ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Cuprous ore among the following is

• Chalcopyites A
• Azurite B
• Cuprite C
• Malachitre D

Electron affinity of sulphur is

• More than O and Se A
• More than O but less than Se B
• Less than O but more than Se C
• Equal to O and Se D

Picric acid is

• 2, 4, 6-Trinitrotoluene A
• 2, 4, 6-Tribomoethanol B
• 2, 4,6-Trinitrophenol C
• Para-Nitrophenol D

What is the packet of energy called?

• Electron A
• Photon B
• Positron C
• Proton D

The raw materials for the manufacture of urea fertilizer is

• Hydrogen and ammonia A
• Steam, methane, ammonia B
• Methane and air C
• None of these D

In gases and liquids, temperature is the measure of :

• Average transnational kinetic energies of molecules. A
• Average vibrational kinetic energies of molecules. B
• Average rotational kinetic energies of molecules. C
• None of above D

Iodoethane reacts with sodium in ether, the product formed is

• Pentene A
• Propyne B
• Butene C
• Butane D

The process in which the solvent molecules are surrounded and interact with solute ions or molecules is called

• Solvation A
• Hydration B
• Hydrogenation C
• None D

The sum of mole fractions (X) of components of solution is equal to

• 100 A
• 200 B
• One C
• Zero D

Every sample of matter with uniform properties and a fixed composition is called a :

• Solid A
• Liquid. B
• Phase. C
• Gas. D

The oxidation number of each element of group ll-A is

• 0 A
• +1 B
• +2 C
• -1 D

Tetraethyle lead causes disease:

• Typhoid A
• Respiratory B
• Stomach C
• Muscular D

• Shift reaction toward forward direction A
• Shift reaction backward B
• Lower the value of K_c C
• No change in reaction D

The net heat in a chemical reaction is same, whether it is brought about in two or more different ways in one or several steps. It is known as

• Henry's law A
• Joule's princile B
• Hess's law C
• law of conservation of energy D

The process in which one s and two p orbitals mix up with each other is called

• Sp-hybridization A
• Sp²-hybridization B
• Sp³-hybridization C
• Dsp²-hybridization D

Cannizzzaro's reaction is not given by:

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

Hydrogenation of vegetable oils is accelerated by Ni catalyst. The catalytic activity of Bi is increased by a promoter of activator which is

• Na and K A
• Na and Hg B
• Hg and Zn C
• Cu and Te D

• First order A
• Pseudo first order B
• Second order C
• Zero order D

In the electronic configuration of Cr one electron from 4s sub-shell is transfered to 3d sub-shell because

• The 3rd orbital is of lower energy than 4s A
• The 4s orbital is of equal energy to 3d orbital B
• The half filled d-subshell is more stable than incomplete d-sub shell C
• 6 unpaired electrons make Cr more paramagnetic D

Hydrocarbons contain

• C and S only A
• C and H only B
• C, H, and O only C
• C, H, O and N only D

Chemical equilibrium involving reactants and products in more than one phase is called

• Static A
• Dynamic B
• Homogeneous C
• Heterogeneous 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

A compound of the formula C₄H₁₀O_{reacts with sodium and undergoes oxidation to give a carbonyl compound which does not reduce Tollen's reagent, the original compound is}

• Diethyl ether A
• n-Butyl alcohol B
• Isobutyl alcohol C
• sec-Butyl alcohol 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

When a nitrogeneous base combine with a sugar it is called

• Ribose A
• Nucleotides B
• Nucleoside C
• None D

The coinage metals are

• Ni, Pd, Pt A
• Cu, Ag, Au B
• Zn, Al, Pb C
• Fe, Si, Sn D

When a metal is dipped in 1 molar of its solution at 298 K. then potential set up is called

• Standard electrode potential A
• Electric charge B
• Ionization potential C
• Electroplating D

The gases can be converted into liquids by:

• Increasing the pressure only. A
• Lowering temperature and increasing pressure B
• Increasing pressure and bringing temperature below critical points C
• Lowering temperature only D

• 2-bromo-3-methylbutane A
• 3-methyl-2-bromobutane B
• 2-methyl-3-bromobutane C
• All of these D

Which can be used for dehydration of alcohol

• P₄O₁₀ A
• H₂SO₄ B
• H₃PO₄ C
• All of them D