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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Name a Metal As Precious as Gold - Chemistry

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प्रश्न

Name a metal as precious as gold  

एक शब्द/वाक्यांश उत्तर

उत्तर

Platinum

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पाठ 6: Metals and Non-metals - Exercise

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सेलिना Concise Chemistry [English] Class 7 ICSE
पाठ 6 Metals and Non-metals
Exercise | Q 1.3

संबंधित प्रश्‍न

Mark ‘T’ if the statement is true and ‘F’ if it is false.

Coal can be drawn into wires. ( )


Name the gas that is produced in the given case:

The reaction of ethanol and sodium.


Name the most abundant non-metal in the earth's crust.


State one use of Sulphur.


You are given a dry cell, a torch bulb with holder, wires and crocodile clips. How would you use them to distinguish between samples of metals and non-metals?


The electronic configurations of three elements X, Y and Z are:

X : 2 Y : 2, 8, 7 Z : 2, 8, 2

Which of the following is correct regarding these elements?
(a) X is a metal
(b) Y is a metal
(c) Z is a non-metal
(d) Y is a non-metal and Z is a metal


Give reasons 

Tungsten is used in electric bulbs. 


Name a metal which is poor conductor of electricity :   


State two important uses of following non-metal 

Uses of chlorine  


Name:

a metal which can be cut with a knife.


`Mg +H_2SO_4 → —+ — `


Name:

a metal which is brittle


Give the balanced reactions for the following:

Iron reacts with dilute HCI


Identify the odd term.


A metallic oxide which cannot be reduced by normal reducing agents:


Geeta dipped a copper coin in a solution of silver nitrate. After some time she saw the silver shine on the coin. Why? Give the balanced chemical equation for the same and name the type of reaction.

Explain the following:

Metals like calcium and magnesium are never found in their free state in nature.


Give reason for the following:

Rusting reduces the structural strength of iron.


Which of the following non-metals is a liquid?


The metal is stored in kerosene ______.


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