DAY 1 Chem Eng Boards - pt. 8 (701-800+)
A change in which no new substances are formed is called _____________. A) Physical Change B) Chemical Change C) Rusting D) Galvanisation
A
Acetic Acid is another name for which of the following? A) Vinegar B) Baking Soda C) Copper Sulphate D) Magnesium Oxide
A
Atomic number of which of the following elements is greater than that of Chlorine A) Potassium B) Sulphur C) Aluminum D) Phosphorus
A
Bauxite is an ore/mineral of A) Aluminum B) Beryllium C) Lead D) Tin
A
Bauxite is used as raw material by which industry A) Aluminum B) Iron C) Steel D) Gold
A
Besides CO2, the other green house gas is A) CH4 B) N2 C) Ar D) O2
A
Chemical properties of isotopes ............. A) must be same B) must be different C) need not be same D) need not be different
A
Fe has 26 protons in its nucleus. What are the number of electrons in Fe2+ (II) ion? A) 24 B) 26 C) 28 D) 13
A
Give an example of a salt which gives an aqueous solution of pH less than 7. A) Ammonium chloride B) Sodium carbonate C) Sodium bicarbonate D) Sodium chloride
A
Highest percentage of carbon is found in which form of coal? A) Anthracite B) Bituminous C) Peat D) lignite
A
In Mendeleev's periodic table, the properties of the elements are considered a periodic function of their: A) Atomic mass B) Ionization enthalpy C) Atomic size D) Atomic number
A
Isobars have _______. A) Same mass numbers but different atomic numbers B) Different mass numbers but same atomic numbers C) Same mass and atomic numbers D) Different mass and atomic numbers
A
Phosphorus is kept in water because A) its ignition temperature is very high B) its ignition temperature is very low C) its critical temperature is high D) its critical temperature is low
A
Researchers at the University of Illinois have discovered new form of matter called Excitonium which was coined by ______ in the 1960' A) Bertrand Halperin B) Eugene Wigner C) Paul Dirac D) Felix Bloch
A
Sour taste of lemon is due to the presence of which of the following ? A) Citric acid B) Acetic acid C) Oxalic acid D) Formic acid
A
The absolute zero is a temperature at which _______ A) molecular motion in a gas would cease B) water freezes C) all gases become liquid D) all gases become solid
A
The compound used in prickly-heat powder to prevent excessive sweating is A) Boric acid B) Phosphoric acid C) Carbonic acid D) Sulphonic acid
A
The elements known as primary nutrients for plants A) Nitrogen, Phosphorus and Potassium B) Nitrogen, Oxygen and Silicon C) Potassium, Boron and Nitrogen D) Nitrogen, Phosphorus and Iron
A
The mass of proton and mass of ________ is same. A) Neutron B) Electron C) Isoprone D) Alpha particle
A
The most pure form of carbon among the options is A) Anthracite B) Lampblack C) Graphite D) Wood Charcoal
A
The oceanic crust mainly consists of silica and __________. A) magnesium B) iron C) manganese D) sulphur
A
Turquoise is an ore/mineral of A) Copper B) Manganese C) Mercury D) Tin
A
What is the chemical formula of aluminium nitride? A) AlN B) Al2N C) AlN2 D) AlN3
A
What is the natural source of Oxalic acid? A) Tomato B) Sour milk C) Ant sting D) Tamarind
A
What is the number of groups and periods in the modern periodic table? A) 18, 7 B) 18, 8 C) 16, 7 D) 16, 8
A
What is the product formed when sodium bicarbonate is heated strongly? A) Sodium Carbonate B) Sodium Hydroxide C) Sodium Peroxide D) Sodium Monoxide
A
Which among the following has the maximum density? A) Water B) Ice C) Ethylene D) Acetone
A
Which among the following is not a characteristic of oxidation reaction? A) It involves addition of hydrogen B) It involves addition of oxygen C) It involves loss of electrons D) 4) It involves addition of electronegative element
A
Which among the following will be a negative ion? A) If it has more electrons than protons B) If it has more electrons than neutrons C) If it has more protons than electrons D) If it has more protons than neutrons
A
Which gas contributes most to the Greenhouse effect? A) Water vapour B) Ozone C) Oxygen D) Nitrogen
A
Which of the following gas leaked in the Bhopal Gas tragedy in December 1984? A) Methyl isocyanate B) Methyl isochlorate C) Methyl Phosphate D) Methyl Isopropate
A
Which of the following green house gases has the greatest heat-trapping ability? A) Chlorofluorocarbon B) Methane C) Carbon dioxide D) Nitrous oxide
A
Which of the following is a greenhouse gas or a gas which can deplete the ozone layer? A) CH2ClF B) C2H2 C) PF5 D) COCl2
A
Which of the following is a greenhouse gas or a gas which can deplete the ozone layer? A) N2O B) AsH3 C) N2 D) C5H12
A
Which of the following statement(s) is/are INCORRECT regarding Phosphorus? A) Phosphorus reacts vigorously with water B) It is a non-metal C) It catches fire on reacting with air D) It is found in group 15 of the modern periodic table
A
Which one of the following gases dissolves in water to give acidic solution? A) Carbon dioxide B) Oxygen C) Nitrogen D) Hydrogen
A
Which one of the following is a good electrical conductor? A) Graphite B) Diamond C) Peat D) Charcoal
A
Which one of the followingis notan allotrope of carbon? A) Coal B) Diamond C) Graphite D) Graphene
A
At low temperature, Lead behaves as a : A) Semi conductor B) Super conductor C) Insulator D) Conductor
B
Atomic number of an atom gives the number of which of the following ? A) electrons B) protons C) neutrons D) neutrons and protons
B
Atoms of same element having different mass numbers are called__________ A) Isobars B) Isotopes C) Isotones D) Isomers
B
Chemical formula for sulphurous acid is: A) H2SO4 B) H2SO3 C) H3SO3 D) H3SO4
B
Chlorine gas is used in the manufacture of: A) Baking powder B) Bleaching powder C) Baking soda D) Washing soda
B
Haematite is an ore/mineral of A) Zinc B) Iron C) Lead D) Manganese
B
Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in A) Conduction B) Convection C) Radiation D) Both conduction and convection
B
Iron and manganese present as pollutants in water cannot be removed by_____ A) oxidation followed by settling and filtration B) chlorination C) ion exchange process D) lime soda process or manganese zeolite process
B
Process of gaining electrons is known as _____. A) oxidation B) reduction C) radiation D) both oxidation and reduction
B
The Chemical formula of Ammonium nitrate is ___________. A) (NH2)2NO3 B) NH4NO3 C) NH4(NO3)2 D) NH2NO3
B
The common name of dichlorodifluoromethane is _____. A) galena B) Freon C) gypsum D) borax
B
The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 3rd group and the 4th period? A) 23 B) 21 C) 19 D) 11
B
The reactions in which oxidation and reduction occur simultaneously are called _______. A) Feral reactions B) Redox reactions C) Demug reactions D) Kerol reactions
B
The temperature at which a solid melts to become a liquid at the atmospheric pressure is called its ___________. A) Crystallisation B) Melting point C) Evaporation D) Galvanisation
B
Uraninite is an ore/mineral of _______. A) Zinc B) Uranium C) Titanium D) Aluminium
B
What happens in an oxidation reaction? A) Protons are lost. B) Electrons are lost C) Neutrons are lost. D) Electrons are gained.
B
When Granite rocks get metamorphosed, they form A) Quartzite B) Gneiss C) Marble D) Slate
B
When iron rusts, its weight ..... A) decreases B) increases C) remains the same D) first increases and then decreases
B
Which among the following difference between aerobic and anaerobic respiration is INCORRECT? A) Aerobic respiration takes place in presence of oxygen - Anaerobic respiration takes place in the absence of oxygen B) In Aerobic respiration pyruvate is broken down into ethanol and carbon dioxide - In Anaerobic respiration pyruvate is broken down into carbon dioxide and water C) In Aerobic respiration more energy is released - In Anaerobic respiration less energy is released D) Aerobic respiration takes place in mitochondria- Anaerobic respiration takes place in yeast
B
Which among the following is false about alpha particles? A) They have high ionizing power B) They have high penetrating power C) They have high kinetic energy D) They are positively charged helium nuclei
B
Which among the following is used to generate light, to weld metals? A) Ethylene B) Acetylene C) Glycol D) Oxalic acid
B
Which of the following elements has the lowest melting point? A) Chromium B) Hydrogen C) Zinc D) Silver
B
Which of the following is also used as a Bio fertilizer? A) Urea B) Ammonia C) Uric Acid D) Nitrates
B
Which of the following is used as anaesthetics? A) N2 B) N2O C) CH4 D) CO2
B
Which of the following molecules is joined by a double covalent bond? A) Cl2 B) O2 C) N2 D) He2
B
Which of the following statement(s) is/are CORRECT? A) Oxides of non-metals are basic B) Oxides of non-metals are acidic C) Oxides of metals are acidic D) All options are correct
B
Which one of the following elements is used as a timekeeper in atomic clocks? A) Potassium B) Cesium C) Calcium D) Magnesium
B
Which one of the following is not a characteristic of a compound? A) Composition is variable. B) All particles of compound are of only one type. C) Particles of compound have two or more elements. D) Its constituents cannot be separated by simple physical methods
B
Who among the following laid the foundation of chemical sciences by establishing two important laws of chemical combination? A) Joseph L. Proust B) Antoine L. Lavoisier C) Ernest Rutherford D) Democritus
B
Who invented the modern periodic table? A) Faraday B) Mendeleev C) Newton D) Bohr
B
Zeolite is A) hydrated ferric oxide B) hydrated sodium aluminium silicate C) sodium hexameta phosphate D)sodium tetra borate
B
_____ is used for making chemical apparatus like beakers, flasks etc. A) Potash glass B) Hard glass C) Jena glass D) Soda glass
B
_____________ is a multibranched polysaccharide of glucose that serves as a form of energy storage in animals and fungi. A) None of the above B) Glycogen C) Pectin D) Chitin
B
_______gives hardness to stainless steel. A) Zinc B) Carbon C) Lead D) Tin
B
.......... is not a sub atomic particle of an atom. A) Neutron B) Electron C) Xenon D) Proton
C
Acid rain is caused due to pollution of atmosphere by A) oxides of nitrogen and sulphur B) oxides of nitrogen and phosphorous C) oxides of carbon and nitrogen D)oxides of nitrogen and methane
C
Alpha particles are ___________. A) twice the mass of beta particles B) negatively charged C) just like helium nuclei D) lower in ionizing power as compared to gamma rays
C
Atomic number of which of the following elements is greater than that of Copper? A) Iron B) Chromium C) Zinc D) Manganese
C
By which of the following processes are metals of high reactivity extracted from purified molten ore? A) Reduction by an appropriate reducing agent B) Roasting C) Electrolysis D) Calcination
C
Chromite is an ore/mineral of A) Zinc B) Uranium C) Chromium D) Titanium
C
Fire extinguishers emit which gas? A) Carbon monoxide B) Chlorine C) Carbon dioxide D) Nitrogen
C
Glycol is used to manufacture which of the following ? A) Nylon B) Artificial silk C) Terylene D) Rubber
C
Limestone is a raw material used by which industry? A) Aluminium B) Fertilizers C) Cement D) Petrochemicals
C
Manganite is an ore/mineral of A) Beryllium B) Chromium C) Manganese D) Copper
C
Release of which among the following is the primary reason for depletion of the ozone layer? A) Nitrous oxide B) Hydrogen dioxide C) Chlorofluorocarbon D) Carbon monoxide
C
Rusting is _____. A) Electrolysis B) Oxidation C) Redox reaction (Oxidation and Reduction) D) Reduction
C
The depletion in Ozone layer is caused by ___________ . A) Nitrous oxide B) Carbon dioxide C) Chlorofluorocarbons D) Methane
C
The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 1st group and the 4th period? A) 21 B) 17 C) 19 D) 9
C
The most extensive use of molasses after fermentation is for producing A) Methanol B) Sugar C) Ethanol D) Sugarcane
C
What are Aldehydes ? A) Mild oxidising agents B) Strong oxidising agents C) Strong reducing agents D) Mild reducing agents
C
Which among the following is white phosphorus? A) P1 B) P6 C) P4 D) P5
C
Which of the following elements has the electronic configuration 2, 8, 3? A) Magnesium B) Sodium C) Aluminum D) Argon
C
Which of the following elements has the lowest melting point? A) Titanium B) Sulphur C) Argon D) Zinc
C
Which of the following is essential for the synthesis of thyroxin? A) Potassium B) Calcium C) Iodine D) Sodium
C
Which of the following is the best fire-extinguisher? A) Water B) Oxygen C) Carbon-dioxide D) Soil
C
Which of the following statement is CORRECT? A) Gold and Silver are not ductile. B) Phophorus and Nitrogen are ductile. C) Copper and Platinum are ductile. D) Sulphur and Phophorus are sonorous
C
Which one of the following cell organelles mainly functions as storehouse of digestive enzymes? A) Desmosome B) Ribosome C) Lysosome D) Vacuoles
C
Which one of the following elements is essential for the formation of chlorophyll in green plants? A) Calcium B) Iron C) Magnesium D) Potassium
C
Which one of the following is a bad Thermal Conductor? A) Aluminium B) Copper C) Glass D) Silver
C
______ is an anaesthetic agent. A) Acetylene B) Glycol C) Diethyl ether D) Ethylene
C
___________ is obtained by evaporation of sea. A) Sugar B) Iron C) Salt D) Steel
C
A change in which a substance undergoes a change in its physical properties is called _____________. A) Chemical Properties B) Physical Properties C) Chemical Change D) Physical Change
D
Aromatic hydrocarbons contain at least _____ benzene like ring in their molecules. A) 4 B) 3 C) 2 D) 1
D
Cinnabar is an ore/mineral of A) Lead B) Manganese C) Molybdenum D) Mercury
D
Constantan is alloyed from ...... metals. A) Ni, Ti, Fe, Cr B) Cu, Ni, Mn C) Ni, Cr, Mn, Fe D) Cu, Ni
D
Magnesium oxide (MgO) + Water (H2O) = ? A) [Mg(OH)] B) [Mg(O2H)2] C) [Mg2(OH)] D) [Mg(OH)2]
D
Metals react with sodium hydroxide to produce ___________. A) oxygen gas B) sodium C) water D) hydrogen gas
D
The atoms of Germanium, Arsenic, Selenium and Bromine contain ...... shells. A) 3 B) 7 C) 5 D) 4
D
The force that a neutron exerts on a proton inside an atom is: A) Tidal force B) Gravitational force C) Electrostatic force D) Nuclear force
D
The reaction of Copper Sulphate and Iron produces Iron Sulphate and __________. A) Vinegar B) Ash C) Baking Soda D) Copper
D
The upper part of the heterosphere is composed almost completely of which gas? A) Ozone B) Nitrogen C) Oxygen D) Hydrogen
D
Trinitrotoluene is A) used to melt metals B) used to fuse two metals C) used as an abrasive D) used as an explosive
D
What is the full form of PVC? A) Phosphonil vinyl Carbonate B) Polyvinyl S Carbonate C) Polyvinyl Carbonate D) Polyvinyl Chloride
D
Which among the following is an example of mixture? A) Milk B) Gasoline C) Liquefied petroleum gas D) All options are correct
D
Which drug is used as a Nonsteroidal anti-inflammatory drug? A) Risedronate B) Diazepam C) Folic Acid D) Ibuprofen
D
Which gas is released when water is added to bleaching powder? A) Oxygen B) Hydrogen C) Carbon dioxide D) Chlorine
D
Which is the most economical method of removing solid matter from water? A) Using deactivated carbon B) Electrolysis C) Distillation D) Sedimentation
D
Which of the follow is the last element in Newlands Law of Octaves classification? A) Rhodium B) Radium C) Iron D) Thorium
D
Which of the following gases is not generated in a biogas plant? A) H2S B) CO2 C) CH4 D) CO
D
Which of the following is a commercial source of energy? A) Agricultural waste B) Dried dung C) Sun D) Natural gas
D
Which of the following is a natural polymer? A) Bakelite B) Nylon C) Polythene D) Starch
D
Which of the following is false? A) Hydrogen atom is roughly a third of the mass of tritium B) Deuterium is called heavy hydrogen C) Deuterium atom has 1 neutron D) Protium is the rarest isotope of hydrogen
D
Which of the following is not a component of Smog? A) Volatile organic compounds B) Nitrogen Oxide C) Sulphur dioxide D) Chlorine oxide
D
Which of the following is not a nitrogenous fertiliser? A) Ammonium sulphate B) Urea C) Ammonium nitrate D) Superphospohate
D
Which of the following is usually not an airpollutant? A) Hydrocarbons B) Sulphur dioxide C) Carbon dioxide D) Nitrous oxide
D
Which of the following statement is INCORRECT regarding Sodium? A) Sodium reacts vigorously with oxygen and water B) A lot of heat is generated when sodium reacts with water and oxygen C) It is stored in kerosene D) It is a non-metal
D
Which one of the following is the correct relation between the Kelvin temperature (T) and the Celsius temperature (fc)? A) These are two independent temperature scales B) T = tc C) T = tc - 273.15 D) T = tc + 273.15
D
________ is used for making vinegar. A) Tartaric acid B) Malic acid C) Oxalic acid D) Acetic acid
D
_______________ of a material is defined as the minimum amount of the work necessary to remove a free electron from the surface of the material. A) The electro-repulsive force B) The coulomb factor C) The power factor D) The work function
D
