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प्रश्न
Write ‘true’ or ‘false’ for the following statement.
Iodine acts as an antiseptic in the form of a tincture of iodine.
विकल्प
True
False
उत्तर
True
APPEARS IN
संबंधित प्रश्न
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Sodium is a very reactive metal. ( )
Which property of graphite is utilised in making electrodes?
What elements are present in steel? How are the properties of steel different from those of pure iron?
Mention two uses of the following metals and non-metals
Iodine
Aluminium is not used to make :
Write ‘True’ or ‘False’ in front of following statement.
Magnesium is used in making light weight alloys of aluminium.
Write name.
Alloy of sodium with mercury.
Write name.
Molecular formula of the common ore of aluminium.
State the position of the following in the periodic table:
Halogens
What is it made from? Why?
Pots and pans
The minerals from which the metal can be separated economically are called _______.
Aluminium: _______: gold : : electric insulator
Complete the following flowchart.
The metal which is liquid at room temperature is ______.
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.
Give an example of a metal which
- is liquid at room temperature.
- is the best conductor of heat.
Why are bells made of metals?
Match the following
| i. | Softest metal | a. | Copper |
| ii. | Hardest metal | b. | Sodium |
| iii. | Hardest non–metal | c. | Osmium |
| iv. | Ductility | d. | Diamond |
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the reducing agent.
