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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In the reaction BCl3+PH3→[Cl3B←PH3] the lewis base is

  

  

  

  

Which of the following is not correct

  

  

  

  

The ΔG in the process of melting of ice at -150C and 1atm pressure is

  

  

  

  

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

  

  

  

  

What is the molecular formula of the product formed when benzene is reacted with ethyl chloride in presence of anhydrous aluminum chloride ?

  

  

  

  

Which of the following is not an air pollutant

  

  

  

  

An organic compound X on treatment with pyridinium chloro chromate in dichloromethane gives compound 'Y". Compound Y reacts with I2 and alkali to form triiodomethane. The compound 'X' is

  

  

  

  

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 two sulphur atoms in Na2S2O3 have

  

  

  

  

During the electrolysis of cyrolite,aluminium and fluorine are formed in.......molar ratio

  

  

  

  

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

  

  

  

  

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

  

  

  

  

An isomer of ethanol is

  

  

  

  

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

  

  

  

  

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

  

  

  

  

When compound X is oxidised by acidified potassium dichromate, compound Y is formed. Compound Y on reduction with LiAlH4 gives X. X and Y respectively are :

  

  

  

  

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

  

  

  

  

pH of pure H2O at 250C is

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Bauxite is a mineral for the extraction of :

  

  

  

  

Which one of the following equations represents the variation of viscosity coefficient (η) with temperature (T) ?

  

  

  

  

The conjugate acid of SO42- is

  

  

  

  

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

  

  

  

  

Which of the following reacts with ethanol to form chloroform

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

What is the correct order of occurrence (% by weight) in air of Ne, Ar and Kr ?

  

  

  

  

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 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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

CaCl2+C2H5OH→CaCl2xC2H5OH,in this ‘x’ is

  

  

  

  

The maximum number of sub-levels, orbitals and electrons in N shell of an atom are respectively

  

  

  

  

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

  

  

  

  

Which of the following converts acetic acid into acetyl chloride

  

  

  

  

A complex compound of CO3+ with molecular formula COClx. yNH3 gives a total of 3 ions when dissolved in water. How many Cl- ions satisfy both primary and secondary valencies in this complex

  

  

  

  

The earthy impurities present in the mineral are called

  

  

  

  

The molecular formula of potash alum is :

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Among  the following, which is water insoluble

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Assertion (A): The PH of a buffer solution containing equal moles of acetic acid and sodium acetate is 4.8  (pKa of acetic acid is 4.8)Reason (R): The ionic product of water at  250C is l0-14 mol2 .L-2. The correct answer is

  

  

  

  

The total pressure of a mixture of 6A of O2 and 5.6 g of N2 present in a 2 litre vessel is 1200 mm. What is the partial pressure (in mm) of nitrogen?

  

  

  

  

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

  

  

  

  

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):

  

  

  

  

∆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

  

  

  

  

Atoms of different elements having identical mass are known as :

  

  

  

  

Helium mixed with oxygen is used in the treatment of:

  

  

  

  

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

  

  

  

  

Gold number is used to show

  

  

  

  

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

  

  

  

  

Equivalent conductance at infinite dilution,λ0 of NH4Cl,NaOH and NaCl are 128.0,217.8 and 109.9 ohm-1cm2eq-1 respectively. The equivalent conductance of 0.01N NH4OH is 9.30 ohm-1cm2eq-1,then the degree of ionization of NH4OH at this temperature would be(approximately)

  

  

  

  

Which of the following set of variables give a straight line with a negative slope when plotted ?(P - vapour pressure, T = Temperature in K)

  

  

  

  

Which of the following statements is correct

  

  

  

  

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

  

  

  

  

Order of boiling points

  

  

  

  

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

  

  

  

  

Which of the following functional group shows +R effect

  

  

  

  

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

  

  

  

  

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 is not correct

  

  

  

  

Ordinary glass is a combination of the following

  

  

  

  

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

  

  

  

  

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

  

  

  

  

The most abundant group of lipids and animals is

  

  

  

  

Hydrolysis of sucrose with dilute aqueous sulphuric acid yields

  

  

  

  

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 :

  

  

  

  

148mg of Ca(OH)2 is required to remove hardness of one lit. of hard water by Clarke’s process. If hardness is due to only calcium bicarbonate, what is the degree of hardness of sample of water?

  

  

  

  

 Which of the following is a pair of functional isomers

  

  

  

  

9.2 gm of N2O4(g) is taken in a closed one litre vesseland heated till the following equilibrium is reached N2O4(g)⇔2NO2(g).At equilibrium 50% of N2O4(g) is dissociated.what is the equilibrium constant(in mole lit-1)(M.wt of N2O4 is 92)

  

  

  

  

The solubility of the impurities in the metal in molten and solid states is different. The principle involved in the refining of metal is

  

  

  

  

Dry distillation of calcium acetate and calcium formate forms:

  

  

  

  

The bonds in K4Fe(CN)6 are:

  

  

  

  

On passing a current through molten KCl 19.5 of K is deposited. The amount of aluminium deposited by the same quantity of electricity if passed through molten AlCl3 is

  

  

  

  

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

  

  

  

  

Which of the following alkali metals has the greatest tendency for the half reaction;  M(g) →M+(aq) + e

  

  

  

  

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

  

  

  

  

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

  

  

  

  

In nuclear reactor, heavy water is used as a :

  

  

  

  

The vant Hoff factor for 0.1M Barium nitrate is 2.74. The percentage of dissociation of barium nitrate 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)

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

A mixture of Haematite,coke and limestone on heating in blast furnace gives molten iron metal.This is known as

  

  

  

  

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

  

  

  

  

Which of the following pairs of ions are colourless ?

  

  

  

  

Which of the following has the highest first IP

  

  

  

  

X liter of carbon monoxide is present at STP. It is completely oxidized to CO2. The volume of CO2 formed is 11.207 litres. What is the value of X in litres

  

  

  

  

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

  

  

  

  

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