ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Group VIB of transition elements contains

• Zn, Cd, Hg A
• Fe, Ru, Os B
• Cr, Mo, W C
• Mn, Te, Re D

The Mn³⁺has ______ color

• Violet A
• Green B
• Red/brown C
• No color D

Alcohols, phenols and ethers may be considered as derivative of

• Hydrocarbons A
• Benzene B
• Carboxylic acid C
• Water D

Who gave the concept of atomic number

• Newton A
• Mosley B
• Dalton C
• Newland D

1, 3-Dibromopropane reacts with metallic zinc to form

• Propene A
• Propane B
• Cyclopropane C
• Hexane D

Which of the following is not affected by light

• 
  A
• 
  B
• 
  C
• 
  D

Noble gases in the atmosphere are

• 4% A
• 3% B
• 2% C
• 1% D

• 
  A
• 
  B
• 
  C
• 
  D

The treatment of benzene with isobutene in the presence of sulphuric acid give

• isobutyl benzene A
• tert-Butyl benzene B
• n- Butyl benzene C
• no reaction D

Which term was derived from "aroma":

• Atom A
• Hydrocarbons B
• aromatic C
• aliphatic D

Alkaline earth metals posses two electrons in their outermost

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

Carboxylic acid can generally be prepared by various methods. Which of the following methods is not suitable for making carboxylic acids

• By the oxidation of primary alcohols A
• By the hydrolysis of nitriles B
• By the carbonation of Grignard, reagent C
• By the hydrolysis of p-amines D

The vapour pressure of two liquids 'p' and 'Q' are 80 and 60 torr respectively. The total vapour pressure of solution obtained by mixing 3 mole of P and 2 mol of Q would be

• 140 torr A
• 20 torr B
• 68 torr C
• 72 torr D

Which is a component of macronutrient?

• Zn A
• N B
• Mo C
• Cl D

The period table contains elements in vertical column. these vertical column are called

• Groups A
• Periods B
• Blocks C
• Sub group D

The basic difference between synthetic and natural fertilizer is in their

• Rae material A
• Crop application B
• Usage C
• Shapes D

The only alcohol that can be prepared by the indirect hydration of alkene is

• ethyl alcohol A
• propyl alcohol B
• isobutyl alcohol C
• methyl alcohol D

Which of the following acts as ligand

• NH₃ A
• NH₂-- CH₂-- CH₂-- NH₂ B
• C₂O^2-₄ C
• All these D

The most reactive compound for electrophilic nitration will be

• Benzyl chloride A
• Benzoic acid B
• Nitrobenzene C
• Chlorobenzene D

• 
  A
• 
  B
• 
  C
• 
  D

In a compound an atom has negative oxidation state because

• Atom is negatively charged A
• Atom acts as cathode B
• Atom is more electronegative C
• Atom has lowest ionization energy D

The empirical formula of benzene is determined by

• IR spectra A
• U.V B
• Elemental analysis C
• NMR spectra D

The charge over mass ratio of electron is:

• 1.6 x 10^-1 C Kg^-1

  A

• 9.1 x 10^-31 C Kg^-1

  B

• 1.7588 x 10¹¹ C Kg^-1

  C

• 6.62 x 10^-34 C Kg^-1

  D

Soft drinks and baby feeding bottles are generally made up of

• Polyester A
• Polyurethane B
• Polyurea C
• Polystyrene D

Which compound out the following is used in berthing equipment as it absorbs CO2 and gives out O at the same time.

• Na2O2 A
• KO2 B
• MgO C
• BaO D

White phosphorus is

• A mono atomic gas A
• P₄, a tetrahedral solid B
• P₈, a crown C
• A linear diatomic molecule D

SO₂and NO₂produce pollution by increasing

• Alkalinity A
• Acidity B
• Neutrality C
• Buffer action D

Which of the following compounds on boiling with KMnO₄(alk) and subsequent acidification will not give benzoic acid?

• Benzyl alcohol A
• Acetophenone B
• Anisole C
• Toluene D

Ethyl alcohol may be identified by

• Ring test A
• Iodoform test B
• Tollen's test C
• Bazeyer's test D

Allotropic forms of sulpher are

• Two A
• Three B
• Four C
• Five D