ICSE-X HCl (Page 89,90,91)

Acid used in preparation of HCl gas

• Conc H2SO4

• Conc HNO3

What makes HCl polar covalent

• Ionisation potential

• Electron affinity

• Electronegativity

What factors doesn’t support preparation of HCl by synthesis

• Direct sunlight

• Diffused sunlight

• Moisture

HCl gas is collected by

• Downward displacement of air

• Upward displacement of air

Which of the following compounds cannot be used as drying agent in the laboratory preparation of HCl gas

• Conc H2SO4

• CaO

• P2O5

What special arrangement is done on apparatus to convert HCl gas to HCl acid

• Introducing empty flack between round bottomed flask and jar

• Introducing Woulfs’s bottle

• Inverted funnel fixed to the delivery tube

Why lower end of thistle funnel should be dip below the liquid level in flask

• To mixed reactants properly

• To release Conc H2SO4

• To prevent HCl gas formed to intervene with Acid

When thistle funnel is not dipped below the solution what actually happens to HCl gas due to H2SO4

• They both form mixture

• HNO3 is concentrated

• H2SO4 is concentrated

What happens in Woulfe’s bottle during laboratory preparation of HCl gas

• HCl gas is converted to HCl acid

• HCl is dried

Which of the following compound is formed as hard crust in laboratory preparation of HCl gas

• Na2SO4

• NaHSO4

• Na2CO3