ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Equal masses of methane and oxygen are mixed in an empty container at 25°CThe fraction of total pressure exerted by oxygen is :

• 1/2 A
• 8/9 B
• 1/9 C
• 16/17 D

3.6% WN solution of HCI has the molairity

• 1.0 A
• 1.15 B
• 0.98 C
• 1.98 D

Which of the following cannot conduct electricity :

• NaCl fused. A
• NaCl(aq)
  B
• NaCl(Solid)
  C
• Both (b) and (c) D

The heat energy change during a chemical reaction at constant pressure and at a given temperature is called

• Change in internal energy A
• Enthaply change B
• Temperature change C
• Work done by the system D

Which of the following is the simplest form of matter?

• Gaseous state A
• Liquid state B
• Solid state C
• All of above D

Which of the following is not a hydrocarbon

• Butane A
• Methyl benezene B
• Acetylene C
• Glucose D

• Pent -1-ene-3-yne A
• 2-pentyne-4-ene B
• 1-pentene-3-yne C
• Pent-2-yen-4-ene D

A solution can be

• Dilute and concentrated A
• Saturated and dilute B
• Saturated and unsaturated C
• Supersaturated and saturated D

Setting time of cement is controlled by adding

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

In the chemical combination of sodium and hydrogen to form NaH:

• Hydrogen atom gains an electron. A
• Sodium atom gains an electron. B
• Both the atoms share the electron. C

Ketons are prepared by the oxidation of

• Primary alcohol A
• Secondary alcohol B
• Tertiary alcohol C
• None of these D

Macro-nutrients are required in quantities ranging from

• 5 kg - 200 kg A
• 2 kg - 100 kg B
• 1 kg - 50 kg C
• 10 kg - 100 kg D

Protein may have

• Primary structure A
• Secondary structure B
• Tertiary structure C
• All of these D

Selection of filter paper depends upon sizes of particles to be:

• Tested A
• ^Filtered B
• Checked C
• All of above D

pH of 0.1 molar HCl solution is

• 1 A
• zero B
• 13 C
• 14 D

Which compound does not show hydrogen bonding with water

• CH₃OH A
• C₂H₅OH B
• CH₃- O - CH₃ C
• C₆H₅OH D

Down's cell is used to prepare

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

Which of the following is a not typical transition element

• Cr A
• Mn B
• Zn C
• Fe D

Water pollution is mainly due to

• Sulphure dioxide A
• Carbon dioxide B
• Oxygen C
• Industrial discharges D

Which of the following expressions show a heterolytic bond fission

• 
  A
• 
  B
• 
  C
• 
  D

• K_p> K_c A
• K_c> K_p B
• K_p= K_c C
• None of these D

An organic acdi having molecular formula C₂H₄O₂is

• Formic acid A
• Acetic acid B
• Oxalic acid C
• Propionic acid D

Gypsum is applied to the soil to provide calcium and

• Oxygen A
• Nitrogen B
• Phosphorous C
• Sulphur D

The most stable phosphorus allotrope is

• White A
• Red B
• Black C
• All D

The fractions obtained from fractional distillation of petroleum are placed in increasing order of their boiling points. Which order is correct

• Natural gas, petroleum ether, gasoline kerosene A
• Petroleum ether, kerosene, natural gas, petroleum ether B
• Gasoline, kerosene, natural gas, petroleum ether C
• Kerosene, gasoline, petroleum ether, natural gas D

Mild oxidation of glycerol with H₂O₂/FeSO₄gives

• Glyceraldehyde A
• Dihydroxy acetone B
• Glycerose C
• None D

An excess of aqueous silver nitrate is added to aqueous barium chloride and precipitate is removed by filtration. What are the main ions in the filtrate

• 
  A
• 
  B
• 
  C
• 
  D

In formadaldehyde and KOH are heated then we get

• Acetylene A
• Methane B
• Methyl alcohol C
• Ethyl formate D

The strongest hydrogen bond is in

• HF A
• HCl B
• HBr C
• Hl D

Which is the formula of tetra-ammine chloronitro platinum (VI) sulphate?

• [Pt(NH₃)₄(NO₂)]SO₄ A
• [PtNO₂Cl(NH₃)₄]SO₄ B
• [PtCl(NO₂)(NH₃)₄]SO₄ C
• [Pt(NH₃)₄(NO₂)Cl]SO₄ D