Chemistry-
General
Easy

Question

Which one of the following elements reduces NaOH to Na

  1. Si
  2. Pb
  3. C
  4. Sn

The correct answer is: C

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Which of the following elements reacts with steam

Which of the following elements reacts with steam

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SiO subscript 4 superscript 4 minus end superscript is the basic structural unit in the following silicates

SiO subscript 4 superscript 4 minus end superscript is the basic structural unit in the following silicates

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Silicones contain the following characteristics

Silicones contain the following characteristics

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In H2SiF6 the covalency of silicon is

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Carbogen is

Carbogen is

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Carbondioxide dissolves under pressure in water to give

Carbondioxide dissolves under pressure in water to give

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During day time plants absorb

During day time plants absorb

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CO can be used as a fuel but not CO2 because

CO can be used as a fuel but not CO2 because

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An example of major air pollutant is

An example of major air pollutant is

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The hybridisation of carbon in carbon monoxide is

The hybridisation of carbon in carbon monoxide is

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Which property is common in diamond and graphite

Which property is common in diamond and graphite

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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:

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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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