ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Which of the following human activities are contaminating surface and ground waters

• Pesticides A
• Septic tanks B
• Petroleum and natural gas production C
• All of these D

A solution sucrose is 34.2%. The volume of solution containing one mole of solute :

• 342cm³
  A
• 1000cm³
  B
• 500cm³ C
• 242cm³ D

Rosenmund's reduction of an acyl chloride gives

• An aldehydes A
• An alcohol B
• An ester C
• A hydrocarbon D

Mild oxidation of glycerol with H₂O₂/FeSO₄gives

• Glyceraldehyde A
• Dihydroxy acetone B
• Glycerose C
• None D

Hydrogenation of alkenes/alkynes inthe presence of Ni as catalyst at 3000°C result in the formation of corresponding alkanes. This reaction is known as

• Sabatier-senderens reaction A
• kolbes reaction B
• Cannizaro's reaction C
• Haloform reaction D

C- X bond is strong in

• CH₃Cl A
• CH₃Br B
• CH₃F C
• CH₃I D

Corrosion of iron can be prevented by coating the surface with

• Zn A
• Sn B
• Ni C
• Any of the above D

In sp²type hybridization the three equivalent sp²orbitals lie in the same plane and at angle of

• 0° A
• 60° B
• 120° C
• 180° D

Which is not a steroid

• Cholesterol A
• Ergosterol B
• Phospholipids C
• None of these D

Aromatic compounds burn with sooty flame cause

• They have high percentage of hydrogen A
• They have a ring structure B
• They have high percentage of carbon C
• They resist reaction with air D

In Boyle's law which of the following pair is variable :

• Temperature and quantity of a gas. A
• Pressure and volume B
• Volume and quantity of a gas. C
• Pressure and quantity of a gas. D

The only non-metal in liquid form is

• S A
• Cl B
• Br C
• P D

d-block elements closely resemble in their physical and chemical properties. Which statement is incorrect

• They show variable valency A
• Their ions and compounds are coloured B
• They are good conductors of heat and electricity C
• Their compounds are diamagnetic D

Maximum hydrogen bonds in water are

• 4 A
• 3 B
• 2 C
• 8 D

Which of the following is a polar molecules

• Carbon dioxide A
• Carbon tetrachloride B
• Methanol C
• Ethane D

Chemical composition of colemnite is:

• Ca₂B₆O₁₁.5H₂O A
• CaB₄O₇ .4 H₂O B
• Na₂B₇O₇. 4 H₂O C
• CaNaB₅O₉.8H₂O D

Which of the following oxides is unlikely to dissolve in aqueous hydroxide

• Al₂O₃ A
• MgO B
• SO₂ C
• SIO₂ D

Which of the following transition metal ions will have definite value of magnetic moment?

• Se³⁺ A
• Ti³⁺ B
• Cu⁺ C
• Zn²⁺ D

In the modern periodic table the elements are placed in the ascending order of their

• Atomic masses A
• Melting points B
• Boiling points C
• Atomic numbers D

• Addition Elimination A
• Addition Reduction B
• Elimination Reduction C
• Substitution Elimination D

Saturated solution of a solid is prepared at a constant temperature. 100 cm³of this saturated solution is evaporated in a china dish. The mass of the residue is called

• Azetropic mixture A
• Solubility B
• Solubility product C
• Equilibrium constant D

Which one is not a pollutant normally?

• Hydrocarbons A
• Carbon dioxide B
• Carbon monoxide C
• Sulphur dioxide D

Carboxyl group has functional group in it:

• One A
• Two B
• Three C
• Four D

The amount of solute present in the given amount of solvent is called

• Molarity A
• Molality B
• Concentration C
• Solubility D

Fe can displace Cu form CuSO4solution because

• Fe is ferromagnetic A
• Fe is below Cu in electrochemical series B
• Fe is above Cu in electrochemical series C
• Fe exists in divalent oxidation state D

Which of the following statements is not true?

• Isotopes with even atomic masses are comparatively abundant A
• Isotopes with even atomic masses are comparatively abundant B
• Isotopes with even atomic masses and even atomic numbers are comparatively abundant C
• Isotopes with even atomic masses and odd atomic number are comparatively abundant D

Which is not the affect of polluted air on environment

• Acid rain A
• Smog B
• Ozone C
• Global warming D

Which one of the following is not a buffer

• H₂CO₃+ NaHCO₃solution A
• H₃PO₄+ NaH₂PO₄solution B
• Hl + Nal solution C
• NH₄OH + NH₄CI solution D

Oxidation of ter-alcohol gives:

• Aldehyde A
• Formaldehyde B
• Ketone C
• Alkens D

Which following derivative cannot be prepared directly from acetic acid?

• Acetamide A
• Acetyl chloride B
• Acetic anhdride C
• Ethyl acetate D