8KB - Revision

An ice block floats in water. Give reason.

• Volume increases

• Volume decrease

• Density increases

At what temperature does water change into ice ?

• Zero degree

• 100 degree

• 10 degree

Which of the chemical substance given below is added to food material for enhancing taste?

• Erythrosine

• Vanillin

• Tartrazine

Which chemical substance is added to soft drinks to give sour taste?

• Phosphoric Acid

• Citric Acid

• Nitric Acid

The mixture of Kerosine and water is a heterogeneous mixture.Do you agree with this statement?

• Agree

• Disagree

Which of the following are colloids?

(Muddy water , Sugar solution , Milk , Fog )

• Milk , Fog

• Muddy water , Sugar solution , Milk ,

• Muddy water , Sugar solution

The cell used in the mobile phone is ------------------------

• Dry cell

• Lithium ion cell

• Nickel cadmium cell

• Mercury cell

The type reactions to which the neutralisation reaction between Sodium hydroxide and Hydrochloric acid belongs to is

• Endothermic

• Exothermic

• Absorbs light

• Emits light

The particles which can exist independently stable in a substance is -------------

• Atom

• Molecule

• Ion

• Proton

Monomer of Rubber

• Ethene

• Isoprene

• PVC

• Melamine