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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Calorific value of producer gas is low because of

  

  

  

  

The element that can exhibit highest number of oxidation states amongst the following:

  

  

  

  

A certain current liberated 0.504g of hydrogen in 2hrs. How many grams of copper can be librated by the same current flowing for the same time in a copper sulphate solution

  

  

  

  

Which among the following element does not liberate H2 gas on reaction with NaOH?

  

  

  

  

 Which of the following is not correct

  

  

  

  

Which of the following halide does not contain a lone pair of electrons on the central atom

  

  

  

  

In nuclear reactor, heavy water is used as a :

  

  

  

  

The molar concentrations of A,B and C at equilibrium for the reaction A+2B⇔3C are 2,3 and 4 moles/lit respectively. Its Kc is

  

  

  

  

Ultrapure elements are obtained in the following method of metal refining

  

  

  

  

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 ?

  

  

  

  

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

  

  

  

  

The gold numbers of three protective colloids A, B, and C are 0.05, 0.01 and 0.5 respectively. The decreasing order of their protective power is:

  

  

  

  

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

  

  

  

  

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

  

  

  

  

The number of oxygen atoms bonded to one phosphorus atom in P4O6 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

  

  

  

  

Three faradays of electricity are passed through molten Al2O3, aqueous solution of CuSO4 and molten NaCl taken in three different electrolytic cells. The amount of Al,Cu and Na deposited at the cathodes will be in the ratio of

  

  

  

  

Which of the following is not a peroxy acid

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Which of the following is correct

  

  

  

  

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)

  

  

  

  

Which of the following statements is correct

  

  

  

  

Liquid benzene burns in oxygen according to 2C6H6(l)+15O2 (g)→12CO2 (g)+6H2O(l) .How many litres of oxygen are required for complete combustion of 39 gms.Of liquid C6H6

  

  

  

  

Given that ∆Hf(H) = 218 k J / mol, express the H - H bond energy in k cal/mol

  

  

  

  

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

  

  

  

  

Bhopal gas tragedy of 1984 was caused by

  

  

  

  

3.42g of substance of molecular weight 342 is present in 250g of water.Molality of this solution is

  

  

  

  

Which of the following is obtained in carbyl amine reaction from aniline

  

  

  

  

Which pair of oxyacids of phosphorous contain ‘P - H' bonds

  

  

  

  

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

  

  

  

  

Assertion (A) : NaCl is less soluble in heavy water than in ordinary water,Reason (R) : Dielectric constant of ordinary water is more than that of heavy waterThe correct answer is

  

  

  

  

A moving electron has 4.55 x 10-25 joules of kinetic energy. The wavelength of the electron is (mass = 9.1 x 10-31 kg and h = 6.6 x 10-34 kg m2 sec-1)

  

  

  

  

90 grams of water and 230 grams of an organic liquid n mixing gives a solution in which the mole fraction of water in the resulting solution is 0.5 the molecular weight of the organic liquid is

  

  

  

  

The salt of phosphorous acid are called

  

  

  

  

Which of the following has the highest first IP

  

  

  

  

The conjugate acid of NH2- ion is:

  

  

  

  

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

  

  

  

  

A codon has a sequence of A and specifies a particular B that is to be incorporated into aC What areA, B, C

  

  

  

  

Hydrolysis of trichloro methane with aqueous KOH gives

  

  

  

  

Aqueous solution of an organic compound, 'A' on electrolysis liberates acetylene and CO2 at anode. 'A' is

  

  

  

  

Which of the following reagents and conditions convert benzene to chlorobenzene

  

  

  

  

Aniline is treated with NaNO2 and HCl at 00C,the product formed is:

  

  

  

  

At 270C the Kp value for the reaction PCl5(g)⇔PCl3(g)+Cl2(g).is 0.65.Its Kc is

  

  

  

  

PH of a solution produced when aqueous solution of PH 6 is mixed with an equal volume of an aqueous solution oh PH is about

  

  

  

  

If the bond length and dipole moment of a diatomic molecule are 1.25 A and 1.0D respectively,what is the percent ionic character of the bond

  

  

  

  

Which of the following functional group shows +R effect

  

  

  

  

The heat of formation of SO2(g) is -297.8 kJ mol-1.The enthalpy change in the decomposition of 1 mole SO2(g) to its constituent elements is

  

  

  

  

The most abundant group of lipids and animals is

  

  

  

  

The equilibrium constants for the reactions N2(g)+O2(g)⇔2NO(g) and NO(g)+1/2O2(g)⇔NO2(g) are K1 and K2 respectively. Then the equilibrium constant for the reaction N2(g)+2O2(g)⇔2NO2(g) is

  

  

  

  

The conjugate base of HSO4- ion is:

  

  

  

  

Which one of the following salts give an acidic solution in water

  

  

  

  

Meta-phosphoric acid is represented by

  

  

  

  

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

  

  

  

  

If a gas contains only three molecules that move with velocities of 100,200,500 ms-1.What is the rms velocity of that gas in ms-1

  

  

  

  

The half-lives of two radioactive nuclides A and B are 1 and 2 min respectively. Equal weights of A and B are taken separately and allowed to disintegrate for 4 min. What will be the ratio of weights of A and B disintegrated

  

  

  

  

When the same amount of zinc is treated with excess of H2SO4 and with excess NaOH, the ratio of the volume of H2 evolved 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

  

  

  

  

The following are some statements related to VA group hydrides,I . Reducing  property increases from NH3 to BiH3.II..Tendency to donate lone pair decreases from NH3 to BiH3III.Thermal stability of hydrides decreases from NH3 to BiH3.IV. Bond angle of hydrides decreases from NH3 to BiH3.The correct statements are

  

  

  

  

The heat of formation (ΔHf) of H2O(g) is -243 KJ.ΔE of it at temperature T is

  

  

  

  

Observe the following statements regarding purification of bauxiteI. During Hall's process, silica is removed as Si (vapour)II. Bauxite ore contaminated with Fe2O3 is purified in Baeyer's processIII. During Serpeck's process, AlN is formedThe correct answer is

  

  

  

  

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

  

  

  

  

In the Born-Haber cycle of the given reaction Na(s) + (1/2)Cl2(g) →NaCl(s)the number of endothermic and exothermic stages respectively are

  

  

  

  

Which of the following is a biodegradable polymer

  

  

  

  

The IUPAC name of an unsymmetrical ether with the molecular formula C4H10O:

  

  

  

  

Which one of the following compounds liberates CO2 from aqueous NaHCO3

  

  

  

  

Which of the following is an endothermic reaction ?

  

  

  

  

Aniline when heated with NaNO2 and HCl at 0.50C the product formed is:

  

  

  

  

The equilibrium constant Kp for the reaction 2SO2+O2⇔2SO3 is 2.5 atm-1.What would be the partial pressure of O2 at equilibrium. If the equilibrium partial pressures of SO2 and SO3 are equal

  

  

  

  

A certain sample of gas has a volume of 0.2 litres measured at 1 atm. pressure and 00 C. At the same pressure but at 273 0c. Its volume will be

  

  

  

  

Which one of the following compounds in aqueous solution gives a white precipitate with perichloric acid ?

  

  

  

  

The decreasing order of bond dissociation  energies of   C-C , C-H and H-H i bond is

  

  

  

  

In aqueous solutions H2O2 oxidises H2S to

  

  

  

  

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

  

  

  

  

The charge required to reduce 1 mole Cr2O7-2 to Cr+3 ions is

  

  

  

  

Which one of the following pairs of reactants does not form oxygen when theyreact with each other

  

  

  

  

Which of the following is not a lipids

  

  

  

  

How many litres of oxygen (at STP) are required for complete combustion of 39 g of liquid benzene?(Atomic weights: C = 12, O = 16, H = 1)

  

  

  

  

Which of the following reacts with ethanol to form chloroform

  

  

  

  

The time for half life of a first order reaction is 1 hour. What is the time taken for 87.5% completion of the reaction

  

  

  

  

One Faraday of current was passed through the electric cells placed in series containing fused electrolytes with Ag+2,Ni2+,Cr3+ ions. The amount of Ag(at.wt=108), Ni(at.wt=59) and Cr(at.wt=52) deposited will be

  

  

  

  

Oxidation number of oxygen in OF2 is

  

  

  

  

Identify 'acetaldoxime'

  

  

  

  

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

  

  

  

  

Which one of the following statements is correct

  

  

  

  

Assertion (A): the molecularity of reaction is a whole number other than zero , but generally less than 3 Reactions (R): the order of a reaction is always whole number

  

  

  

  

The magnetic oxide of iron is

  

  

  

  

Ethylene reacted with bromine in CCl4 to form X. When X is reacted with alcoholic KOH, Y is formed. X and Y are respectively :

  

  

  

  

Which of the following converts acetic acid into acetyl chloride

  

  

  

  

Which of the following brings about dry bleaching

  

  

  

  

The numbers of unit cells present in 5.85mg of NaCl crystal are

  

  

  

  

Which of the following is not tetrahedral

  

  

  

  

On passing a current through a KCl solution, 19 5 g. of potassium is deposited. If the same quantity of electricity is passed through a solution of aluminium chloride, the amount of aluminium deposited is:

  

  

  

  

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

  

  

  

  

The order of pH of 0.200 M solutions of NH4NO3, NaNO3 and Na2CO3 is

  

  

  

  

A and B are ideal gases. The molecular weights of A and B are in the ratio of 1 : 4. The pressure of a gas mixture containing equal weights of A and B is P atm. What is the partial pressure (in atm) of B in the mixture ?

  

  

  

  

CH3COOH ----LiAlH4--->  AA + CH3COOH ---H3O+ ----->  B + H2OIn the above reactions 'A' and 'B' respectively are

  

  

  

  

Three faradays of electricity was passed through an aqueous solution of iron(II) bromide.The weight of iron metal(at.wt=56) deposited at the cathode is(in grams):

  

  

  

  

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