A student says, “This resource finishes if overused and takes millions of years to form again.” Which category fits best
Continue readingCategory: 4. Patwari (HP), JBT (HP)
Chapter 29: Natural Resources and Fossil Fuels (Set-1)
Natural resources that can be replaced naturally in a short time are called A Non-renewable resources B Metallic minerals C
Continue readingChapter 28: Chemical Changes and Core Chemistry (Set-5)
A student adds salt to ice to cool a drink quickly; which idea best explains the extra cooling? A Heat
Continue readingChapter 28: Chemical Changes and Core Chemistry (Set-4)
A student heats blue copper sulphate crystals and they turn white; what change is mainly happening? A New salt forms
Continue readingChapter 28: Chemical Changes and Core Chemistry (Set-3)
When a wet cloth dries in open air, what mainly happens to the water in it? A Water reacts chemically
Continue readingChapter 28: Chemical Changes and Core Chemistry (Set-2)
A glass tumbler breaks into pieces; which statement is correct about this change? A New substance forms B Only shape
Continue readingChapter 28: Chemical Changes and Core Chemistry (Set-1)
Which change is usually reversible and forms no new substance? A Burning paper B Rusting iron C Melting ice D
Continue readingChapter 27: Matter in Our Surroundings and Atomic Structure (Set-5)
Two liquids A and B have the same temperature. A evaporates faster. The most likely reason is A has A
Continue readingChapter 27: Matter in Our Surroundings and Atomic Structure (Set-4)
On a humid day, sweat dries slowly mainly because the air has A High water vapour B Low air pressure
Continue readingChapter 27: Matter in Our Surroundings and Atomic Structure (Set-3)
When steam touches a cold surface and turns into water drops, the change is A Condensation B Evaporation C Freezing
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