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प्रश्न
Name the following:
A halogen which is a solid at room temperature.
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उत्तर
Iodine
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संबंधित प्रश्न
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Generally, non-metals react with acids. ( )
Saloni took a piece of burning charcoal and collected the gas evolved in a test tube.
(a) How will she find the nature of the gas?
(b) Write down word equations of all the reactions taking place in this process.
State one use of Iron.
State one use of Mercury.
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Fill in the following blank with suitable word:
Brass is an alloy of copper and .........
Write ‘true’ or ‘false’ for the following statement.
Iodine acts as an antiseptic in the form of a tincture of iodine.
State two important uses of following metal:
Uses of silver
State the position of the following in the periodic table:
Iron and zinc
Write name.
Alloy of sodium with mercury.
Write name.
The reagent that dissolves noble metals.
What is it made from? Why?
Pots and pans
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copper
With reference to the following metals state their use in daily life metal:
Lead
Electronic configuration of metal A is 2,8,1. Electronic configuration of metal B is 2,8,8,2. Which of the above metals is more reactive? Explain with reason.
What is ductility?
Give reasons for the following.
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- Immersion rods for heating liquids are made up of metallic substances.
- Sodium and potassium are stored in kerosene.
- Mercury is used in thermometers.
The most abundant metal in the earth’s crust is ____________.
A doctor prescribed a tablet to a patient suffering from iron deficiency. The tablet does not look like iron. Explain.
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