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

  

  

  

  

How many 'ml' of perhydrol is required to produce sufficient oxygen which can be used to completely convert 2 lit of SO2 gas to SO3 gas

  

  

  

  

CCl3COCH3+Ca(OH)2→X+Y. Here X and Y are

  

  

  

  

The number of structural alcoholic isomers for C4H10O is

  

  

  

  

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

  

  

  

  

Ordinary glass is a combination of the following

  

  

  

  

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

  

  

  

  

What are the metal ions present in carnallite ?

  

  

  

  

Assertion (A) : Equal moles of different substances contain same number of constituent particles.Reason (R) : Equal weights of different substances contain the same number of constituent particles.The correct answer is

  

  

  

  

Which of the following is not a peroxy acid

  

  

  

  

List-I List-II List-III CH3COONa Alc.KOH Ethylene CHCl2-CHCl2 H2O Acetylene C2H5MgI NaOH+CaO Methane CH3-CH2Cl Zn dust Ethane The correct match is

  

  

  

  

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

  

  

  

  

Which of the following is an endothermic reaction ?

  

  

  

  

Which one of the following functional groups undergoes hydrolysis with alkali to yield an acid group

  

  

  

  

In the extraction of copper, the slag formed in the blast furnace

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Order of boiling points

  

  

  

  

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

  

  

  

  

Helium mixed with oxygen is used in the treatment of:

  

  

  

  

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:

  

  

  

  

In the reaction AlCl3+Cl-→[AlCl4]-,AlCl3 acts as

  

  

  

  

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

  

  

  

  

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 earthy impurities present in the mineral are called

  

  

  

  

At 270C, 500 mL of helium diffuses in 30 minutes. What is the time (in hours) taken for 1000 mL of SO2 to diffuse under same experimental conditions ?

  

  

  

  

A mixture contains 10 g of oxygen, 28g of nitrogen and 8g of CH4.Total pressure of mixture is 740mm.What is the partial pressure of nitrogen in mm

  

  

  

  

One atom of 3919K contains:

  

  

  

  

Which of the following is not an air pollutant

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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)?

  

  

  

  

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 of the following statements is NOT correct?

  

  

  

  

Hydrolysis of sucrose with dilute aqueous sulphuric acid yields

  

  

  

  

The two sulphur atoms in Na2S2O3 have

  

  

  

  

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?

  

  

  

  

Nitro benzene on reduction with zinc and NH4CI gives

  

  

  

  

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

  

  

  

  

Solubility product of Ba(OH)2 and Al(OH)3 are 1.8x10-10 and 2.4x10-20 respectively.If both Al3+ and Ba+2 ions are present is a solution,which one will be precipated on addition of Ammonium hydroxide solution

  

  

  

  

Which of the following statements is correct

  

  

  

  

HCl+H2O?H3O++Cl- A Conjugate base of HCl is Cl- B Conjugate base of H3O+ is H2O C Conjugateacid base pair is HCl and H3O+ D Conjugateacid base pair is Cl- and H2O

  

  

  

  

The number of π bonds in the product formed by passing acetylene through dil.H2SO4 containing mercuric sulphate is:

  

  

  

  

If a solid is dispersed in a liquid the colloid is called

  

  

  

  

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

  

  

  

  

A system absorbs 10kJ of heat and does 4kJ of work. The internal energy of the system

  

  

  

  

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

  

  

  

  

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

  

  

  

  

When ethyl alcohol reacts with bromine in the presence of alkali the compound formed

  

  

  

  

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

  

  

  

  

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):

  

  

  

  

 Which of the following is a pair of functional isomers

  

  

  

  

A mixture of Boran trichloride and hydrogen is subjected to silent electric discharge to form ’A’ and HCl. ’A’ is mixed with NH3 and heated to 2000 C to form B. The formula of B is

  

  

  

  

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

  

  

  

  

In the extraction of sodium by Down's process, cathode and anode are respectively:

  

  

  

  

The quantum number which explains the line spectra observed as doublets in case of hydrogen and alkali metals and doublets and triplets in case of alkaline earth metals is

  

  

  

  

Which of the following is an example of interstitial hydride

  

  

  

  

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

  

  

  

  

For a reversible reaction, if the concentrations of the reactants are doubled, then the equilibrium constant value

  

  

  

  

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

  

  

  

  

The magnetic oxide of iron is

  

  

  

  

Assertion (A) : A catalyst increases the rate of a reaction.Reason (R) : In presence of a catalyst, the activation energy of the reaction increases. The correct answer is

  

  

  

  

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

  

  

  

  

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 :

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Which of the following is a linear molecule

  

  

  

  

An electron is moving in Bohr's fourth orbit. Its de-Broglie wave length is X. What is the circumference of the fourth orbit

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

What is the quantity of electricity (in Coulombs) required to deposit all the silverfrom 250 mL of 1 M AgNO3 solution

  

  

  

  

In aqueous solutions H2O2 oxidises H2S to

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

The   IUPAC    name    of   the    compound(CH3)2CH-CH=CH-CHOH-CH3 is

  

  

  

  

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)

  

  

  

  

Which of the following is the anhydride of HNO3

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Which of the following reactions can produce aniline as main product

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

When X amperes of current is passed through molten AlCl3 for 96.5 second,0.09g of alumunium is deposited.What is the value of X

  

  

  

  

While phosphorus form PCl5, nitrogen does not form NCl5 because

  

  

  

  

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

  

  

  

  

Dry distillation of calcium acetate and calcium formate forms:

  

  

  

  

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

  

  

  

  

Cuprous ion is colourless while cupric ion is coloured because :

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Hydrolysis of trichloro methane with aqueous KOH gives

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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 :

  

  

  

  

Ethylene reacts with Br2 in CCl4 to from X. When X is reacted with alcoholic KOH. Y is formed. Here X and Y are

  

  

  

  

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

  

  

  

  

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