If an isotope of uranium, uranium-235, has 92 protons, how many protons does the isotope uranium-238 have A carbon atom with 6 protons, 6 electrons, and 6 neutrons would have a mass number of Which of the following ion has the largest radius The total value of magnetic quantum number for n = 4 Number of mole of 1 m³ gas at NTP are In Cu (Atomic no. – 29) How many alkene form by C₅H₁₀ (including stereo isomers) Two liquids A and B are at 32°C and 24°C. When mixed in equal masses the temperature of the mixture is found to be 28°C. Their specific heats are in the ratio of? Which of the following statements about a compound is incorrect Which element has the atomic number 3? Fe has 26 protons in its nucleus. What are the number of electrons in Fe²+ ( II ) ion? Which of the following elements has the lowest melting point? The Chemical formula of Ammonium nitrate is _________ The Energy Of The Sun Is Mainly Due To ? Milk Is A Colloidal System In Which ? Diamonds Are Glittering And Attractive Because Light Incident On Them Undergoes ? Which Of These Acids Is Not Organic In Origin? The Bhopal Tragedy Was Caused By The Gas ? The Gas Which Is Mainly Responsible For The Greenhouse Effect Is ? Nowadays Yellow Lamps Are Frequently Used As Street Lights. Which Of The Following Gases Is Used In These Lamps ? Cement Is Usually A Mixture Of ? What Is The Most Commonly Used Substance In Fluorescent Tubes? Which Of The Following Is Riot A Greenhouse Gas ? Rusting Of Iron Takes Place Due To ? Milk Tastes Sour When Kept In The Open For Sometime Due To The Formation Of? Which Of The Following Is A Super Cooled Liquid ? The Chemical Used In Embalming Biological Materials Is ? The Acid Rain Destroys Vegetations Because It Contains ? The Ratio Of Pure Gold In 18 Carat Gold Is ? The Element With Highest First Ionisation Energy Is ? The Temperature Of Oxyacetylene Flame Is Around ? German Silver Is An Alloy Of ? Magnesium Is An Alloy Of ? Petroleum Consists Of A Mixture Of? Stainless Steel Is An Alloy Of ? Muscle Fatigue Is Caused By The Accumulation Of? Which One Of The Following Metals Is Used To Galvanise Iron? The Purest Form Of Water Is ? Ozone Layer Is Present In ? By Which Organic Compound All The Oils Arc Known ? The Function Of Skimming Tank In Sewage Treatment Is To Remove ? Cement Is Made Hard With ? Diamond Is Harder Than Graphite Because Of ? Type Metal Used In Printing Press Is An Alloy Of ? Which Of The Following Elements Is Not Present In Stainless Steel? ? The Isotope Used For The Production Of Atomic Energy Is ? Which Of The Following Is Chiefly Present In LPG (Liquefied Petroleum Gas)? Galvanization Is The : ? Aspirin Is ? The Polymer Used In Making Plastic Crockery Is ? Galena Is A Mineral Of ? Detergents Used For Cleaning Clothes And Utensils Contain ? An Emulsifier Is An Agent Which ? Epsom Salt Is Used ? Which Of The Inert Gases Can Form Compounds? The Fiber Least Prone To Catch Fire Is ? Cement Is Formed By Strongly Heating A Mixture Of ? The Anode In A Dry Cell Consists Of ? Helium Gas Is Used In Gas Balloons Instead Of Hydrogen Gas Because It Is ? A Metal Is Exposed To The Atmosphere For Sometime It Becomes Coated With Green Carbonate. The Metal Must Be ? Which Is Abundant In Gobar Gas? Gobar Gas Basically Contained ? Glycol Is Added To Aviation Gasoline Because It ? The Major Harmful Gas Emitted By Automobile Vehicles Which Causes Air Pollution Is ? Which Of The Following Fibres Catches Fire Least ? Of The Following Which One Pollutes The Air Of Abig City ? ? Which Of The Following Is Used To Remove Ink And Rust Stains On Cloth? ? Refrigerators Keep Food Unspoiled Because ? Solder Metal Is An Alloy Of ? The Major Constituent Of Air Is ? Which Of The Following Is An Iron Ore ? Glass Is A ? The Mass Number Of A Nucleus Is. ? Which Of The Following Is A Natural Dye ? Denatured Spirit Is Ethanol Mixed With ? One Of The Following Is Used To Dissolve Noble Metals. That Is ? Which Of The Following Metals Form An Amalgam With Other Metals ? ? Dry Powder Fire Extinguishers Contain ? The Material Used In The Manufacture Of Lead Pencil Is ? Which One Of The Following Is An Example Of A Gel ? ? The Coloured Discharge Tubes Foradvertisement Mainly Contain ? Which Of The Following Metals Occurs In Free State ? The Cathode Of A Lead Storage Battery Is Made Up Of ? Which Of The Following Processes Is Used For The Production Of Biodiesel? ? Vulcanization Of Rubber Is Carried Out By Adding ? Which One Of The Following Is Known As The Brown Coal ? ? A Polymeric Substance Used To Make Parachute Is ? The Chemical Name Of Ratpoison Is H ? Metal Are Good Conductors Because ? Wood Spirit Is ? Which One Of The Following Pairs Is NOT Correctly Matched? Among The Fuels Given Below The One With Highest Calorific Value Is ? In Which Of The Following States Maximum Iron Ore Is Found ? Which One Of The Following Metals Pollutes The Air Of A City Having Large Number Of Automobiles? The Addition Of Gypsum To Portland Cement Helps In ? What Is ''Milk Of Magnesia” Chemically ? What Is ''Milk Of Magnesia” Chemically ? ? The Chemical Bahaviour Of An Atom Depends Upon ? Cement Containing Excess Amount Of Lime ? Mortar Is A Mixture Of Water Sand And ? Tear Gas Is? Black Lung Disease Occurs In People Working In ? Chemical Name Of Bleaching Powder Is ? Bleaching Action Of Moist Sulphur Dioxide Is Because Of Its? Which Of The Following Is Used In Making Smoke Bombs? If All Bullets Could Not Be Removed From Gunshot Injury Of A Man It May Cause Poisoning By ? An Atomic Dock Is Based On Transitions In ? Which Of The Following Could Be Used As Fuel In Propellant Or Rockets ? Galvanization Of Iron Is Carried Out Using ? For a certain reaction PV = 2 dm3 atm and volume is 4 dm3 then corresponding pressure is ? Mathematical expression that describes Boyle's law is ? Average kinetic energy of gas molecules is directly proportional to ? At constant pressure average kinetic energy of gas molecules increases 2 times if ? Temperature at which solid starts melting is called ? Conversion of a liquid to a gas at all temperatures is called ? Process in which solid changes directly in to vapors without changing in liquid state is called ? In periodic table, helium is placed at ? Both of elements of 1st period contains valence electrons in ? Number of protons and neutrons in nucleus if atomic number of element is 17 and mass number is 35, is ? A balloon filled with 5g of hydrogen contains ? A hydrogen atom is ? A substance whose all atoms have same atomic number is ? Gram atomic mass of Zn is ? When halogens are exposed to sunlight, they split up in to ? Cookies and bread rise due to ? Substance which has formula mass of 133.5 amu is ? Mass of carbon present in 44g of carbon dioxide is ? Formula which gives simplest whole number ratio of atoms is ? Matter is anything that occupies ? Mass of 1 mole of sucrose is ? Branch of chemistry which deals with substance containing carbon is called ? Number of atoms in 5 moles of nitrogen atom is ? Number of atoms of hydrogen in 2 moles of NH3 ? Negatively charged ions are called ? Molecular mass of glucose is ? A science that examines material this universe contain and changes in them is called ? If one mole of carbon contains x atoms then number of atoms in 12g of Mg are ? Species present in a substance refers to ? Formula mass of NaCl is ? In glucose simplest ratio between C, H and O is ? Gram molecular mass of C6H12O6 is ? An ionic compound is electrically ? 6.022 * 1023 atoms of Sulphur contains ? Molecular formula gives ? Vinegar contains ? An oxide ion has -2 charge because ? Compounds have atoms of ? Number of protons in nucleus constitute it's ? 1 mole of substance refers to ? Branch of chemistry dealing with plantation and overcoming greenhouse effect is ? A free radical has ? Smallest part of an element that cannot exist as a free state is ? Formula mass indicates simplest ration between ? List which contains only elements is ? Over 70% of earth's crust is covered with ? Mass of an atom relative to C-12 is ? Relative atomic mass of Na is ? A mole of any substance contains ? Mass number of an atom is ? Biochemistry deals with ? Ca on loosing 2 electrons becomes ? If 9.05 moles of ozone is formed in a storm then mass of ozone is ? Natural force that holds together elements together is called ? Hair contains keratin proteins which are also present in nails and wool is an example of ? Empirical formula for water is ? Free radicals are electrically ? A mixture that consists of different components is called ? Element reduced in following reaction 2Ca + O2 2CaO is ? Rusting of iron occurs due to ? A concentrated aqueous solution of sodium chloride is called ? Electrolytes convert electricity in ? In thermal power stations carbon atoms undergo oxidation to form ? Electrodes used in production of sodium metal are ? In chromium plating few drops of Sulphuric acid are added to electrolyte in order to prevent ? By losing one or two electrons atoms of metal are ? A reactant containing element that is oxidized is called ? Electrolysis of brine produces ? When zinc is plated on steel, anode is made up of ? Galvanic cells are also named as ? Oxidation state of any free element is always ? Voltaic cells generates electricity by ? A physical or chemical process that occurs by itself is called ? Process used to deposit one metal over another metal is called ? Electrolyte among following is ? Electrochemical cells convert ? Conditions for good electroplating are ? Lead and Zinc metals occur naturally as ? Oxidation-reduction reaction involves ? As compare to iron, aluminum has ? An electrochemical cell is also called ? In a dry cell anode is made up of ? Elements whose oxidation number is increased are ? Loss of hydrogen atoms by an element is called ? An electrolytic cell uses electrical energy to drive ? Electrolyte used for tin plating is ? Corrosion can be prevented by ? On industrial scale sodium metal is prepared by electrolysis of fused ? Process in which substance gains electrons is called ? As we move across period basic character of oxides ? Boron is a ? Metallic oxides are ? Non-metals are poor conductors of ? Tendency of a metal to loose electron is called ? Most acidic among following is ? Halogens react with metals to form ? Oxide of aluminum is ? As compare to beryllium, magnesium is ? Bromine is a non-metal in ? As size of atom increases down group, electro positivity ? Elements which have properties of metals and non-metals are ? Sodium metal is soft due to ? As we move across period from left to right, reactivity of metals with oxygen ? As we move across period electronegativity ? On contact with oxygen, Rubidium forms ? Metals difficult to oxidize are called ? Which one is the cofactor of carbonic anhydrase? Copper deficiency causes ? pH value of water is ? The number of electrons and neutrons of an element is 18 and 20 respectively. Its mass number is ? Adding common salt to distilled water makes it? Electroplating is based on? Plastic wire is? Hen’s egg is a? The calls capable of changing shapes are? Cell is discovered by? Tissue is a? Single celled organisms are called? The control unit of cell is? Chloroplast is found in? The functional unit of life is called? The kitchen of the cell is called? The power house of cell is called? The chemical formula of caustic potash is? Which of the following does not form an acidic salt? The difference of molecules of water in gypsum and PoP is? The Ph of a solution of HCL is 4. This shows that the molarity of the solution is? The function of quick lime in soda lime mixture is to? Which of the following salts has no water of crystallization? The nature of calcium phosphate is present in tooth enamel is? Which one of the following will turn red litmus blue? Which one of the following is acidic? The tilting of the earth is responsible for? Stars appear to move from? What is the gap between the orbit of mars and Jupiter called? The Internet is an example o1 safs? Alum is used? If people sleep in closed rooms where charcoal fire is burning , they die due to ? A bond formed by the transfer of electrons between atoms of the elements is called How many Covalent Bonds can Nitrogen form? What is the structure of IF7? Hydrogen bomb is based on the principle of? A mixture of sand and naphthalene can be separated by? The purest form of iron is ? A burning matchstick is brought in contact with hydrogen gas ? The element phosphorus makes what part of human weight ? CuSO4.5H2O is the chemical formula of? The main constituent of biogas is? One fathom is equal to? Epoxy resins is used as? Glass is made from the mixture of? The major ingredient of leather is? The recent atomic weight scale is based on? According to Dalton’s atomic theory the smallest particle which can exist independently is? Which of the following elements is non-radioactive? The most important ore of Aluminium is? Which of the following is the lightest metal ? Which of the following gases is used for refrigeration? The acid use in lead storage cells is? Aluminium is obtained by the electrolysis of pure Al2O3 dissolved in? The three methods of science are observation, experimentation and ? Which gas in the atmosphere saves us from the ultra violet rays of the sun? With the help of which reaction cyclohexanone is converted into cyclohexane? A radioactive substance decays to 3/4 of its original value in 2h. The half? Which of the following is not a chalcogen? Which of the following varies with change in temperature? If the vapour denisty of a gas is molecular mass will be? pH value of neutral solution is? The ratio of y for inert gases is? The maximum number of hydrogen bonds is a H2O molecule is? An element X forms an oxide XO3 What is the valency of X? The word ‘insolation’ means? Neutron was discovered by? Who among the following proposed that atom is indivisible? Oxygen and ozone are ? Bar is a unit of? The most abundant elements is? The major combustible component of gobar (cow? The National Chemical Laboratory is located in? What is the pH of pure water ? Out of 92 naturally occurring chemical elements how many are considered as bio? Normal valence of nitrogen is ? pH value of water is ? The number of electrons and neutrons of an element is 18 and 20 respectively. Its mass number is ? The chemical name of Chloroform is ?