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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Mention Two Uses of the Following Metals and Non-metals Iodine

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प्रश्न

Mention two uses of the following metals and non-metals 

Iodine    

एका वाक्यात उत्तर
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उत्तर

It is used in photographic films in the form of potassium iodide.
It is added to salt to make it iodized salt which is necessary for the growth of human body.

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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 3.5

संबंधित प्रश्‍न

Give reasons for the following.

Copper cannot displace zinc from its salt solution.


Which property of graphite is utilised in making electrodes?


Give the composition of an alloy called solder. State its one property and one use.


What is a thermite reaction? Explain with the help of an equation. State one use of this reaction.


How does the electrical conductivity of copper alloys, brass and bronze, differ from that of pure copper?


Which of the following alloys contains mercury as one of the constituents?
(a) stainless steel
(b) solder
(c) duralumin
(d) zinc amalgam


State two important uses of following metal 

Uses of magnesium  


Write name.
 Alloy of sodium with mercury.


Write scientific reason.

Anodes need to be replaced from time to time during the electrolysis of alumina.


Molecular formula of the chloride of an element X is XCl. This compound is a solid having high melting point. Write name of any element present in the same group as X


With reference to the following metals state their use in daily life metal:

Aluminium


State why telegraph poles are painted with aluminium paint.


Name the following:

The most reactive halogen.


Name the following:

A metal used in packaging.


A is a reddish-brown metal, which combines with O2 at < 1370 K gives B, a black coloured compound. At a temperature > 1370 K, A gives C which is red in colour. Find A, B, and C with reaction.


A doctor prescribed a tablet to a patient suffering from iron deficiency. The tablet does not look like iron. Explain.


Metals are ______ conductors of heat and electricity.


Match the following

i. Softest metal a. Copper
ii. Hardest metal b. Sodium
iii. Hardest non–metal c. Osmium
iv. Ductility d. Diamond

Which metals are not solid at room temperature?


X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:

Metal atoms tend to have a maximum of ______ electrons in the outermost shell.


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