Chemistry Previous Year Questions 2026 | IB Security Assistant/Executive

Chemistry - MOST IMPORTANT IB Security Assistant/Executive Previous Year Questions

Practice real questions from previous year exams of IB Security Assistant/Executive.

📘 Important Chemical Compounds📚 Baking Soda
Q1

The fluffiness of cakes and idlis is due to the release of carbon dioxide gas when baking soda reacts with which of the following?

🎯 IB Security Assistant/Executive 2025
📘 Chemistry in Everyday Life📚 Misc
Q2

What two components primarily react in the Maillard reaction to produce the browning and flavour in cooked foods?

🎯 IB Security Assistant/Executive 2025
📘 Periodic Table📚 Mendeleev Periodic Table
Q3

Mendeleev left a gap under aluminium and named the predicted element as __________.

🎯 IB Security Assistant/Executive 2025
📘 Environmental Chemistry📚 Acid Rain
Q4

Which gas, acting together with nitrogen oxides, is a principal precursor of acid rain?

🎯 IB Security Assistant/Executive 2025
📘 Pure Substance- Element-Classification of Matter on the basis of Chemical Properties- II📚 Non-metals and its properties
Q5

__________ is a rich source of iodine.

🎯 IB Security Assistant/Executive 2025
📘 Chemical Reactions📚 Photochemical Reaction
Q6

What process allows plants to produce sugars using the sun's energy and carbon dioxide?

🎯 IB Security Assistant/Executive 2025