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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

With Reference to the Following Metals State Their Use in Daily Life Metal: Zinc - Chemistry

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प्रश्न

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

Zinc

एक पंक्ति में उत्तर
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उत्तर

Zinc:

  1. For galvanising iron sheets because Zinc coated iron sheets does not rust.
  2. In Dry cells as Zinc container acts as cathode.
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अध्याय 6: Metals and Non-metals - Exercise

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संबंधित प्रश्न

Give reasons for the following.

Sodium and potassium are stored in kerosene.


State one use of Copper.


State one use of Gold.


Fill in the following blank with suitable word:

The alloy in which one of the metals is mercury is called an ...............


Fill in the following blank with suitable word:

The electrical conductivity and melting point of an alloy is ........... than that of pure metals.


A metal with melting point less than 50°C is


Name a metal which is best conductor of electricity :  


Give the general characteristics of:

Alkaline earth metals with reference to

(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid


Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:

Water.


Write name.

The nonmetal having electrical conductivity.


Name the following:

A halogen which is a solid at room temperature.


Write the name.

Two highly reactive metals-


Which of the following two combinations are correct?

 

  Metal Gas Evolved
(i) Copper Yes
(ii) Iron Yes
(iii) Magnesium No
(iv) Zinc Yes

Which of the following is not a metal?


Name two soft metals which can be cut with a knife.


Why are bells made of metals?


In the following figure, you find that the bulb glows when an iron nail is placed between two ends of wire. Complete the following sentences on the basis of this fact.

  1. ______  is a metal.
  2. Metals are good ______ of electricity. 

Metals are ______ conductors of heat and electricity.


Match the following

i. Silica a. Caustic potash
ii. Potassium hydroxide b. Sand
iii. Sodium hydroxide c. Calamine
iv. Zinc carbonate d. Caustic soda

The metals which are found in both free state as well as combined state are ______.


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