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NCERT Exemplar · Class 6 · Science

Chapter 4: Sorting Materials and Groups

Practice each question, then open the answer or worked solution.

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Very Short Answer Questions

4 questions
Q12Written answer

It was Paheli’s birthday. Her grandmother gave her two gifts made of metals, one old dull silver spoon and a pair of lustrous gold earrings. She was surprised to see the difference in the appearance of the two metals. Can you explain the reason for this difference? 

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Worked solution

Ans:  Her dull silver spoon reacted with gases like hydrogen sulphide and lost its shine in moist air. Whereas gold does not react with the gases present in the atmosphere as it is a noble metal.


Q13Written answer

Mixtures of red chilli powder in water, butter in water, petrol in water, and honey in water were given to Radha, Sudha, Sofia and Raveena, respectively. Whose mixture is in solution form? 

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Worked solution

Ans: Because honey and water are very soluble in each other, Raveena will receive the product in the form of a solution.


Q14Written answer

On a bright sunny day, Shikha was playing hide and seek with her brother. She hid behind a glass door. Do you think her brother will be able to locate her? If yes, why? If no, why not? 

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Worked solution

Ans: Yes, her brother will be able to locate Shikha because she is hiding behind a glass door that is transparent in nature. 


Q15Written answer

Take a small cotton ball and place it in a tumbler/bowl filled with water. Observe it for at least 10 minutes. Will it float or sink in water and why?

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Worked solution

Ans: At first the cotton ball will float in water because it is light weighted. But then it will slowly absorb water and become heavier, eventually will sink.