ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

What are non-metals?

• Sb & Bi A
• P & Bi B
• N & P C
• As & N D

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

• 10 A
• 14 B
• 28 C
• 30 D

The normal amount of overhead ozone is about

• 250 Du A
• 300 DU B
• 350 DU C
• 400 DU D

Tungsten and uranium are turned to an reaction with HNO₃

• Oxides A
• Chlorides B
• Nitrides C
• Nitrates D

Specific gravity of HNO₃ is

• 1.35 A
• 1.53 B
• 1.39 C
• 1.93 D

When a carbon atom forms single bonds with other carbon atoms, these hybrid orbitals overlap with the orbitals of hydrogen to form four bonds which are

• Three sigma and one P_i A
• Two sigma and two P_i B
• One sigma and three P_i C
• sigma D

A 4f orbital has

• one node A
• two node B
• three node C
• four nodes D

A macroscopic property of a system which describes the initial and final state of the system is called

• Physical property A
• Chemical property B
• Energy property C
• State function D

For which mechanisms, the first step involved is the same:

• E₁ and E₂ A
• E₂and SN₂ B
• E₂ and E₁ C
• E1 and SN₁ D

• 32 g A
• 3.2 g B
• 5.6 g C
• 9.6 g D

Platinum (IV) chloride combines with ammonia to form compounds in which the coordination number of the platinum is 6. A formula unit on one of the compound contains a cation and only two chloride ions. What is the formula of this compound

• Pt(NH₃)₆CI₄ A
• Pt(NH₃)₅CI₄ B
• Pt(NH₃)₄CI₄ C
• Pt(NH₃)₃CI₄ D

Which of the following statements is most appropriate about effective nuclear charge? It depends upon

• The shielding constant A
• The atomic number B
• The charge on the nucleus C
• Both the nuclear charge and the shielding constant D

Hydrolysis of ethyl-acetate (ester) has order of reaction :

• 3 A
• 2 B
• 1 C
• 1 D

Quantity of heat evolved or absorbed during the reaction is measured according to the equation

• 
  A
• 
  B
• 
  C
• 
  D

Naphthalene, iodine and NH_{4 can :}

• Sublime. A
• Both (a) and (c). B
• Crystallize. C
• None of above. D

The colour of transition metal complexes is due to

• d-d transitions of electrons A
• Para magnetic nature of transition elements B
• Ionization C
• Loss of s-electrons D

Down's cell is used to prepare:

• Sodium carbonate A
• Sodium bicarbonate B
• Sodium metal C
• Sodium hydroxide D

Rectified spirit contains alcohol about:

• 80% A
• 85% B
• 90% C
• 95% D

Calculate the amount of charge flowing in 2 minute in a wire of resistance 10Ωwhen a potential difference of 20 V is applied

• 120 C A
• 240 C B
• 20 C C
• 4 C D

Simple sugars are :

• Monosaccharides A
• Disaccharides B
• Oligo saccharides C
• Trisaccharides D

Al³⁺is a symbol for aluminium

• Atom A
• Ion B
• Cation C
• Anion D

The order of the rate of diffusion of gases NH₃,SO₂, CL₂, and CO₂ IS :

• NH_{3 >}SO_{2 >}CL_{2 >}CO₂ A
• NH_{3 >}CO_{2 >}SO_{2 >}CL₂ B
• CL_{2 >}SO_{2 >}CO_{2 >}NH₃ C
• NH_{3 >}CO_2>CL_{2 >}SO₂ D

Which of the following is a natural polymer?

• Terylene A
• Polysaccharide B
• Nylon C
• Polyethene D

The product of the reaction between propanone and HCN is hydrolysed under acidic conditions. What is the formula of the final product

• CH₃CH(OH)COOH A
• CH₃CH₂CH(OH)COOH B
• (CH₃)₂C(OH)COOH C
• CH₃CH₂CH₂COOH D

The reaction of alcohol with SOCI₂in the presence of pyridine as catalyst gives

• Acids A
• Acid chloride B
• Alkyl halide C
• Benzene D

Reduction of aldehydes with HI and P gives

• Primary alcohols A
• Secondary alcohols B
• Alkanes C
• Tertiary alcohols D

Which of the following pair contains isomers of each other

• Propanoic acid and propanone A
• Acetone and acetaldehyde B
• Ethyl alcohol and diethyl ether C
• Methyl alcohol and dimethyl ether D

• A primary alcohol A
• A secondary alcohol B
• An eher C
• A phenol D

In ter-butyl alcohol, the tertiary carbon is bonded to

• Two hydrogen atoms A
• Three hydrogen atoms B
• One hydrogen atoms C
• No hydrogen atom D

The fibre which is obtained from naturally occurring proteins is called

• Saran A
• Azlon B
• Rayon C
• Nylon D