Chemistry-
General
Easy
Question
Which property is common in diamond and graphite
- Electrical conductivity
- Crystal structure
- Atomic weight
- Density
The correct answer is: Atomic weight
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Graphite is a good conductor of electricity due to
Graphite is a good conductor of electricity due to
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Graphite is used as lubricant due to
Graphite is used as lubricant due to
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The alkaline earth metal which does not directly combine with hydrogen is:
The alkaline earth metal which does not directly combine with hydrogen is:
Chemistry-General
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Both alkaline earth metals and alkali metals are s-block elements. They resemble with each other in many respects but still there are certain dissimilarities in their properties on account of different number of electrons in the valence shell, smaller atomic radii, higher ionisation potential, higher electronegativity, etc.
Like lithium, beryllium also differs from rest of the alkaline earth metals on account of its small atomic size and high electronegativity. Be2+ ion is very small and exerts a high polarising effect on any anion associated with it.
Which is least thermally stable?
Both alkaline earth metals and alkali metals are s-block elements. They resemble with each other in many respects but still there are certain dissimilarities in their properties on account of different number of electrons in the valence shell, smaller atomic radii, higher ionisation potential, higher electronegativity, etc.
Like lithium, beryllium also differs from rest of the alkaline earth metals on account of its small atomic size and high electronegativity. Be2+ ion is very small and exerts a high polarising effect on any anion associated with it.
Which is least thermally stable?
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Aqua regia is a mixture of
Aqua regia is a mixture of
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Which of the following metals is protected from oxygen and mositure by immersing in kerosene oil?
Which of the following metals is protected from oxygen and mositure by immersing in kerosene oil?
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Beakers A, B and C contain zinc sulphate, silver nitrate and iron (II) sulphate solutions respectively. Copper pieces are added to each beaker. blue colour will appear in case of
Beakers A, B and C contain zinc sulphate, silver nitrate and iron (II) sulphate solutions respectively. Copper pieces are added to each beaker. blue colour will appear in case of
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Which of the following pairs will give displacement reactions
Which of the following pairs will give displacement reactions
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Zone refining is used for the :
Zone refining is used for the :
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A process employed for the concentration of sulphide ore is :
A process employed for the concentration of sulphide ore is :
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The process of calcination is used for
The process of calcination is used for
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Rust is hydrated
Rust is hydrated
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Stainless steel is addition to iron contains
Stainless steel is addition to iron contains
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When a sample of copper containing iron as impurity is purified by electrolysis, the appropriate electrodes are: Cathode Anode
When a sample of copper containing iron as impurity is purified by electrolysis, the appropriate electrodes are: Cathode Anode
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Parts of aeroplanes are generally made from
Parts of aeroplanes are generally made from
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