Chemistry important questions and answers:
👉What is used in nuclear reactor as a moderator. It is also known as Heavy Water?
Ans -: Deuterium Oxide (D2O)
👉Which Metal is in liquid state at room temperature?
Ans -: Mercury
👉 elements are non-metal.
Ans -: Electro-negative
👉What is known as Artificial Silk.
Ans -: Rayon
👉 Nitrous Oxide (N2O) is also known as –
Ans -: Laughing Gas
👉Which compound is used to prepare water proof clothes?
Ans -: Calcium hydride
👉 Which Nobel Gas is also known as ‘Stranger Gas’?
Ans -: Xenon
👉 Which Acid is know as ‘Oil of Vitriol’?
Ans -: Sulphuric acid
👉For making of parachute, which polymeric substance used?
Ans -: Viscose
👉Acid rain is caused when the air is polluted by Gases.
Ans -: oxides of nitrogen and sulphur
👉All noble gases are &
Ans -: Colourless and Odourless
👉 is used as a Water Purifier.
Ans -: Alum
👉Aluminium is extracted from which ore?
Ans -: Bauxite
👉 The Process is used to synthesized Ammonia (NH3)?
Ans -: Haber’s Process
👉Which compound/acid commonly known as Aspirin?
Ans -: Acetylsalicylic Acid
👉gas used to fill Balloons.
Ans -: Helium
👉is also known as Baryta Water?
Ans -: Barium Hydroxide
👉Best sources for Vitamin D are –
Ans -: Sunlight & Fish liver
👉 Which gas is the chief component of Bio-gas?
Ans -: Methane
👉 is the purest form of Carbon found in Nature.
Ans -: Diamond
👉The Chemical name of ‘Washing Soda’ is –
Ans -: Sodium Carbonate
👉 What is the Chemical name of Chromic Acid?
Ans -: Chromium trioxide
👉Chemical name of Picric Acid is –
Ans -: Tri Nitro Phenol
👉 In Photography, which chemical used as a fixer.
Ans -: Sodium thiosulphate
👉What are used to control the chain reaction in a nuclear reactor?
Ans -: Cadmium rods
👉 In sunlight, Chloroform is converted into , a poisonous gas.
Ans -: Phosgene
👉 Which Vitamin contains Cobalt?
Ans -: Vitamin B12
👉 is one of the most common preservatives used in food processing industry?
Ans -: Benzoic Acid
👉Which compounds are responsible for permanent hardness of water?
Ans -: Sulphates and Chlorides of Calcium and Magnesium
👉The temporary hardness of water is caused of because of which compounds?
Ans -: Bicarbonates of Calcium and Magnesium
👉 Copper is extracted from which ore?
Ans -: Copper Pyrite
👉 When there is , Dead organisms are transformed into petroleum and natural
gas.
Ans -: Absence of air
👉 Deuterium is of Hydrogen.
Ans -: Isotope
👉the weight of iron is , when it is undergoing the process of ‘rusting’.
Ans -: Increases
👉Efficiency of the catalyst depends on its –
Ans -: Molecular State
👉 Egg shell is made up of .
Ans -: Calcium Carbonate
👉Which Vitamins are Fat Soluble?
Ans -: A, D, E & K
👉 Which was the First organic compound synthesized in a lab and it was done by whom?
Ans -: Urea by Friedrich Wöhler
👉Fuse wire is made up of .
Ans -: Lead and Tin
👉is used to coat Galvanised Iron.
Ans -: Zinc
👉Which Gases are used by sea divers for under water breathing?
Ans -: Oxygen & Helium
👉 gases are helpful for ripening of raw fruits.
Ans -: Ethylene & Acetylene
👉The found in an ore is known as Gangue.
Ans -: Impurities
👉 Iron is extracted from which ore?
Ans -: Hematite
👉 Kerosene is a mixture of .
Ans -: Aliphatic hydrocarbons
👉 Which Element is used for making of Lead pencil.
Ans -: Graphite
👉 The lightest metal is .
Ans -: Lithium
👉 is the main ore of Mercury.
Ans -: Cinnabar
👉Which Metal is found in the highest proportion in earth’s crust?
Ans -: Aluminium
👉Mine explosions are mostly caused by mixing of Air & .
Ans -: Methane
👉What is the compound used to in Nail polish remover?
Ans -: Acetone
👉 Natural rubber is a polymer derived from .
Ans -: Isoprene
👉The coating on non-stick cookware is of .
Ans -: polytetrafluoroethylene (PTFE) – TEFLON
👉The Nuclear Fusion on the Sun’s surface result into formation of Atoms.
Ans -: Helium
👉Organic Compounds are only soluble in .
Ans -: Non-polar solvents
👉. is also know as “FOOL’S GOLD”.
Ans -: Iron Pyrite
👉In an Oxidation process happens.
Ans -: Loss of electrons
👉Oxides of metals are .
Ans -: Alkaline
👉 The chemical composition of paper is that of a .
Ans -: Cellulose
👉 Paraffin wax is .
Ans -: Saturated hydrocarbon
👉 In which type of Rocks is Petroleum (Fossil Fuel) is found?
Ans -: Sedimentary Rocks
👉is also called White Gold.
Ans -: Platinum
👉Which is the purest form of Iron?
Ans -: Wrought Iron
👉Which Ore is used to extract Radium?
Ans -: Pitchblende
👉Solder is an alloy of .
Ans -: Tin and Lead
👉 Which Radioactive Isotope is used in Cancer treatment?
Ans -: Cobalt – 60
👉is the element common to all acids.
Ans -: Hydrogen
👉is created by Alloying Iron and Chromium.
Ans -: Stainless Steel
👉 The lustre of a metal is due to .
Ans -: Presence of free electrons
👉Which Mineral element is found in chlorophyll?
Ans -: Magnesium
👉The most abundant element in the earth’s crust is –
Ans -: Oxygen
👉The term ‘catalysis’ was coined by .
Ans -:Jöns Jakob Berzelius
👉Which element is the primary reason for radioactivity found in human body?
Ans -: Potassium – 40
👉Germanium, an ultra pure metal is purified by which method?
Ans -: Zone refining
👉Tooth enamel is made up of .
Ans -: hydroxyapatite, a mineral compound of calcium and phosphate
👉Which gas is filled inside a Tube light?
Ans -: Mercury Vapour & Argon
👉is an aqueous solution of Acetic acid.
Ans -: Vinegar
👉 Which Vitamins are Water Soluble?
Ans -: Vitamin B complex & Vitamin C
👉 Silver turns black (Tarnish) because of its reaction with .
Ans -: Sulphur
👉Melting of ice can be prevented with the use of –
Ans -: Gelatin
👉 Bee Sting contains which Acid?
Ans -: Formic Acid also known as Methanoic Acid. .
👉An Orange contains Acid.
Ans -: Citric Acid
👉 Etching of glass is done with the help of .
Ans -: Hydro fluoric acid (HF)
👉 Which acid is used in soft drinks?
Ans -: Carbonic acid (H2CO3)
👉 Silver Iodide is used as a ‘seed’ agent for making of –
Ans -: Artificial Rain
👉is used as a catalyst for the synthesis of Sulphuric Acid by Contact Process.
Ans -: Platinum (Pt)
👉Vanaspati Ghee is synthesized with the help of which catalyst?
Ans -: Nickle (Ni)
👉Swelling of bread takes place because of –
Ans -: Carbon dioxide
👉Cigarette lighters contain Gas.
Ans -: Butane
👉Which gas is used in fire extinguisher?
Ans -: Carbon dioxide
👉 is termed as ‘Metal of Future’.
Ans -: Titanium
👉 Safety matches are prepared using –
Ans -: Red Phosphorous
👉 A Photoelectric cell contains metal.
Ans -: Selenium
👉 Zinc Phosphide is used as?
Ans -: Rat Poison
👉 Which is the hardest substance found in human body?
Ans -: Tooth Enamel
👉 Ozone is an of Oxygen.
Ans -: Allotrope
👉Which Metal is naturally Anti-Bacterial?
Ans -: Copper
👉Which was the first element to be produced after Big Bang?
Ans -: Hydrogen
👉 If you pour a handful of salt into a glass of water, the water level will .
Ans -: Go Down
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