Chemistry 9

ഹൈഡ്രജൻ, ഓക്സിജൻ, നൈട്രജൻ, തുടങ്ങിയ വാതകങ്ങളുമായി ബന്ധപ്പെട്ട ചോദ്യങ്ങളാണ് ഇന്നത്തെ പാഠത്തിൽ

• Hydrogen was discovered by

                  Henry Cavendish

• Meaning of the word Hydrogen

                  Water producer

• Based on atomic mass which is the smallest atom

                  Hydrogen

• Which is considered as the simplest atom\lightest gas

                  Hydrogen

• Largest atom

                  Francium

• Densest atom

                  Radon

• Element which produces largest number of compounds

                  Hydrogen

• Non metal element which showing metalic characters

                  Hydrogen

• Element which is not included in any group

                  Hydrogen

• Element which is present in all acids

                  Hydrogen

• Element which has the second lowest boiling point and melting point among all substances

                  Hydrogen

• Gas which burns blue in color

                  Hydrogen

• Element that does not have neutrons in atom

                  Hydrogen

• Gas which is used for making Vanaspati ghee

                  Hydrogen

• Hydrogen is not using for domestic purpose because of its 

                  Explosive nature

• Fuel used in rockets

                  Liquid Hydrogen

• Which is known as fuel of future

                  Hydrogen

• Fuel which doesn't cause any pollution

                  Hydrogen

• Isotops of Hydrogen are

                  Protium, Deuterium, Tritium

• Which isotope of Hydrogen is considered as the ondinary Hydrogen

                  Protium

• Which is called as heavy Hydrogen

                  Deuterium

• Chemical name of Heavy water

                  Deuterium Oxide

• Chemical name of Super heavy water

                  Tritium Oxide

• Most abundant isotope of Hydrogen

                  Protium

• Simplest radio active element\Radio active isotope of Hydrogen

                  Tritium

• Isotops which are using for the manufacturing of Hydrogen bomb

                  Deuterium, Tritium

• Most abundant compound present in animals and human body

                  Water (About 65-70% of bodymass)

• Scientist who proved that water is a compound of Hydrogen and Oxygen

                  Henry Cavendish

• The matter which can exist in Solid, Liquid and gaseous forms

                  Water

• High boiling point of water is due to

                  Hydrogen bonding

• Which is known as universal solvent

                  Water

• Chemical name of water

                  Dihydrogen monoxide (H2O)

• Purest water in nature

                  Rain water

• Temporary hardness of water is due to the presence of 

                  Bicarbonates of Calcium and Magnesium

• Temporary hardness of water can be removed by

                  Repeated boiling or adding lime

• Permanent hardness of water can be removed by

                  Distillation or by adding Sodium Carbonate (Washing soda)

• Gas which has the smell of rotten eggs

                  Hydrogen Sulphide

• Compound of Hydrogen using as bleaching agent

                  Hydrogen peroxide (H2O2)

• Compound of Hydrogen which has the structure of an open book

                  Hydrogen peroxide

• Gas which helps substances to burn but doesn't burn itself

                  Oxygen

• Number of atoms present in Oxygen molecule

                  2

• Number of atoms present in Ozone molecule

                  3

• Hydrogen and Oxygen are named by

                  Lavoisier

• Gas which is colorless, tasteless and odourless

                  Oxygen

• Color of Oxygen and Ozone in solid and liquid form

                  Light Blue

• Atmospheric layer in which Ozone is present

                  Stratosphere

• Substance which deplete the Ozone layer

                  Chlorofluoro Carbon (CFC)

• Industrial name of CFC

                  Freon

• Element in CFC which destroys ozone 

                  Chlorine

• Gases used in aquatic lungs of sea divers for respiration

                  Mixture of Helium and Oxygen

• Nitrogen was discovered by

                  Daniel Rutherford

• Main content of protein

                  Nitrogen

• Examples of Nitrogen fixing bacterias

                  Rhizobium, Axetobacter, Clostridium

• Nitrogen compound which is used in photographic plates

                  Silver Nitrate

• Most nitrogenized fertilizer

                  Urea

• Gas formed in atmosphere during lightning

                  Nitrogen dioxide

• RDX stands for

                  Research Department Explosive

• Explosive known as cyclonite

                  RDX

• Explosive known as trotyl

                  TNT
                                                                                              (To be Continued...)