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प्रश्न
Give reason for the following:
Rusting reduces the structural strength of iron.
उत्तर
Rusting corrodes iron and hence reduces its structural strength.
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संबंधित प्रश्न
Choose the most appropriate answer of the following:
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(A) Brass
(B) Bronze
(C) Solder
(D) Duralumin.
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Name two metals which are used for making jewellery and to decorate sweets.
Name the non-metal which is used to preserve food materials.
Name the metal which is used in making thermometers.
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(a) a metal
(b) a compound
(c) a non-metal
(d) a solution
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Name a non-metal that is liquid at room temperature
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Select from the following ist:
`Fe_2O_3, , NO, PbO, Mn_2O_7`
Amphoteric oxide …………
Select from the following ist:
`Fe_2O_3, , NO, PbO, Mn_2O_7`
Neutral oxide ……………..
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a metal whose oxide is reduced only by carbon
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| a. Potassium bromide (KBr) | 1. Combustible |
| b. Gold | 2. Soluble in water |
| c. Sulphur | 3. No chemical reaction |
| d. Neon | 4. High ductility. |
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Select the appropriate option for the following statement:
The element which shows properties of both metals and non-metals.
State whether the statement given below is true or false. If false write the correct statement.
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Pencil lead contains
