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Chemical Substances Nature And Behaviour

Class 10 Science के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

ScienceWhy is it proper to protect bleaching powder from moisture and open air?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium SciencePlant roots are not growing well in highly acidic soil. Which substance will be useful in a suitable amount?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceWashing soda helps remove which ions from hard water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceIf a solution of pH 2 is compared with a solution of pH 5, how much more acidic is the first solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Hard ScienceA sample is heated, gas is released, and the solution of the remaining solid is basic. If the sample was baking soda, what is the remaining solid?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceWhat is the main chemical reason for the effect of acid rain on marble?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceA student says sodium chloride is neutral, so its solution will not have ions. Why is this wrong?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceIf a solution can damage tooth enamel, in which pH range is it more likely to be?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceA substance gives carbon dioxide with acid and forms a basic solution in water. Which substance is most suitable?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceWhy can sodium hydroxide pellets become wet and then less pure in open air?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Hard SciencePhenolphthalein is colourless and methyl orange is red in a solution. What is the nature of this solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceGypsum forms plaster of Paris on controlled heating. Why is excessive heating a problem?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Hard ScienceBy which test can the gas formed at the cathode in the chlor-alkali process be identified?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceA gas turns moist blue litmus red but has no effect on dry blue litmus. What does this prove?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceWhich is the safe method for mixing acid with water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceIf an acid is less electrically conducting than another acid of the same concentration, what is the most appropriate conclusion?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Hard ScienceAn acid is added to a white solid and a gas evolves that turns lime water milky. Excess of the same gas removes the milkiness. What is the final soluble substance?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Hard ScienceAn unknown salt solution shows pH 8.5 and turns red litmus blue. What type of salt is it most likely to be?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium ScienceAn acidic solution has pH 4. If it is made one thousand times less acidic, what will be the approximate new pH?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Hard ScienceIn an experiment, solution A turns blue litmus red and solution B turns red litmus blue. When mixed in suitable amounts, the temperature rises slightly. This proves which reaction?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 11Medium