Which of the following statements is not true?

Which of the following does not belong to the group?

Which of the following materials is not soluble in water?

The property of a substance that decides whether it will float or sink in water is:

Select the odd one:

Name two translucent objects.

Mustard oil and grease both are insoluble in water, but mustard oil floats whereas grease settles down, why?

Define translucent materials. Give an example

What type of materials float on the surface of water? Give two examples

How is density of an object related to its floating or sinking?

What do you mean by the hardness of materials? Explain with an example

How can materials be classified on the basis of physical state?

You are provided with the following materialsturmeric, honey, mustard oil, water, glucose, rice flour, groundnut oil.
Make any three pairs of substances where one substance is soluble in the other and any three pairs of substances where one substance remains in soluble in the other substance.

Why is it easier to hold a steel tumbler with cold milk than the one with hot milk ?

A solid is put in a bucket of water. It floats just below the surface of the water. What do you think is the density of the object in relation to the density of water?

Kavita bought new silver anklets. After a month, she found that the anklets had lost their lustre and turned black. She had doubts that they were not made of pure silver. But her mother told her that they were of pure silver. She washed her silver anklets with lemon juice and found that the silver anklets had get the lustre back.
Read the above passage and answer the following questions.
(a) Do you think that the anklets are not of pure silver?
(b) Why silver anklets lost their lustre after some time?
(c) What values were shown by Kavita's mother?

(a) What do you understand by the term 'classification'?
(b) Differentiate between transparent and opaque materials. Give two examples for each.
(c) How can we make a normal paper translucent?

Chalk, iron nail, wood, aluminium, candle, cotton usually look different from each other. Give some properties by which we can prove that these materials are different.

Differentiate among opaque, translucent and transparent materials, by giving one example of each.