Chemistry

Polyester resins have special use in:

• Clothing A
• Paints B
• Emulsion C
• Floor covering D

What is going to replace the petroleum?

• Silica A
• Silicates B
• Silicones C
• Silicon D

In cold countries ethylene glycol is added to water in radiators of cars during winter. It results in

• Lowering in b.pt A
• Reducing viscosity B
• Reducing specific heat C
• Lowering in freezing pt D

Hydrides are:

• Ionic A
• Covalent B
• Intermediate C
• All above D

The quantum number which describes the shape of the orbital is

• Principle quantum number A
• Spin quantum number B
• Azimathal quantum number C
• Magnetic quantum number D

Which one o the following does not belong to alkaline earth metals?

• Be A
• Re B
• Ba C
• Rn D

Which of the following pairs are chemically dissimilar?

• Na and K A
• Ba and Sr B
• Zr and Hf C
• Ca and Zn D

When rate of forward reaction is equal to rate of backward reaction, then the equilibrium established is called

• Chemical equilibrium A
• Static equilibrium B
• Dynamic equilibrium C
• None of these D

An electric current is passed through silver voltameter connected to a water voltmeter. The cathode of the silver voltameter is 0.108 g more at the end of the electrolysis. The volume of oxygen evolved at STP is

• 56 cm³ A
• 550 cm³ B
• 5.6 cm³ C
• 11.2 cm³ D

Which of the following species has unpaired electrons in antibonding molecular orbitals

• 
  A
• 
  B
• 
  C
• 
  D

Cotton is an example of

• Animal fibre A
• Mineral fibre B
• Vegetable fibre C
• Synthetic fibre D

An oil or fat with no double bond have iodine number:

• Zero A
• 100% B
• 50% C
• minimum D

Wacker method involves the conversion of alkene using PdCl₂into corresponding

• Alcohol A
• Ketone B
• Aldehyde C
• Ether D

Alkanes containing carbon C₁₈ownwards are

• Gases A
• Liquids B
• Waxy solids C
• Solids D

Plaster of pares is obtained by heating

• Gypsum A
• Epsom B
• Lime stone C
• Dolomite D

Which is used to remove air bubbles form metals?

• B A
• Be B
• Mg C
• Al D

f-block elements are called :

• Alkali metal A
• Alkakline earth metals B
• Transition elements C
• Electron deficient elements D

The standard enthalpy change in the formation of 1 mole of a compound from its elements in their standard physical states is

• Enthalpy of formation A
• Enthalpy of atomization B
• Enthalpy of neutralization C
• Internal energy change D

Naturally occurring lipids are called

• Fats A
• protein B
• Steroids C
• None D

The number of electrons in the M shell of the element with atomic number 24 is

• 24 A
• 12 B
• 13 C
• 8 D

The percentage of H is the highest in

• CH₄ A
• NH₃ B
• H₂SO₄ C
• C₆H₁₂O₆ D

Which is the used as test for the presence of alkenes

• Reaction of cold dilute alkaline KMnO₄ A
• Combustion B
• Polymerization C
• Catalytic hydrogenation D

• Acidic amino acid A
• Basic amino acid B
• Neutral amino acid C
• None of these D

Phosphate pollution is caused by

• Weathering of phosphate rocks only A
• Agricultural fertilizers B
• Phosphate rocks and sewage C
• Sewage and agricultural fertilizers D

How many zones through which the charge passes in a rotary kiln

• 4 A
• 3 B
• 2 C
• 5 D

From the following values of dissociation constants of four acids which value represents the strongest acid?

• 2 x 10^-2 A
• 0.02 x 10^-1 B
• 3 x 10^-4 C
• 2 x 10^-4 D

Which of the following phosphorus is most reactive?

• Red phosphorus A
• White phosphorus B
• Scrlet phosphorus C
• Violet phosphorous D

In Bohr model of hydrogen atom the distance between adjacent orbits increases away from the nucleus, the energy difference between the orbits

• Increases A
• Decreases B
• Reaming same C
• Orbits coincide D

The hybirdization in benzene is:

• sp³ A
• sp² B
• sp² C
• dsp² D

A solution of glucose is 10% The volume to which 1g mole of it dissolved will be :

• 8.1 dm³
  A
• 1.7 dm³
  B
• 1.8 dm³
  C
• 6.1 dm³
  D