Important Chemistry Questions
- Which is the second most abundant metal in the earth’s crust? – Iron
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- Which alloy used in making heating elements for electric heating devices? – Nichrome
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- Which is the element found on the surface of the moon? – Titanium
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- Radioactive disintegration of uranium ultimately results in which formation? – Lead
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- Which variety of glass is heat resistant? – Pyrex glass
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- Which synthetic fiber is known as artificial silk? – Rayon
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- Which fertilizer has more nitrogen content? – Urea
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- Which is the essential element in all organic compounds? – Carbon
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- Which substance coated on plastic tape? – Iron oxide
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- Which is used in the welding industry? – Acetylene
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- Which element present in the largest amount in rocks and minerals? – Silicon
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- Which is used as a material for making protective windows in space probes? – Diamond
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- Non-stick cooking utensils are coated with which metal? – Teflon
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- Which substance is a bad conductor of electricity but a good conductor of heat? – Mica
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- Which is the most unreactive gas? – Hydrogen
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- ‘IC chips’ for computers are usually made of which metal? – Silicon
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- In fireworks, how is the green flame produced? – Because of barium
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- By which an element is best characterized? – By its atomic number
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- Which when dissolved in HO gives hissing sound? – Limestone
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- What are Rubies and Sapphires chemically known as? – Aluminum oxide
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- Which material is suitable for water purification? – Zeolites
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- Which glass is used in bulletproof screens? – Reinforced glass
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- What is used in preparing match sticks? – Red phosphorus
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- Which type of glass can cut off ultraviolet rays? – Crookes glass
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- From which are Contact lenses made? – Lucite
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26. Which polymer is used for making bulletproof material? – Polyethylene
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- Which major component is used in the preparation of different types of glasses? – Silica
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- Which will you put into pure water in order to pass an electric current through it? – Lemon Juice
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28. With which name of the particle ‘Boson’ is associated? – S. N. Bose
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- Cooking gas is a mixture of which gases? – Butane and propane
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- What is the most abundant metal in the earth’s crust? – Aluminum
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- Which are the metal that is present in photo films? – Silver
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- Which element that does not occur in nature but can be produced artificially? – Plutonium
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- In vulcanization, with which the natural rubber is heated? – Sulphur
……………………………………………………………………………………………………………….Which chemical used as a ‘fixer’ in photography? – Sodium thiosulphate
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- Which does not wet the walls of the glass vessel in which it is kept? – Mercury
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- Acetylsalicylic acid is commonly used as which medicine? – A pain killer
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36. Which acid used to remove inkspots? – Oxalic acid
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- All acids contain which element? – Hydrogen
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- In which processes light energy is converted into chemical energy? – Photosynthesis
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- Which metal used to pollute the air of a big city? – Lead
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- Which is a non-metal that remains liquid at room- temperature? – Bromine
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- Which pair does not contain a coinage metal? – Zinc and Gold
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- By which method is the age of most ancient geological formations estimated? – C4 method
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- What is the main constituent of natural gas? – Methane
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- For which thing is Washing soda the common name? – Sodium carbonate
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- By which permeability is a superconductor characterized? – Zero permeability
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- In colorful diamond, Why are different colors present? – Due to impurities
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- Which is an element which never exhibits positive oxidation state in any of its compounds? – Fluorine
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- Which is a major constituent of Biogas? – Methane
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48. Which metal is used for making boats because it does not corrode by seawater? – Titanium
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- Which nontoxic gas helps in the formation of enzymes which ripen fruit? – Acetylene
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- Does uranium eventually decay into a stable isotope of the element? – Lead
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- Which contain a high content of lead? – High octane fuel
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- Which is used in beauty parlors for’ hair setting? – Sulphur
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- The filament of an electric bulb is made of which metal? – Tungsten
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- What is the average salinity of sea water? – 3.5%
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- Which isotope of uranium capable of sustaining chain reactions? – U-235
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- Which is used as a filler in rubber tires? – Carbon black
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- By whom was the quantum theory first enunciated? – By Max Planck
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- Which charcoal is used to decolorize raw sugar? – Wood charcoal
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- Which is the most important ore of aluminum? – Bauxite
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- Which is the metal used in storage batteries? – Lead
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- How are Oxygen and ozone? – Allotropes
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64. Which is the best conductor of electricity? – Silver
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- ‘Gobar gas’ contains mainly which gas? – Methane
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- Which is the gas usually filled in the electric bulb? – Nitrogen
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66. Which are the Actinides elements with atomic numbers? – From 89 to 103
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- Which elements are obtained from seaweeds? – Iodine
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- Which type of glass is used in making lenses and prisms? – Flint glass
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- Rusting of iron is an example of which thing? – Slow oxidation
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- Which is also called Stranger Gas? – Xenon
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- Which chemical is used in foam fire extinguishers? – Aluminum sulphate
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- Which substance is used to retard the setting action of cement? – CaSO.2HO
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- What is a mixture of potassium nitrate, powdered charcoal, and sulphur called? – Gun powder
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- Which non-metals is not a poor conductor of electricity? – Selenium
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- Which polymeric material is used for making a bulletproof jacket? – KEVLAR
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78. Which type of glass is used for making glass reinforced plastic? – Quartz glass
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- Which is called philosopher’s wool? – Zinc oxide
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- Which metal is non-toxic in nature? – Gold
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- What is a powerful eye irritant present in smog? – Sulphur dioxide
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- What is the main constituent of vinegar? – Acetic acid
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- Which of the toxic heavy metals is found in modern tannery industries? – Chromium
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- What are Carbon, diamond, and graphite together called? – Allotropes
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- Galvanised iron sheets have a coating of which metal? – Zinc
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- Which are the high-temperature superconductors? – Ceramic oxides
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- By which can the location and energy of an electron in an atom be specified? – Quantum numbers
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- If a proton of mass m is moving with a velocity of light, how will its mass? – Unchanged
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- A deuterium nucleus consists of which particles? – One proton and one neutron
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- Stainless steel is an alloy of which metals? – Iron, chromium and nickel
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- Which form of phosphorus is used in safety matches? – Red phosphorus
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- Which is the gas used to extinguish the fire? – Carbon dioxide
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- Which is the element common to all acids? – Hydrogen
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- Which is the substance which can act both as an acid and a base? – Amphoteric
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- Which was the gas which had leaked out of Union Carbide factory in Bhopal? – Methyl isocyanate
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- Which metal is found in ‘plaster of Paris’? – Calcium
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- Which is the main ingredient in cement? – Limestone
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- Which is the basis of the modern periodic table? – Atomic number
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- Which are the important raw materials required in the cement industry? – Limestone and clay
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- What is the major ingredient of leather? – Collagen
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