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  METAL Metal is a element that has metallic bond and have positive ions or cations. Metal is a lattice of positive ions that are surrounded by the cloud of the electrons. In the pure state, metal have a shining surface. This properties are called metallic luster . Here, metals are generally hard. Metals are malleable, because they can be hammered into thin sheets. This property is called as malleability . Metals are ductile it means they can be drawn into wires. The ability of the metals to be drawn into thin wires is called as ductility . For example:--   gold is most ductile metal. Due to the properties of the ductility and malleability, metals can be given in different shapes as per their needs. Metals are opaque Metals are lustrous elements that are good conductor of heat and electricity. Metals are denser than the other substances. Metals are good conductor of heat. For example :-- silver and copper. Lead and mercury are poor conductors of heat. ...

Bleaching powder   Bleaching powder is an inorganic compound by nature. its chemical formula is CaOCl 2 and also called as calcium oxychloride. It is soluble in water. Bleaching powder is prepared by the action of the chlorine on dry slaked lime (Ca(OH) 2 ) . Ca(OH) 2   + Cl 2    →   CaOCl 2    +    H 2 O   Uses for bleaching powder:--   It is used to make drinking water and remove the germs. It   is used as oxidising agent in chemical industries. It is also used for washing clothes in laundry. It is used for bleaching cotton and linen in the textiles industries. It is used for bleaching wood pulp in paper factories. It is also used for sanitization of the public swimming pools. And also it is used for disinfect the drinking water.       Properties of the bleaching powder Its chemical name is calcium hypochlorite. The formula is Ca(OCl) 2 It is also called as chlori...

  How strong are acid or base solutions?   Acid-base indicators are used to distinguish between and acid and a base. A scale for measuring the hydrogen ion concentration in a solution is known as pH scale. pH is a scale which is used to specify the acidity or basicity of an aqueous solution. pH scale is logarithmic. The p in pH stands for Potenz in German which means that power. And it is inversely indicates the concentration of hydrogen ion in the solution. On the pH scale , pH is generally measure from 0 (very acidic) to 14 (very alkaline). The higher the hydronium ion concentration , the lower is the pH value. The solution with the pH value are neutral solution. Example:-- water. The neutral value of the pH value depends on the temperature. The solution with pH less than 7 are acidic solution. The pH value can be less than 0 for very strong acids. The solution with pH value greater than the 7 are basic solution. The pH value can be more than the 14 fo...

  What do all acids and all bases have in common? Here, All acids have similar chemical properties. All acids produce Hydrogen Gas on reacting with the metals. acids and bases produces ions in water. Acids release hydrogen ions (H + ) and bases release hydroxide ions ( OH + ).   Explanation:-- Let us take a solution of the glucose , alcohol , hydrochloride acid , sulphuric acid. Take a cork and two nails are fixed into the cork and placed into the beaker Connect the nails to the terminals of a 6 volt battery through a bulb and a switch. Put the some dilute HCl in the beaker and switch on the current Repeat the same with dilute sulphuric acid Here we found that the bulb starts glowing in the case of the acids. But we observe that glucose and alcohol solutions do not conduct electricity. When the bulbs gets glowing it indicates that the there Is flow of the electricity through the solutions by ions.   Acids contains H + ion as cation and anion such ...

  Acids:--                An acid is a molecule or ion that is capable of donating a proton that is hydrogen ion (H + ) or capable of formation of a covalent bond with an electron pair. Acid:-- In the water solution, any substances whose tastes are sour and whose dissolve in water to release H + ions and reacts with bases to form salts and promotes certain chemical reactions and also change the colour of certain indicators. This is known as acid.   Properties of acids:-- Acids is sour in taste Acids react with base to form salt Acid reacts with metal to release hydrogen ions H + The pH value is less than 7 Acid converts blue litmus paper to red litmus paper Acid have tendency to corrode the metal surfaces     Bases:--             Bases are the substances which dissociates solution to form hydroxide ion OH - ...

  Types of chemical reactions A chemical reaction is the process to involve the breaking and making or formation   of chemical   bonds between atoms to produce new substances is known as chemical reaction . A chemical reaction is the chemical transformation in which   one type of substance which is reactants reacts chemically and converts   into a new substances which is products. There are different types of chemical reaction :--   1. Combination   reaction:---                                            In this combination reaction, single products is formed from two or more reactants is known as combination reactions. Combination reactions is also called as synthesis reaction Example :--        ...