Quiz Hard 3 Categories Quizzes 0 Quiz Hard 3 1 / 30 Which of the following reagents can he used to prepare bromoethnne from ethanol? 1.Conc Aqueous KBr 2.Dilute hydrobromic acid 3. Phosphoric acid and potasium bromaid 4. Red phosphorus and bromine 2,3 only 3,4 only 1,2,3 only 1,2 and 4 only 2 / 30 The spin quantum number (S) for proton 1 3/2. 1/2. 3 / 30 Sulphur can exist in Two phase Three Phase Four Phase One phase 4 / 30 which of the following chloride is the most reacvtive towards uni molecular nucleophilic subsitution reaction t-butyl chloride n- propyl chloride Benzyl Chloride iso-butyl chloride 5 / 30 Which of the following radiation has valence electron transitions? Infrared Gamma rays Microwave X-rays Visible 6 / 30 The electronegativity of the follow, elements increases in the order F >CI >O> S Cl > F>O> s F >O> CI >S S > Cl >O>F 7 / 30 Carbon and hydrogen are estimated by None of the above Kjeldhal's method Liebig's method Carries method Dumas method 8 / 30 The law of triads is applicable to Litium, beryllium, boron flourine, chlorine, bromine sodium, potassium, rubidum cholrine,bromine,iodine 9 / 30 The following mechanism has proposed for a reaction…. 2A+ B------D+E, A+B----C+D(slow),A+C----E(fast) r = k|A| |B| r = k|A| |c| r = k|A|2 |B| r = k |A|2 10 / 30 Which of the following will have the highest boiling point at one atmosphere? 0.1 M solution of common salt 0.1 M solution of glucose 0.1 M solution of KC1 0.1 M solution of BaCl2 11 / 30 Which of the following is an azo dye? Paraosaniline Ertythrocin Rhodamine B Congo red 12 / 30 Which of the spectrum arises when an electron jumps from one energy level to another? Vibrational Nuclear Rotational Electronics 13 / 30 The electrophile in the sulphonation of benzene is SO3H SO2 SO3 HSO4 14 / 30 which of the following is typical element? La+ Na N F 15 / 30 Among the following statements on the nitration of aromatic compounds, the false one is Nitration is an electrophilic substitution reaction The rate of nitration of benzene is almost the same an that of hexadeutero-benzene The rate of nitration of toluene is greater than that of benzene The rate of nitration of benzene is greater than that of hexadeutero benzene 16 / 30 The difference between the incident and scattered frequencies in the Raman spectrum in called the Anti-Stoke's law P-branch Stokes law Raman frequency 17 / 30 Which of the following elements has the highest third ionization energy? silicon Aluminum Sodium Magnesium 18 / 30 Which one of the following periodic groups consists entirely of metals? IIA o IIIA VIIA 19 / 30 The gold numbere of Home hydrophilic substances are Egg albumen 0.08 -- 0.10 Gelatin 0.005 - 0.01 Gum Arabic 0.10--0.15 Soluble starch 10 - 15 20 / 30 The number of degrees of freedom at the triple point for the water system is one two three zero 21 / 30 Greatsst energy la associated Meth which radiations visible ultraviolet x-rays infrared 22 / 30 An element having low IE and low EA 0 likely to belong to Group VIII Group IB Group VIM Group IA 23 / 30 Which of the following does not represent Lewis base? NaOH NaH PCl3 NanH2 Pyridine 24 / 30 The maximum degree of freedom for a pure substance under equilibrium conditions is 1 3 2 Zero 25 / 30 The tyndall effect is not observed in emulsion suspension true solutions colloidal solutions 26 / 30 Conjugation of chromophore Shifts absorptionto shorter wavelength Deepens the colour All of these Lightens the colour 27 / 30 Which of the following bases have high pka value? Pyrrole Ammonia Pyridine Methylamine 28 / 30 Which of the following protective colloid? Oil-in-water emulsion all these Silica gel Gelatin 29 / 30 Which one of the following is natural polymer Starch Neoprene Nylon-6 Buna-S, SBR 30 / 30 Which of the following does not have a D-unsaturated carbonyl group? Testosterone Androsterone Progesterone Oestmne Your score is Share: Quiz Dad Previous post Quiz Hard 2 October 1, 2022 Next post Quiz Hard 4 October 1, 2022 You may also like Quiz Hard 5 1 October, 2022 Quiz Hard 4 1 October, 2022 Quiz Hard 2 1 October, 2022
