolytic method, a layer of highly active metal is applied to a less active metal.


Identify who I am!

Ore of Aluminum- ______


Explain the following reaction with the balanced equation.

Zinc sulphide is heated strongly in excess of air


Explain concept with example/explain with the help of a balanced equation.

Roasting


Observe the figure and answer the following.

  1. Write the name of the method.
  2. What is used as anode and cathode in this method?
  3. Write the molecular formula and use of cryolite.
  4. Write anode reaction.
  5. Write cathode reaction.

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