Last seen: Jan 25, 2021
(i) Aluminium sulphate (ii) Calcium chloride (iii) Potassium sulphate (iv) Potassium nitrate (v) Calcium carbonate
It is not possible to see an atom with naked eye because of its extremely small size (atomic radius is of the order of 10-10 m).
Atomic mass unit is defined as the mass unit equal to exactly one-twelfth (1/12th) of the mass of one atom of carbon-12. It is denoted by u (unified m...
The postulate that “A chemical compound always consists of the same elements combined together in the same proportion by mass” is the law of definite ...
The postulate that “atoms can neither be created nor destroyed in a chemical reaction” is the result of the law of conservation of mass.
∵ 1 g of hydrogen reacts with = 8 g of oxygen ∴ 3 g of hydrogen reacts with = 8 × 3 = 24 g of oxygen Thus, 24 g of oxygen gas would be required to...
Total mass of reactants = mass of sodium carbonate + mass of ethanoic acid = 5 – 3 g + 6 g = 11.3 g Total mass of products = mass of sodium etha...
(a) When the solid or liquid is dispersed in a gas it is called aerosol e.g. smoke. (b) When smoke mixes with fog it forms smog. (c) Rita’s fath...
(a) Density of any substance is defined to be the mass of the substance per unit volume. (b) One can add some cheap gases or compressed air in the ...
(a) If the labour immediately enters the manhole on removing its lid he would die due to suffocation and inhalation of poisonous gases which are compr...
(a) The principle of separating funnel is difference in the densities of two liquids. (b) Liquid mixtures can be separated by distillation and frac...
(a) Sand + iron - magnetic separation (b) Cream from milk - centrifugation (c) Salt + water - evaporation (d) Ammonium chloride + NaCl - sublima...
(a) Solution: It is a homogeneous mixture of two or more substances. It consists of solute and solvent. (b) Different types of solution: (i) Bas...
Different colloids are formed due to different dispersed phase and dispersing 2s.png
The difference between true solution, colloidal solution and suspension Property 1. Particle size 2. State 3. Tyndall effect (scattering of li...
Concentration of solution = Mass of solute/(Mass of solute + Mass of solvent) x 100 Mass solute = 20 g Mass of solute + solvent = 220g Concentra...
Fog is a colloidal solution with liquid dispersed in gas. Smoke is a colloidal solution with solid dispersed in gas.
Saturated solution is said to be saturated at a given temperature when there is no more scope of solute particles to dissolve /dissociate into water. ...
Water is a compound because if we pass electricity through it then at two different electrodes, we get two different gases i.e., oxygen and hydrogen d...
Air is considered as a mixture because it exhibits following properties: Each component present in air retains its properties. Each component can...