ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Which statement about the following equilibrium in correct?

2SO_{2 (g)}+ O_2(g)---------------2sO_3(g)H= - 188.3 KJ mol-1

• T value of K_{p falls witha rise in temperate.} A
• The value of K_{p falls withincreasing pressure}
  B
• Adding V_2O5catalyst increase the equilibrium yield of sulfur trioxide
  C
• The value of K_{p is equal to}K_p D
• 
  
  E

Anode is the surface on which probability of finding electron is:

• 50% A
• Less than 10%. B
• More than 95%. C
• Zero. D

Hydrolytic coversion of sucrose into glucose and fructose is known as

• Induction A
• Inversion B
• Insertion C
• Inhibition D

An organic compound A reacts with methyl magnesium iodide to form an addition product which on hydrolysis forms the compound B . Compound B gives blue colour salt in Victor Meyer's test.The compounds A and B are respectively

• Acetaldehyde, tertiary butyl alcohol A
• Acetaldehyde, ethyl alcohol B
• Acetaldehyde, isopropyl alcohol C
• Acetone, isopropyl alcohol D

A compound containing carboxyl group in them are called:

• Ketone A
• Ether B
• Carboxylic acids C
• Polycarboxylic acid D

Which set of hybrid orbitals has planar triangle shape?

• sp³ A
• sp B
• sp² C
• dsp² D

The addition of HCN to carbonyl compounds is an example of

• Nucleopihlic substituion A
• Electrophilic addition B
• Nueleophilic addition C
• Electrophilic substitution D

The molarity of toluene solution in benzene is 0.22 if 5 grams of toluene dissolved, then mass of benzene is grams is

• 267 A
• 260 B
• 240 C
• 247 D

All reactions occur in :

• A single step. A
• A series of steps B
• Two steps. C
• Both (a) and (b) D

Which reaction yields Bakelite?

• Urea with HCHO A
• Tetramethyl glycol with Hezamethylene diisocyanate B
• Phenol and HCHO C
• Ethylene glycol and Dimethylterephthalate D

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

• Ag⁺ A
• Cu²⁺ B
• Al³⁺ C
• Si⁴⁺ D

Potassium hexacyanoferrate (II) has the formula

• K₄[Fe(CN)₆] A
• K₃[Fe(CN)₆] B
• K₂[Fe(CN)₆] C
• K [Fe(CN)₆] D

Aldehydes are oxidizes are to give:

• Primary alcohol A
• Sec-alcohol B
• Ter-alcohol C
• Carboxylic acid D

Use of ethanol as:

• Drink A
• Solvent and fuel B
• In beverage C
• All of these D

The wave length of electron as wave is 0.5 nm. What is the wave length in meter

• 5 x 10^-9 A
• 5 x 10^-12 B
• 5 x 10^-6 C
• 5 x 10^-10 D

Elements in the same family have

• Same atomic number A
• Molecular wt same B
• Same chemical properties C
• Same electronic configuration D

Which is not the condition for the formation of smog

• There must be sufficient NO gas A
• There must be sunlight to help photo chemical reaction to take place B
• Air must be blowing swiftly C
• There must be SO₂in the air D

When initial concentration of reactants an order of reaction is given, then its half life period can be calculated by the equation

• 
  A
• 
  B
• 
  C
• 
  D

Which is a component of macronutrient?

• Zn A
• N B
• Mo C
• Cl D

Synthetic polymer prepared from caprolactum is known is

• Nylon 610 A
• Teflon B
• Terylene C
• Nylon-6 D

When alkyl is treated with chlorine in the presence of sunlight

• 1,3 dichloroproduct is formed A
• 1,4 dichloro product is formed B
• 1,3,5 trichloro product is formed C
• Only alkyl group is substituted D

When a nitrogeneous base combine with a sugar it is called

• Ribose A
• Nucleotides B
• Nucleoside C
• None D

A pseudo uni-molecular reaction has order of reaction :

• 3 A
• 2 B
• 1 C
• 0 D

The order of distance between the various Bohr orbits is

• r₂- r₁> r₃- r₂> r₄- r₃> ...... A
• r₁> r₂> r₂- r₃> r₄-r₃> ..... B
• r₂-r₁= r₃- r₂= r₄- r₃> ..... C
• r₂- r₁> r₃- r₂< r₄- r₃< .... D

• KC = KP A
• Kp = KcRT B
• Kp = kc(RT)^-2 C
• Kp = Kc(RT)^-1 D

Chloroform and acetone are soluble in each other due to:

• Instantaneous dipole interactions. A
• Dipole-dipole interactions. B
• Inter molecular hydrogen bonding. C
• All of above D

Kolb's method is not useful for the production of

• Methane A
• Ethane B
• Propane C
• Butane D

The rate of reaction :

• Decreases as the reaction proceeds A
• Increases as the reaction proceeds B
• May decrease or increase reaction proceeds C
• Remains same as the reaction proceeds D

As a fixing agent in photography, sodium thisoulphate is used for

• Dissolving out unreacted silver bromide A
• Converting silver B
• Reducing solubility of AgBr C
• Preventing overdeveloping and fogging D

Which of the following compounds will react with reagent ?

• CH₃ CO H A
• CH₃ CO CH₃ B
• CH_{3 COOH} C
• CH₃ CO CH₂CH₃ D