Science Practice Quiz 10

Q1.Reactions in which heat is given out along with the products are known as what type of reactions?

A. Endothermic reactions B. Decomposition reactions C. Exothermic reactions D. Displacement reactions

Q2.What occurs in a displacement reaction?

A. Two different atoms or groups of atoms (ions) are exchanged. B. A single substance decomposes into two or more substances. C. An element displaces another element from its compound. D. Two or more substances combine to form a new single substance.

Q3.What is the defining characteristic of a double displacement reaction?

A. Energy is absorbed from the surroundings. B. Insoluble salts are always produced. C. Two different atoms or groups of atoms (ions) are exchanged. D. An element loses oxygen or gains hydrogen.

Q4.Based on the provided text, which statement correctly defines oxidation?

A. Oxidation is the loss of oxygen or gain of hydrogen. B. Oxidation is the gain of oxygen or loss of hydrogen. C. Oxidation is the exchange of ions between two compounds. D. Oxidation is the formation of an insoluble salt.

Q5.Which of the following is a characteristic outcome of precipitation reactions?

A. Heat is always absorbed. B. A single substance decomposes. C. Insoluble salts are produced. D. An element displaces another element.

Q6.In the refining of silver, which metal is mentioned as being used to displace silver from silver nitrate solution?

A. Zinc B. Iron C. Copper D. Aluminium

Q7.According to the provided text, oxidation is explained in terms of which of the following?

A. Gain of hydrogen B. Loss of electrons C. Gain of oxygen D. Loss of protons

Q8.A shiny brown coloured element ‘X’ on heating in air becomes black in colour. What is element ‘X’?

A. Iron B. Silver C. Copper D. Gold

Q9.Why do we apply paint on iron articles?

A. To enhance their electrical conductivity B. To increase their melting point C. To prevent corrosion D. To make them heavier

Q10.Why are oil and fat containing food items flushed with nitrogen?

A. To increase their shelf life by preventing rancidity B. To make them more nutritious C. To improve their taste D. To reduce their weight

Sign in with Email

Science Practice Quiz 10