Accessing a compilation of 500 Chemistry Questions Part-2 for exam preparation holds immense significance for students. Firstly, it offers a comprehensive review of the subject, covering a wide range of topics likely to be tested. Secondly, practicing such a large number of questions aids in solidifying understanding and retention of key concepts.
Furthermore, it allows students to gauge their proficiency level and identify areas needing further improvement. Ultimately, this extensive practice contributes significantly to enhancing exam readiness and performance.
500 Chemistry Questions Part-2
- How to determine the quality of a gasoline sample – its octane number
- Glycol is added to aviation gasoline because it – Prevents freezing of petrol.
- Alcohol is used to prevent knocking in car engines.-Ethyl
- Which gas is mainly present in the mixture of gases coming out of septic tank – Methane
- The main component in cow dung gas is – methane
- The main component of natural gas is – methane
- The main component of Bio Gas is – Methane
- Which gas comes out from marshy land – Methane
- Who propounded the law of diffusion of gases – Graham
- A gas that is lighter than air is ammonia
- The molecular weight of a gas is twice its vapor density.
- Different gases at the same conditions of temperature and pressure have the same number of molecules in the same volume.
- In the gaseous equation pV = nRT, R represents one mole of gas.
- What is the cycle line drawn to show the volume pressure behavior of gases at different constant temperatures called – Isothermals
- The energy of an ideal gas depends on the number of moles.
- What is the percentage of pure gold in 18 carat mixed gold – 75%
- What causes Minimata disease – MercuryKnown as Quick Silver – Mercury
- Which is liquid at normal temperature – mercury
- An amalgam always has one component – mercury.
- Which gas is filled in a normal tube light (fluorescence bulb) – Mercury vapor with argon
- The chemical formula of Vermillion is – HgS.
- The chemical name of Vermillion is – Mercuric Sulphide.
- Which metal is used in big cities – Lead
- Which metal is used in accumulator batteries – Lead
- Red Lead is – Pb3O4
- Cadmium pollution is associated with – Itai-Itai
- All gases attain zero volume when the temperature is –2730 C.
- The value of absolute temperature is –2730C
- The chemical substance present in bones and teeth is – Calcium phosphate
- The chemical formula of Plaster of Paris is – 2CaSO H2O
- The chemical formula of Dolomite is – CaCO3.MgCO3.
- The polluting gas emitted from vehicles is mainly – carbon monoxide
- Which gas pollutes the air the most – Carbon monoxide
- Which gas is necessary for photosynthesis – carbon dioxide
- Which gas is used by plants in photosynthesis – Carbon dioxide
- It is not advisable to sleep under a tree at night because it releases carbon dioxide.
- The gas used to extinguish fire is – CO2
- Due to the presence of which lime water becomes milky when kept in air – Carbon dioxide
- What is dry ice – solid carbon dioxide
- Making double roti by adding yeast to wheat flour makes it spongy and soft because the CO2 produced makes the roti spongy.
- Which gas has more impact on greenhouse effect – Carbon dioxide
- The chemical name of plaster of paris is calcium sulphate hemihydrate.
- The laughing gas used by doctors as anesthesia is – Nitrous oxide.
- The cause of acid rain is – NO2 + SO2
- What causes stone cancer – Acid rain
- Which mixture of gases do divers use to breathe – Oxygen and Helium
- What is given to an asthma patient instead of air – He + O2
- Oxygen used for artificial respiration in hospitals is a mixture of which gases – Oxygen and helium
- The main element of human bone is – P
- Bird bone powder is used as fertilizer because it is rich in phosphorus.
- What does the ozone layer above the earth’s surface provide protection from – ultraviolet rays
- The element used to vulcanize rubber is – Sulphur.
- Blackening of silver utensils is due to the presence of which gas in the atmosphere – H2S
- Which gas is responsible for the production of acid rain in the atmosphere – SO2
- When there is excess of which in the air, the leaves of trees turn black and fall – SO2
- What is used as electrolytes in a dry cell – Magnesium chloride and zinc chloride
- Is called the King of Chemicals – Sulfuric Acid
- Which acid is considered as ‘Basic Chemical’ in chemical industry – H2 SO4
- The electrolyte used in a car battery is – Sulfuric acid
- Which acid is stored in batteries – Sulfuric acid
- As a result of reaction of dilute sulfur with zinc, hydrogen is produced.
- Which is obtained purely from the reaction of sugar and sulfuric acid – Carbon
- ‘Chlorination’ is – adding small amount of chlorine to contaminated water.
- The most reactive among halogens is – Fluorine.
- Red phosphorus is used in making matches.
- Bones and teeth contain about 50% calcium phosphate.
- Vinegar is – 5% solution of acetic acid in water.
- If milk is kept uncovered for a long time, it becomes sour. What is this caused by – Lactic acid
- Accumulation of which substance in muscles causes fatigue – Lactic acid
- What causes lemon to turn sour – Citric acid
- Stones formed in human kidneys are usually made of calcium oxalate.
- What is used to create smoke curtain in war – PH3
- What is fire fighting clothing made from – Asbestos
- Tincture of iodine is – alcoholic solution of iodine.
- Denatured alcohol – Not good for drinking as it contains toxic substances.
- What is the end product of Alcoholic Fermentation – Ethyl Alcohol
- Whose chemical formula is C2H5OH – Ethyl alcohol
- By what name is Methane known? – Alcohol
- Alcohol is formed as a result of which process – Fermentation
- Antifreeze mixture is used in radiators of automobiles in cold climate countries. What is contained in this mixture – Water and ethylene glycol
- Aldol condensation cannot occur between – an aldehyde and an ester
In what form is oxalic acid present in plant cells – Calcium oxalate - How is iodoform used – Antiseptic
- Pearl is mainly made up of – calcium carbonate
- How Ruby and Sapphire are known chemically – Aluminum Oxide
- Which are used as electrolytes in dry cell (battery) – Ammonium chloride and zinc chloride
Enriched uranium is natural uranium in which the content of the radioactive U235 isotope has been artificially increased. - The commercial name of sodium bicarbonate is – baking soda.
- Mortar is a mixture of water, sand and gypsum.
- In what form is nitrogen present in urea fertilizer – Amide
- Which gas is produced when lightning flashes in the sky – NO
- Which one gas is produced during the formation of photochemical smog – Nitrogen oxide
- Which reaction occurs due to lightning – Oxides of nitrogen are formed by the reaction of nitrogen and oxygen.
- A common atmospheric gaseous pollutant has been found to be very useful when it is produced in the body’s cells. It treats heart disease and the wonder drug Viagra has been developed from it. For its discovery, the scientist also received the 1998 Nobel Prize in Medicine. Which gas is this – Nitric Oxide
- What is used as a moderator in nuclear reactor – Graphite
- What is determined by radio carbon dating – age of fossils
- Animal charcoal is used to decolorize raw sugar.
- Brown coal is called – Lignite
- Soft coal is known as – Bituminous
- Common type of coal is – Bituminous
- High grade coal is – Anthracite
- Sulfur dioxide gas is obtained by burning pyrite ore.
- The halogen which is used as an analgesic – Iodine
- Which chemist propounded the theory of life force – Berzelium
- The most abundant organic compound found in nature is – Cellulose.
- By which method is Camphor purified – Sublimation
- The process of formation of vapor from solid camphor is called – sublimation
- The reason for permanent hardness of water is – bicarbonates of calcium and magnesium.
- What is the function of heavy water in a nuclear reactor – to reduce the speed of neutrons.
- Heavy water means deuterated water.
- Heavy water is that in which hydrogen is replaced by its isotope.
- Heavy water is a type of retarder.
- Carbon is a non-metal
- The percentage of nitrogen in urea is – 46%