1.Compounds responsible for permanent hardness of water? – Sulphates and Chlorides of Calcium and Magnesium
2.Gases used for ripening raw fruits? –Ethylene & Acetylene
3.Main ore of Mercury is? –Cinnabar
4.Egg shell is made up of? – Calcium Carbonate
5.______ is known as Artificial Silk. – Reyon
6.Water soluble Vitamins – B & C
7.Fat Soluble Vitamins – A, D, E & K
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8.Common preservative in food processing industry is? – Benzoic Acid
9.First organic compound synthesized in laboratory & by whom? – Urea by Friedrich Wöhler
10.What blackens silver’s shine? – Ozone Gas
11.Substance used in Cancer treatment? – Cobalt – 60
12.Cobalt is found in? – Vitamin B12
13.Iron is extracted from which ore? –Hematite
14.Aluminum is extracted from which ore? –Bauxite
15.Copper is extracted from which ore? – Copper Pyrite
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16.Chemical name of ‘Washing Soda’ is? – Sodium Carbonate
17.Gases used in welding are _______? – Acetylene & Oxygen
18.Gases used by sea divers for breathing are ____? – Oxygen & Helium
19.Best sources for Vitamin D are? – Sunlight & Fish liver
20.Zinc Phosphide is used as? – Rat Poison
21.Fuse wire is made up of ______ – Lead and Tin
22.Purest form of Iron is? – Wrought Iron
23.Radium is extracted from ______ . – Pitchblende
24.Which agent is as ‘seed’ in artificial rain? – Silver Iodide
25.Oxides of metals are ______ . – Alkaline
26.During the process of ‘rusting’ , the weight of iron ______ . –Increases
27.______ (metal) is liquid at room temperature. – Gallium
28.______ is used to prepare fire proof and water proof clothes. – Calcium hydride
29.Galvanised iron is coated with? – Zinc
30.Chemical name of Chromic Acid is? – Chromium trioxide
31.Which metal is used in Photoelectric cell? – Selenium
32.Barium Hydroxide is also known as? – Baryta Water
33.______ elements are non-metal. – Electronegative
34.__________ is known as heavy water and used in nuclear reactor as moderator. – Deuterium Oxide (D2O)
35.Deuterium is ______ of Hydrogen. – Isotope
36.Ozone is _______ of Oxygen. – Allotrope
37.Ammonia (NH3) is synthesized through? – Haber’s Process
38.Chlorine is used to prepare _________ – PVC, Insecticides,
39.Which catalyst is used for the synthesis of Vanaspati Ghee? –Nickle (Ni)
40.Which catalyst is used for the synthesis of Sulphuric Acid by Contact Process? – Platinum (Pt)
41.Chemical name of Picric Acid is? – Tri Nitro Phenol
42.______ is known as laughing gas? – N2O
43.Chloroform in sunlight forms poisonous gas ________ . – Phosgene
44.Platinum is also called _____ . – White Gold
45.Which material is used in making of safety matches? – Red Phosphorous
46.Nail polish remover contains? – Acetone
47.Which acid is present in Orange? –Citric Acid
48.Lead pencil contains _____ . –Graphite
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49.Which gas is used in filling electric bulbs ______ ? – Argon
50.Lightest metal? – Lithium
51.Acid rain is due to air pollution by? – Nitrous Oxide & Sulphur dioxide
52.Ozone is _______ . – Diamagnetic
53.Petroleum is found in ______ . – Sedimentary Rocks
54.All noble gases are? – Colourless and Odourless
55.The most abundant element in the earth’s crust is ? – Oxygen
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56.The lustre of a metal is due to _______ . – Presence of free electrons
57.Which gas is used in fire extinguisher? – carbon dioxide
58.Which gas is used in cigarette lighters? – Butane
59.Biogas chiefly contains ______ . – Methane
60.Chemical used as fixer in Photography is ______ . – Sodium thiosulphate
61.Aspirin is ______ . – Acetyl Salicylic Acid
62._____ is also known as ‘Stranger Gas.’ – Xenon
63.Natural rubber is a polymer derived from ______. – Isoprene
64.‘Oil of Vitriol’ is ______ . – Sulphuric acid
65.Paper is chemically _______ . – Cellulose
66.Impurity present in ore is ________ . – Gangue
67.Which is known as ‘Metal of Future’ ? –Titanium
68.Efficiency of the catalyst depends on its? – Molecular State
69.Most of the explosions in mines occurs due to mixing of ______ . –Methane with air
70.Vinegar is an aqueous solution of ______ . – Acetic acid
71.Kerosene is a mixture of _____ . – Aliphatic hydrocarbons
72.The important metal used with iron to produce stainless steel is _____ . – Chromium
73.Which gas is responsible for the swelling of bread? – Carbon dioxide
74.The metal constituent of chlorophyll is _____ . – Magnesium
75.Which acid is used for etching glass? –Hydrofluoric acid (HF)
76.Paraffin wax is _________ . – Saturated hydrocarbon
77.Solder is an alloy of _____ . – Tin and Lead
78.Alum is used as – A purifier for water
79.Nuclear fuel in the sun is ______ . – Helium
80.Dead organisms are transformed into petroleum and natural gas ______ . – Absence of air
81.Organic Compounds are only soluble in _____ . –Non-polar solvents.
82.Which acid is used in soft drinks? – Carbonic acid (H2CO3)
83.Which acid is present in Bee Sting? –Methanoic Acid
84.Tooth enamel is made up of ______ . – Calcium Phosphate
85.The name ‘catalyst’ was given by _____ . – Berzilius
86.A polymeric substance used to make parachute is _____ . –Viscose
87.What is used to avoid melting of ice? – Gelatine
88.Carbon occur in the nature in the purest form as? –Diamond
89.Oxidation is defined as —– – Loss of electrons
90.In nuclear reactor, chain reaction is controlled by using _____ . –Cadmium rod
91.The radioactive element most commonly detected in humans is _____ . –Potassium – 40
92.Hydrogen bomb is based on the principle of _____ . – Nuclear fusion
93.The ultrapure metal is obtained by _____ . – Zone refining
94.Most abundant metal in earth’s crust is ______ . – Aluminium
95.Balloons are filled with _____ . –Helium
96.The element common to all acids is _____ . –Hydrogen