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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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

  

  

  

  

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

  

  

  

  

In the extraction of iron from haematite,the charge used is haematite,coke and lime stone in the following weight ratio

  

  

  

  

Which of the following biomolecules acts as specific catalysts in biological reaction

  

  

  

  

Which of the following converts acetic acid into acetyl chloride

  

  

  

  

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

  

  

  

  

In which of the following cases, the reaction is spontaneous at all temperatures

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Hybridisation of oxygen in diethyl ether is

  

  

  

  

Which of the following has S---S bond ?

  

  

  

  

Which of the following is not tetrahedral

  

  

  

  

The pH of a solution of H2O2 is 6.0, Some chlorine gas is bubbled into this solution. Which of the following is correct

  

  

  

  

The conjugate acid of NH2- ion is:

  

  

  

  

Which one of the following is a secondary alcohol ?

  

  

  

  

Which of the following is not correct

  

  

  

  

Among  the following, which is water insoluble

  

  

  

  

Which one of the following noble gases is used in miner's cap lamps

  

  

  

  

Increasing the conc. of the reactant by 27 times, the rate increases by 3 times. What is the order of the reaction?

  

  

  

  

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

  

  

  

  

Anhydrous Magnesium chloride can be prepared by heating MgCl26H2O

  

  

  

  

The equilibrium constant for the reactionSO2(g) + (1/2) O2(g) <====> SO3(g) is  5 x 10-2 atm  The equilibrium constant of the reaction2SO3(g)  <====> 2SO2(g) + O2(g) would be

  

  

  

  

A 0.2 molal aqueous solution of a weak acid (HX) is 20 percent ionized. The freezing point of this solution is (Given Kf = 1.860C kg mol-1 for water)

  

  

  

  

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

  

  

  

  

What is the time (in sec) required for depositing all the silver present in 125mL of 1 M AgN03 solution by passing a current of 241.25 A ? (1 F = 96500 coulombs)

  

  

  

  

The bonds in K4Fe(CN)6 are:

  

  

  

  

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

  

  

  

  

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 molecular formula of potash alum is :

  

  

  

  

In the hardening stage of plaster of paris, the compound formed is :

  

  

  

  

 Fluorine reacts with dilute NaOH and forms a gaseous product A. The bond angle in the molecule of A is

  

  

  

  

The half-life period of a radioactive element is 120 days. After 480 days 4.0 gm of the element will be reduced to (.....) gms.

  

  

  

  

......of a reaction cannot be determined experimentally:

  

  

  

  

For the reversible reaction C2H4+H2↔C2H6 the equilibrium constant can be expressed in units of

  

  

  

  

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

  

  

  

  

Which one of the following reactions does not form gaseous product

  

  

  

  

Which of the following is not correct

  

  

  

  

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

  

  

  

  

Conjugate base of H2SO4 is

  

  

  

  

What are the metal ions present in carnallite ?

  

  

  

  

Which of the following is correct ?

  

  

  

  

The transition temp.at which rhombic sulphur becomes monoclinic sulphur is

  

  

  

  

Identify the reaction for which ΔH ≠ ΔE :

  

  

  

  

Which of the following reacts with ethanol to form chloroform

  

  

  

  

∆x is given by ∆x=(Hydrogen energy-Lattice energy). For a salt ∆x is found to be 500 kcal mol-1.Then on increasing the temperature, its solubility in water

  

  

  

  

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

  

  

  

  

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 ?

  

  

  

  

Ethyl chloride reacts with sodium ethoxide to form a compound A. Which of the following reactions also yields A ?

  

  

  

  

Cuprous ion is colourless while cupric ion is coloured because :

  

  

  

  

Which of the following is not correct

  

  

  

  

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

  

  

  

  

List -I List-II (A) Flespar (I) [Ag3SbS3] (B) Asbestos (II) Al2O3 . H2O (C) Pyrargyrite (III) MgSO4 . H2O (D) Diaspore (IV) KAlSi3O3 (V) CaMg3(SiO3)4

  

  

  

  

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

  

  

  

  

3-hydroxybutanal is formed when (X) reacts with (Y) in dilute (Z) solution. Whatare X, Y and Z

  

  

  

  

Dipole moment of HC1 = 1.03 D, HI = 0.38 D. Bond length of HC1 = 1.3 and HI = 1.6A .The ratio of fraction of an electric charge, δ, existing on each atom in HC1 and HI is

  

  

  

  

In the long form of periodic table, the elements having lowest ionisation potential are present in :

  

  

  

  

Molar conductivity of a solution 1.26 x 102Ω-1cm2mol-1 ,its molarity is 0.01.its specific conductivity will be

  

  

  

  

The correct order of reducing abilities of hydrides of V group elements is

  

  

  

  

Which of the following reacts with ammoniacal cuprous chloride

  

  

  

  

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

  

  

  

  

A mixture of sodium oxide and calcium oxide are dissolved in water,and saturated with excess carbon dioxide gas.The resulting solution is.....It contains.......

  

  

  

  

CFCl3 is responsible for the decomposition of ozone to oxygen. Which of the following reacts with ozone to form oxygen ?

  

  

  

  

Which of the following is not correct regarding the properties of ionic compounds ?

  

  

  

  

Which one of the following statements is correct

  

  

  

  

The standard reduction potentials of Zn2- | Zn, Cu2+| Cu and Ag+| Cu and Ag+| Ag are respectively -0.76, 0.34 and 0.8 V. The following cells were constructed :1) Zn | Zn 2+||Cu 2+| Cu2) Zn | Zn 2+||Ag +| Ag3) Cu | Cu 2+||Ag +| Agwhat is the correct order of Eocell of these cells?

  

  

  

  

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 catalyst increases the rate of reaction because it :

  

  

  

  

Zn(s)+Cu+2(ag)→Cu(s)+Zn+2(ag)Given that ΔfG0 for Cu+2(ag) and Zn+2(ag) are +65.0 K.J.mol-1 and -147.2 K.J.mol-1 respectively then the standard Gibbs energy change for the above reaction is

  

  

  

  

which of the following is not correcr?

  

  

  

  

The oxidation states of nitrogen in NH4NO3 is /are

  

  

  

  

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

  

  

  

  

The r.m.s. velocity of an ideal gas at 300 K is 12240 cm/sec. What is the most probable velocity at that temperature?

  

  

  

  

The value of Kp for the reaction 2H2S(g) ⇔ 2H2(g) + S2(g) is 1.2X10-2 at 10650C.The value of KC for the reaction

  

  

  

  

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.

  

  

  

  

Which of the following reagents and conditions convert benzene to chlorobenzene

  

  

  

  

The chemical formula of 'tear gas is :

  

  

  

  

Which of the following reactions can produce aniline as main product

  

  

  

  

The half-life period of a radioactive substance is 150 days. Starting with an initial quantity of 1 mg of the substance the fraction of that has disintegrated in 600 days is

  

  

  

  

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

  

  

  

  

Which of the following statements is correct

  

  

  

  

The metal used for the de-bromination reaction of 1, 2 dibromoethane

  

  

  

  

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

  

  

  

  

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 of the following is an example of interstitial hydride

  

  

  

  

How many electrons are present in the M shell of an atom of an clement with atomicnumber 24 (Z = 24) ?

  

  

  

  

One mole of fluorine is reacted with two moles of hot concentrated KOH. The products formed are KF, H2O and O2. The molar ratio of KF, H2O and O2 respectively is

  

  

  

  

Which of the following is used in the preparation of generated water (soda)

  

  

  

  

The amount of electricity that can deposit 108gm of silver from AgNO3 solution is

  

  

  

  

Hydrolysis of trichloro methane with aqueous KOH gives

  

  

  

  

Assertion (A) : A current of 96.5 A is passed into aqueous AgNO3 solution for 100 s. The weight of silver deposited is 10.8 g (At. wt. of Ag = 108)Reason (R) : The mass of a substance deposited during the electrolysis of an electrolyte is inversely proportional to the quantity of electricity passing through the electrolyte.The correct answer is :

  

  

  

  

In Freundlich adsorption isotherm, the intercept is equal to

  

  

  

  

Electrolysis of X gives Y at anode. Vacuum distillation of Y gives H2O2. The number of peroxy (O-O) bonds present in X and Y respectively are :

  

  

  

  

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

  

  

  

  

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 ?

  

  

  

  

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

  

  

  

  

1 mole of PCl5 is heated with 0.2 mole of chlorine in a one litre vessel till equilibrium is established. At equilibrium if 0.8 mole of chlorine in the vessel, the value of equilibrium constant for the dissociation of PCl5 is (in moles-lit-1)

  

  

  

  

The value of Kp for the reaction 2AB(g)⇔2A(g)+B2(g) is 1.2x10-2 at 1065oC.The value of Kc for this reaction is

  

  

  

  

The molar ionic conductivities of NH4+ and OH- at infinite dilution are 72 and 198 ohm-1cm2mol-1 respectively.The molar conductance of a centinormal NH4OH solution at the same temperature is found to be 9 ohm-1cm2mol-1,The percentage dissociation of NH4OH at this concentration will be

  

  

  

  

In which of the following reactions, the concentration of product is higher than the concentration of reactant at equilibrium (K=equilibrium constant)

  

  

  

  

Electrons with a kinetic energy of 6.023 x 104 J/mol are evolved from a surface of a metal, when it is exposed to radiation of wavelength of 600 nm, The minimum amount of energy required to remove an electron from the metal atom is

  

  

  

  

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