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 |