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METALS AND NON METALS
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Which non-metal is used in making glass? (a) Graphite (b) Sulphur (c) Silica (d) None of these
c
Which substance is used for making pencil lead? (a) Sulphur (b) Silicon (c) Graphite (d) Aluminium
c
Metal oxides are (a) neutral (b) basic (c) acidic (d) all of these
b
All metals are solids except (a) Sodium(b) Calcium(c) Mercury(d) Hydrogen.
c
Non-metals are: (a) generally liquids(b) generally gases (c) generally solids and gases(d) generally gases and liquids.
c
Materials having qualities of both metals and non-metals are (a) alloys (b) metalloids (c) noble metals (d) none of these
metalloids
The metal which is liquid at room temperature is (a) sodium (b) bromine (c) calcium (d) mercury
mercury
Arrange the following metals in the sequence of more reactive to less reactive.Iron, Zinc, Magnesium, Copper
Magnesium>Zinc>Iron>Copper.
It has been noticed that silverware becomes black faster today than it did fifty years ago. What can be the reason for this?
sulphur content in air have increased
Suppose copper was high up in the reactivity series. Would it still have been such a useful metal? Give reasons.
No, it very react easily so we cannot use it properly
Silver is the best conductor of electricity. Can you say why electric wires are not made of silver?
IT IS VERY EXPENSIVE
In displacement reactions (a) a more reactive metal displaces a less reactive metal. (b) a less reactive metal displaces a more reactive metal. (c) both (a) and (b) (d) none of these
A
When non-metals react with water then (a) Hydrogen gas is formed (b) Carbon dioxide gas is formed (c) Non-metals do not react with water
C
Which Of The Following Non-Metals Reacts And Catches Fire On Exposure To Air? [A]. Phosphorus [B]. Nitrogen [C]. Sulphur [D]. Hydrogen
A
The process of coating iron sheets with a thin layer of zinc is called A) Hibernation B) Electroplating C) Galvanisation D) None
C
Metals react with mineral acids to form A) Salt + Water B) Salt + Hydrogen C) Salt + HCl D) All
B
Metal A dipped in a salt of metal B displaces B from the solution. This shows that (a) A is more reactive than B. (b) B is more reactive than A. (c) both A and B are equally reactive. (d) no such conclusion can be drawn
A
Which one of the following alloys is light and strong? (a) brass (b) stainless steel (c) duralium (d) bronze
C
Gold normally occurs in nature (a) in a free state. (b) as carbonate ore. (c) as sulphate ore. (d) as sulphide ore.
FREE STATE
Which of these metals cannot displace hydrogen from a dilute acid? (a) iron (b) zinc (c) silver (d) calcium
SILVER
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