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A Basic Oxide Will Be Formed by the Element: (A) K (B) S (C) P (D) Kr - Science

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प्रश्न

A basic oxide will be formed by the element:
(a) K
(b) S
(c) P
(d) Kr

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उत्तर

(a) K
Because K is a metal, its oxide K2O is a basic oxide.

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 3: Metals and Non-metals - Exercise 1 [पृष्ठ १३५]

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लखमीर सिंग Chemistry (Science) [English] Class 10
अध्याय 3 Metals and Non-metals
Exercise 1 | Q 69 | पृष्ठ १३५

संबंधित प्रश्न

.................... liberated when acetic acid reacts with sodium metal.
(a) Hydrogen
(b) Chlorine
(c) Oxygen
(d) Nitrogen


Iron is
(a) More reactive than zinc
(b) More reactive than aluminium
(c) Less reactive than copper
(d) Less reactive than aluminium


‘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’.


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


The reaction of an iron nail with copper sulphate solution is ........... reaction.

(a) Combination

(b) Displacement

(c) Double displacement

(d) Decomposition


From amongst the metals sodium, calcium aluminium, copper and magnesium, name the metal:
(i) which reacts with water only on boiling, and
(ii) another which does not react even with steam.


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.


Write equation for the reaction of magnesium with oxygen.


Complete and balance the following equation:

Na2O  +  H2O →


What happens when a rod of zinc metal is dipped into a solution of copper sulphate? Give chemical equation of the reaction involved.


Name two metals (other than zinc and iron) which can displace hydrogen from dilute hydrochloric acid?


What is the action of water on sodium ? Write equation of the chemical reaction involved.


You are given samples of three metals − sodium, magnesium and copper. Suggest any two activities to arrange them in order of their decreasing reactivities.


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


The elements whose oxides can turn phenolphthalein solution pink are:
(a) Na and K
(b) K and C
(c) Na and S
(d) K and P


An element X forms two oxides XO and XO2. The oxide XO has no action on litmus solution but oxide XO2 turns litmus solution red.
(a) What is the nature of oxide XO?
(b) What is the nature of oxide XO2?
(c) Would you call element X a metal or a non-metal? Give reason for your choice.
(d) Can you give an example of element like X?


The substance that will be flattened on beating with a hammer is ______.


Tungsten wire is used in electric bulbs.


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