01.The chemical used as a fixer in photography is - sodium thiosulphate
02.Which of the following substance is a bad conductor of electricity but a good conductor of heat - Mica
03.Polythene is industrially prepared by the polymerisation of-ethylene
04.The shell of the egg is made of -Calcium Carbonate.
05.Talc is basic -magnesium silicate mineral
06.The highest and simplest element is hydrogen while the lightest metal is- Lithium
07.Temporary hardness of water is due to the bicarbonates of calcium and magnesium. It can be removed by - boiling or adding lime
08.Sodium is stored in Kerosene to prevent- oxidation.
09.Permanent hardness is due to the presence of sulphates and chlorides of calcium and magnesium. It can be removed by -Adding washing soda or by distillation
10.NPK mixtures are fertilizers with the mixtures of -nitrogen, phosphorous and potassium.
11.The gas responsible for the Bhopal Gas Tragedy is --Methyl Isocyanate (MIC)
12.CO2 is used as- fire extinguishers.
13.Thorium is extracted from - monozite sand.
14.Red phosphorus is used in -Making matches
15.In a dry cell, zinc and carbon act as- electrodes.
16.Chlorine is used as a-bleaching agent.
17.Lead pencils contain - graphite.
18.White phosphorus is a - strong poison.
19.Carborundum is used as an abrasive for- cutting and grinding glasses.
20.Silver iodide is used to make - artificial rain.
21.Zinc oxide is called the- 'flower of Zinc’
22.Water is called - Universal Solvent
23.The gas used in refrigerators is- ammonia.
24.The lightest substance known is Hydrogen and the heaviest is -Osmium.
25.Con. Nitric acid is used to- purify gold.
26.A mixture of salt and ice gives a temperature below 0°c which is called Antifreeze. It is used to - breakdown ice mixtures in the radiators of cars in cold countries.
27.Neoprene is a synthetic rubber used as insulators in- Electric cables.
28.Butane is used in- cigarette lights.
29.A mixture of oxygen and acetylene gases are used for- gas welding.
30.Methane is the main component of- biogas.
31.The smell of cooking gas is due to the Ethyl Mercaptan which helps to- detect gas leakage.
32.Alnico is an alloy of aluminium used for- making magnets.
33.Duralmin is an alloy of aluminium (94%), copper (4%) and Magnesium (1%) used for - constructing air crafts.
34.Invar is a nickel -iron alloy used for- making clocks.
35.The gas was formed in atmosphere during lightining – NO & NO2
36.Aspirin or Acetyl salicylic acid is used as a -
37.The rarest element in earth - Astatine
38.Tri Nitro Toluene (TNT) is used as an- explosive.
39.The most commonly used Synthetic rubber is- styrene Buta-diene rubber (SBR).
40.The electrodes of dry cell is made up of- Graphite.
41.Acid rain is caused by the pollution of environment due to- nitrogen oxide and sulphur dioxide.
42.The most chemically active element is- Fluorine.
43.Chloro fluro carbon (CFCS) used in refrigerators causes- ozone hole formation.
44.Sodium/Potassium salt of stearic acid, palmitic acid and oleic acid is- soap.
45.Aquaregia is a mixture of concentrated nitric acid and hydrochloric acid which can dissolve- gold and platinum.
46.Coins are made of coinage alloy which consists of- copper and nickel.
47.Coloured glasses for goggles contain- ferrous oxide.
48.Coating of iron with zinc to prevent from rusting, is called-galvanisation.
49.Lead is used in petrol as an - antiknocking agent.
50.Natural gas predominantly contain - methane.
51.Liquified Petroleum Gas mainly consists of- liquified butane and isobutane
52. Ethylene is used for the artificial ripening of- green fruit.
53.Gelatine is used in the manufacture of ice cream to- prevent crystal growth.
54.Vulcanisation is the process of adding sulphur to rubber to make it- strong and bounceable
55.Non stick kitchenware is coated with- teflon (Poly tetra Fluro Ethylene) and pottassium hydrogen tartarate.
56.Stainless Steel is an alloy of - iron (73%), Carbon(1%), Chromium (18%) and Nickel (8%)
57.Solder is an Alloy of - lead (50%) and tin (50%)
58.Brass is an alloy of- copper (60-80%) and Zinc (40-20%)
59.Mercury and gallium are metals which are liquids at- room temperature.
60.The hardest metal is -Tungsten.
61.Wrought iron is the purest type of iron that contains- least amount of carbon
62.Silver, gold and platinum are known as - noble metals.
63.Metals which has the highest density is- Osmium
64.Gun metal is made from- tin and copper.
65.Cobalt is used in making rust - resistant alloys.
66.Steel is a form of iron. To make steel from iron, The carbon
67.Platinum metal occurs in its pure form in- Earth’s crust
68.The first known super conductor is - mercury.
69.Silver is the best conductor of - heat and electricity.
70.Iodine is a- solid non-metal
71.Iron is the-first metal used by man
72.Metallic cofactor present in chlorophyll is- magnesium.
73.Metallic cofactor present in haemoglobin is- iron.
74.Metal abundant in sea water is- Vanadium
75.The metal most abundant in human body is- calcium.
76.The element which is seen in the rocks of moon -Titanium
77.Which element has the highest electro positivity- Francium
78.Cobalt ions give ...... colour to glass - Blue
79.Which is not a constituent of Sugar- Nitrogen
80.Which metal plays a key role in the synthesis of proteins - Magnisium
81.Marsh Test determines the presence of - Arsenic
82.Which of the following is a common constituent of Transistor -Germanium
83.Frederic Wohler made urea from........ - Ammonium cyanate
84.The catalyst used for the manufacture of Ammonia - Iron
85.Which one of the following is the result of Green House Effect Global warming
86.The whitest substance - Titanium dioxide
87.Which element has the second highest capacity for oxidation - Oxygen
88.Dow process is used for the extraction of- Magnisium
89.The second most ductile element - Tungsten
90.Which metal is contained in Insulin – Zinc
91.Number of naturally occurring elements- 92
92.Number of periods in the periodic table - 7
93.Number of groups in the periodic table -18
94.Number of blocks in the periodic table - 4
95.Alakaline earth metals belong to ......group - Second
96.Alkali metals belong to ...... group. - First
97.13th group is called ........ group or Boron group - Aluminium
98.14th group is called ....... group - Carbon
99.15th group is called ....... group - Nitrogen
100.Halogens belong to ....... group - 17th
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