Chemistry: Most Important One Liner Question and Answer part- 9

Chemistry: Most Important One Liner Question and Answer part- 9

 

• Which gas used as a chemical weapon in the first world war – Mustard gas
• RDX was invented by – Henning
• The two elements that are frequently used for making transistors are – Silicon and germanium
• Rodenticide is the chemical which is used to control – Mouse
• The important metal used with iron to make it rust free – Chromium
• Which catalyst is used in hydrogenation of vegetables oil – Nickel
• An Emulsion is a colloid of a – Liquid in a Liquid
• Which one is used for sun glasses – Crooks glass
• The total number of lanthanide elements is – 14
• First of all, the elements were classified by - Newland
• The element having lowest melting point in periodic table is – He
• The calculation of electronegativities was first done by – Pauling
• Electron affinity of noble gases is - Almost zero
• Combustion is a – Chemical Process
• What are isobars – elements with different atomic number but same mass number
• How are ‘Cations’ formed – Removal of electron
• How are ‘anions’ formed – addition of electron
• Match stick uses the allotrope of Phosphorous – Red Phosphorous
• Which metal is extracted from sea water – Magnesium
• Oxygen is a – Combustion nourishing
• Dry powder fire extinguisher contains – sand and sodium bicarbonate
• What is Asbestos – Calcium magnesium silicate
• Which metal is protected by the layer of its own oxide – Aluminium
• Which one is used in pencils – graphite
• Who discovered benzene – Michael Faraday
• What is a wood spirit – Methyl Alcohol
• Chloroform can be used as – Anaesthetic
• Table salt (Nacl) is a product of – Strong acid and strong base
• ______ is used to prepare fire proof and water proof clothes. – Calcium hydride
• Galvanised iron is coated with – Zinc
• Chemical name of Chromic Acid is – Chromium trioxide
• Which metal is used in Photoelectric cell – Selenium
• Barium Hydroxide is also known as – Baryta Water
• ______ elements are non-metal. – Electronegative
• __________ is known as heavy water and used in nuclear reactor as moderator. – Deuterium Oxide (D2O)
• Deuterium is ______ of Hydrogen. – Isotope
• Ozone is _______ of Oxygen. – Allotrope
• Ammonia (NH3) is synthesized through? – Haber’s Process
• Chlorine is used to prepare _________ – PVC, Insecticides,
• Which catalyst is used for the synthesis of Vanaspati Ghee? –Nickle (Ni)
• Which catalyst is used for the synthesis of Sulphuric Acid by Contact Process? – Platinum (Pt)
• Chemical name of Picric Acid is? – Tri Nitro Phenol
• ______ is known as laughing gas? – N2O
• Chloroform in sunlight forms poisonous gas – Phosgene
• Platinum is also called – White Gold
• Which material is used in making of safety matches – Red Phosphorous
• Nail polish remover contains – Acetone
• Which acid is present in Orange – Citric Acid
• Lead pencil contains – Graphite
• Which gas is used in filling electric bulbs – Argon
• Lightest metal – Lithium
• Acid rain is due to air pollution by – Nitrous Oxide & Sulphur dioxide
• Ozone is – Diamagnetic
• Petroleum is found in – Sedimentary Rocks
• All noble gases are – Colourless and Odourless
• The most abundant element in the earth’s crust is – Oxygen
• The lustre of a metal is due to – Presence of free electrons
• Which gas is used in fire extinguisher – carbon dioxide
• The mot abundantly occurring element in the earth-crust is – oxygen
• Which is the major constituent of soda lime glass – calcium oxide
• How many atoms are present in one molecule of Ozone – 3
• An alloy is an example of – Sodium solution
• Which metal is responsible for Itai-Itai disease – Cadmium
• The important nitrogenous compound used in fertilizer is – Calcium cyanamide
• What is also called soda ash – Sodium Carbonate
• Anode rays consist of – Positive Particles
• Which nonmetal is lustrous – Iodine
• Aluminium is extracted from which ore – Bauxite
• Copper is extracted from which ore – Copper Pyrite
• Chemical name of ‘Washing Soda’ is – Sodium Carbonate
• Gases used in welding are – Acetylene & Oxygen
• Gases used by sea divers for breathing are – Oxygen & Helium
• Best sources for Vitamin D are – Sunlight & Fish liver
• Zinc Phosphide is used as – Rat Poison
• Fuse wire is made up of – Lead and Tin
• Purest form of Iron is – Wrought Iron
• Radium is extracted from – Pitchblende
• Which agent is as ‘seed’ in artificial rain – Silver Iodide
• Oxides of metals are– Alkaline
• During the process of ‘rusting’, the weight of iron – Increases
• ______ (metal) is liquid at room temperature. – Gallium
• What is the formula of common salt – NaCl
• What is the maximum number of electrons that a p-orbital can hold – 6
• What is used in fire extinguisher – Sodium bicarbonate
• What is the nature of metal oxides – Basic
• Which gas burns with popping sound – Hydrogen
• Which metal is used for galvanization – Zinc
• What is the nature of bleaching powder – Oxidising agent
• Which is stored in Kerosene – Sodium
• Phenolphthalein gives which color in acidic medium – Colourless
• Which gas is used in cigarette lighters – Butane
• Biogas chiefly contains – Methane
• Chemical used as fixer in Photography is – Sodium thiosulphate
• Aspirin is – Acetyl Salicylic Acid
• _____ is also known as ‘Stranger Gas.’ – Xenon
• Natural rubber is a polymer derived from ______. – Isoprene
• ‘Oil of Vitriol’ is – Sulphuric acid
• Paper is chemically – Cellulose
• Impurity present in ore is – Gangue
• What is the chemical formula of Baking Soda – NaHCO3