ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

By state, we mean the

• Reaction of system A
• Scope of a system B
• Condition of a system C
• None of above D

Acetone is prepared by

• Oxidation of n-propyl alcohol A
• Oxidation of acetaldehyde B
• Pyrolysis of calcium acetate C
• Pyrolysis of calcium acetate as well as acetic acid D

Chemical equilibrium involving reactants and products in more than one phase is called

• Static A
• Dynamic B
• Homogeneous C
• Heterogeneous D

Alkanes are least reactive towards:

• Acids and bases A
• Reducing agents B
• Oxidizing agents C
• All of these D

C₆H₁₂O₆ is molecualr formula of:

• Glucose A
• Dextrose B
• Fructose C
• All of these D

An electrophile may be

• Positive A
• Negative B
• Neutral C
• Both c and a D

The density of a gas is directly 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

• Small change in concentration of product A
• Small time internal B
• Co-efficient of the reactant C
• Co-efficient of the product D

Which one of the following reagents will distinguish between C₆H₅CHO and C₆H₅COCH₃

• Aqueous bromine A
• Phosphorus pentachloride B
• 2, 4 DNPH C
• Tollen's reagent D

Which three elements are needed for the healthy growth of plants

• N, S, P A
• N, Ca, P B
• N, P, K C
• N, K, C D

When sodium metal reacts with alcohols

• Hydrogen gas evolves A
• Sodium hydroxide is obtained B
• Alcohol is reduced C
• Alcohol is polymerised D

Metallic conduction is also called as :

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

Which of the following species has the highest ionization potential?

• Ne A
• Al⁺ B
• Mg⁺ C
• Li⁺ D

Burning of coal and hydrocarbon in air are examples of :

• Non-spontaneous reaction. A
• Spontaneous reaction. B
• Natural reaction C
• Both (a) and (C) D

How many moles of hydrogen atoms does 3.2 g of methane, CH₄, contain?

• 0.02 A
• 0.2 B
• 0.4 C
• 0.8 D

If the rate equation of a reaction 2A+B-------->Products is , Rate = K[A] [B], and A is present in large excess, then order of reaction is :

• 1 A
• 2 B
• 3 C
• Above D

• NH₃ HCl A
• KCN in C₂H₅OH NaOH B
• KCN in C₂H₅OH HCl C
• HCN NaOH D

The solution of which acid is use for seasoning of food?

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

According to the periodic law, the chemical properties of the elements are periodic functions of their

• Density A
• Atomic number B
• Atomic mass C
• Mass number D

The orbital in Rutherford's model is

• Spiral A
• Circular B
• Both C
• None D

In microwave own , the wave energy produced in absorbed by certain polar molecule, On which molecule out of the given molecules would maximum energy?

• SiO2 A
• NaCl B
• C2H5OH C
• None of these D

• 8 g A
• 16 g B
• 32 g C
• 24 g D

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

• Uninfluenced by occurrence of thuderstorm A
• Which depends on the amount of dust in air B
• Slightly lower than that of rain water without thunderstorm C
• Slighlty higher than that when the thunderstom is not there D

Radioactive element in halogens is

• Astatine A
• bromine B
• Iodine C
• Fluorine D

Sodium thisoulophate is used in photography because of its

• Oxidizing behaviour A
• Reducing behaviour B
• Complexing behaviour C
• Photochemical behaviour D

Alkali metals in each period have

• Smallest size A
• Lowest IE B
• Highest IE C
• Highest electronegativity D

Coinage metals like Au, Pt, Ag and Cu are the least reactive metals and don't liberate H₂gas when treated with acids because

• These have very high positive values of reduction potentials A
• These have very high negative values of reduction potentials B
• Their ionization potentials are lowest C
• Their reduction potentials are close to SHE D

Which is the formula of tetra-ammine chloronitro platinum (VI) sulphate?

• [Pt(NH₃)₄(NO₂)]SO₄ A
• [PtNO₂Cl(NH₃)₄]SO₄ B
• [PtCl(NO₂)(NH₃)₄]SO₄ C
• [Pt(NH₃)₄(NO₂)Cl]SO₄ D

Calorie is equivalent to :

• 0.4184 J A
• 4184 J B
• 4.184 J C
• 418.4 J D