ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

All elements of group VI-A non-metal except

• Te A
• S B
• Se C
• Po D

Which is the most volatile compound

• Hl A
• HCl B
• HBr C
• HF D

Benzene is obtained by fractional distillation of

• Heavy oil A
• Anthracene oil B
• Middle oil C
• Light oil D

Ionization energy does not increase?

• With small atomic radius of atom A
• If increase in no of electronic shells B
• By increase in proton no of atom C
• None of these D

The paper is derived from the name of which seedy plant?

• Rose A
• Sun flower B
• Papyrus C
• Water Hyacinth D

Which one of the following is a colligative property?

• Surface tension A
• Osmotic pressure B
• Viscosity C
• Refractive index D

In which of the following theories the hybridizationis considered

• Vsepr A
• Lewis B
• Molecule orbital C
• Valence bond D

Which of these polymers is a synthetic polymer

• Animal fat A
• Starch B
• Cellulose C
• Polyester D

Purine derivative among the following bases is

• Thymine A
• Uracil B
• Guanine C
• Cytosine D

Elements in the same family have

• Same atomic number A
• Molecular wt same B
• Same chemical properties C
• Same electronic configuration D

The strength of economy of a country is measured with respect to production of

• Medicines A
• Cement B
• Fertilizers C
• Paper D

The percentage of nitrogen in ammonia is

• 80% A
• 82% B
• 90% C
• 50% D

Alcohols are derivatives of:

• Benzene A
• Alkanes B
• Alkens C
• Alkynes D

Acidic hydrolysis of acetamide gives

• Acetaldehyde A
• Acetic acid B
• Methyl amine C
• Formic acid D

Colour of fluorine gas is

• Pale yellow A
• Greenish yellow B
• Red brown C
• greyish black D

The molecules of CO_{2 in dry ice from the :}

• Ionic crystals A
• Coverlet crystals B
• Molecular crystals C
• Any type of crystals D

Glacial Acetic acid is

• Pure acetic acid at 100°C A
• Acetic acid mixed with methanol B
• Pure acetic acid at 0°C C
• Pure acetic acid above 16.6°C D

• Zero A
• 253 sec B
• 150 sec C
• 500 sec D

Ozone hole is maximum over

• Europe A
• Antarctica B
• Asia C
• Africa D

According to Mendleev, the physical and the chemical properties are the periodic function of their

• Atomic number A
• Atomic mass B
• Atomic wt C
• None D

Aldehydes can be distinguished from ketones by using

• Schiff's reagent A
• Conc. H₂SO₄ B
• Anhy. ZnCl₂ C
• Resorcinol D

Which property is not present in lipids?

• Liquid A
• Solid or semi solid B
• Soluble in water C
• Form emultion D

When the rate of reaction is entirely independent of the conc. of reaction molecules then order of reaction is

• Zero A
• First B
• Second C
• Third D

In the modern periodic table the elements are placed in the ascending order of their

• Atomic masses A
• Melting points B
• Boiling points C
• Atomic numbers D

When a system absorbs energy, the sign of delta E is

• Neither positive nor negative A
• Negative B
• Positive C
• None of above D

Ionic hydrides are generally

• Liquid at room temperature A
• Good electrical conductors B
• Good reducing agents C
• Easily reduced D

Which of the following compound is known as oil of winter green?

• Phenyl benzoate A
• Phenyl salicylate B
• Phenyl acetate C
• Methyl salicylate D

Arenes are also called

• atom A
• hydrocarbons B
• aromatic C
• benzene D

Effective magnetic moment of Sc³⁺ion is

• 1.73 A
• 0 B
• 5.92 C
• 2.83 D

Which one of the following substance is use as decolonizing agent

• Asbestos A
• Animal charcoal B
• conc, H₂SO₄ C
• Silica gel D