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प्रश्न
With reference to the following metal state its use in daily life:
Magnesium
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उत्तर
- It is used in fireworks as it burns with a dazzling light.
- Photography: Magnesium produces a bright flash. It is used in strip form.
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संबंधित प्रश्न
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.
The atomic number of an element X is 12.
(a) What must an atom of X do to attain the nearest inert gas electron configuration?
(b) Which inert gas is nearest to X?
The atomic number of an element Y is 16.
(a) What must an atom of Y do to achieve the nearest inert gas electron arrangement?
(b) Which inert gas is nearest to Y?
What is an amalgam?
Fill in the following blank with suitable word:
Brass is an alloy of copper and .........
What is a thermite reaction? Explain with the help of an equation. State one use of this reaction.
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
Salt of silver, such as ________ is used for making photographic films.
Statements given below are incorrect. Write the correct statements :
Bronze is a mixture of 10% copper, 80% zinc and 10% tin.
Why are alkali metals kept in kerosene oil?
Write name.
The reagent that dissolves noble metals.
What is it made from? Why?
Electric cables
Name the following:
The most reactive halogen.
Name the following:
The chemical compound responsible for the green deposit on the surface of articles of copper.
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
An amorphous substance which turns from pale green to black on strong heating evolving a colourless, acidic gas as the only gaseous product.
Match the columns.
| Group A | Group B |
| 1) Copper and Zinc | a) Brass |
| 2) Copper and Tin | b) Bronze |
| c) Stainless steel |
Complete the following flow chart.
Which one of the following is an example for a metal?
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
Metal atoms tend to have a maximum of ______ electrons in the outermost shell.
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the reducing agent.
