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 active mass of 5.6 litres of O2 at STP is

  

  

  

  

At 270C the ratio of root mean square velocities of ozone to oxygen is :

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

While phosphorus form PCl5, nitrogen does not form NCl5 because

  

  

  

  

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

  

  

  

  

pH of a buffer solution decreases by 0.02 units when 0.12 g of acetic acid is added to 250 ml of a buffer solution of acetic acid and Potassium acetate at 270C. The buffer capacity of the solution is

  

  

  

  

Which of the following is not correct

  

  

  

  

The correct trends in the hydrides from Bi to N is

  

  

  

  

The molecule having zero dipole moment is:

  

  

  

  

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

  

  

  

  

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

  

  

  

  

In the reaction AlCl3+Cl-→AlCl4-, AlCl3 is

  

  

  

  

The addition of HCl will not suppress the ionization of

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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 :

  

  

  

  

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

  

  

  

  

Which of the following reactions can produce aniline as main product

  

  

  

  

Which of the following compounds answer positively carbyl amine test? A) C6H5NHCH3 B) CH3-C6H6-NH2 C) C6H6-NH2 D) C6H6-NH (CH3)2

  

  

  

  

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

  

  

  

  

Which of the following pair of ions have same paramagnetic moment

  

  

  

  

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

  

  

  

  

138 g of ethyl alcohol is mixed with 72 g of water. The ratio of mole fraction of alcohol to water is

  

  

  

  

Gold number is used to show

  

  

  

  

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:

  

  

  

  

Order of boiling points

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Which of the following not obtained when methyl chloride and n-propyl chloride react with sodium in dry ether

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Which one of the following elements reduces NaOH to Na?

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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 :

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

In Freundlich adsorption isotherm, the intercept is equal to

  

  

  

  

Ultrapure elements are obtained in the following method of metal refining

  

  

  

  

A solution of concentration "C" g equiv/litre has a specific resistance R, The equivalent conductance of the solution is

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Which of the following pairs of ions are colourless ?

  

  

  

  

Ordinary glass is a combination of the following

  

  

  

  

The chemical formula of 'tear gas is :

  

  

  

  

Which of the following is an example of interstitial hydride

  

  

  

  

Carbogen to

  

  

  

  

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)

  

  

  

  

During electrolytic reduction of aluminia,the reaction at cathode is

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

The number of sigma and pi (π) bonds present in benzene respectively are :

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Which of the following converts acetic acid into acetyl chloride

  

  

  

  

Which of the following is not tetrahedral

  

  

  

  

'Natalite' is used as

  

  

  

  

The rate of the reaction at 400C is 5 units.The rate of same reaction at 800C is nearly(temperature coefficient)

  

  

  

  

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

  

  

  

  

The weakest acid among the following is

  

  

  

  

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

  

  

  

  

Observe the following statements :I.   Bleaching   powder   is   used   in   the preparation of chloroform.II.  Bleaching powder decomposes in the presence ofCoCl2 to liberate 02.III.Aqueous KHF2 is used in the preparation of fluorine.The correct combination 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.......

  

  

  

  

If H++OH-→H2O.ΔH=-57.3 KJ, then the heat of neutralization for complete neutralization of 1 mole H2SO4 by a base is

  

  

  

  

Which of the following is correct ?

  

  

  

  

Identify the correct decreasing order of the following with respect to altitude from atmosphere:I. Troposphere    II. Mesosphere  III. Thermosphere

  

  

  

  

Which of the following is not a peroxy acid

  

  

  

  

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

  

  

  

  

Which one of the following is used as an acid flux in metallurgy ?

  

  

  

  

Hybridisation of oxygen in diethyl ether is

  

  

  

  

The chemical entities present in thermosphere of the atmosphere

  

  

  

  

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

  

  

  

  

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 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

  

  

  

  

Alcohol manufactured from water gas is

  

  

  

  

Which of the following, compounds is the reactant in Rosenmund's reduction

  

  

  

  

Sodium is heated in air at 3000C to form X. X absorbs CO2 and forms Na2CO3 and Y. Which of the following is Y

  

  

  

  

In which of the following reactions the product is an ether

  

  

  

  

The energy of a photon is 3 x 10-12 ergs.What is its wavelength in nm ?( h = 6.62 x 10 -27ergs-s ; c = 3 x 10 10 cm/s )

  

  

  

  

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

  

  

  

  

The gas that is used for sterilizing water is

  

  

  

  

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

  

  

  

  

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)

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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