Allied I chemistry I

The compound which contain both ionic and covalent bonds are

• CHCl3 and CCl4

• KCl and AlCl3

•  KCN and NaOH

• H2 and CH4

Which one of the following is an anionic ligand?

• Cl-

• NH3

•  H2O

• CO

Nucleophiles are

• Nucleus hating agent

• Nucleus loving species

• Electron hating agent

  
  

•  Electron loving species

The unit of specific conductance is ______.

• Ohm -1 cm 2 mol -1

• ohm -1 cm -1

• ohm -1

• mho

The pH  of  saliva is

• 9.0 to 10

• 4.0 to 4.5

• 6.5 to 7.6

• 7.8 to 8.2

The process of heating a liquid mixture to form vapours and then cooling the vapours to get pure component is called __________

• a) Chromatography 

• b) Distillation

• c) Crystallization

• d) Sublimation

Fractional distillation is different from distillation because of the presence of _

• a)  Condenser 

• b) Fractionating column

• c) Distillation flask

• d) Conical flask

The percentage of nitrogen in urea is --------  

• a) 46.6

• b) 42.5

• c) 44.2

• d)  40.1

The dye which is used as black dye in hair dye formulation is _____

• a) Fluorescein

• b) Phthalien

• c)Eriochrome Black T

• d)  melanin

Which one of the following play major role in structure of protiens and DNA

• (a) Hydrogen bonding

• (b) Metallic bonding

• (c) Covalent bonding  

• (d) Ionic bonding