0% 0 Chemistry Quiz 15 1 / 50 Isotopes differs in______________________? arrangement of electrons in orbitals chemical properties properties depend upon mass position in the periodic table 2 / 50 Special features of borate glass is that it is_________________? Heat resistant Green in colour Low melting Used to prepare chemical garden 3 / 50 Which law states that ?equal volumes of all gases, at the same temperature and pressure, have the same number of molecules? Boyle?s law Avogadro?s?law Charles? law Gay-Lussac?s law 4 / 50 Which one of the following is not a semiconductor ? Si Sn Ge Se 5 / 50 During sulphonation of benzene H2SO4 generates the electrophile _________________? H+ HSO4- SO3 SO2 6 / 50 The concept of ensemble was introduced by____________? Boltzmann Gibbs Mexwell Carnot 7 / 50 The half cells are interconnected through________________? salt bridge electric circuit no connection exists wire 8 / 50 95% ethanol is called_________________? absolute alcohol rectified spirit methylated spirit wood spirit 9 / 50 According to vital force theory_______________? organic compounds can be synthesized by animals Oorganic compounds can be synthesized from inorganic compounds organic compounds can be synthesized by plants organic compounds cannot be synthesized from inorganic compounds 10 / 50 K2Cr2O7/H2SO4 generate____________________? Nascent hydrogen[H] Hydrogen Oxygen Nascent oxygen[O] 11 / 50 If internal energy of the system is increased ____________________? All Temperature of the ystem may rise Chemical reaction may take place Change in state of the system is increased 12 / 50 Find the PH of a 0.001 M solution of Nitric acid HNO3? 3 5 4 2 13 / 50 Voltaic cell can be recharged by______________? by heating it by addition of fresh solution by removal of solution by replacing external circuit with external source of electricity 14 / 50 Concept of Triads was introduced by_______________? Dobereiner Al-Razi Mendeleev Newland 15 / 50 Which of the following alloys contain(s) Cu and Zn? Bronze Type metal Brass Gun-metal 16 / 50 Borax is a white crystalline solid and it is_________________? More soluble in hot water Insoluble in water More soluble in cold water Soluble only in organic solvents 17 / 50 Regular coiling or zigzagging of polypeptide through hydrogen bonding is its___________________? Secondary structure Tertiary structure Primary structure Quantum structure 18 / 50 Boiling points of hydrocarbons increase with the increase in number of carbon atoms. It is mainly due to_________________? Less polarizability More strength of London forces More strength of H-bonding All of the above 19 / 50 Equilibrium state is achieved quickly by the addition of ________________? acid reactants catalyst base 20 / 50 Noble gases are named so because they are__________________? less reactive Having completely filled valence shell Zero group elements All 21 / 50 Nitration of chlorobenzene gives___________________? o ? chloronitrobenzene A & B m ? chloronitrobenzene p ? chloronitrobenzene 22 / 50 E0red of an element cab be calculated by comparing it with _____________________? 2M solution of HCI 1M solution of ions of respective element SHE New electrode of same element 23 / 50 Which of the following phenomenon is considered responsible for Global Warming? Monsoon Fire in coal mines Greenhouse effect Dry farming 24 / 50 A 10 volume solution of H2O2 means_______? 10 gram equivalents of H2O2 liberates 10 mL of O2 at STP 10 litres of H2O2 liberates 19 mL of O2 at STP 10 grams of H2O2 solution liberate 10 mL of O2 at STO 1mL of solution of H2O2 liberates 10 mL of O2 at STP 25 / 50 Hydrogen effuses four times more rapidly than volume of an unknown gas molar mass of unknown gas should be_______________? 64 gmol-1 16 gmol-1 48 gmol-1 32 gmol-1 26 / 50 Solubility of CaF2 is 2.0?10-4 gdm-3 then Ksp of CaF2 is_______________? 2.0 x 10-8 4.0 x 10-12 3.2 x 10-11 4.0 x 10-8 27 / 50 A theoretical link between quantum mechanics and thermodynamics is_________? Soectroscopic analysis Statistical thermodynamics Electrchemistry Matrix mechanics 28 / 50 The common name of propane -1 3-dioic acid is____________________? Succinic acid Malonic acid Oxalic acid Fumaric acid 29 / 50 The Lewis acids are__________________? No such acids exist Octet is complete Electron rich Electron deficient 30 / 50 An acid with unpleasant smell_________________? acetic acid formic acid propionic acid butyric acid 31 / 50 Atoms of all the elements always contain in nucleus: Neutron Neutron and electron Proton Proton and neutron 32 / 50 Formaldehyde condenses with phenol in the presence of dilute H2SO4 to yield________________? Nylon 66 Bakelite Aniline formaldehyde plastic urotropine 33 / 50 In the production of wrought iron Mg Si and P are removed in the form of___________________? slag silicates carbonates oxides 34 / 50 Positive rays give flash on________________? ZnO ZnS AgNO3 plate AgCl plate 35 / 50 Nitrates of which pair of elements give different products on thermal decomposition ? Na K Li Ca Li Na Mg Ca 36 / 50 Which of the following technique is simple and efficient to purify a substance____________________? Sublimation Solvent extraction Crystallization Filtration 37 / 50 The earth absorb radiation in Visible range but emit radiation at the same rate in the: Gamma rays All of these Infrared Ultra voilet 38 / 50 Benzene gives mainly_________? Addition reaction All of these Halogenation Substitution reactions 39 / 50 Increase in atomic number is observed during_________________? Alpha emission Beta emission Radioactivity Both A & B 40 / 50 A reaction has values of ?H and ?S which are both positive. The reaction __________________? Is non-spontaneous Has an increasing free energy Is spontaneous Spontaneity is temperature dependent 41 / 50 An element has electronic conviguration 1s2 2s2 2p2. It belongs to__________________? Group IV-A Group VI-A Group VII-A Group II-A 42 / 50 The scientist who did not contribute in the construction of periodic table ? Al-Razi Dobereiner Moseley Democritus 43 / 50 Order of ease of halogenation in alkane is________________? I2>Cl2>Br2>F2 F2>Cl2>I2>Br2 Cl2>F2>Br2>I2 F2>Cl2>Br2>I2 44 / 50 With impurities like P and S the open hearth furnace is lined with ? Fe2O3 SiO2 CaO MgO FeO 45 / 50 CO2 is gas while SiO2 is solid at room temperature? CO2 is an independent molecule while SiO2 has network covalent structure carbon is non-metal while silicon is semi-metal Silicon has all sigma bonds CO2 forms multiple bond while silicon does not form multiple bonds 46 / 50 Which of the following is true in the case of Zn-Cu cell ? Zinc acts as an anode and copper as cathode All are correct E0red of copper electrode is less than that of zinc electrode The flow of electrons takes place from copper to zinc 47 / 50 Methyl alcohol is not used__________________? For denaturing of ethyl alcohol As a solvent As an antifreezing agent As a substitute for petrol 48 / 50 Which of the following statements is incorrect about halogens ? All the halogens have electronic conviguration ns2p5 All the halogens react with noble gases to form their halides They have high electron attinity and ionization energy All are non-metals 49 / 50 The atomic radii decreases by increasing atomic number in________________? Alkali metal Halogens Elements from Li to Ne Alkaline earth metal 50 / 50 Which is sold as fertilizer ___________________? Na2SiO3 Ca3(PO4)2 CaSiO3 MnSiO3 Provide Your Information Your score is The average score is 0% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevChemistry Quiz 14 Chemistry Quiz 16Next
