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CBSE->Std 10 Questions

Total Questions 2595
What is known as the Universal Indicator?
give 10 examples for normal species.
let the resistance of an electrical component remains constant while the potential difference across the two ends of the component decreases to half of its formal value. what change will occur in the current through it?
which material is the best conductor?
which among iron and mercury is a better conductor?
will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source? why?
how much energy is given to each coulomb of charge passing through a 6 v battery?
what is the function of chlorophyll pigments?
how do guard cells control the opening and closing of stomata?
why are molecular movements needed for life?
How is the small intestine designed to absorb digested food?
what is the function of the digestive enzymes?
what is the role of acid in our stomach?
where do plants get each of the raw materials required for photosynthesis?
what are the differences between autotrophic and heterotrophic nutrition?
what process would you consider essential for maintaining life?
what are outside raw materials used for by an organism?
what criteria do we use to decide whether something is alive?
why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?
Balance the equation KMnO4+H2SO4+FeSO4->K2SO4+MnSO4+H2o+Fe2(SO4)3