[{"id":226211,"question":"Which substances is called chrome yellow.","choices":[{"text":"Pb3O4","value":"A"},{"text":"PbO","value":"B"},{"text":"2PbCO3.Pb(OH)2","value":"C"},{"text":"PbCrO4","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":226210,"question":"Lead monoxide is","choices":[{"text":"Amphoteric","value":"A"},{"text":"Neutral","value":"B"},{"text":"Acidid","value":"C"},{"text":"Basic","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":226209,"question":"Litharge is chemically","choices":[{"text":"PbO","value":"A"},{"text":"PbO2","value":"B"},{"text":"Pb3O4","value":"C"},{"text":"Pb(CH3COO)2","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":226208,"question":"The composition of white lead is","choices":[{"text":"PbCO3.Ph(OH)2","value":"A"},{"text":"PbCO3.2Pb(OH)2","value":"B"},{"text":"2PbCO3.Pb(OH)2","value":"C"},{"text":"PbCO3","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":226207,"question":"Which one of the following compounds of lead is red in colour","choices":[{"text":"PbO","value":"A"},{"text":"Pb2O","value":"B"},{"text":"Pb3O4","value":"C"},{"text":"PbCO3","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":226206,"question":"Which substance is water repellant and used in ceramic insulators.","choices":[{"text":"Asbestos","value":"A"},{"text":"Lead compounds","value":"B"},{"text":"Silicon carbide","value":"C"},{"text":"silicones","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":226205,"question":"silicones are","choices":[{"text":"Some salts of sodium","value":"A"},{"text":"Allotropes of SI","value":"B"},{"text":"Inorganic polymers","value":"C"},{"text":"Coloured compounds of Si","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":226204,"question":"The shape of SiO2 IS","choices":[{"text":"Tetrahedral","value":"A"},{"text":"Trigonal bipyramid","value":"B"},{"text":"Linear","value":"C"},{"text":"Cubic","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":226203,"question":"In which substance silicon is not present.","choices":[{"text":"Talc","value":"A"},{"text":"Asbestos","value":"B"},{"text":"Dolomite","value":"C"},{"text":"Zirocon","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":226202,"question":"Which are correct oxidation states for lead","choices":[{"text":"+1, +2","value":"A"},{"text":"+3 , +5","value":"B"},{"text":"+2 ,+4","value":"C"},{"text":"+4 only","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":226201,"question":"Aluminium is used for making petrol and milk storage tanks because it is","choices":[{"text":"Conductor","value":"A"},{"text":"Non magnetic","value":"B"},{"text":"Excellent reflected","value":"C"},{"text":"Corrosion resistant","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":226200,"question":"Which element burns in nitrogen atmosphere to form nitride.","choices":[{"text":"Mg","value":"A"},{"text":"Al","value":"B"},{"text":"Both a and b","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":226199,"question":"Al reacts with caustic soda to form","choices":[{"text":"Sodium aluminates","value":"A"},{"text":"Aluminium hydroxide","value":"B"},{"text":"Aluminium oxide","value":"C"},{"text":"sodium tetra aluminate","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":226198,"question":"Aluminium does not corrode because.","choices":[{"text":"It is a semi metal","value":"A"},{"text":"It is a silver shining metal","value":"B"},{"text":"It does not react with O2","value":"C"},{"text":"It forms a protective layer of Al2O3","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":226197,"question":"Ortho boric acid on strong beating gives.","choices":[{"text":"Borax","value":"A"},{"text":"Boron oxide","value":"B"},{"text":"Metaboric acid","value":"C"},{"text":"Tetraboric acid","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":226196,"question":"Which is not used of Borax","choices":[{"text":"Softening of water","value":"A"},{"text":"As medicine for washing eyes","value":"B"},{"text":"As flux in metallurgical operations","value":"C"},{"text":"To make quartz","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":226195,"question":"A solution of borax in water is.","choices":[{"text":"Acidic","value":"A"},{"text":"Alkaline","value":"B"},{"text":"Neutral","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2}]