ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Reduction with aluminium isopropoxide in excess of Isopropyl alcohol is called Meerwein Ponndroff-Verley reduction (MPV). What will be the final product when cyclohex-2-enone is selectively reduces in MPV reaction?

• Cyclohexanol A
• Cyclohex-2-enol B
• Cyclohexanone C
• Benzene D

• Hear of reaction A
• Heat of formation B
• Heat of neutralization C
• Heat of combustion D

Organic compounds generally react at ______ rates

• Slow A
• Fast B
• Moderate C
• None of them D

Which of the following is not isoelectronic?

• Na⁺ A
• Mg²⁺ B
• O^2- C
• Cl^- D

Which one of the following particles has amass 1/1836 time, that of hydrogen?

• Neutron. A
• Proton. B
• Electron. C
• Positron. D

Tollen's reagent is

• Ammonical cuprous chloride A
• Ammonical cuprous oxide B
• Ammonical silver bromide C
• Ammonical silver nitrate D

Zeotropic mixture

• Obey Henry's law A
• Obey Raoult's law B
• Does not obey Raoult's law C
• Obey Dalton's law D

Which step is unnecessary for purification of water for drinking purposes

• Aeration A
• Coagulation B
• Treatment with chlorine C
• Treatment with iodine D

Which is not a calcarious material

• lime A
• clay B
• marble C
• marine shell D

Dehydration of allcohol gives:

• Alkane A
• Alkene B
• Aldehyde C
• ketone D

Cracking done at low pressure and with a catalyst is called _______ cracking

• Thermal A
• Catalytic B
• Steam C
• None of them D

There are 20 amino acids found in protein which is not the property of these amino acids

• They are allα-amino acids A
• They are all optically active B
• They have high decomposition point C
• They are water soluble D

Corrosion reaction are

• Spontaneous redox reaction A
• Non-spontaneous acid-base reactions B
• Spontaneous acid-base reactions C
• None of these D

Common names of aldehydes are given by corresponding:

• Ketone A
• Alcohol B
• Carboxylic acid C
• ester D

When a system absorbs energy, the sign of delta E is

• Neither positive nor negative A
• Negative B
• Positive C
• None of above D

When metallic sodium in ether is heated with ethyl chloride, which alkane is formed

• Propane A
• Ethane B
• Iso-butane C
• N-butane D

Ethyl alcohol on oxidation with K₂Cr₂O₇gives

• Acetic acid A
• Acetaldehyde B
• Formaldehyde C
• Formic acid D

Diamond is a bad conductor because

• It has a tight structure A
• It has a high density B
• there is no free electron present in the crystal of diamond of conduct electicity C
• Is transparent to light D

If acetyl chloride is reducing in the presence of BaSO₄and Pd, then

• CH₃CHO is formed A
• CH₃CH₂OH is formed B
• CH₃COOH is formed C
• CH₃COCH₃is formed D

The functional group of acid amide is

• 
  A
• 
  B
• 
  C
• 
  D

In OF₂, number of bond pairs and Ione paris of electrons are respectively

• 2,6 A
• 2,8 B
• 2,10 C
• 2,9 D

Which of the following is the most suitable method for removing the traces of water from ethanol?

• Reacting with Na metal A
• Passing dry HCl through it B
• Distilling it C
• Reacting with Mg D

In a group form top to bottom, the hardness of alkali metals

• Remains unchanged A
• Increases B
• Decreases C
• None D

The conversion of chemical energy into electrical energy requires :

• Electrolytic cell A
• Galvanic cell B
• Voltaic cell C
• Both (b) and (c) D

Which of the following brings about the conversion of starch into maltose

• Maltase A
• Zymase B
• Diatase C
• Invertase D

In the atomic emission spectrum the lines which appear bright, appear dark in absorption spectrum because

• The radiations emitted in emission spectrum are absorbed in absorption spectrum A
• Atomic emission spectrum is continuous B
• Atomic absorption spectrum is continuous C
• Distance between the lines increases D

Which of the following is a colligative property?

• Melting point A
• Osmotic pressure B
• Freezing point C
• Sublimation temperature D

Effective magnetic moment of Sc³⁺ion is

• 1.73 A
• 0 B
• 5.92 C
• 2.83 D

Hydrocarbon molecule with large chain lengths experience:

• Weaker attractive forces A
• Stronger attractive forces B
• Repulsive forces C
• No attractive forces D

From ₃₉Y to ₄₈Cd are called

• Transition elements A
• Outer transition elements B
• Inner transition elements C
• 2nd transition series D