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प्रश्न
Mention two uses of the following metals and non-metals
Oxygen
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उत्तर
It is used by all living beings for breathing.
It is important for combustion.
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संबंधित प्रश्न
State five uses of metals
State one use of Copper.
The atomic number of an element Y is 16.
(a) What must an atom of Y do to achieve the nearest inert gas electron arrangement?
(b) Which inert gas is nearest to Y?
Fill in the following blank with suitable word:
The alloy in which one of the metals is mercury is called an ...............
Mention two uses of the following metals and non-metals
Iodine
Give reasons
Graphite is used in the leads of pencils
Write ‘true’ or ‘false’ for the following statement :
Silver is used to make electric cables.
Statements given below are incorrect. Write the correct statements :
Zinc is used for making power transmission wires.
State two important uses of following metal:
Uses of silver
The electronic configuration of metal ‘A’ is 2,8,1 and that of metal ‘B’ is 2,8,2. Which of the two metals is more reactive? Write their reaction with dilute hydrochloric acid.
Which is the non-ionic compound in the compounds given below.
AgNO3 + Nacl → AgCl + NaNO3
With reference to the following metals state their use in daily life metal:
Aluminium
Name the following:
A metal used in packaging.
Name the following:
The chemical compound responsible for the green deposit on the surface of articles of copper.
Name the following:
A halogen which is a solid at room temperature.
Soft metal : Na : : hard metal : _______
Higher Order Thinking Skills.
Aakash noticed that the metal latch on gate was difficult to open during hot sunny days. However, it was not difficult to open the same latch at night. Aakash observed that the latch and the gate are exposed to the sun during day time.
- Formulate a hypothesis based on the information provided.
- Briefly state how you would test the hypothesis.
Name one metal and one non-metal that exist in liquid state at room temperature. Also name two metals having melting point less than 310 K (37°C)
The liquid metal at room temperature ______.
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the metallic element.
