ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

The metal present in blood is

• Al A
• Hg B
• Cu C
• Fe D

Polyanion formation is maximum in

• Nitrogen A
• Oxygen B
• Sulphur C
• Boron D

The general formula of saturated alicyclic hydrocarbons is:

• C_nH_n A
• C_nH_2n B
• C_nH_2n+2 C
• C_nH_2n-1 D

II-A group element are called:

• s-block elements A
• p-block elements B
• d-block elements C
• f-block elements D

Linear geometry is present in:

• Sp³ A
• Sp² B
• Sp C
• D²sp³ D

Which reagent will distinguish a ketone from an aldehyde

• Br₂ A
• 2, 4-dinitrophenylhydrazine B
• NaBH₄ C
• Tollen's reagent D

Chile saltpetre has the chemical formule

• NaNO₃ A
• KNO₃ B
• Na₂B₄O₇ C
• Na₂CO₃.H₂O D

In an ooctahedral crystal field splitting, the number of orbitals pushed down in energy is

• 3 A
• 2 B
• 5 C
• Zero D

The less reactivity of transition metal is due to

• High heats of sublimation A
• High ionization energies B
• Low heats of salvation C
• All these D

The chemical formula of chile salt peter is

• Na₂CO₃ A
• KNO₃ B
• NaNO₃ C
• NaNO₂ D

What mass of NaOH is required to prepare 2.5 dm³of 1.5 M NaOH solution

• 130 g A
• 140 g B
• 150 g C
• 160 g D

Nitrogen is present in atmosphere by weight

• 75% A
• 76% B
• 77% C
• 78% D

When SO₂is passed through acidified K₂Cr₂O₇solution

• The solution turns blue A
• The solution is decolourised B
• SO₂is reduced C
• Green Cr₂(SO₄)₃is formed D

Lactic acid on oxidation by alkaline potassium permanganate gives

• Tartaric acid A
• Pyruvic acid B
• Cinnamic acid C
• Propionic acid D

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

During the mechanism of aldol condensation a/an ______ is formed

• Oxide A
• Alkali B
• Alkoxide ion C
• None of these D

Replacement of hydrogen by NO₂group is called

• Sulphonatioin A
• Hydration B
• Nitration C
• Cracking D

Which of all following compound is not possible

• 
  A
• 
  B
• 
  C
• 
  D

The region of earth capable of supporting life is

• Hydrosphere A
• Lithosphere B
• Biosphere C
• Atmosphere D

Which factor is helping to reduce the environmental pollution

• Rapid growth of population A
• Urbanization B
• Industrialization C
• Increase of plantation D

The total number of inner transition elements in the periodic table is

• 10 A
• 14 B
• 28 C
• 30 D

The order of frequency of the following radiations unltraviolet, visible, infrared and microwave is

• Microwave > infrared > visible > ultraviolet A
• Visible > ultraviolet > microwave > infrared B
• Ultraviolet > visible > infrared > microwave C
• Infrared > microwave > ultraviolet > visible D

What element is not essential the growth of plants and is not required in the fertilizers

• Nitrogen A
• Potassium B
• Phosphorus C
• Barium D

Identify the heterocyclic compound

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

• 0 A
• 1 B
• 2 C
• 3 D

The wave number of the line emitted is 109.678 x 10⁵m^-1in the Lyman series when electron transition occurs

• 
  A
• 
  B
• 
  C
• 
  D

White P when boiled with strong solution of caustic soda produces

• Phosphine A
• Posh acid B
• Phosphorous acid C
• None D

The periodic table gives basic framework to study the periodic.

• Elements only A
• Compounds only B
• Elements and their compounds C
• Elements and their inorganic D

Rutherford's model of atom failed because:

• The atom did o have a nucleus and electrons A
• It did not account fro the attraction b/w protons and neutrons B
• It did no account for the stability of the atom. C
• There is actually no space b/w the nucleus ad the electrons. D

Monosaccharides are

• Aldoses A
• Ketoses B
• Either a and b C
• None of these D