Which of the following elements occur free in nature
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NEET Practice Questions (MCQs) with Answers & Solutions
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Which of the following elements of group VA does not show allotropy
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Explanation
Bismuth (Bi) is the element that does not show allotropy among the group VA elements. Allotropy is the existence of an element in more than one form in the same physical state, and Bismuth does not exhibit this property.
The molecular formula of sulphur is
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Explanation
The molecular formula of sulfur is $ S_8 $. Sulfur commonly exists as an octatomic molecule where eight sulfur atoms form a puckered ring.
All the elements of oxygen family are
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The triatomic species of element oxygen is known as
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Explanation
The triatomic species of oxygen is known as ozone ( ext{O}_3). Ozone is a molecule consisting of three oxygen atoms and is an important component of the Earth's stratosphere where it absorbs most of the Sun's ultraviolet radiation.
Which of the following acts as pickling agent
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Which of the following is no suitable for use in dasiccator to dry substance
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Which of the following is the best scientific method to test presence of water in a liquid
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Explanation
The best scientific method to test for the presence of water in a liquid is the use of anhydrous CaSO4. Anhydrous calcium sulfate is a common desiccant and will change its physical state when it absorbs water, indicating the presence of water in the liquid.
Which of the following sulphate is insoluble in water
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Explanation
Lead sulfate (PbSO4) is insoluble in water. This is due to the low solubility product (Ksp) of PbSO4, which makes it precipitate out of solution rather than dissolve.
When sulphur is boiled with $ Na_2SO_3 $ solution, the compound formed is
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Explanation
$ Na_2SO_3 + S \rightarrow Na_2S_2O_3 $
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