ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Grignard's reagent on treatment with carbonyl compounds yield

• Pheonol A
• Alcohol B
• Alkane C
• None of these D

Phenols are derivative of:

• Alkanes A
• Alkenes B
• Alkynes C
• Benzene D

• 1, 5-pentadiene A
• Penta-1, 4-diene B
• 1, 1-pentadiene C
• 1, 4-pentene D

1 erg of energy corresponds to

• 6.02 x 10²³J/mol A
• 6.02 x 10¹⁶J/mol B
• 1 erg/mol C
• 10^-7J/mol D

Turnbull's blue is a compound called?

• Ferricyanide A
• Ferrous ferricyanide B
• Ferrous cyanide C
• Ferri - Ferro cyanide D

The solubility of a gas in water depends upon

• Nature of the gas A
• Temperature B
• Pressure of the gas C
• All of the above D

Major component of natural gas is:

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

How many structural acid cis-trans isomers are there for dichloroprepe, C₃H₄Cl₂

• 3 A
• 5 B
• 6 C
• 7 D

The credit of discovering neutron goes to

• Rutherford A
• Langmuir B
• Chadwick C
• Austen D

Pakistan at the time of existence in 1947 was a country:

• agrarian A
• industrial B
• nuclear C
• economically strong D

• Rate is independent of concentration of water since it is in excess A
• Rate is independent of concentration of ester since it is in exces B
• Rate depends upon the concentration of acid catalyst added C
• Rate = k[CH₃COOC₂H₅]^1/2[H₂O]^1/2 D

Alkyl halides ae considered to be very reactive compounds towards nucleophiles because

• They have an electrophilic carbon A
• They have an electrophilic carbon and a good leaving group B
• They have an electrophilic carbon and a bad leaving group C
• They have a nucleophilic carbon and a good leaving group D

Which of these polymers is an addition polymer?

• Nylon-6,6 A
• Polystyrene B
• Terylene C
• Epoxy resin D

Which carbohydrates is an essential constituent of plant cells?

• Starch A
• Cellulose B
• Sucrose C
• Vitamins D

Acetic acid is manufactured by the fermentation of

• Ethanol A
• Methanol B
• Ethanal C
• Methanal D

Grignard reagent on reaction with a ketone forms

• Tertiary alcohol A
• Secondary alcohol B
• Primary alcohol C
• Carboxylic acid D

A system undergoes a change to attain the state of

• High energy A
• Low energy B
• Moderate energy C
• None of these D

Acetic Acid reacts with PCl₅ giving:

• Acetamid A
• Acetyl chloride B
• Alcohol C
• ether D

Hydrocarbans, SO₂, CO, NH₃, nitrogen oxides and compounds of fluorine are called

• Primary pollutant A
• Secondary pollutant B
• Tertiary pollutant C
• None of these D

Which of the following is a member of -block

• Zn A
• Al B
• B C
• Br D

Which one of the following is not a nuclelphile

• H₂O A
• H₂S B
• BF₃ C
• NH₃ D

General formula of aromatic carboxyl acids

• R---------------OH A
• RCOOH B
• RCOR C
• ARCOOH D

The graph between pressure and volume at constant temperature for a gas is

• Isobaric A
• Isothermal B
• Isotherm C
• None of above 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 temp. used for the hydrogenation of alkenes using Ni is

• 2000°C A
• 400°C B
• 200-- 300°C C
• 1000°C D

Tetraethyle lead causes disease:

• Typhoid A
• Respiratory B
• Stomach C
• Muscular D

If four moles of sulpur dioxide are oxidised to sulphur trioxide, how many moles of oxygen molecules are required

• 0.5 A
• 1.0 B
• 1.5 C
• 2.0 D

In Bohr model of hydrogen atom the distance between adjacent orbits increases away from the nucleus, the energy difference between the orbits

• Increases A
• Decreases B
• Reaming same C
• Orbits coincide D

Meta directing group decreased the ----------- of benzene ring

• Physical activity A
• Chemical reactivity B
• Density C
• None D

When electric current is used to carry out non-spontaneous redox, the process is called

• Hydrolysis A
• Electrolysis B
• Decomposition C
• Neutralization D