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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
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उत्तर
True
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संबंधित प्रश्न
What is a thermite reaction? Explain with the help of an equation.
Give reasons
Aluminium is used in making aircrafts.
Write ‘true’ or ‘false’ for the following statement :
Silver is used to make electric cables.
State two important uses of following metal:
Uses of zinc
State two important uses of following metal
Uses of lead
State the position of the following in the periodic table:
Alkaline earth metals
Give the general characteristics of:
Alkali metals,
(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid
Why is hydrogen placed with alkali metals?
Write name.
The reagent that dissolves noble metals.
What is it made from? Why?
Pots and pans
State why telegraph poles are painted with aluminium paint.
Name the following:
A halogen which is a solid at room temperature.
Match the columns.
| Group A | Group B |
| 1) Copper and Zinc | a) Brass |
| 2) Copper and Tin | b) Bronze |
| c) Stainless steel |
Write the name.
Two highly reactive metals-
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.
Which of the following metals are obtained by electrolysis of their chlorides in molten state?
- Na
- Ca
- Fe
- Cu
The liquid metal at room temperature ______.
Metals have high melting points.
