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740+ Chemistry Questions
Important One Liners For All Exams
Q.601. Micro organism which monitor the air pollution
➥Lichen
Q.602. Substance used Highly as a food preservative –
➥Sodium salts of benzoic acids
Q.603. Super Sonic Jet causes pollution by thinning of–➥O3 Layer
Q.604. Bhopal Gas Tragedy was caused by –
➥Methyl Isocyanite
Q.605. Freon is used as a
➥Coolant
Q.606. Coolant ‘Freon’ is–
➥Dichloro Methane
Q.607. Which gas is used for the artificial riping of Green Fruits?
➥Ethylene
Q.608. Aspirin is common name of–
➥Acetylsalicylic acid
Q.609. Chemical name of Gamma xene is
➥Benzene Hexa Chloride
Q.610. Main Gaseous pollutant of thermal power plants is–
➥SO2
Q.611. Acid rain destroy vegetation because it contains –
➥Sulphuric acid
Q.612. A hard fluid present in smog which causes irritation in eyes is–
➥Peraxyacetyl Nitrate
Q.613. Acid rain is caused due to pollution of atmosphere by–
➥Oxides of Nitrogen and Sulphur
Q.614. The inert gas used as beacon Light is –
➥Neon
Q.615. Hydrogen was discovered by –
➥Cavendish
Q.616. Paper is made by–
➥Cellulose of plants
Q.617. Litmus is obtained from –
➥Lichen
Q.618. Which gas is used as a disinfectant in drinking water?
➥Chlorine
Q.619. Black Lung disease occours in people working in –
➥Coal mines
Q.620. Burning of candle is a
➥Exothermic reaction
Q.621. In the Industrial production of vegetable ghee, the process involved is –
➥Reduction
Q.622. Gas used in the production of vegetable ghee is–
➥Hydrogen
Q.623. Cooking oil is converted into vegetable ghee by the process of–
➥Hydrogenation
Q.624. In a reaction of type A + B → C + D one could ensure it, to be a First order reaction by–
➥Increasing the concentration of a Product
Q.625. Bagasse is used in the manufacturing of–
➥Paper
Q.626. Size of suspended particles lies between–
➥10–5 – 10–7 cm
Q.627. An Emulsion is a colloid of a –
➥Liquid in a Liquid
Q.628. Milk is a
➥Emulsion
Q.629. A colloidal system in which a Liquid is dispersed in a Liquid is called –
➥Emulsion
Q.630. A gas thermometer is more sensitive than a Liquid thermometer because a gas
➥Expands more than a Liquid
Q.631. Nitrogen has Higher ionization energy than oxygen because in Nitrogen there is–
➥Half Filled Stable configuration in 2p orb
Q.632. In deep see diving, divers use a mixture of gases consisting of oxygen and–
➥Nitrogen (N)
Q.633. The Gas dissolved in water that makes it basic is?
➥Ammonia
Q.634. Which metal is extracted from Sea water?
➥Magnesium
Q.635. The Physical method Commonly used to purify Sea water is–
➥Distillation
Q.636. Sea water can be purified by the Process of–
➥Distillation
Q.637. Soda water contains
➥CO2
Q.638. A Liquid is said to be boiled when its–
➥Vapor pressure is equal to the surrounding pressure
Q.639. Hygroscopic objects are those which instantly absorb–
➥Water vapors
Q.640. Quantity (Amount) of water vapors present in atmosphere is measured in –
➥in the form of Humidity
Q.641. Spirit in Contact with body gives cool sensation because it is
➥Highly volatile
Q.642. Cloud is a colloidal of –
➥Water drop in a dispersion medium of air
Q.643. Light Scattering take place in –
➥Colloidal solution
Q.644. What is the fourth State of Matter?
➥Plasma
Q.645. Muddy water is treated with alum in Purification process–
➥Coagulation
Q.646. Alum is used for the water treatment in the process named–
➥Coagulation
Q.647. Suspended colloidal particles in water can be removed by the process of –
➥Coagulation
Q.648. Alum stops bleeding in a minor cut because of –➥Coagulation
Q.649. What is the meaning of Reader in waste water treatment process?
➥Container
Q.650. Iodine can be separated from a mixture of Iodine and potassium chloride by
➥Sublimation
Q.651. Water does not evaporate, if [Stenographer
➥Humidity
Q.652. The amount of chlorine available in water after disinfection called as
➥Residual chlorine
Q.653. What will be the form of Nitrogen in sewage water is completely oxidized?
➥Nitrate
Q.654. When water itself combines chemically with some element or mineral it is called–
➥Hydration
Q.655. Heavy water means–
➥Water containing Maximum density
Q.656. What is the chemical composition of Heavy Water?
➥D2O
Q.657. Heating of ore in the absence of air below its melting point is called
➥Calcinations
Q.658. Water can be separated from the mixture of water-Alcohol by the process–
➥Distillation
Q.659. Iron and Manganese are removed by the process of–
➥Filtration
Q.660. What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius?
➥No change will happen
Q.661. The Process of ozonation in water treatment is known as
➥Disinfection
Q.662. Charcoal is used in water treatment as a/an–
➥Adsorbent
Q.663. Detergents used for cleaning cloths and utensils contains
➥Sulphonates
Q.664. Detergent cleans the surface on the principle of –
➥Surface tension
Q.665. Aqueous Hydrolysis of sucrose formed –
➥Glucose and Fructose
Q.666. Glucose is a type of –
➥Hexose Sugar
Q.667. Dry ice is a solid type of –
➥Carbon dioxide
Q.668. Water gas is a Mixture of–
➥Carbon monoxide and Hydrogen
Q.669. Enzyme which coagulate the milk into curd–
➥Renin
Q.670. Process of Removal of calcium and Magnesium is known as –
➥Water softening
Q.671. Phenolics as Pollutant can be removed from waste water by use of–
➥Ion exchange method
Q.672. Highly polluting industries comes under the category of–
➥Red
Q.673. When Hydrogen combusts in air, then formed–
➥Water (H20)
Q.674. Gas used as a fire extinguisher is
➥Carbon dioxide (CO2)
Q.675. Chemically Lime water is –
➥Calcium Hydroxide
Q.676. Which gas is used for converting vegetable oils into saturated fats –
➥H2 (Hydrogen)
Q.677. Heat transfer Horizontally with in atmosphere is called–
➥Advection
Q.678. Chemical name of bleaching powder is
➥Calcium Hypochlorite
Q.679. Lime water becomes milky when exposed to air due to the presence of –
➥Carbon dioxide
Q.680. Venturimeter is used to measure the–
➥Rate of flow of Liquid
Q.681. The two specific Heats of gases are related by–
➥CP–CV = R/J
Q.682. What is the Main Source of Manufacturing of Nitrogenous Fertilizer?
➥Ammonia
Q.683. What is the average value of salt present in sea water?
➥0.035
Q.684. Percentage of Lead in Lead Pencils is –
➥0
Q.685. The material used in the manufacture of Lead pencil is–
➥Graphite
Q.686. What happens during the charging of Lead operated battery?
➥Consumption of sulphuric acid
Q.687. Plaster of Paris is made by the Partial dehydration of – ➥Gypsum Salt
Q.688. Non-metal founds in Liquid State –
➥Bromein
Q.689. Isomer of ethyl alcohol is –
➥Die Methyl ether
Q.690. Froth Flotation process is used for the metallurgy of –
➥Sulphide ore
Q.691. Which silver salt is used for making film of photography?
➥Silver Bromide (Ag Br)
Q.692. The chemical name of Hypo commonly used in Photography is–
➥sodium Thiosulphate
Q.693. Conversion of Heat into electric energy is achieved by using –
➥Thermocouple
Q.694. Hydrochloric acid is also known as
➥Muriatic acid
Q.695. Disadvantage of using DDT as pesticide is –
➥Not easily degradable in nature
Q.696. pH-scale ranges from –
➥0–14
Q.697. The maximum density of water is at–
➥4°C
Q.698. In a rechargeable cell what kind of energy is stored within the cell?
➥Chemical energy
Q.699. The acid used in the Lead storage cell is –
➥Sulphuric acid
Q.700. Which acid is stored in batteries?
➥Sulphuric acid
Q.701. The mercury and sodium street Lamps Light up become of–
➥Atomic emission
Q.702. What is asbestos?
➥Magnesium silicate
Q.703. Chemically ‘Philosopher wood’ is a–
➥Zinc oxide (zno)
Q.704. Chemical Name of common salt is–
➥Sodium chloride
Q.705. Sodium chloride or Table salt occours in nature as the mineral
➥Halite
Q.706. Sodium carbonate commonly known as–
➥Washing soda
Q.707. Chemical formula of washing soda is–
➥Na2Co3 10H2O
Q.708. Commercial name of sodium bicarbonate is –
➥Baking Soda
Q.709. Chemical name of baking soda is–
➥Sodium Bicarbonate
Q.710. Chile saltpeter is the common name of–
➥Sodium Nitrate (NaNo3)
Q.711. The process of conversion of sugar in to Alcohol is known as–
➥Fermentation
Q.712. Vinegar is the chemical name of –
➥Acetic acid
Q.713. Vinegar formed by the fermentation of cane sugar contains–
➥Acetic acid
Q.714. Electrolysis of copper sulphate solution with copper electrodes gives–
➥Copper at cathode and oxygen at anode
Q.715. Tip of match stick contains –
➥Red phosphorous
Q.716. Green colour seen in firework display is due to the chloride salt of
➥Barium
Q.717. The acid which fails to Liberate carbon dioxide from Sodium carbonate is –
➥Carbonic acid
Q.718. Mortar is a mixture of water, sand –
➥Slaked Lime
Q.719. Most commonly bleaching agent is –
➥Chlorine
Q.720. Helium gas is filled in the balloon instead of Hydrogen because its–
➥NonCombustible
Q.721. Why Helium gas used in balloons?
➥Its Lighter than air
Q.722. Which gas is filled in balloons?
➥Helium
Q.723. The main cause of air pollution in big cities is
➥Suspended particle
Q.724. The word ‘Brown air’ is used for –
➥Photochemical Smoke
Q.725. Which affected the ‘Taj Mahal’?
➥Acid rain
Q.726. Hydrogen sulphide is a
➥Colourless gas with rotten egg smell
Q.727. What is Peroxyl?
➥Macro Pollutant
Q.728. Burning Pyrites ore gives out
➥Sulphur dioxide gas
Q.729. Chloroform can be used as –
➥Anaesthtic
Q.730. Sour taste of coca cola is due to –
➥Phosphoric acid
Q.731. Element with Highest Ionization energy is–
➥helium
Q.732. White Phosphorous is place under the
➥Cold water
Q.733. Commonly sodium is kept under the–
➥Kerosene oil
Q.734. What happen when a drop of Glycerol is added to KMno4 spread on paper?
➥The paper ignites
Q.735. By Product obtained by soap industry is –
➥Glycero
Q.736. The process involved in the making of soap is–
➥Sponification
Q.737. The antiseptic compound present in Dettol is –
➥Enloroxylenol
Q.738. Main constituent of Liquid Bleach is
➥Sodium Hypochlorite
Q.739. Caustic Soda is –
➥Deliquescent
Q.740. Who was the first to explain hydrogen spectrum?
➥Neils Bohr
Q.741. Dry powder fire extinguisher contains –
➥Sand and sodium bicarbonate
Q.742. Carbon dioxide is a –
➥dehydrated agent
Q.743. The most abundant Nobel gas in the atmosphere is
➥Argon
Q.744. The most abundant element on the earth is
➥Oxygen
