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

  

  

  

  

The weight in grams of a non-volatile solute (M.wt:60) to be dissolved in 90 g of water to produce a relative lowering of vapour pressure of 0.02 is

  

  

  

  

The conjugate base of HSO4- ion is:

  

  

  

  

Which of the following is not an air pollutant

  

  

  

  

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

  

  

  

  

∆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 formula of the product formed, when sodium thiosulphate solution is added to silver bromide is

  

  

  

  

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

  

  

  

  

The vapour pressure of water at 230C is 19.8 mm. 0.1 mole of glucose is dissolved in 178.2 g of water. What is the vapour pressure (in mm) of the resultant solution

  

  

  

  

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

  

  

  

  

The following is a reversible reaction

  

  

  

  

"Fluorosis" disease is caused due to the reaction of ________ with excess of fluoride in the body

  

  

  

  

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 heat of neutralization of strong acid and weak base is

  

  

  

  

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

  

  

  

  

Which of the following brings about dry bleaching

  

  

  

  

9.2 grams of N2O4(g) is taken one liter vessel and heated till the following equilibrium is reached N2O4 (g)⇔2NO2(g).At equilibrium 50% of N2O4(g) is dissociated.The value of Kc is

  

  

  

  

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

  

  

  

  

Which of the following reacts with ammoniacal cuprous chloride

  

  

  

  

Which of the following is not correct

  

  

  

  

5.85 gms of NaCl (Mol. wt. 58.5) is dissolved in water and the solution made up to 500ml; the molarity of the solution will be

  

  

  

  

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

  

  

  

  

Conjugate base of H2SO4 is

  

  

  

  

Method used for the concentration of tinstone ore is

  

  

  

  

Calculate ∆H0 for the reaction Na2O(s) + SO3 (g)→ Na2SO4(g) given the following1. Na(s) + H2O(l) →NaOH (s)+ 1/2 H2(g) ∆H0  = -146kJ2.Na2SO4(s) + H2O(l) →2NaOH(s) + SO3(g) ∆H0  = +418kJ3. 2Na2O(s) + 2H2(g) →4Na (s) + 2 H2O(l) ∆H0 = +259kJ

  

  

  

  

'Natalite' is used as

  

  

  

  

Exhausted permutit does not contain .... ion :

  

  

  

  

Identify 'acetaldoxime'

  

  

  

  

On adding a little phosphorous to silicon, we get a/an

  

  

  

  

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 :

  

  

  

  

Which of the following is correct

  

  

  

  

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

  

  

  

  

when acetaldehyde is heated with Fehling solution, a red precipitate is formed. Which of the following is that

  

  

  

  

The magnetic oxide of iron is

  

  

  

  

If a reaction obeys the following equation. K=2.303/t log10a/a-x, the order of the reaction will be

  

  

  

  

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

  

  

  

  

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 used for making optical instruments ?

  

  

  

  

75% of first order reaction is completed in 32 minutes 50% of the reaction would have been completed in

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Assertion(A): The molecularityof reaction is a whole number other than zero, but generally less than 3. Reason(R): The order of a reaction is always a whole number

  

  

  

  

The degree of dissociation of an acid HA in 0.1 M solution is 0.1%. Its dissociation constant is ;

  

  

  

  

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)

  

  

  

  

In nuclear reactor, heavy water is used as a :

  

  

  

  

Which of the following is the anhydride of HNO3

  

  

  

  

The weakest acid among the following 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.......

  

  

  

  

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

  

  

  

  

The molar capacity(Cp)of water at constant pressure is 75 J.K-1.mol-1.The increase in temperature (in K) of 100 g of water when 1 K.J. of heat is supplied to it is

  

  

  

  

Which one of the following sets correctly represent the increase in the paramagnetic property of the ions

  

  

  

  

Bauxite is a mineral for the extraction of :

  

  

  

  

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

  

  

  

  

The correct trends in the hydrides from Bi to N is

  

  

  

  

The chemicals and the reaction conditions required for the preparation of ethane are

  

  

  

  

Order of boiling points

  

  

  

  

Which of the following is a biodegradable polymer

  

  

  

  

 Which of the following is not correct

  

  

  

  

The nature of forces operating between the adsorbate and the adsorbent in the adsorption occurring at high temperature is

  

  

  

  

Which of the following reagents and conditions convert benzene to chlorobenzene

  

  

  

  

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

  

  

  

  

The experimental data for the reaction 2NO(g)+Cl2(g)→2NOCl(g) are given below Expt [Cl2] [NO] Initial rate 1 0.020 0.010 2.4x10-4 2 0.020 0.030 2.16x10-3 3 0.040 0.030 4.32x10-3 What is the order of the reaction

  

  

  

  

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

  

  

  

  

The earthy impurities present in the mineral are called

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Which one of the following compounds liberates CO2 from aqueous NaHCO3

  

  

  

  

The oxidation states of nitrogen in NH4NO3 is /are

  

  

  

  

28g of N2 and 6g of H2 were mixed initially .At equilibrium 17g of NH3 was formed.The weight of N2 and H2 at equilibrium are respectively

  

  

  

  

The atomic numbers of elements X, Y and Z are 19, 21 and 25 respectively. The number of electrons present in the M shell of these elements follow the order

  

  

  

  

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

  

  

  

  

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 :

  

  

  

  

Which of the following is not a peroxy acid

  

  

  

  

What are the metal ions present in carnallite ?

  

  

  

  

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 ?

  

  

  

  

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

  

  

  

  

Calorific value of producer gas is low because of

  

  

  

  

The reagent used in the preparation of aspirin from salicylic acid is

  

  

  

  

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?

  

  

  

  

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

  

  

  

  

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)

  

  

  

  

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

  

  

  

  

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

  

  

  

  

The correct structure of 4-bromo 3-methyl-but-1-ene:

  

  

  

  

Which of the following functional group shows +R effect

  

  

  

  

A gaseous mixture contains 56g of N2,44g of CO2 and 16g of CH4.The total pressure of th mixture is 720 mm Hg.The partial pressure of CH4 is:

  

  

  

  

Which of the following reagents can form a hydrazone with alkanone

  

  

  

  

If ΔE is the heat of reaction for C2H5OH(1)+3O2(g)→2CO2(g)+3H2O(l) at constant volume,the ΔH(Heat of reaction at constant pressure)at constant temperature is

  

  

  

  

The type of bonds present in sulphuric anhydride

  

  

  

  

Which one of the following reactions does not form gaseous product

  

  

  

  

The hydrolysis constant Kh of a salt of NaOH and a weak acid (HX) If the Ka of the acid is Ka=2x10-6

  

  

  

  

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

  

  

  

  

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

  

  

  

  

The method of separation of enantiomers from racemic mixture is known as

  

  

  

  

The Kc for the reaction A+B↔C is 4 and Kc for 2A+D↔C is 6. The value of Kc for C+D↔2B is

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Identify the reaction for which ΔH ≠ ΔE :

  

  

  

  

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

  

  

  

  

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