When electricity is passed through water, which of the following is released?
Oxygen
Hydrogen
Carbon dioxide
Both oxygen and hydrogen
Which of the following given below is an example of reversible change?
Evaporation of water
Cooking of food
Ripening of fruit
Blooming of flowers
When water freezes, its density
Increases
Decreases
Remains the same
None of the above
Cakes are made fluffy by adding
Yeast
Sodium bi carbonate
Both yeast and sodium bicarbonate
Lemon juice
Formation of curd from milk is a
Physical change
Chemical change
Both of the above
When sugar is added to water, to make a solution, sugar is called:
Solvent
Solute
Reactant
Product
Tearing of paper is a
What will happen to solubility with an increase in temperature?
May increase or decrease
Which of the following is a physical change?
Dissolving solid in water
Cooking food
Burning of paper
Rusting of iron
Rusting of iron is a
