english

• bhit


  mound of sand
• After his parents died, Shah Latif spent the rest of his life on a mound
• That's why he was called the saint of bhit
• enzymes are specific in nature bc different enzymes have different active site their active site is complementary to the shape of its specific close susbtrate a substance on which enzymes react is known as substrate
• strong acids are hydrochloric acid,sulphuric acid,nitric acid,chloric acid.


  weak acids are nitrous acid,acetic acid,formic acid,hydroflouric acid
• what are strong accids

  hydrochloric acid, sulphuric acid, nitric acid , chloric acid
• strong base are lithium hydroxide, calcium hydroxide , potassium hydroxide


  weak base are ammonia , copper hydroxide , almunium hydroxide , zinc hydroxide
• ph stands for (potential of hydrogen) and it means that the measure of concentration of hydrogen ions (that is proton) in a substance.

  uses of baking soda is that it is used for making baking powder, it is used for making cold drinks, it is used for manufacture of fire extinguisher
• their valence shell contains seven electron and except arsenic (metal) all are non metal. flourine and chlorine are gas, bromine is liquid and iodine is solid at room temperature
• a substance dissolved in water is called aqeous solution.

  the component of solution which is in smaller amount is called solute.

  the component of solution which is in larger amount is called solution.

  sixth period is called long period and it contains 32 elements.fourteen elements are called lanthanides and are placed at the bottom of a periodic table
• ionic compounds are held together by an electrostatic force of attraction between cation and anion. thus they cannot move in their solid state. when they are dissolved in molten form the ions seperate and break and they move freely and conduct electricity
• chemical formula of chili salt pepper is Nano3 and bleaching powder is Ca(OH)2
• uses of enzymes are in food, medicine, and industry
• in meiosis, the mother cell divides into 4 cells having the same number of chromosomes in fertilization, male and female gametes fuse to make zygotes with the same number of chromosomes as parent cells