Quiz Medium 5 Categories Quizzes 0 Quiz Medium 5 1 / 25 RNA is involved in the synthesis of Proteins Carbohydrates Fats Nucleic acid 2 / 25 Inert pair effect is that When higher oxidation state is more stable than lower oxidation state When an element shows inertness in chemical combination When two s-electrons or outermost shell remain paired and do not participate in bonding When an electron pair is present on the atom of an element 3 / 25 The role of the mineral cryolite. Na3AIF5, in the Hall process for aluminum production is In the molten state, it is a solvent for alumina, Al203 It is a chemical reducing agent C It forms a slag to remove impurities It is the source of aluminum (the ore) 4 / 25 A minor constant is one whose amount in the sample is 0.01 to 1% 0.1 to 1% None of the above 1 to 10% 5 / 25 The only oxidation state of alkali metals in their compounds is 1 -1 2 6 / 25 Boric acid is added to glass, because it Makes the glass brittle Makes the glass opalescent Reduces the coefficient of expansions Increase refractive index of the glass 7 / 25 Lithium shows diagonal relationship with Beryllium Calcium Magnesium Sodium 8 / 25 Bischler Napieralski synthesis is used to prepare Pyrazine Isoquinoline Pyridine Quinoline 9 / 25 The pH of water is 7 at 25.C. If water is heated to 70°C. which of the following should be true? pH will remain constant Concentration of H+ will increase and OH- will remain same pH will increase pH will decrease 10 / 25 Which parametre of a chemical reaction will change with the use of a catalyst? ∆E, change in internal energy ∆A, change in Helmholtz free energy ∆S, change in entropy K. the rate constant ∆F, change in free energy 11 / 25 The layer containing petroleum oil & gas is Above that of water Below sand Between water and sand All of the above Below water 12 / 25 The process of identifying the component present in a sample is called Volumetric analysis Gravimetric analysis Quantitative analysis Qualitative analysis 13 / 25 Cytosine, a pyrimidine base, pairs with Adenine Guanine Any of these Thymine 14 / 25 What % if nickel is present in the major ore Pentlandite? 0.22 0.18 0.1 0.14 15 / 25 A pH of a neutral solution at 100°C when Kw = 1.0 x 10-12 is 2 6 12 7 16 / 25 Chromium is found in nature in the form of Oxides Silicates Sulphides Borates 17 / 25 Ionic reactions mainly take place in Gaseous state Non-aqueous solvents of low polarity Solid State Aqueous solutions and organic solvents of high polarity 18 / 25 The concentration required to give a signal equal to three times the standard deviation of the baseline (blank) is called Detection limit Sensitivity None of the above Signal to noise ratio 19 / 25 Which of the following technique is based on the absorption of light radiation Spectrophotometry NMR ESR All above Colorimetry 20 / 25 Which name is associated with the rules which help in predicting the polarisability of anion? Linus Pauling Fajan Slater Soddy 21 / 25 Which of the following has the tendency to form complexes? Na KOH Li Rb 22 / 25 Which of the following reactions are not shown by benzaldehyde Bankmann rearrangement Benzoin Condensation Perkin Reaction Cannizzaro Reaction 23 / 25 In the Lewis structure of H2SO4 molecule the total number of unshared electrons in valence shell of various atoms is 12 16 20 8 24 / 25 Which of the following is not adsorptive separation process? None of these Olex Penex Molex Parex 25 / 25 The reaction of benzene ring are mainly Nucleophilic addition Electrophonic substitution Free Radical substitution Nucleophilic substitution Your score is Share: Quiz Dad Previous post Quiz Medium 4 October 1, 2022 Next post Quiz Hard 1 October 1, 2022 You may also like Quiz Hard 5 1 October, 2022 Quiz Hard 4 1 October, 2022 Quiz Hard 3 1 October, 2022
