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प्रश्न
Give an example of a metal which is a poor conductor of heat.
उत्तर
- Mercury
- Lead
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संबंधित प्रश्न
Name one metal which is stored in kerosene oil.
Name one property which is characteristic of metals.
Which of the following are amphoteric oxides:
MgO, ZnO, P2O3, Al2O3, NO2
Which of the following non-metal is a liquid?
(a) carbon
(b) sulphur
(c) bromine
(d) iodine
The electronic configurations of four particles A, B, C and D given below:
| A | 2, 8, 8 |
| B | 2, 8, 2 |
| C | 2, 6 |
| D | 2, 8 |
Which electronic configuration represents:
(i) magnesium atom?
(ii) oxygen atom?
(iii) sodium ion
(iv) chloride ion?
Name a non-metal that is used to kill germs in water
Write ‘True’ or ‘False’ in front of following statements.
Non-metals are poor conductors of electricity.
Name a metal which is lighter than water :
Name a metal which is poor conductor of electricity :
Name a non-metal which is liquid form at room temperature.
Name:
a metal which is brittle
Name two metals which react with cold water.
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 |
What are the metals that make the alloys brass and bronze?
How are metals like sodium, potassium, and calcium obtained? Give equations.
Name the following:
An Alloy of copper and Zinc.
Differentiate between metals and non-metals with reference to –
(a) number of electrons in outer or valence shell
(b) formation of cation and anion
(c) reaction with dilute acids.
Give a reason why – properties of metals are related to their activity or reactivity series of metals. Explain the same with reference to potassium and iron in the series.
The sound of one metal colliding with another makes a noise, this property is called as _______.
Find the odd one out and give its explanation.
