ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

• 0.60 A
• 1.67 B
• 0.66 C
• 2.6 D

• RCH(CH₃)CO₂H + CH₃OH A
• RCH(CH₃)CO₂H + HCO₂H B
• RCH(CH₃)OH + CO₂ C
• RCH(CH₃)OH + HCO₂H D

The solution of which acid is used for seasoning of food

• Formic acid A
• Acetic acid B
• Benzoic acid C
• Butanoic acid D

Acidic hydrolysis of acetamide gives

• Acetaldehyde A
• Acetic acid B
• Methyl amine C
• Formic acid D

The function of salt bridge in galvanic cell is

• To prevent accumulation of ions in two half A
• To add salt ions in two half B
• To block flow of ions between two half C
• None of these D

The prosthetic group in glycoprotein is

• Carbohydrate A
• Fat B
• Vitamin C
• Nucleic acid D

Primary and secondary alcohols on action of red hot copper give

• Aldehydes and ketones respectilvely A
• ketones and aldehydes respectively B
• Only aldehydes C
• Only ketones D

Which of the following elements is not present abundantly in earth's crust?

• Silicon A
• Aluminium B
• Sodium C
• Oxygen D

Increasing skin cancer and high mutation rate are due to

• Acid rain A
• Ozone depletion B
• CO pollution C
• CO₂Pollution D

Which is a reagent for Lucas test

• ZnCl₂+ Conc. HCl A
• Zn B
• Na C
• Br D

Acetone reacts with HCN to form a cyanohydrin. It is an example of

• Electrophilic addition A
• Electrophilic substitution B
• Nucleophilic addition C
• Nucleophilic substitution D

95% ethanol is called :

• Rectified ether. A
• Diesel. B
• Rectified spirit. C
• Petrol. D

On passing ethane into concentrated suphuric acid the intermediate compound formed on hydrolysis with boiling water gives

• Methyl alcohol A
• Ethyl alcohol B
• Ethyl hydrogen sulphate C
• Methyl hydrogen sulphate D

Vegetable oils are

• Unsaturated fatty acids A
• Glycerides of unsaturated fatty acids B
• Glyccerides of saturated fatty acids C
• Essential oils obtained from plants D

The three N - Hσ-bonds are made by

• sp³- s overlap A
• sp²- s overlap B
• P - p overlap C
• sp - overlap D

The temperature in the incineration process has a range:

• 900°Cto 1000°C A
• 650 to 1100°C B
• 950°C to 1300°C C
• 500°C to 900°C D

Macromolecules are

• organic molecules A
• High molecular mass molecules B
• Natural compounds C
• Rarely occurring molecules D

Which metal is used in the thermit process because of its activity?

• Iron A
• Copper B
• Alumnium C
• Zinc D

• Br_2(aq) A
• 2, 4-dinitrophenylhydrazine B
• NaBH C
• Tollen's reagent D

Ethyl alcohol gives ethyl chloride with the help of

• SOCl₂ A
• NaCl B
• Cl₂ C
• KCl D

The reaction of acetaldehyde with HCN followed by hydrolysis gives a product which exhibits

• Metamerism A
• Tautomerism B
• Enatiomerism C
• Geometrical isomerism D

• 4-methyl pentene A
• 2-methyle-1-butene B
• 2-methyl propane C
• None of the above D

The total number of transition elements is

• 10 A
• 14 B
• 40 C
• 50 D

During oxidation in k₂Cr₂O_{7, Cr VI changes to :}

• I A
• II B
• III C
• IV 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

The organic compounds containing Ph--OH group are called:

• Phenol A
• Aldehyde B
• Ketones C
• Carboxylic acids D

The amount of energy required to remove an electron from an atom of an element in the gaseous state is called

• Electron affinity A
• Electronegatively B
• Ionization energy C
• None of these D

The noble gas have

• Very low ionization energies A
• High boiling points B
• No electron pair interaction C
• No van Der Waal's forces D

Give IUPAC name fo Acetone

• Ethanal A
• Propanone B
• Butanone C
• Propanal D

In Millikan method for determination of charge on electron the air in the chamber is ionized by

• Protons A
• Electric field B
• X-rays C
• a - particles D