ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Which of the following is explosive?

• Trinitrophenol A
• Nitrophenol B
• Nitromethane C
• Nitrobenzene D

The sum of the exponents of the conc. terms in the rate equation is called

• Rate of reaction A
• Order of reaction B
• Specific rate constant C
• Average rate D

Which of the following is used as disinfectant

• K₂Cr₂O₇ A
• KMnO₄ B
• K₂MnO₄ C
• K₂CrO₄ D

The next homologue of C₁₀H₂₂will be

• C₉H₂₀ A
• C₁₂H₂₆ B
• C₁₁H₂₄ C
• C₁₃H₂₈ D

Lead acid batteries discharge with time because of.

• Deposition of PbSO4, at anode A
• Deposition of PbSO4 at cathode B
• Both A and B C
• Acid neutralizes with time D

During electrolysis of KNO₃, H₂is evolved

• Anode A
• Cathode B
• Both a and b C
• None D

Alkaline earth metals posses two electrons in their outermost

• F-orbital A
• D-orbital B
• S-orbital C
• P-orbital D

Which of the following has unchanged valency?

• H A
• Na B
• Fe C
• Oxygen D

Amides on treatment with Br₂and KOH are converted into amines, the reaction is known as

• Hoffmann's bromamide reaction A
• Hoffmann's methylation B
• Gabriel phthalimide reaction C
• H.V.Z reaction D

Strong oxidizing agents have

• Greater positive value of standard reduction potential A
• Lesser positive value of standard B
• Greater negative value of standard C
• None of these D

During nitration of benzene. the active nitrating agent is

• NO₃^-1 A
• NO₂⁺ B
• NO₂^-1 C
• HNO₃ D

Among group V-A elements, the most electronegative element is:

• Sb A
• N B
• P C
• As D

Which of the following is a method of converting a unsaturated ketone into unsaturated hydrocarbon?

• Aldol condensation A
• Reimer Tiemann reaction B
• Cannizaaor's reaction C
• Wolf-kishner reduction D

Metallic conduction is also called as :

• Ionic conduction. A
• Protonic conduction. B
• Electronic conduction C
• Super conduction D

The raw materials for the manufacture of urea fertilizer is

• Hydrogen and ammonia A
• Steam, methane, ammonia B
• Methane and air C
• None of these D

Methyl alcohol is not used

• As a solvent A
• A an anti-freezing agent B
• As a substitute for petrol C
• For denaturing of ethyl alcohol D

The forced which holds together two or more atoms or ions to form a large variety of compounds in called:

• A chemical bond. A
• An ionic bond. B
• A covalent bond. C
• A coordinate bond. D

Silicon atom is hybridized:

• sp A
• sp² B
• sp³ C
• dsp² D

The alkynides are used for the ----------- of alkynes

• Pxperation A
• Purification B
• Seperation C
• All of above D

A solutiion of 0.5 mole camphor in 100 grmas chloroform (K_b= 0.322) has rise in boiling point than that of chloroform by

• 0.81°C A
• 1.61°C B
• 1.81°C C
• 0.61°C D

Identify the heterocyclic compound

• Toluene A
• Pyridine B
• Butanoic acid C
• Propenol D

When the electron jumps form third, fourth, fifth orbits to the second orbit, the transitions are known as

• Paschen A
• Pfund B
• Balmer C
• Brackett D

Relative atomic mass of an element is the mass of the element relative to

• 1/12 mass of carbon-12 A
• 1/12 mass of carbon B
• 1 mass of hydrogen atom C
• 1/16 mass of oxygen D

The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with the rule

• Hund's rule A
• Markowvikov's rule B
• Pauli's exclusion principle C
• Auf ban principle D

By the use of catalysis the energy of activation is

• Decreased A
• Increased B
• Not affected C
• None D

Terylene is madeby polymerization of terephthalic acid with

• Ethylene glycol A
• Phenol B
• Ethanol C
• Catechol D

The number of groups in the periodic table is

• 6 A
• 7 B
• 8 C
• 9 D

• Cu A
• H B
• N C
• O D

Pauli's principle is applicable to

• Degenerate orbits A
• Two electrons in the same orbital B
• One electron C
• None D

When fused PbBr₂is electrolyed then

• Bromine appears at cathode A
• Lead deposited at the cathode B
• Lead appears at the anode C
• None of these happens D