G8 TOS Set 1

When zinc Granules are dropped in a breaker hydrochloric acid, _______ gas is produced

• Hydrogen

• Oxygen

• Nitrogen

• CO2

The chemical formula of rust is

• Fe2O3

• Fe3O4

Ferrous sulphate is _____ in colour

• Blue

• Green

When NaCl reacts with AgNO3 solution, there is a formation of white insoluble precipitate of ___________

• Silver chloride

• Sodium sulphate

The precipitates of ferrous hydroxide Fe(OH)2, are ______ in colour

• Blue

• White

• Green

Ammonium chloride is a _____ compound

• Solid

• Semi solid

When sodium goes in contact with water, it reacts vigorously to give __________ and hydrogen gas. There fore metals like Sodium and potassium are stored under kerosene to prevent outer reaction with moisture/water and oxygen.

• Sodium hydroxide

• Sodium oxide

When iron follings are added to sulphur powder _______ is formed which shows no effect with magnet.

• Iron sulphide

• Iron sulphate

Select all Photochemical reactions

• Photosynthesis

• Decomposition of AgCl

• Both

• None

Which of the following substances can be added to acidity water to conduct electricity

• Salt such as NaCl

• Sugar

• Lemon

• Vinegar

• Methane