Chemistry (General Concepts) MCQs with Answers

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The physical methods used to measure physical properties are called Gravimetric analysis method.

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The molecular formula C₃H₅Br has 5 possible structural isomers.

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1-butyne has the most acidic hydrogen among the given compounds due to the greater s-character (sp hybridization) of the carbon attached to the terminal triple bond.

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Pyridine is a stronger Lewis base among the given options because its lone pair on nitrogen is readily available in an sp² hybridized orbital and is not delocalized into the aromatic ring for bonding purposes.

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Sugar dissolving in water represents a solid liquid solution, where sugar (solid solute) dissolves in water (liquid solvent).

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The solubility of sulphates of alkaline earth metals decreases down the group.

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Radioactive isotopes like Carbon-14 are used to determine the age of fossils through radiometric dating techniques.

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The dissolving of a salt in water is a physical change because the salt can be recovered by evaporation and no new substance is formed.

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O2 (oxygen molecule) has a K bond, as it contains a double bond consisting of one sigma and one pi bond, with the pi bond being referred to as a K bond in certain contexts.

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A buffer is a solution that resists change in its pH when small amounts of acid or base are added.