मराठी

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

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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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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 3: Metals and Non-metals - Exercise 1 [पृष्ठ १३५]

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लखमीर सिंह Chemistry [English] Class 10
पाठ 3 Metals and Non-metals
Exercise 1 | Q 69 | पृष्ठ १३५

संबंधित प्रश्‍न

‘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 chemical reaction when iron reacts with dilute H2SO4.


Food cans are coated with tin and not with zinc because ______.


State whether the following statement is true or false:
Non-metals react with dilute acids to produce a gas which burns with a 'pop' sound.


A copper coin is kept immersed in a solution of silver nitrate for some time. What will happen to the coin and the colour of the solution?


Which of the following elements would yield a neutral oxide?

Na, S, C, K, H


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


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


Write the equation for the reaction of Zinc with dilute hydrochloric acid.

Name the products formed. Also indicate the physical states of all the substances involved.


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


You are given a solution of AgNO3. Which of the following do you think cannot displace Ag from AgNO3solution?
(a) Magnesium
(b) Zinc
(c) Gold
(d) Copper


The least reactive metal among the following is:
(a) sodium
(b) silver
(c) copper
(d) lead


Out of the following oxides, the amphoteric oxide is:
(a) Fe2O3
(b) Al2O3
(c) P2O5
(d) N2O


The elements whose oxides can turn litmus solution blue are:
(a) carbon and sulphur
(b) sodium and carbon
(c) potassium and magnesium
(d) magnesium and sulphur


Metal A burns in air, on heating, to form an oxide A2O3 whereas another metal B burns in air only on strong heating to form an oxide BO. The two oxides A2O3 and BO can react with hydrochloric acid as well as sodium hydroxide solution to form the corresponding salts and water.
(a) What is the nature of oxide A2O3?
(b) What is the nature of oxide BO?
(c) Name one metal like A.
(b) Name one metal like B.


State and explain the reaction, if any, of the following metals with a solution of copper sulphate:
(a) Gold
(b) Copper
(c) Zinc
(d) Mercury


If A, B, C, D, E, F, G, H, I, J and K represent metals in the decreasing order of their reactivity, which one of them is most likely to occur in a free state in nature?


Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?

  1. Good thermal conductivity
  2. Good electrical conductivity
  3. Ductility
  4.  High melting point

Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?


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