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प्रश्न
उत्तर
- Copper is more reactive than silver. Hence displacement reaction occurs.
- When copper coin is dipped in silver nitrate solution forming copper nitrate and silver metal.
- A shining white deposit of silver metal is formed on copper coin. Hence she saw a silver shine on the copper coin.
Balanced equation:-
2AgNO3(aq) + Cu(s) → Cu(NO3)2(aq) + 2Ag(s)
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संबंधित प्रश्न
Can you store lemon pickle in an aluminium utensil? Explain.
Match the substances given in Column A with their uses given in Column B.
| A | B | ||
| 1 | Gold | a | Thermometers |
| 2 | Iron | b | Electric wire |
| 3 | Aluminium | c | Wrapping food |
| 4 | Carbon | d | Jewellery |
| 5 | Copper | e | Machinery |
| 6 | Mercury | f | Fuel |
Choose the correct answer from the options given below:
Anhydrous iron(III) chloride is prepared by:
1) direct combination
2) simple displacement
3) decomposition
4) neutralization
Name the most abundant non-metal in the earth's crust.
Give the name and formulae of two basic oxides.
Fill in the blank:
A metal stored in kerosene oil is _______
Fill in the blank
Tungsten metal is a poor conductor of _______
Fill in the blank
A chemical compound that makes up the striking heads of match sticks is ______
State two important uses of following non-metal
Uses of graphite
`Mg -— → Mg^(2+)`
Select from the following ist:
`Fe_2O_3, , NO, PbO, Mn_2O_7`
Neutral oxide ……………..
Name:
a metal whose oxide is reduced only by carbon
The table below compares some properties of metals and non-metals. Write down the missing
statements (i) to (iv) :
| Metals | Non-metals |
| (i) ………………….. | Poor conductors of heat |
| (ii) Malleable | …………………… |
| (iii) Form positive ions | …………………… |
| (iv) ………………… | Form acidic oxides |
How many valence electrons are present in:
(ii) non-metals?
Which metal occurs as a sulphide also gives the name of their respective ore.
With reference to the physical properties of metals and non-metals, state the following exception.
A non-metal which has low tensile strength
Select the appropriate option for the following statement:
The element which is noble gas and radioactive in nature.
_______ is good conductor of heat but bad conductor of electricity.
Which of the following non-metal is lustrous?
Boojho has learnt that non-metals on beating with a hammer are generally broken into pieces. Which of the following is non-metal?
