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प्रश्न
Match the following:
| Column A | Column B |
| (a) Helium | (1) Electric bulb |
| (b) Neon | (2) Thermometer |
| (c) Argon | (3) Semiconductor |
| (d) Germanium | (4) Weather balloons |
| (e) Mercury | (5) Advertising signboards |
उत्तर
| Column A | Answers |
| (a) Helium | (4) Weather balloons |
| (b) Neon | (5) Advertising signboards |
| (c) Argon | (1) Electric bulb |
| (d) Germanium | (3) Semiconductor |
| (e) Mercury | (2) Thermometer |
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संबंधित प्रश्न
Give an example of a metal which is the best conductor of heat.
Give reasons for the following.
Aluminium foils are used to wrap food items.
Choose the most appropriate answer of the following:
This is not an alloy of copper:
(A) Brass
(B) Bronze
(C) Solder
(D) Duralumin.
Give the name and formulae of two acidic oxides.
Write the name and formulae of a non-metal hydride.
Name a metal used as a thermometric liquid
Name a non-metal that a good conductor of heat and electricity
Fill in the blank
Tungsten metal is a poor conductor of _______
Fill in the blank.
A non-metal used to purify water is ______.
The noble gas used in advertising signboards is
Statements given below are incorrect. Write the correct statements :
Chlorine gas is used in the manufacture of sulphuric acid.
Why are alloys made?
`N+—→ N^3-`
Select from the following ist:
`Fe_2O_3, , NO, PbO, Mn_2O_7`
Amphoteric oxide …………
Give the balanced reactions for the following:
Magnesium reacts with boiling water
Three experiments to study the process of rusting are given below. Observe the three test tubes and answer the following questions.
- Why the nail in the test tube 2 is not rusted?
- Why is the nail in the test tube 1 is rusted highly?
- Would the nail in the test tube 3 get rusted?
Give the common name and chemical name of an ore of:
(a) zinc (b) aluminium (c) iron.
With reference to the physical properties of metals and non-metals, state the following exception.
A metal which floats on water.
Give reason for the following:
Potassium reacts vigorously with cold water while copper does not react with water or steam.
