Q.1:- An important green-house gas other than methane being produced from the agricultural fields is ?
- Nitrous Oxide
- Ammonia
- Sulphur Dioxide
- Arsine
Q.2:- The term “Brown Air” is used for ?
- Acid Fumes
- Photochemical Smog
- Sulphurous Smog
- Industrial Smog
Q.3:- The radiation that can penetrate deepest in our body ?
- UV-Radiation
- Alpha-Particles
- Beta-Particles
- Gamma Particles
Q.4:- The ore of Aluminium is ?
- Fluorspar
- Bauxite
- Chalco Pyrites
- Hematite
Q.5:- The most abundant element is ?
- Calcium
- Silicon
- Oxygen
- Nitrogen
Q.6:- Which one of the following contains maximum percentage of Carbon ?
- Cast Iron
- Stainless Steel
- Wrought Iron
- High Speed Steel
Q.7:- The first organic compound synthesised in the laboratory was ?
- Urea
- Uric Acid
- Lactic Acid
- Glucose
Q.8:- Which one of the following is found in Vinegar ?
- Acetic Acid
- Propionic Acid
- Formic Acid
- Butyric Acid
Q.9:- Silicone is a polymer of ?
- Tetraalkyl Silane
- Silicon Tetrachloride
- Dialkyl Dichloro Silane
- Silane
Q.10:- The heaviest naturally occurring element is ?
- Mercury
- Polonium
- Thorium
- Uranium
Q.11:- Piped Natural Gas (PNG) is used for ?
- Mining
- Welding
- Anaesthesia
- Cooking
Q.12:- Ethanol containing 5% water is known as ?
- Dilute Alcohol
- Power Alcohol
- Rectified Spirit
- Absolute Alcohol
Q.13:- Black lung disease occurs in people working in ?
- Electroplating Industry
- Organic Solvents Industry
- Paint Manufacturing Industry
- Coal Mines
Q.14:- The chief source for the production of Nitrogenous Fertilizers is ?
- Ammonia
- Nitric Acid
- Nitrogen
- Nitrogen Dioxide
Q.15:- Heavy metal pollution of water is caused by ?
- Paints
- Wood Burning
- Acid Plants
- Domestic Sewage
Q.16:- Extensively used Nitrogenous fertilizer is ?
- Ammonium Nitrate
- Urea
- Ammonium Sulphate
- Nitro-Lime
Q.17:- The main constituent of natural gas is ?
- Methane
- Ethane
- Butane
- Propane
Q.18:- The depletion of Ozone Layer is due to ?
- Chloro Fluoro Carbon
- Carbon Dioxide
- Sulphur Dioxide
- Ethane
Q.19:- The common refrigerant in domestic refrigerator is ?
- Neon
- Oxygen
- Nitrogen
- Freon
Q.20:- Coal is formed from ?
- Crude Oil
- Deposit of Animal Waste
- Coke
- Compressed and Hardened Biomass
Q.21:- Detergents are ?
- Sodium salts of fatty acids
- Sodium salts of Sulphonic Acids
- Sodium salt of Benzoic Acid
- None of the above
Q.22:- If all bullets could not be removed from gunshot injury of a man, it may cause poisoning by ?
- Mercury
- Lead
- Iron
- Arsenic
Q.23:- The National Chemical Laboratory (India) is located in ?
- Mumbai
- Bangaluru
- Hyderabad
- Pune
Q.24:- One of the constituents of tear gas is ?
- Ethane
- Ethanol
- Ether
- Chloropicrin
Q.25:- The element which is used for vulcanizing rubber ?
- Sulphur
- Bromine
- Silicon
- Phosphorus
