ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

To meet the due need of food by increasing population we must use in agriculture

• good seeds A
• pesticides B
• fertilizers C
• all D

Gooch crucible is made of:

• Brass A
• Porcelain B
• Bronze C
• .Gold D

A graph b/w P and 1/V at constant temperature and number of moles is parallel to :

• None of above A
• X-axis B
• Z-axis C
• Y-axis D

Which halogen will react spontaneously with Au(s)to produce Au3++

• Br2 A
• F2 B
• I2 C
• Cl2 D

Which of the following is not an air

• N₂ A
• N₂O B
• NO C
• CO D

• 8 g A
• 16 g B
• 32 g C
• 24 g D

Shape of CIO₃is

• Triangular pyramidal A
• Tetrahedral B
• Triangular planar C
• Triangular bipyramidal D

Inn which of these processes are small organic molecules made into macromolecules?

• The cracking of petroleum fractions A
• The fractional distilation of crude oil B
• the polymerization of ethane C
• The hydrolysis of proteins D

Functional group of ketones is:

• ---CHO A
• ---CO--- B
• ---C≡ N C
• ---COOH D

The electrolysis of CuSO₄aqueous solution using copper as cathode as well an anode the substance which deposits at cathode is

• H₂SO₄ A
• Oxygen B
• Copper C
• Hydrogen D

Setting time of cement is controlled by adding:

• Epsom A
• Gypsom B
• CaCO₃ C
• CaCl₂ D

The structure of ICI₂is

• Trigonal A
• Trigonal bipyramidal B
• Octahedral C
• Square planar D

Incomplete oxidation of alkanes yields

• CO₂& carbon black A
• CO₂+ heat B
• CO and carbon black C
• CO + heat D

How many cm³of 1 M H₂SO₄required to neutralize 10 cm³of 1 M NaOH

• 2 cm³ A
• 2.5 cm³ B
• 5 cm³ C
• 10 cm³ D

For which system does the equilibrium constant. K_c has units of

• 
  A
• 
  B
• 
  C
• 
  D

Which is a component of macronutrient?

• Zn A
• N B
• Mo C
• Cl D

Which of the following is complex?

• CaSO₄. 0.5H₂O A
• (C₆H₁₀O₅)_n B
• C₆H₁₂O₆ C
• CH₄ D

Which on of the following compounds does not exist?

• NCl₅ A
• AsF₅ B
• SbCl₅ C
• PF₅ D

Radioactive element in halogens is

• Astatine A
• bromine B
• Iodine C
• Fluorine D

Replacement of Cl of Chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-Dinitrochlorobenzene is readily replaced because

• NO₂makes the electron rich ring at ortho and para positions A
• NO₂withdraws electrons at metaposition B
• NO₂donate electrons at m-position C
• NO₂withdraws electrons at ortho and para position D

Peroxyacetylnitrate (PAN) is an irritant to human beings and it affects:

• Eyes A
• Ears B
• Stomach C
• Nose D

The noble gas have

• Very low ionization energies A
• High boiling points B
• No electron pair interaction C
• No van Der Waal's forces D

Acetic acid is obtained when

• Methyl alcohol is oxidized with potassium permanganate A
• Calcium acetate is distilled in the presence of calcium formate B
• Acetaldehyde is oxidized with potassium dichromate and sulphuric acid C
• Glycerol is heated with sulphuric acid D

SO₂Makes ______ acid rains

• Carbonic acid A
• Sulfuric B
• Nitric acid C
• All of these D

B.O.D is connected with

• Organic matter A
• Microbes B
• Mircrobes and organic matter C
• None of the above D

The compounds or species in search of electrons are called

• Elctrophiles A
• Nucleophile B
• Nitrities C
• Bases D

• Pressure change A
• Temperature change B
• Concentration change C
• Catalyst D

SnCI₂have ______ shape

• Planner A
• Tetrahedral B
• Angular C
• None D

Which of the following mixture of liquids show negative deviation form Raults law

• Ethyl alcohol and ether A
• HCI and water B
• Phenol- water C
• Chlorobenene-bromobenene D

The sum of the exponents of the conc. terms in the rate equation is called

• Rate of reaction A
• Order of reaction B
• Specific rate constant C
• Average rate D