Advertisements
Advertisements
प्रश्न
Mention two uses of the following metals and non-metals
Iodine
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Give a reason for Alkali metals are good reducing agents.
Fill in the following blank with suitable word:
The electrical conductivity and melting point of an alloy is ........... than that of pure metals.
What is a thermite reaction? Explain with the help of an equation. State one use of this reaction.
What is meant by 22 carat gold? Name the metals which are usually alloyed with gold to make it harder.
State two important uses of following metal:
Uses of zinc
State two important uses of following metal
Uses of mercury
State the position of the following in the periodic table:
Aluminium
Give the general characteristics of:
Alkali metals,
(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:
Hydrochloric acid,
Write name.
Alloy of sodium with mercury.
Write name.
The reagent that dissolves noble metals.
With reference to the following metal state its use in daily life:
Magnesium
Can you store pickle in an aluminium utensil? Give reason.
Name two major non-metals which are present in fertilisers and enhance the growth of plants.
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.
- ______ is a metal.
- Metals are good ______ of electricity.
Metals have high melting points.
Match the following
| i. | Silica | a. | Caustic potash |
| ii. | Potassium hydroxide | b. | Sand |
| iii. | Sodium hydroxide | c. | Calamine |
| iv. | Zinc carbonate | d. | Caustic soda |
Why do metals appear shiny?
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the metallic element.
