Question 21
Which subatomic particle has a negligible mass but a negative charge?Atomic structureAtomic structureeasy
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Question 22
Which of the following salts is formed when hydrochloric acid reacts with sodium hydroxide?Acids, bases, saltsSaltsmedium
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Question 23
What is the number of protons in an atom with atomic number 12?Atomic structureAtomic Structureeasy
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Question 24
Calculate the number of moles in 44g of carbon dioxide (CO₂). (Atomic masses: C=12, O=16)Mole conceptMole Concepteasy
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Question 25
Which hydrocarbon is an alkene?Organic chemistryOrganic Chemistrymedium
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Question 26
In the equilibrium reaction N₂ + 3H₂ ⇌ 2NH₃, what will happen if the pressure is increased?Rates and equilibriumChemical Equilibriumhard
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Question 27
Which of the following ions is characteristic of a base?Acids, bases, saltsAcids, Bases and Saltseasy
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Question 28
Which type of bonding is present in sodium chloride (NaCl)?Chemical bondingChemical Bondingmedium
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Question 29
What is the number of protons in an atom of carbon-12?Atomic structureAtomic structureeasy
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Question 30
Which type of bond is formed by the sharing of electron pairs between atoms?Chemical bondingChemical bondingeasy
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