Chemistry – Miscellaneous Topics One Liner Questions & Answers


Questions Answers
1 The Nobel Prize in Chemistry, 2019 was awarded for the development of Lithium-ion batteries
2 What types of glass can cut off ultraviolet rays? Crookes glass
3 The ozone layer of the upper atmosphere is being destroyed by – Chlorofluorocarbons
4 Which gas is used in fire extinguishers? Carbon dioxide
5 In the ordinary fire extinguisher, Carbon dioxide is generated by the reaction of – Sodium bicarbonate and dilute Sulphuric acid
6 Which compounds are used to make fireproof clothing? Aluminium Sulphate
7 An active chemical to remove mosquitoes is – Allethrin
8 Prallethrin is a common – Mosquito repellent
9 What is used as a mosquito repellent? Pyrethrum
10 Pyrethrin used in mosquito coil is obtained from – A seed plant
11 What is used in preparing a natural mosquito repellent? Lemongrass
12 Which chemical substance is used for making rat poison? Potassium Cyanide
13 Rodenticide is the chemical which is used to control – Mouse
14 In India, the use of carbofuran, methyl parathion, phorate and triazophos is viewed with apprehension. These chemicals are used as – Pesticides in agriculture
15 The Weedicide commonly used for paddy is – 2, 4-D
16 2, 4-D is – A herbicide
17 Isotope 6C14 is associated with – Determining the age of fossil
18 Carbon dating is used to determine the age of – Fossils
19 ‘Radioactive dating is a technique which can be used to measure – The age of rocks
20 Which methods is used for measuring the age of the earth? Uranium process
21 One carbon credit is equivalent to – 1000 kg of CO2
22 Which types of glass can cut off ultraviolet rays? Crookes glass
23 With which of the following is BRIT (Government of India) engaged? Isotope Technology
24 A pungent smell often present near the urinals is due to – Ammonia
25 In the context of which of the following do some scientists suggest the use of cirrus cloud thinning technique and the injection of sulphate aerosol into the stratosphere? Reducing the global warming
26 Which chemicals has been in use till now for making artificial clouds? Silver Iodide
27 Amount of rain depends on – Humidity in the atmosphere
28 What is called the ‘metal of the future’? Titanium
29 Chemically ‘Vermillion’ is – Mercuric Sulphide
30 ‘Red ink’ is prepared from – Eosin
31 Which colours is supplied by Sodium Chromate? Red
32 Which main elements is used in making a matchbox? Phosphorous
33 When kept in air and darkness elements glows spontaneously? White phosphorus
34 Carbon Nanotubes (CNTs) were prepared by – Iijima
35 In India, the water desalination plant is located in – Lakshadweep
36 Where was the first desalination plant in India to produce one lakh litres of fresh water per day based on the low-temperature thermal desalination principle commissioned? Kavaratti
37 Which chemical acts as a reclamation agent for alkaline soil? Calcium Sulphate
38 Liquid Oxygen or liquid Hydrogen is used technology in obtaining the industrial level called – Cryogenics
39 Mustard gas is used – In chemical warfare
40 Poisonous mustard gas is a – Liquid
41 Smoke screen is used in warfare for the purpose of concealment and camouflage. Smoke screens generally consist of fine particles of – Titanium oxide dispersed in air
42 What is Agent Orange?
A weed-killing chemical used by the US military in the Vietnam War
43 In dry cells, which are used as electrolytes? Ammonium Chloride and Zinc Chloride
44 The energy, found in dry cells is – Chemical
45 In a car battery, the electrolyte substance used is – Sulphuric acid
46 Which pairs of materials serve as electrodes in chargeable batteries commonly used in devices such as torchlights, electric shavers etc.? Nickel and Cadmium
47 In a microwave oven, the microwave tube used is – Magnetron tube
48 For which branch of science U.N. designate the year 2011? The International Year of Chemistry
49 Which countries has made it mandatory to blend ethanol with gasoline? Brazil
50 Which is an inorganic gaseous pollutant of air? Hydrogen Cyanide & Hydrogen Sulphide
51 The chief source of Hydrogen Sulphide pollutants is – Decaying vegetation and animal matter
52 The relative contributions of carbon dioxide (CO2), nitrous oxide (N2O), chlorofluorocarbons (CFCs) and methane (CH4) towards global warming are – CO2> CH4> N2O > CFCs
53 Harnessing of nuclear energy often causes – Thermal Pollution
54 The incomplete burning of petrol and diesel produces – carbon monoxide
55 What is particulate matter? Air pollutant
56 The size of the Respirable Suspended Particulate Matter (R.S.P.M.) in air is – More than 5 µ m (micron)
57 Under the Government of India’s National Air Quality Monitoring Programme (NAMP) covering 312 cities/ towns in 29 States and 6 Union Territories of the country, which combinations has been identified for regular monitoring at all the locations?
Sulphur Dioxide (SO2), Nitrogen Dioxide (NO2), Suspended Particulate Matter (PM10) and Fine Particulate Matter (PM2.5)
58 Smog is essentially caused by the atmospheric presence of – Oxide of nitrogen and sulphur
59 Eutrophication of water bodies results from – High amounts of nitrogenous nutrients and orthophosphates
60 Biological Oxygen Demand (BOD) is a standard criterion for – Pollution assay in aquatic ecosystems
61 Physico-chemical characteristics of water in water sources undergo changes due to – Efuents
62 In the context of which are the terms ‘pyrolysis and plasma gasification’ mentioned? Waste-to-energy technologies