Explore topic-wise InterviewSolutions in Current Affairs.

Define basicity of an acid and acidity of a base. On the basis of these, explain the classification of acids and bases. Give suitable examples.

Deficiency of potassium iodide causes goitre in human beings.

Decomposition of solid ammonium chloride is associated with ___________ change.

CuSO_(4)+XtoXSO_(4)+Cu,CuSO_(4)+YtoYSO_(4)+Cu,XSO_(4)+YtoNo reaction , CuSO_(4)+ZtoNoreaction,ArrangeCu , X, Y and Z in the ascending order of reactivity.

Cotton clothes can be made more easily wet than synthetic clothes. Explain.

Corrosionof a metal involves change in _______.

Copy and complete the following table. {:(,"Only one free surface",,),("Solid",,,),(,,,"Spontaneous and rapid diffusion"):}

Copper is mixed with gold to make ornaments because alloying

Composition of water gas is ……………..

Compare three different states of matter with respect to the arrangement of molecules and their related parameters.

Compare the density of water at 4^(@)C with that below and above 4^(@)C.

Compare solids, liquids and gases with respect to their physical properties.

Compare physical properties of metals and nonmentals

Compara the mass of proton , neutron and electron?

Common salt is a mixture of

{:(,"Column-A",,,"Column-B"),((A),"Sublimation",(),(a),NaCl+"water"),((B),"Filtration",(),(b),"Iodine+sand"),((C),"Evaporation",(),(c),"Sawdust+water"):}

{:(,"Column A",,,"Column B"),(A.,"Sedimentation","()",a.,"Softened water"),(B.,"Filtration","()",b.,"Additional of alum"),(C.,"Chlorination","()",c.,"Removal of suspended impurities"),(D.,"Permutit","()",d.,"Purification of drinking water"):}

{:(,"Column A",,,"Column B"),(A.,"Sodium dihydrogen phosphate",(),a.,"Basic salt"),(B.,"Calcium hydroxy chloride",(),b.,"Gun powder"),(C.,"Nitre",(),c.,"Manufacture of glass"),(D.,"Ammonium carbonate",(),d.,"Acidic salt"),(,,(),e.,"Normal salt"),(,,,f.,"Smelling salt"):}

{:(,"Column A",,,"Column B"),(A.,"Removal of hardness by boiling","()",a.,"Resins"),(B.,"Clark's method","()",b.,"Can remove temporary and permanent hardness"),(C.,"Addition of washing soda","()",c.,"Decomposition reaction"),(D.,"Ion exchange method","()",d.,"Addition of slaked lime"):}

{:(,"Column A",,,"Column B"),(A.,"Potable water","()",a.,"Electrolysis"),(B.,"Distilled water","()",b.,"Irrigation"),(C.,"Acidulated water ","()",c.,"Pure water"),(D.,"River water","()",d.,"Laboratory purpose"),(,,"()",e.,"Human consumption"):}

{:(,"Column A",,,"Column B(Acidic)"),(A.,"Methyl orange",(),a.,"Red"),(B.,"Phenolphthalein",(),b.,"Yellow"),(C.,"Turmeric",(),c.,"Colourless"),(D.,"Litmus",(),d.,"Blue"),(,,(),e.,"Pink"):}

{:(,"Column A",,,"Column B"),(A.,"Hard water","()",a.,"Reverse osmosis"),(B.,"Soft water","()",b.,"Rain water"),(C.,"Desalinated water","()",c.,"Presence of "Ca^(+2)andMg^(2+)),(D.,"Lake water","()",d.,"Scum formation"),(,,"()",e.,"Lather formation"):}

{:(,"Column A",,,"Column B"),(A.,"Nitric acid",(),a.,"Weak acid"),(B.,"Phosphoric acid",(),b.,"Strong acid"),(C.,"Calcium hydroxide",(),c.,"Car batteries"),(D.,"Sulphuric acid",(),d.,"Bleaching powder"),(,,(),e.,"Baking powder"):}

{:(,"Column A",,,"Column B"),(A.,"Green vitriol",(),a.,Na_(2)CO_(3) 10H_(2)O),(B.,"Blue vitriol",(),b.,MgSO_(4) 7H_(2)O),(C.,"Epsom salt",(),c.,FeSO_(4) 7H_(2)O),(D.,"Washing soda",(),d.,CuSO_(4) 5H_(2)O),(,,(),e.,CaSO_(4) 1//2 H_(2)O):}

{:(,"Column A",,,"Column B"),(A.,"Defecation by living being","()",a.,"Arsenic, mercury etc"),(B.,"Industrial operation","()",b.,"Intesecticides, fungicides etc"),(C.,"Thermal pollution","()",c.,"Amoeba, fungicides etc"),(D.,"Agricultural activities","()",d.,"Favourable for growth of algae"):}

{:(,"Column A",,,"Column B"),(A.,"Efflorescent",(),a.,"Cobalt chloride"),(B.,"Deliquescent",(),b.,"Sodium chloride"),(C.,"Hygroscopic",(),c.,"Zinc chloride"),(D.,"Food additive",(),d.,"Mercuric nitrate"),(,,(),e.,"Washing soda"):}

{:(,"Column A",,,"Column B"),(A.,"Carbonic acid",(),a.,"Baking Powder"),(B.,"Tartaric acid",(),b.,"Antacid"),(C.,"Caustic soda",(),c.,"Soft drinks"),(D.,"Milk of magnesia",(),d.,"Additive in food stuffs"),(,,(),e.,"Soap industry"):}

Cold countries, water pipes burst in winter. Explain.

CO_(2) can be used to preserve food grains from destruction by insects.

CO_(2) can be clooected by the downward displacement of air.

Clood formation almost doesn't take place in the stratoshere because

Classify the elements based on atomicity with examples.

Chile salt petre is used in the manufuacture of _________ (nitric acid/ nitrous acid)

Chile salt petre is used in the manufuacture of nitric acid.

Chile salt petre and nitre are respectively

Chemical treatment of surface water can be carried out by the addition of

White lead is

Cement replaces lime mortar in thefield of construction. Explain.

Cation exchange resin is regenerated by passing HCl solution.

Carbonic acid is a _______ acid. (strong/ weak)

Carbon dioxide on dissolution in water forms ______.

Carbon dioxide is used for extinguishing fires caused by petroleum products but not fires caused by metals like Na or Mg. Explain.

Carbohydrates are the compounds of carbon, hydrogen and oxygen.

Carbogen is a mixture of 94% oxygen 4% carbon and 2% nitrogen dioxide.

Camphor pellets should be preserved in air tight containers. Give reasons.

Calculate the volume of nitrogen, oxygen and carbon dioxide in 750 1 of air.

Calculate the ratio of the amount of heat energy lost during the conversion of 20 g of water at 0^(@)C to ice at 0^(@)C to heat energy gained during the conversion of same amount of water at 100^(@)C to steam at 100^(@)C.