Shared by a Veda teacher · Generated with Veda AI · Oct 2026
Veda Bites are swipeable micro-lessons — each one teaches exactly one idea. Here's a taste from this kit; the app has the full deck.
Everything lands in one of three groups.
Lemon juice and tamarind water are acidic. Soap solution and lime water are basic. Sugar solution and tap water are neither, which is called neutral. This chapter is about telling them apart without tasting.
It grows on old walls.
Litmus is a natural substance taken from lichens, the flat crusty growths on walls and bark. It comes as a solution you drop, and as paper soaked in it and dried, called litmus paper.
Two papers, three answers.
Red for acid, green for base.
Red rose extract turns a shade of red in an acidic solution and a shade of green in a basic one. The colours differ from litmus, which does not matter. What matters is that the indicator is consistent with itself.
Crush, soak, filter.
Pick up, do not pluck.
Collect petals that have already fallen. They make exactly as good an extract, so pulling flowers off a plant gains you nothing at all. Stripping a garden for an experiment is poor science and poor manners.
Substances sort into acidic, basic and neutral. Litmus, taken from lichens, tells them apart: blue turns red in acid, red turns blue in a base, and a neutral sample moves neither paper.
~40 min · full explanation, examples & memory tricks in the app
Crushed red rose petals soaked in hot water and filtered give an acid-base indicator: red in an acidic solution, green in a basic one. Beetroot, cabbage and hibiscus work too, and hydrangea reports on its own soil.
~40 min · full explanation, examples & memory tricks in the app
Turmeric paper is made by drying filter paper dipped in turmeric paste. Its yellow turns red in a basic solution and stays yellow in acidic and neutral ones, so it finds bases but cannot separate an acid from a neutral.
~40 min · full explanation, examples & memory tricks in the app
An acid and a base in sufficient quantity neutralise each other, giving salt, water and heat. The same reaction treats an ant bite with baking soda, corrects acidic soil with lime, and makes factory waste safe before rel…
~45 min · full explanation, examples & memory tricks in the app
140 questions laddered from warm-up to topper-level, each with an explanation. A taste:
Litmus is obtained from which of these?
BeginnerLichens growing on walls and on tree bark
Litmus is a natural substance taken from lichens, the crusty growths on old walls and bark.
A drop of a sample turns blue litmus paper red. The sample is
Beginneracidic in nature
Blue litmus going red is the signature of an acidic sample.
Consider these statements about litmus paper. I. A sample that turns blue litmus red is acidic. II. A sample that turns red litmus blue is basic. III. A neutral sample turns blue litmus red slowly. Which statements are correct?
AdvancedI and II only
I and II are correct. III is not: a neutral sample leaves BOTH papers unchanged, however long you leave it.
Keerthi tests a liquid and neither litmus paper changes colour. What should she conclude?
BeginnerThe liquid is neutral, which is a real result
Unchanged papers identify a neutral sample. Nothing happening is a finding, not a failure.
68 flashcards in this kit — the app reviews them with spaced repetition so the right card returns on the right day.
Every game is built from this kit's own content — scores feed your mastery, so playing counts as studying.
The full Veda Bites deck, complete notes, spaced-repetition flashcards, leveled MCQs, tests and games for this kit — plus Daily Facts and the Arena, every day.
