10th Grade > Chemistry
METALS AND NON-METALS MCQs
Total Questions : 57
| Page 3 of 6 pages
Answer: Option A. -> Statement I is true. Statement II is true. Statement II is the correct explanation of statement I.
:
A
The electronic configuration of Li is as follows -
K
L
2
1
The electron present in L shell experiences less attraction from the nucleus due to the increased distance of the shell. Also, it experiences repulsion from the electrons present in K shell. This further reduces the net effective nuclear force on it.
Hence, it is easier to knock off the outermost electron in lithium as compared to helium.
:
A
The electronic configuration of Li is as follows -
K
L
2
1
The electron present in L shell experiences less attraction from the nucleus due to the increased distance of the shell. Also, it experiences repulsion from the electrons present in K shell. This further reduces the net effective nuclear force on it.
Hence, it is easier to knock off the outermost electron in lithium as compared to helium.
Answer: Option B. -> ductility
:
B
Ductility is a physical property of matter, usually of metals like gold, silver etc. It is defined as the ability of metals to be drawn into thin wires. Gold is the most malleable and ductile metal among all the metals.
:
B
Ductility is a physical property of matter, usually of metals like gold, silver etc. It is defined as the ability of metals to be drawn into thin wires. Gold is the most malleable and ductile metal among all the metals.
Answer: Option A. -> True
:
A
In electro-refining process, the impure metal is made the anode and a thin strip of pure metal is made the cathode. A solution of the metal salt is used as an electrolyte.
Upon passing electric current, the copper atoms migratefrom the anode towards the cathode and get deposited there.
:
A
In electro-refining process, the impure metal is made the anode and a thin strip of pure metal is made the cathode. A solution of the metal salt is used as an electrolyte.
Upon passing electric current, the copper atoms migratefrom the anode towards the cathode and get deposited there.
Answer: Option C. -> Redox reaction
:
C
During corrosion, metal reacts with oxygen to from oxides. Since oxidation can not occur alone, corrosion is a redox reaction.
:
C
During corrosion, metal reacts with oxygen to from oxides. Since oxidation can not occur alone, corrosion is a redox reaction.
Answer: Option D. -> Bromine
:
D
Oxygen, fluorine are gases, sulphur is a solid at room temperature and bromine isliquidat room temperature.
:
D
Oxygen, fluorine are gases, sulphur is a solid at room temperature and bromine isliquidat room temperature.
Answer: Option B. -> amphoteric oxides
:
B
Some metal oxides, such as aluminum oxide, zinc oxide, etc., show both acidic as well as basic behavior. Such metal oxides can react with both acids as well as bases to produce salts and water. Metal oxides of this category are known as amphoteric oxides.
:
B
Some metal oxides, such as aluminum oxide, zinc oxide, etc., show both acidic as well as basic behavior. Such metal oxides can react with both acids as well as bases to produce salts and water. Metal oxides of this category are known as amphoteric oxides.
Answer: Option A. -> All ores are minerals.
:
A
The elements or compounds, which occur naturally in the earth’s crust, are known as minerals.
At some places, minerals contain a high percentage of a particular metal and the metal can be profitably extracted from them. These minerals are called ores.
So, all ores are minerals, but not all minerals are ores.
:
A
The elements or compounds, which occur naturally in the earth’s crust, are known as minerals.
At some places, minerals contain a high percentage of a particular metal and the metal can be profitably extracted from them. These minerals are called ores.
So, all ores are minerals, but not all minerals are ores.
Answer: Option C. ->
Graphite
:
C
:
C
Graphite is a good conductor of electricity because of its structure. Like metals, it contains delocalised electrons which are free to conduct electricity.
Answer: Option C. ->
bromine
:
C
:
C
Bromine is a halogen which is found in liquid state at room temperature and pressure. Oxygen and nitrogen are found in gaseous state at room temperature. Whereas iodine is found in solid state at room temperature.
Answer: Option B. ->
silver sulphide
:
B
:
B
Corrosion is a process of conversion of a metal into its compound ie. oxides or carbonates etc. by continuous interaction with atmospheric air and water vapour.
On exposure to air for a long time, silver articles combine with sulphur in the atmosphere. As a result, black coating of silver sulphide is formed on their surface. The reaction involved is:
2Ag(s)+H2S(g)→Ag2S(s)+H2(g)
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