General Knowledge For FPSC, PPSC, NTS, CSS And Various Exams CHEMICAL FORMULAE Part 8

General Knowledge For FPSC, PPSC, NTS, CSS 

And Various Exams  

(CHEMICAL FORMULAE) 

Part 8

• Lead and tin are used in solder.
• Caffeine, a constituent of tea and coffee is a diuretic.
• Citric Acid is used in soft drinks.
• A substance, which radiates light when heated to a high temperature, is said to be incandescent.
• Light waves are electromagnetic.
• If a solution of pH 6 is diluted by 100 times, the resulting solution would be Acidic.
• Acid rain is caused due to emission of oxides of nitrogen and sulphur.
• Hydrogen iodide is used for writing on glass.
• Infrared radiation has the longest wavelength.
• Stainless steel cooking pans are fabricated with copper bottom because conductivity of copper is greater that that of stainless steel.
• Sucrose is the sweetest natural sugar among glucose, fructose and lactose.
• Lead is used in storage batteries.
• Nobel gases are so called due to their chemical inertness.
• Alum is not present in cement.
• Due to continuous use of calcium superphosphate as fertilizer in soil, the pH of soil becomes more than 7.
• Among the fertilizers used, urea contains maximum % of N.
• Potassium magnesium sulphate is called the muraite of potash.
• Sodium acetate salt when dissolved in water makes the solution basic.
• Yellow colour of usual nitric acid is due to the presence of N2O5.
• Astatine is the rarest naturally occurring element on earth.
• Nitrogen and carbon are most essential for building cells in the human body.
• Among the sedimentary rocks, limestone is of organic origin.
• Red Hematite is an ore of iron.
• Radiocarbon dating is used to find the age of fossils.
• Which of the following is used as raw material for the
• manufacture of rayon? Cellulose
• Saponification is the process that makes what common product: Soap
• If an alloy is an amalgam what metal must it contain-Mercury
• An example of inorganic compound is carbon monoxide.
• ATP is a molecule containing high-energy bonds.
• Sand, Soda and what are the main ingredients of glass- Limestone
• Which acid dissolves glass- Hydrofluoric Acid.
• What colour is iridium-Steel Grey
• What gives onions their distinctive smell- Sulphur - taken in when growing