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:

  

  

  

  

X,Y,Z hydrocarbons molecular formula are CH4, C2H4, C2H2, these three are passed through porcelain tube containing ammonical cuprous chloride. The out coming gases would be

  

  

  

  

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

  

  

  

  

On passing a current through a KCl solution, 19 5 g. of potassium is deposited. If the same quantity of electricity is passed through a solution of aluminium chloride, the amount of aluminium deposited is:

  

  

  

  

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

  

  

  

  

Bhopal gas tragedy of 1984 was caused by

  

  

  

  

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

  

  

  

  

Anhydrous Magnesium chloride can be prepared by heating MgCl2.2H2O

  

  

  

  

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

  

  

  

  

AB is an ionic solid. The ionic radii of A+ and B- are respectively rc and ra. Lattice energy of AB is proportional to :

  

  

  

  

The standard reduction electrode potential values of the elements A, B and C are +0.68V, -2.5V and -0.5V respectively. The order of their reducing power 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

  

  

  

  

Which one of the following elements reduces NaOH to Na?

  

  

  

  

The earthy impurities present in the mineral are called

  

  

  

  

Which of the following reacts with ammoniacal cuprous chloride

  

  

  

  

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

  

  

  

  

In dry cell cathode is

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Which of the following is correct ?

  

  

  

  

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

  

  

  

  

Hydrolysis of chloroform with aqueous KOH gives finally

  

  

  

  

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

  

  

  

  

The decomposition of H2O2 may be decreased by adding a small quantity of glycerol.This is an example of

  

  

  

  

One mole of A and 2 moles of B are allowed to react in a one lit flask. What is the value of Kc if at equilibrium,0.4 moles of C is formed in the reaction A+2B⇔C+2D

  

  

  

  

The first organic compound synthesized in the laboratory from an inorganic compound is:

  

  

  

  

The oxidation state of Mo in MO2 (Cl8)4- ion is

  

  

  

  

What is the volume (in litres) of oxygen required at STP to completely convert 1.5 mol of sulpher into sulpher dioxide

  

  

  

  

Order of boiling points

  

  

  

  

Which of the following is a favourable factor for cation formation

  

  

  

  

Two oxides of nitrogen,NO and NO2 react together at 2530K and form a compound of nitrogen X.X reacts with water to yield another compound of nitrogen Y.The shape of the anion of Y molecule is

  

  

  

  

In 0.01 M solution,HCN is 0.01% ionized. Its dissociation constant is

  

  

  

  

H3O++OH-→2H2O

  

  

  

  

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 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 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

  

  

  

  

Dry distillation of calcium acetate and calcium formate forms:

  

  

  

  

Which one of the following reactions does not form gaseous product

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Aluminium reacts with NaOH and forms compound X. If the coordination number of aluminium in X is 6, the correct formula of X

  

  

  

  

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

  

  

  

  

The olefin which on ozonolysis gives CH3CH2CHO and CH3CHO is

  

  

  

  

In photoelectric effect, if the energy required to overcome the attractive forces on the electron,(work functions) of Li, Na and Rb are 2.41eV, 2.30eV and 2.09eV respectively, the work function of ‘K’ could approximately be in eV

  

  

  

  

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

  

  

  

  

Which of the following is not correct

  

  

  

  

 Which of the following is not correct

  

  

  

  

While phosphorus form PCl5, nitrogen does not form NCl5 because

  

  

  

  

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

  

  

  

  

3.42g of substance of molecular weight 342 is present in 250g of water.Molality of this solution is

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

In lime kiln the reaction CaCO3(s)⇔CaO(s)+CO2(g)

  

  

  

  

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

  

  

  

  

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 ?

  

  

  

  

An organic compound containing C and H has 92.3% of carbon, Its empirical formula is:

  

  

  

  

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

  

  

  

  

Which of the following is an endothermic reaction ?

  

  

  

  

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

  

  

  

  

An isomer of ethanol is

  

  

  

  

The addition of HCl will not suppress the ionization of

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Calorific value of producer gas is low because of

  

  

  

  

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

  

  

  

  

The copper metal is mainly extracted from its

  

  

  

  

The molecule having zero dipole moment is:

  

  

  

  

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

  

  

  

  

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

  

  

  

  

During electrolytic reduction of aluminia,the reaction at cathode is

  

  

  

  

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

  

  

  

  

The final product formed on the strong heating of H3BO3

  

  

  

  

Which of the following reacts with ethanol to form chloroform

  

  

  

  

'Natalite' is used as

  

  

  

  

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

  

  

  

  

Which one of the following compounds liberates CO2 from aqueous NaHCO3

  

  

  

  

The molarity of pure water is:

  

  

  

  

Vicinal dihalide (C2H4Br2) on heating with excess alc.KOH and Zinc dust gives ’y’ and ‘z’ respectively. Both ‘y’ and ’z’ on oxidation with Bayer’s regent gives A and B.A and B respectively are

  

  

  

  

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

  

  

  

  

Anhydrous Magnesium chloride can be prepared by heating MgCl26H2O

  

  

  

  

H2-O2 fuel cell is

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Carbogen to

  

  

  

  

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?

  

  

  

  

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

  

  

  

  

The solubility of AgCl in NaCl solution is less than that in pure water,because

  

  

  

  

If 20 mL of 0.4 N NaOH sol ution completely neutralised 40 mL of a dibasic acid, the molarity of the acid solution is :

  

  

  

  

The numbers of unit cells present in 5.85mg of NaCl crystal are

  

  

  

  

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

  

  

  

  

For the reaction 2SO2(g)+O2(g)2SO3(g) taking place in one litre vessel, the number of moles of SO2 ,O2,SO3 at equilibrium are 2,1 and 2 moles respectively, under a total pressure of 15 atm.The Kp of the reaction is

  

  

  

  

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

  

  

  

  

A catalyst increases the rate of reaction because it :

  

  

  

  

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

  

  

  

  

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