Chemistry · Science General
Common Chemical Compounds and Reactions
1,204 Questions
Common chemical compounds and reactions questions test your knowledge of everyday chemicals, their formulas, and their interactions. Topics include properties of acids and bases, hard water chemistry, and compounds like baking soda and plaster of paris. This section is essential for general science preparation.
Acids and basesPlaster of parisHard water chemistryCommon chemical formulasEveryday chemical reactions
Common Chemical Compounds and Reactions Questions
D
Correct answer
Explanation
Mineral absorption occurs through two main mechanisms: passive absorption (without energy expenditure along concentration gradients) and active absorption (requiring metabolic energy against concentration gradients).
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Sodium hydroxide and potassium hydroxide
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Sodium hydroxide and calcium hydroxide
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Sodium hydroxide and ammonium hydroxide
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Calcium hydroxide and ammonium hydroxide
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Potassium hydroxide and calcium hydroxide
D
Correct answer
Explanation
This is the correct option. Calcium hydroxide and ammonium hydroxide are both weak bases.
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Sodium hydroxide
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Calcium hydroxide
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Magnesium hydroxide
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Sodium carbonate
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Sodium hydrogencarbonate
A
Correct answer
Explanation
This is the correct option. Sodium hydroxide is used in the manufacture of rayon.
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NaOH
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KoH
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Ca(OH)2
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NH4OH
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Na2CO3
E
Correct answer
Explanation
This is the correct option. Na2CO3 (chemical name sodium carbonate) is not an alkali.
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Bleaching powder
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Plaster of Paris
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Washing soda
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Caustic soda
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Baking soda
A
Correct answer
Explanation
This is the correct option. Bleaching powder is used in the manufacturing of chloroform.
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tartaric acid
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vinegar
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citric acid
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caustic soda
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baking soda
B
Correct answer
Explanation
This is the correct option. If a wasp stings a person, then rubbing a mild acid like vinegar can neutralise it.
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Sodium carbonate
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Sodium acetate
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Sodium chloride
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Sodium hydroxide
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Sodium hydrogencarbonate
E
Correct answer
Explanation
This is the correct option. Sodium hydrogencarbonate has a mild, non-corrosive base and is mildly alkaline in water.
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Only a
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Only a and b
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Only b
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Only b and c
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Only c
C
Correct answer
Explanation
This is the correct option as this statement is false. The solution of washing soda in water is alkaline that turns red litmus blue.
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An element
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A compound
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A heterogeneous mixture
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A homogeneous mixture
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potassium chloride
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potassium nitrate
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ammonium carbonate
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magnesium sulphate
D
Correct answer
Explanation
Epsom salt is magnesium sulfate (MgSO4·7H2O). It is named after Epsom, England where it was originally obtained from mineral springs. The other options are different salts: potassium chloride, potassium nitrate, and ammonium carbonate.
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Baking soda
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Detergent
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Washing soda
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Soap
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None of these
C
Correct answer
Explanation
It is the chemical formula of washing soda.
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Silica
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Alumina
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Ferric oxide
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Calcium carbonate
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Sodium carbonate
E
Correct answer
Explanation
It is not used in cement.
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Magnesium
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Sulphur
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Silicon
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Phosphorus
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None of these
B
Correct answer
Explanation
Sulphur is used as an antiseptic.
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Feldspar
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Gypsum
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limestone
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Sandstone
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Shale
B
Correct answer
Explanation
Calcium sulphate takes in water and turns to gypsum, which is more unstable than calcium sulphate. This is the correct answer.
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cerium(IV) sulfate
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chromic acid
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chromium(II) chloride
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chromium(III) oxide
C
Correct answer
Explanation
Chromium(II) chloride is the chemical compound with the formula CrCl2. This white, crystalline solid is used for the synthesis of other chromium complexes. CrCl2 is hygroscopic.It is used as a precursor to other inorganic and organometallic chromium complexes. Alkyl halides and nitroaromatics are reduced by CrCl2.