Science Practice Quiz 1

Q1.Which of the following daily life situations is explicitly mentioned in the text as an example where a chemical reaction has taken place?

A. Water boiling and turning into steam. B. Melting of ice into water. C. Grapes getting fermented. D. Cutting a piece of wood.

Q2.According to the provided text, what is a crucial safety measure to be taken by students when performing the activity of burning a magnesium ribbon?

A. Performing the activity in a dark room. B. Ensuring the magnesium ribbon is wet before burning. C. Wearing suitable eyeglasses. D. Using bare hands to hold the ribbon.

Q3.What preparatory step is instructed for a magnesium ribbon before it is burned in Activity 1.1?

A. Soaking it in water for an hour. B. Cleaning it with sandpaper. C. Heating it gently over a low flame. D. Coating it with oil to prevent rust.

Q4.What is the fundamental characteristic of a chemical change, as described in the context of daily life situations in the text?

A. The substance changes its state but retains its identity. B. The initial substance changes its nature and identity. C. The substance always becomes lighter in weight. D. The substance always releases heat.

Q5.In Activity 1.1, after burning the magnesium ribbon, what is specifically instructed to be collected in a watch-glass?

A. Unburnt magnesium. B. Water vapor. C. The ash so formed. D. Sandpaper residue.

Q6.Who is attributed with the quote, 'Facts are not science — as the dictionary is not literature,' in the provided text?

A. Albert Einstein. B. Marie Curie. C. Martin H. Fischer. D. Isaac Newton.

Q7.Which gas is formed by the action of dilute sulphuric acid on zinc?

A. Oxygen B. Nitrogen C. Hydrogen D. Carbon dioxide

Q8.According to the provided text, which of the following is NOT listed as an observation that helps determine if a chemical reaction has taken place?

A. Change in state B. Change in colour C. Evolution of a gas D. Change in density

Q9.When dilute hydrochloric acid is added to zinc granules in a conical flask, what observation related to temperature is suggested by the activity instructions?

A. A significant decrease in temperature B. No change in temperature C. A change in its temperature D. The flask becomes extremely cold

Q10.In a chemical word-equation, what are the substances that undergo chemical change called?

A. Products B. Catalysts C. Reactants D. Solvents

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Science Practice Quiz 1