Science - Materials : Metals and Non-metals
Exam Duration: 45 Mins Total Questions : 30
How many electrons are present in nonmetals in their outermost shell?
- (a)
1,2 or 3
- (b)
8,9 or 10
- (c)
10,20 or 30
- (d)
4, 5, 6 or 7
To which category do antimony and arsenic belong?
- (a)
Metals
- (b)
Metalloids
- (c)
Non-metals
- (d)
Minerals
Identify the metal that replaces magnesium from its salt.
- (a)
Ca
- (b)
Al
- (c)
Zn
- (d)
Fe
Aluminium foil is used for wrapping food. On which property is it used?
- (a)
Density
- (b)
Malleability
- (c)
Ductility
- (d)
Strength
Identify the non-metal which exhibits yellow colour.
- (a)
Silicon
- (b)
Phosphorus
- (c)
Sulphur
- (d)
Carbon
Which of the following are the properties of non-metals?
- (a)
Only (i) and (ii)
- (b)
Only (ii) and (iii)
- (c)
Only (i) and (iii)
- (d)
(j), (ii) and (iii)
Which of the following non-metals exists in liquid state at room temperature?
- (a)
Chlorine
- (b)
Nitrogen
- (c)
Bromine
- (d)
Hydrogen
Identify the metal that does NOT react with HCI.
- (a)
Ag
- (b)
Mg
- (c)
Al
- (d)
Fe
Which metal reacts vigorously with HCl to produce salt and hydrogen?
- (a)
Na
- (b)
Zn
- (c)
Sn
- (d)
Pb
When non-metals combine with oxygen, what do they produce?
- (a)
Acidic oxides
- (b)
Basic oxides
- (c)
Amphoteric oxides
- (d)
Salts
Identify the oxide of a non-metal which is neutral.
- (a)
S02
- (b)
N02
- (c)
P2O3
- (d)
CO
Phosphorus combines with oxygen to form oxides. How many types of oxides are formed by it?
- (a)
One
- (b)
Two
- (c)
Three
- (d)
Four
Which of the following dissolves in water to form sulphuric acid?
- (a)
Sulphur dioxide
- (b)
Sulphur
- (c)
Sulphur trioxide
- (d)
Copper sulphate
Which material is used for making crucibles?
- (a)
Sulphur
- (b)
Silicon
- (c)
Graphite
- (d)
Phosphorus
Identify the metal which is soft.
- (a)
Na
- (b)
Pb
- (c)
Al
- (d)
Cu
Why is tungsten used as a filament in electric bulbs?
- (a)
It is sonorous.
- (b)
It is metallic.
- (c)
It has a high melting point.
- (d)
It has high density.
Which of the following is NOT a heavy metal?
- (a)
Cd
- (b)
Hg
- (c)
Pb
- (d)
K
Which of the following substances will prevent corrosion of metals?
- (a)
Nitrogen
- (b)
Hydrogen
- (c)
Oxygen
- (d)
Carbon
Which of the following metals in their molten state cause galvanisation of an iron article?
- (a)
Zinc
- (b)
Copper
- (c)
Carbon
- (d)
Gold
Arrange the given metals in the descending order of their reactivity.
- (a)
Aluminium, copper, potassium
- (b)
Sodium, iron, copper
- (c)
Silver, zinc, calcium
- (d)
Magnesium, copper, sodium
When a little aluminium powder is added to dilute sulphuric acid, the product(s) formed in the reaction is
- (a)
sulphur dioxide.
- (b)
aluminium sulphate.
- (c)
hydrogen
- (d)
Both (B) and (C)
Why is gold mixed with copper?
- (a)
To make gold soft
- (b)
To make gold hard
- (c)
To make gold more yellowish
- (d)
To give gold a lustre
Which of the following statements is correct?
- (a)
All metals are ductile.
- (b)
All non-metals are ductile.
- (c)
Generally, metals are ductile.
- (d)
Some non-metals are ductile
Study the reaction given below
What are 'X' and 'Y' ?
- (a)
AI, Mg (B)
(C)(D) - (b)
Zn, Cu
- (c)
Ag, K
- (d)
H, Al
Which of the following is NOT a general property of metals?
- (a)
Ductility
- (b)
Malleability
- (c)
Bad conductor of electricity
- (d)
Sonorous nature
Which of the following is a chemical displacement reaction?
- (a)
\(2Al+F{ e }_{ 2 }{ O }_{ 3 }\overset { Heat }{ \longrightarrow } A{ l }_{ 2 }{ O }_{ 3 }+2Fe+Heat\)
- (b)
\(2Na+C{ l }_{ 2 }\longrightarrow 2NaCl\)
- (c)
\({ P }_{ 2 }{ O }_{ 5 }+3\quad { H }_{ 2 }O\longrightarrow 2{ H }_{ 3 }{ PO }_{ 4 }\)
- (d)
\(2Pbs+3{ O }_{ 2 }\overset { Heat }{ \longrightarrow } PbO+3\quad S{ O }_{ 2 }\)
Which of the following statements is NOT true of sodium and potassium?
- (a)
Both are metals.
- (b)
Both are hard.
- (c)
Both are solids at room temperature
- (d)
Both react with oxygen to form oxides.
Identify the true statement from the following.
- (a)
Metals have fixed melting points whereas non-metals do not.
- (b)
All metals are malleable.
- (c)
The hardest substance known is a non-metal
- (d)
Tungsten is a bad conductor of heat and electricity
Which of the following metals does NOT produce hydrogen gas when added to acid?
- (a)
Potassium
- (b)
Gold
- (c)
Zinc
- (d)
Magnesium
Metal 'X' reacts very slowly with water but reacts vigorously with steam. Identify metal 'X'.
- (a)
Magnesium
- (b)
Silver
- (c)
Copper
- (d)
Potassium