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740+ Chemistry Questions
Important One Liners For All Exams
Q.401. What are species containing same number of electrons called?
➥Isoelectronic
Q.402. Rusting of iron is an example of which thing?
➥Slow
oxidation
Q.403. What is the natural source of hydrocarbon?
➥Biomass
Q.404. Which is used as a fuel in Nuclear power stations in India?
➥Thorium
Q.405. Which gas is absorbed during photosynthesis?
➥CO₂
Q.406. What is a mixture of potassium nitrate, powdered charcoal and sulphur called?
➥Gun powder
Q.407. Which is a major constituent of Biogas?
➥Methane
Q.408. Which ore contains both calcium and magnesium? ➥Dolomite
Q.409. Who proposed the Atomic principle of matter?
➥Dalton
Q.410. Which two basic forces are able to provide on attractive force between the two neutrons?
➥Gravitational and Nuclear
Q.411. When a bond is formed between two atoms, the energy so system will be–
➥Decrease
Q.412. Element having atomic number 29 is related to –
➥D-Block
Q.413. Which of the following particle being charged negatively?
➥Electron
Q.414. Cathode rays are–
➥Stream of electrons
Q.415. Which of the following element is most electronegative?
➥Fluorine
Q.416. Which of the following determines the chemical properties of an element?
➥Number of electrons
Q.417. The product equivalent weight and valiancy of an element is equal to–
➥Atomic weight
Q.418. Orientation of atomic orbital is controlled by –
➥Magnetic Quantum number
Q.419. Who is awarded by noble prize for the discovery is neutron?
➥Chadwick
Q.420. An Element Atomic number 17 and mass number 36, then number of neutrons present in it–
➥19
Q.421. Which of the following has maximum Mass?
➥Neutron
Q.422. Atoms having equal number of protons but different number of Neutrons are called –
➥Isotopes
Q.423. Atoms having same no of neutron but different no of electrons or protons are called –
➥Isotones
Q.424. Nucleotide have same atomic number are called: ➥Isotopes
Q.425. What is the value of Avogadro number?
➥6.023 × 1023
Q.426. Which of the following is not a nucleon?
➥Positron
Q.427. Chemical behavious of an element depends upon its–
➥Number of electrons revolving around nucleus
Q.428. Atomic nuclei are composed of–
➥Protons and neutrons
Q.429. The fundamental particles that composed on atom are–
➥Proton, electron, Neutron
Q.430. What are the fundamental elements of an atom?
➥Electron, Proton, Neutron
Q.431. Electronic configuration of Element Atomic number 20 is –
➥2, 8, 8, 2
Q.432. Who discovered the element Atomic number 106?
➥Seaborg
Q.433. Mark the compound which posses ionic, covalent and co–ordinate bond:
➥NH₄Cl
Q.434. Property of Ammonia is –
➥In its aqueous solution Red Litmus turns to Blue Litmus
Q.435. Paper of old books turns to brownish color due to –
➥Oxidation of cellulose
Q.436. Which of the following is strongest oxidizing agent?
➥Fluorine
Q.437. Positive oxidation state of oxygen is possible only in–
➥OF2
Q.438. What is the oxidation number of Nickel in K4[Ni(CN)4]?
➥Zero
Q.439. If Mg Cl2 contains one Millions of Mg2+ Ions, then how many Chloride Ions are present in it?
➥Two million
Q.440. When Helium atom Loses electron, then it becomes–
➥Positive Helium ion
Q.441. The mass number of a nucleus is –
➥sometimes more and sometimes equal to its atomic number
Q.442. The weight of 6.023 × 1022 atoms of carbon is –
➥1-2gram
Q.443. Which of the following particle has the dual nature of particle wave?
➥Electron
Q.444. Mass number is the sum of –
➥Protons and Neutrons
Q.445. An alloy used in making heating elements for electric heating devices is –
➥Nichrome
Q.446. The use of Heat treatment of ore that includes smelting and roasting is termed as–
➥Pyrometallurgy
Q.447. Which of the following does not contains silver?
➥German Silver
Q.448. Aluminum is extracted from –
➥Bauxite
Q.449. The ore of Aluminum is –
➥Bauxite
Q.450. Brass contains –
➥Copper and Zinc
Q.451. Brass is made of
➥Copper and Zinc
Q.452. Maximum permissible concentration of copper in drinking water in mg/L is –
➥2
Q.453. Brass gets discoloured in air due to the presence of which gas in air?
➥Hydrogen sulphide (H2S)
Q.454. Which type of Glass is used for making glass reinforced plastic?
➥Fiber glass
Q.455. Purification of copper is done by –
➥Electrolytic decomposition
Q.456. Non-Metal found in Liquid state is –
➥Bromine
Q.457. The phenomenon of ejection of electrons from the metal surface when a light of suitable frequency falls on it is called–
➥Photoelectric effect
Q.458. Acute Lead poisoning is also known as –
➥Plumbism
Q.459. Which of the following metal has least melting point?
➥Mercury
Q.460. Which of the following metal forms amalgam with other metals?
➥Mercury
Q.461. Amalgam is an alloy in which the base metal is–
➥Mercury
Q.462. What is Baeyer’s reagent?
➥Alkaline Potassium Permanganate
Q.463. Hygroscopic substances are those substance which ready absorb–
➥Water Vapors
Q.464. Rusting of Iron is –
➥Due to oxidation
Q.465. The rusting of iron metal in air needs both–
➥Oxygen and Moisture
Q.466. Which of the following is required for the rusting of iron?
➥oxygen and water
Q.467. Iron rusts quickly in –
➥Sea water
Q.468. The rusting of iron–
➥Increases its weight
Q.469. Which of the following is not a chemical change?
➥Conversion of water into steam
Q.470. If the bullets could not be removed from gunshot injury of a man, it may cause poisoning by–
➥Lead
Q.471. The ratio of pure gold in 18 carat gold is –
➥0.75
Q.472. The King of metal is -
➥Gold
Q.473. German Silver contains following Metals –
➥Copper, Zinc, Nickel
Q.474. Which of the following is not contained by the German Silver?
➥Silver
Q.475. Which metal is used to Galvanize iron?
➥Zinc
Q.476. To protect the iron from getting rusted, the coat of zinc is applied on it. This process is known as–
➥Galvanization
Q.477. Ultra purification of a Metal is done by–
➥Zone Melting
Q.478. Glass is a –
➥Supper cooled Liquid
Q.479. Which of the following contains high content of Lead?
➥High octane fuel
Q.480. Which of the following is not favourable to prevent iron from rusting?
➥Annealing
Q.481. Which of the following is responsible for extra strength of Pyrex glass?
➥Borax
Q.482. Which one of the following metals does not react with water to produce hydrogen?
➥Cadmium
Q.483. Which one of the following reacts with Fehling’s solution?
➥HCHO
Q.484. Sodium vapor Lamps glow with yellow Light. This is due to–
➥Sublimation of sodium to emit yellow colour
Q.485. The Element which does not occours in nature but can be formed, is
➥Radium
Q.486. Which of the following elements behave chemically both as metal and a nonmetal?
➥Boron
Q.487. Which of the following metal has maximum electrical conductivity?
➥Silver
Q.488. Which of the following is most bad conductor?
➥Lead
Q.489. Bronze is an alloy of–
➥Copper and Tin
Q.490. Shock absorbers are usually mode of steel as it?
➥Has Higher elasticity
Q.491. Identify the metal which is non-toxic in nature–
➥Gold
Q.492. Which of the following metal is found in Free State in nature
➥Gold
Q.493. Most important ore of Lead is–
➥Galena
Q.494. Which of the purest commercial form of Iron?
➥Wrought Iron
Q.495. Which of the following is purest form of Iron?
➥Wrought Iron
Q.496. Which one of the following is known as the brown coal?
➥Lignite
Q.497. Which one of the following is not a coal variety?
➥Dolomite
Q.498. The Iron ORE which contains 72% of Iron is –
➥Magnetite
Q.499. Which one of the following is an iron ore?
➥Magnetite
Q.500. Which one of the following Mineral does not contains oxygen?
➥Cryolite
Q.501. Which metal is protected by the layer of its own oxide?
➥Aluminum
Q.502. The ore only two metals that are Non–Silver in colour, they are–
➥Copper and gold
Q.503. Siderite is an ore of–
➥Iron
Q.504. Which of the following process is used in the extraction of iron from the Iron ore?
➥Reduction
Q.505. Which one of the following metals cannot be used as an electromagnet?
➥Copper
Q.506. Quartz is a type of
➥Silicon dioxide
Q.507. Raw materials used in the manufacturing of glass are–
➥Soda, Lime Stone Silica Sand ash
Q.508. Ruby and sapphire are the oxides of –
➥Aluminum
Q.509. Which of the following is used in welding broken pieces of iron rails and parts of machine –
➥Aluminum Powder
Q.510. Which one of the following does not present in the Stainless Steel?
➥Tungsten
Q.511. The addition of Gypsum to Portland cement helps in–
➥Preventing rapid settling of cement
Q.512. Who discovered cement?
➥Joseph Aspdin
Q.513. Air pollution by “Fly Ash” is caused by–
➥Cement industry
Q.514. Cement is formed by strongly heating a Mixture of –
➥Lime Stone and clay
Q.515. Cement is a mixture of –
➥Calcium Silicate and calcium aluminates
Q.516. Which one of the following Metals is used to Heat up the electric iron?
➥Nichrome
Q.517. Which of the following is strongest coagulant?
➥Aluminum Chloride (Alcl3)
Q.518. The Base used as an antacid is –
➥Magnesium Hydroxide Mg(OH)2
Q.519. Which of the following metal is found in Free State?
➥Copper
Q.520. Which one of the following is used in Pencils?
➥Graphite
Q.521. In Graphite layers are held together by–
➥Vander wall forces
Q.522. Which one among the following is Lubricant?
➥Graphite
Q.523. One carat of Diamond is equal to–
➥200 mg
Q.524. Which of the following are properties is generally found in non-metals?
➥Brittleness
Q.525. What is wood spirit?
➥Methyl Alcohol
Q.526. Fire-Fighting cloths are made from–
➥Asbestos
Q.527. The Gas Causes acid rain in an industrial area is–
➥Sulphur dioxide
Q.528. Acid rain in the environment is caused by the Higher concentration of –
➥SO2 and NO2
Q.529. Which one of the following is used to dissolve noble metals?
➥Aqua regia
Q.530. Aqua regia is a Mixture of the following in the ratio 1:3 by volume–
➥Conc HNO3 and conc CHL
Q.531. Sulphuric acid is –
➥Dibasic
Q.532. Fullerene is a newly discovered crystalline carbon allotrope, contains–
➥60 C atoms
Q.533. Catalytic Converters are Generally Made from
➥Transition Metals
Q.534. The First Time atomic bomb was released at–
➥Hiroshima
Q.535. Hydrogen Bomb is based upon the Principle of–
➥Uncontrolled Nuclear Fusion
Q.536. Which type of reaction produces the most harmful radiation?
➥Fission
Q.537. How many countries explode the atom bomb before India?
➥5
Q.538. Chocolates nay Harmful to Health because they contains High quantity of –
➥Lead
Q.539. Gun Powder was discovered by–
➥Roger beckon
Q.540. Gun Powder is a Mixture of–
➥Nitrate, Sulphur and Charcoal
Q.541. Which of the following mixture cause the explosion of TNT (Trinitrotoluene)
➥Ammonium Nitrate
Q.542. Which of the following Isotope is used in the production of Nuclear Energy?
➥U-235
Q.543. High amount of energy is released in the explosion of atomic bomb is due to–
➥Conversion of Mass into energy
Q.544. Tritium is an Isotope of –
➥Hydrogen
Q.545. In India Nuclear Weapon was tested at –
➥Pokhran
Q.546. Nuclear Power Reactor act on the Principle of–
➥Fission
Q.547. The two elements which are used to absorb the neutrons in nuclear fission during chain reaction
➥Boran and Cadmium
Q.548. Fuel used in Nuclear reactor is –
➥Uranium
Q.549. Graphite is used as a… in nuclear reactors.
➥Moderator
Q.550. Heavy water used as a coolant in nuclear reactor. Heavy Water is:
➥Water containing heavy Isotopes of Hydrogen atom
Q.551. In nuclear reactor, Neutrons are slowdown by the
➥Moderator
Q.552. Who discovered the natural radioactivity?
➥Henri Becquerel
Q.553. Radioactive decay of uranium resulted the formation of final product–
➥Lead
Q.554. Uranium eventually decays into a stable isotope of –
➥Lead
Q.555. In the treatment of skin disease the radio isotope used is–
➥Radio Phosphorous
Q.556. Radioactivity is Measured by –
➥Giger – Muller counter
Q.557. The most suitable unit to express the nuclear radius is –
➥Fermi
Q.558. Radioactive Noble Gas is–
➥Rn
Q.559. There is no change in radioactive element (Mass or change) during –
➥Gamma emission
Q.560. Radioactivity is the fission of –
➥Nucleus
Q.561. Quality of Petrol expressed in terms of
➥Octane number
Q.562. In LPG cylinder under the High Pressure mainly mixture of Gases filled in Liquid form –
➥Propane and Butane
Q.563. Kitchen or Cooking Gas is a mixture of –
➥Butane and Propane
Q.564. PNG (Piped Natural Gas) is used for –
➥Cooking
Q.565. TEL (Tetra Ethyl Lead) is a –
➥An anti knock Compound
Q.566. Wax used for making candles is chemically a mixture of–
➥Aliphatic Hydrocarbons
Q.567. Petroleum is a Mixture of –
➥Hydrocarbons
Q.568. Glycol is added to aviation gasoline because it
➥Prevents freezing of petrol
Q.569. Water is not effective in extinguishing a fire caused by petrol because–
➥Water and petrol are immiscible with each other and petrol which forms upper Layer continuous to burn.
Q.570. Diesel oil is prefer for Heavy Motor Vehicles because it–
➥It has more capacity and fuel save
Q.571. The temperature of oxy–acetylene flame is around–
➥32000C
Q.572. Rayon is formed by –
➥Cellulose
Q.573. Polyethene is formed by –
➥Ethylene
Q.574. Glycogen, Cellulose and starch are the polymers of–
➥Glucose
Q.575. The process of Heating of Rubber with sulphur to increase it quality is known as –
➥Vulcanization
Q.576. Natural rubber is a polymer of–
➥Isoprene
Q.577. Afriline is a –
➥Fiber
Q.578. PVC is obtained by the polymerization of –
➥Vinyl chloride
Q.579. The gas that usually cause explosion in coal mines is–
➥Methane (CH4)
Q.580. Bakelite and Phenol are the polymers of–
➥Formaldehyde
Q.581. Silicon is a Polymer of
➥Dialkyal dichloro silane
Q.582. Which gas used as an anesthetic?
➥Nitrous oxide
Q.583. The drug which Lowers anxiety and provide Peace –
➥Tranquilizer
Q.584. The branch of medicine involving synthetic chemical compounds is–
➥Allopathic
Q.585. The pair of compounds used as anesthetic in medicine is –
➥Nitrogen dioxide, chloroform
Q.586. Fluid used commonly in making Bio-gas –
➥Animal Wast
Q.587. Gobargas mainly contains
➥Methane
Q.588. Main Constituent of air is–
➥Nitrogen
Q.589. Zinc Phosphide is commonly used as –
➥Rodenticide
Q.590. Oxides of sulphure present in atmosphere washed down by rain to cause–
➥Lowering of PH of soil
Q.591. Green House effect means
➥Trapping of solar energy due to carbon dioxide.
Q.592. Depletion of ozone Layer is mainly due to –
➥Chlorofluoro carbons
Q.593. Which atmospheric gas absorbs ultraviolet rays?
➥Ozone
Q.594. Pasteurization is a process in which milk is Heated at–
➥630C for 30 min
Q.595. Combustion is a –
➥Chemical Process
Q.596. Chief pollution of smoke of cigarette is–
➥Carbon monoxide and nicotine
Q.597. Smoke of tobacco is Injurious to Health because it contains –
➥Nicotine
Q.598. Producer gas is Highly Poisonous due to the presence of –
➥Carbon Monoxide
Q.599. It is not advisable to sleep under the tree at night because trees release–
➥Carbon dioxide
Q.600. The calorie requirement of the body increases in winter as compared to summer because ore calories are necessary to
➥Sustain body temperature
