ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

The apex angle of the folded filter paper is slightly greater than :

• 60°
  A
• 30° B
• 45° C
• 90° D

• Le-chatlier's principle A
• Only adding catalyst B
• Decreasing pressure C
• Decreasing temperature D

The Electro-negatively difference for ionic bond must be greater than

• 1.6 A
• 1.7 B
• 1.8 C
• 1.0 D

Which of the following is not a hydrocarbon

• Butane A
• Methyl benezene B
• Acetylene C
• Glucose D

The oxides of which of the following elements will be acidic in character

• Mg A
• Rb B
• Li C
• Cl D

A colourless liquid, at room temperature reacts with soda lime to form sodium salt of carboxylic acid and ammonia gas. The liquids is

• Propanamide A
• Propanoic acid B
• Formamide C
• Methyl Ethanoate D

Which of the following statement is correct for a chemical reaction to occur molecules of substances must

• Collide with each other A
• Collide with energy more than activation energy B
• Collide with energy less than activation energy C
• Collide with high frequency D

Ketones are prepared by the oxidation of:

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

Variable valency is generally exhibited by

• Normal elements A
• Transition elements B
• Metallic elements C
• None of these D

Which of the following is acidic?

• SO₃ A
• N₂O B
• BeO C
• HgO D

What is the nature of Al₂O₃

• Acidic A
• Basic B
• Amphoteric C
• Neutral D

Linear geometry is present in:

• Sp³ A
• Sp² B
• Sp C
• D²sp³ D

Which one of the following elements occurs free in nature?

• N A
• P B
• As C
• Sb D

N-atom forms three covalent bonds, its electronic configuration is

• 
  A
• 
  B
• 
  C
• 
  D

Essential amino acids are those amino acids which

• Body can not synthesize A
• Body can synthesize B
• α-amino acids C
• β-amino acids D

Coordinate covalent bond is present in the molecules

• H₂O A
• BF₃ B
• SiO₂ C
• SO₂ D

The total number of orbitals in a shell with principal quantum number 'n' is

• 2n A
• 2n² B
• n² C
• n + 1 D

Cannizzaro reaction is not given by

• Trimethyl acetaldehyde A
• Acetaldehyde B
• Benzaldehyde C
• Formaldehyde D

• Forward reaction is favoured A
• Backward reaction is favoured B
• No effect C
• None of the above D

Which element does not belong to 4d series

• Y A
• Zr B
• Mo C
• Zn D

Butyric acid was named from butyrum means:

• Red out A
• Vinegar B
• Butter C
• Milk D

Solutions containing relatively lower concentrations of solute are called :

• Concentrated solutions. A
• Lighter solutions. B
• Dilute solutions. C
• None of above. D

NaBH₄and LialH₄are

• Ionic hydrides A
• Covalent hydrides B
• Interposal hydrides C
• Complex hydrides D

For a gas obeying Boyle's law if pressure is doubled, the volume becomes :

• Remain constant A
• Double B
• One half C
• None of above D

Which statement is incorrect about standard hydrogen electrode

• Its oxidation and reduction potential is zero A
• It consists of Pt wire dipped on 1 molar HCI solution B
• The electrolyte is 1 molar NaOH solution C
• H₂gas is passes in it at 1 atmospheric pressure D

Splitting of spectral lines when atoms are subjected to strong electron field is called

• Zeeman effect A
• Stark effect B
• Photoelectric effect C
• Compton effect D

Which if the following has the highest freezing point at one atmosphere

• 0.1 M NaCI A
• 0.1 M sugar solution B
• 0.1 M BaCI₂ C
• 0.1 M FeCI₂solution D

Which statement is incorrect for balancing of redox reactions by ion-electron method

• The reaction is splitted into two half reactions A
• H₂O and H⁺ions are added for acidic or neutral reaction to balance O and H atoms B
• To balance H, HCi, is added C
• To balance O and H in the alkaline reaction OH^-added D

Which property is not present in non-methals

• Predominantly covalent A
• Poor conductor B
• Hig E.N. value C
• High electropositivity D

Positive particle in discharged tube is produced by ionization of gas molecules, which is caused by

• Gas molecules collide with anode A
• Gas molecules are at high temperature B
• Gas molecules produce X-rays C
• Cathode rays remove electrons from gas molecules D