मराठी

Name the metal which has been placed at the top of the reactivity series.

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प्रश्न

Name the metal which has been placed at the top of the reactivity series.

एक शब्द/वाक्यांश उत्तर
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उत्तर

Potassium (K)

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पाठ 3: Metals and Non-metals - Exercise 1 [पृष्ठ १६४]

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लखमीर सिंह Chemistry [English] Class 10
पाठ 3 Metals and Non-metals
Exercise 1 | Q 16. (b) | पृष्ठ १६४

संबंधित प्रश्‍न

Metal A has electronic configuration (2, 8, 1) and metal B has (2, 8, 8, 2). Which is more reactive? Why? Identify these metals.


‘E’ is an element which reacts with oxygen to form an oxide E2O. An aqueous solution of E2O turns red litmus blue, so:
i. What is the nature of oxide E2O ?
ii. Write the name of element ‘E’.


Write the electron-dot structures for sodium, oxygen and magnesium.


Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).


What name is given to those metal oxides which show basic as well as acidic behaviour?


Name the metal which has been placed at the bottom of the reactivity series.


Give reasons for the following:

Blue colour of copper sulphate solution is destroyed when iron filings are added to it.


Calcium is a ______ reactive metal than sodium.


What type of oxides are formed when non-metals react with oxygen? Explain with an example.


Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid.


What is meant by the reactivity series of metals? Arrange the following metals in an increasing order of their reactivities towards water:
Zinc, Iron, Magnesium, Sodium


Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why?


Name one metal which displaces copper from copper sulphate solution and one which does not.


Which of the following pair of reactants can undergo a displacement reaction under appropriate conditions?
(a) MgSO4 + Fe
(b) ZnSO4 + Fe
(c) MgSO4 + Pb
(d) CuSO4 + Fe


In nature, metal A is found in a free state while metal B is found in the form of its compounds. Which of these two will be nearer to the top of the activity series of metals?


Name a metal which It does not react with any physical state of water?


When calcium metal is added to water, the gas evolved does not catch fire but the same gas evolved on adding sodium metal to water catches fire. Why is it so?


Write a chemical equation to illustrate the use of aluminium for joining cracked railway lines.


Choose the correct alternative and rewrite the following:

Reaction of iron nails whith copper sulphate solution is an example of _____________________


Why is acidified water considered to be a good conductor of electricity?


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