Get the all answers of all the questions in the detail and complete them from an in-depth understanding. We have covered the all questions based on the old and rationalized NCERT syllabus.
Perform chemical tests such as adding a few drops of universal indicator or pH paper to check if the liquid has a pH of around 7, indicating neutrality.
How would you confirm that a colourless liquid given to you is pure water? Read More »
Saturated solution is a solution that cannot dissolve any more solute at a given temperature and pressure
Technique called fractional distillation. This process involves heating the mixture to a temperature between the boiling points of kerosene and petrol.
(a) Sodium chloride from its solution in water: Evaporation
(b) Ammonium chloride from a mixture containing sodium chloride and ammonium chloride: Sublimation
Which separation techniques will you apply for the separation of the following? Read More »
Cutting of trees: Physical Change, Melting of butter in a pan: Physical Change, Rusting of almirah: Chemical Change, Boiling of water to form steam: Physical Change, etc.
Classify the following as chemical or physical changes: Read More »
Crystallisation is used to separate homogeneous mixtures, specifically solutions where the solute can form crystals.
What type of mixtures are separated by the technique of crystallisation? Read More »
Butter from curd, we can use the technique of churning (Centrifugation), salt from seawater, process of evaporation, camphor from salt, we can use the technique of sublimation.
A solution is a homogeneous mixture, meaning its components are evenly distributed throughout and cannot be easily separated by physical means like filtration.
Concentration of the saturated solution of sodium chloride at 293 K is approximately 0.358 g/mL.
To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water Read More »
Sols as having small floating particles, solutions as clear mixtures with tiny particles dissolved, and suspensions as having visible particles that may settle down over time.
How are sol, solution and suspension different from each other? Read More »
These points highlight the fundamental differences between homogeneous and heterogeneous mixtures in terms of their composition, appearance, and behavior.
Substances can exist in various forms, including solids, liquids, and gases. Examples of substances include water (H2O), salt (NaCl), oxygen (O2), and iron (Fe).
