Chemical Effects of electric Current

Which of the following is inflammable Substances?

• Petrol

• Wood

• Paper

• Straw

When a cracker is ignited, a sudden reaction takes place with the evolution of heat, light and sound. Identify the type of combustion?

• Explosion

• Random combustion

• Rapid combustion

• Spontaneous combustion

Which of the following liquid is not a good conductor of electricity?

• Orange juice
• Tap water
• Vinegar
• Honey

When magnesium ribbon burnt it produce

• Magnesium hydroxide

• Magnesium oxide

• Magnesium chloride

• Magnesium sulphate

An electric current can produce

• heating effect only.

• chemical effect only.

• magnetic effect only.

• chemical, heating, and magnetic effects.

Tags

NGSS.HS-PS2-5

Which one of the following solutions will not conduct electricity?

• lemon juice

• vinegar

• tap water

• toothpaste

The substances which have very low ignition temperature will

• Catch fire easily

• Will not catch fire

• Catch fire after some time

• None of these

Tick the chemical effect of elecric current

• boiling

• motion

• electro shock

• Electroplating

Which of the following statements is incorrect about the conductivity of water?

• Rain water is a good conductor of electricity.

• On addition of table salt, water conducts electricity.

• On addition of lemon juice, water conducts electricity.

• Tap Water is a bad conductor of electricity

When current is passed through a mixture of water and lemon juice, bubbles rise from one of the electrodes. The bubbles are rising from the solution because

• of the heating effect of current
• of the chemical effect of current
• current produces magnetic field around the electrodes
• current always produces air bubbles when passed through a liquid