Eamcet - Chemistry Test

Test Instructions :

1. The Test is 1hr duration.
2. The Test Paper consists of 30 questions. The maximum marks are 30.
3. All the questions are multiple choice question type with three options for each question.
4. Out of the three options given for each question, only one option is the correct answer.
5. Each question is allotted 1 mark for each correct response.
6. 0.25 will be deducted for incorrect response of each question.
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A codon has a sequence of A and specifies a particular B that is to be incorporated into aC What areA, B, C





The heat of formation of HI from the equation H2+I2→2HI,ΔH=+52 KJ is





A radioactive substance 88X228 (IIA) emits 3α and 3β particles to form "Y". To which group of long form of the periodic table does "Y" belong





Which one of the following reactions does not form gaseous product





Among  the following, which is water insoluble





An organic compound X on treatment with pyridium dichromate in dichloromethane gives compound Y.Compound Y reacts with I2 and alkali to form idoform.The compound X is





The rate equation for the reaction A+2B→products is rate=K[A][B]2. If the volume of the vessel is decreased to half of the initial volume the reaction rate bears the following relation to the original rate





The solubility of AgCl in NaCl solution is less than that in pure water,because





n moles of an ideal gas at temperature T (in kelvin) occupy VL of volume, exerting a pressure of P atmospheres.What is the concentration (in mol / L)?





Active mass of 56 g of N2 contained in 2 ltr.Flask is





Resonance in benzene is accompanied by delocalization of π –electrons. Each π electron is attached with





Which of the following is not a conjugate acid-base pair





 Which of the following is not correct





A metal nitride contains 28% nitrogen by weight. The molecular formula of metal nitride is M3N2 What is the atomic weight of metal





Which of the following is not tetrahedral





Hydrolysis of trichloro methane with aqueous KOH gives





The standard reduction electrode potential values of the elements A, B and C are +0.68V, -2.5V and -0.5V respectively. The order of their reducing power is





A certain mass of a gas occupies a volume of 2 L at STP. To what temperature the gas must be heated to double its volume, keeping the pressure constant





Which of the following statements is NOT correct?





The addition of HCl will not suppress the ionization of





The electrolytic conductance of 0.01 M solution of acetic acid is 0.000163 Scm-1 at 298k. The % of dissociation of acetic acid at 298K.Given Am0 of acetic acid =390.7 Scm-2/mole at 298K.





The wavelengths of electron waves in two orbits is 3 : 5. The ratio of kinetic energy of electrons will be





Gold number is used to show





Which of the following alkali metals has the greatest tendency for the half reaction;  M(g) →M+(aq) + e





For a reaction A+B→ products,the rate of the reaction was doubled.When the concentration of A was doubled.When the concentration of A and B were doubled.The order of the reaction with respect to A and B are





If in a 100 mL of an aqueous HC1 of pH 1.00, 900 mL of more distilled water is added, the pH of the resultant solution will be :





Exhausted permutit does not contain .... ion :





What is the correct order of spin only magnetic moment (in BM) of Mn2+, Cr2+ and V2+ ?





The rate constant of a first order reaction at 27°C is 10-3 min-1. The temperature coefficient of this reaction is 2. What is the rate constant (in min-1) at 17°C for this reaction ?





Oxide of nitrogen which gives reddish brown colour when exposed to air is





Which of the following brings about dry bleaching





One mole of alkene X on ozonolysis gave one mole of acetaldehyde and one mole of acetone. The IUPAC name of X is





The concentration of oxalic acid is 'x'mol L-1. 40 mL of this solution reacts with 16 mL of 0.05 M acidified KMn04. What is the pH  of 'x' M oxalic acid solution ? (Assume that oxalic acid dissociates completely)





Study the following table: Buffer solution Volume(in ml) of 0.M weak Volume(in ml) of 0.1 M sodium salt of weak acid I 4.0 4.0 II 4.0 40.0 III 40.0 4.0 IV 0.1 10.0 Which of the two sets of buffer solutions have least pH?





The chemical formula of 'tear gas is :





In Freundlich adsorption isotherm, the intercept is equal to





Identify the reaction for which ΔH ≠ ΔE :





The value of Kp for the reaction 2H2S(g)⇔2H2(g)+S2(g) is 1.2 x 10-2 at 10650C.The value of KC for the reaction is





One mole of A and 2 moles of B are allowed to react in a one lit flask. What is the value of Kc if at equilibrium,0.4 moles of C is formed in the reaction A+2B⇔C+2D





Which of the following set of variables give a straight line with a negative slope when plotted ?(P - vapour pressure, T = Temperature in K)





Which of the following compounds when heated with CO at 150"C and 500 atm pressure in presence of BF3 forms ethyl propionate ?





What is the hybridization state of the central atom in the conjugate acid of NH3?





During electrolytic reduction of aluminia,the reaction at cathode is





Which of the following is not correct





Which of the following reagents can form a hydrazone with alkanone





The Chemical reaction between NaS2O3 and I2 leads to the formation of





Bauxite is boiled with aqueous NaOH solution. Sodium meta aluminate solution is formed. This part in the metallurgy of aluminium is called





Alcohol manufactured from water gas is





The difference in ΔH and ΔE for the combustion of methane at 270C would be





0.84 g of metal carbonate reacts exactly with 40 mL of N/2 H2S04. The equivalent weight of the metal carbonate is :





Calculate the emf of the cell   Cu (s) | Cu2+ (aq) || Ag+ (aq) | Ag (s)  GivenEoCu2+/Cu  = +0.34V ,  EoAg+/Ag  =0.80 V





The molecule having zero dipole moment is:





The conjugate acid of NH2- ion is:





An endothermic reaction A→B has an activation energy 15 kCal/mole and energy of the reaction is 5 kCal/mole. The activation energy of the reaction B→A is





The type of bonds present in sulphuric anhydride





If 20 mL of 0.4 N NaOH sol ution completely neutralised 40 mL of a dibasic acid, the molarity of the acid solution is :





The oxidation states of nitrogen in NH4NO3 is /are





When compound X is oxidised by acidified potassium dichromate, compound Y is formed. Compound Y on reduction with LiAlH4 gives X. X and Y respectively are :





The order of decrease in atomic radii for Be;Na;Mg is





Which of the following reacts with benzene in presence of anhydrous aluminum chloride and forms acetophenone ?





For a given reaction which one is higher than the rest among the following





x grams of calcium carbonate was completely burnt in air. The weight of the solid residue formed is 28g. What is the value of x (in grams)





In a first order reaction,50 minutes time is taken for the completion of 93.75% of a reaction. Half life of the reaction is





The flux used in the extraction of iron from Haematite in the blast furnace is





Assertion (A) : K, Rb and Cs form superoxides.Reason (R) ;     The stability of the superoxides increase from 'K' to 'Cs' dueto decrease in lattice energy. The correct answer is





X liter of carbon monoxide is present at STP. It is completely oxidized to CO2. The volume of CO2 formed is 11.207 litres. What is the value of X in litres





Among the following compounds which have more than one type of hybridization for carbon atom 1) CH3CH2CH2CH3 2) CH3CH= CHCH3 3) CH2= CH-CH=CH2 4) H-C=C-H





Which of the following contains a coordinate covalent bond ?





Helium mixed with oxygen is used in the treatment of:





Which one of the following compounds forms a quaternary salt on reacting with excess methyl iodide ?





Which of the following is added to chloroform to slow down its aerial oxidation in presence of light ?





Average C-H bond energy is 416 kJ. mol-1. Which of the following is correct ?





The rate of gaseous reaction is give by k[A][B].If the volume of reaction vessel is reduced to 1/4 of initial volume the reaction rate relative to the original rate is





In the Dewar's method of separation of noble gases, the mixture of noble gases is kept in contact with coconut charcoal at 173K. Which one of the following gaseous mixtures is not adsorbed on to the charcoal ?





Hydrolysis of NCI3 gives NH3 and X. Which of the following is X ?





In 0.01 M solution,HCN is 0.01% ionized. Its dissociation constant is





Equivalent conductance at infinite dilution,λ0 of NH4Cl,NaOH and NaCl are 128.0,217.8 and 109.9 ohm-1cm2eq-1 respectively. The equivalent conductance of 0.01N NH4OH is 9.30 ohm-1cm2eq-1,then the degree of ionization of NH4OH at this temperature would be(approximately)





 Which of the following is a pair of functional isomers





When a sample of gas expands from 4.0L to 12.0L against a constant pressure of 0.30 atm, the work involved is (1L ATM=101.35 J)





The number of pπ - dπ 'pi' bonds present in XeO3and XeO4molecules, respectively are





Which of the following is correct





The value of Kc for the reaction N2+3H2 ⇔2NH3 depends on





Nitro benzene on reduction with zinc and NH4CI gives





In nuclear reactor, heavy water is used as a :





'Natalite' is used as





All the three oxygen atoms of ozone are utilized in the oxidation of





A molecule (X ) has (i) four sigma bonds formed by the overlap of sp2 and s orbitals (ii) one sigma bond formed by sp2 and sp2 orbitals and (iii) one π bond formed by px and pz orbitals. Which of the following is X ?





The ratio of radii of first orbits of H, He+ and Li+2 i





The solubility of LiOH in a solution of pH = 8 = is Ksp = 1.8 x 10-12





Chloroethane reacts with Y to form NaCl and Z. One mole of Z reacts with two moles of HI to form water and iodo ethane. Which of the following is Y





What is the temperature at which the kinetic energy of 0.3 moles of Helium is equal to the kinetic energy of 0.4 moles of Argon at 400 K ?





Al3+ion has a lower ionic radius than Mg2+ ion because :





1.5 g of CdCl2 was found to contain 0.9 g of Cd. Calculate the Atomic weight of Cd





Which of the following is the anhydride of HNO3





Which of the following pair of transition metal ions, have the same calculated values of magnetic moment





Observe the following statements :I.    The physical and chemical properties of elements are periodic functions of their electronic configuration.II.    Electronegativity of fluorine is less than the electronegativity of chlorine.III.   Electropositive nature decreases from top to bottom in a group.The correct answer is :





A sample of 100ml water required 0.294mg of K2Cr2O7(mol.wt=294)for oxidizing dissolved organic compounds in it. The C.O.D of water sample is





Which one of the following is used in the preparation of styrene?





Identify the correct order in which the covalent radius of the following elements increasesI. TiII. CaIII. Sc





For the estimation of sulphur by Carius method, the organic compound is heated in Carius tube with





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