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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.
पर्याय
True
False
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उत्तर
True
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संबंधित प्रश्न
State one use of the following metal:
Gold
The alloy in which one of the metals is mercury is called an ______.
What is a thermite reaction? Explain with the help of an equation.
How are the properties of an alloy different from those of the constituent elements?
Mention two uses of the following metals and non-metals
Aluminium
Give reasons
Magnesium is used in fire works.
Give reasons
Aluminium is used in making aircrafts.
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
A solution of a metal in mercury is called ________
Write name.
Alloy of sodium with mercury.
Write name.
The device used for grinding an ore.
Molecular formula of the chloride of an element X is XCl. This compound is a solid having high melting point. Write name of any element present in the same group as X
Give reasons for the following:
Most metals conduct electricity well.
With reference to the following metals state their use in daily life metal:
iron
State why telegraph poles are painted with aluminium paint.
Give reasons for the following.
- Aluminum foils are used to wrap food items.
- Immersion rods for heating liquids are made up of metallic substances.
- Sodium and potassium are stored in kerosene.
- Mercury is used in thermometers.
A is a reddish-brown metal, which combines with O2 at < 1370 K gives B, a black coloured compound. At a temperature > 1370 K, A gives C which is red in colour. Find A, B, and C with reaction.
Which of the following property is generally not shown by metals?
The ability of metals to be drawn into thin wire is known as
Give an example of a metal which
- is liquid at room temperature.
- is the best conductor of heat.
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the metallic element.
