Tag: nature of things

Quizzes (10) Questions (75)

Questions Related to nature of things

Multiple choice evs nature of things objects that float or sink substances that sink or float soluble and insoluble substances

Ayesha saw that the first puri ____________ to the bottom of the pan; as it puffed up, it started ____________ on the oil.

  1. float, to sank

  2. sank, floating

  3. reached, floating

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

At first the density of puri is higher than oil so it sinks and then after puri gets filled with air (the air being lighter than oil) which makes to float in oil.

Multiple choice evs nature of things objects that float or sink substances that sink or float soluble and insoluble substances

The density of brass on CGS system is 8.4 $ \displaystyle g/cm^{3} $. Its density in SI system is:

  1. 8.4 $ \displaystyle kg/m^{3} $
  2. 84 $ \displaystyle kg/m^{3} $
  3. 840 $ \displaystyle kg/m^{3} $
  4. 8400 $ \displaystyle kg/m^{3} $
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

SI Unit of density is $ Kg/m^3 $.

So, $8.4  g/cm^3 $ = $8.4 \times 1000 = 8400  kg/m^3 $.
Option D.

Multiple choice evs nature of things objects that float or sink substances that sink or float soluble and insoluble substances

The following is the characteristic property of a substance:

  1. density

  2. volume

  3. weight

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Density is a characteristic property because it does not change with the varying amount of the substance. No matter how big or small a piece of the substance you have, it will always be the same density because it is the same material.

Multiple choice evs nature of things objects that float or sink substances that sink or float soluble and insoluble substances

Take 2 glasses $A $ and $B$ and put tap water in $A$ and salt water in $B$. Now add 1 egg in each. In which of the glass, an egg will sink?

  1. $A$
  2. $B$

  3. Both

  4. None of them
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Salt water is denser than fresh water. So, if we put egg in salt water the egg floats and if we put egg in tap water the egg will sink.

Multiple choice evs nature of things objects that float or sink substances that sink or float soluble and insoluble substances

What are transparent materials?

  1. The material which does not allow light to pass through it.

  2. The material which allows light to pass through it.

  3. The material through which light can pass partially.

  4. None of these.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Materials which allow light to completely pass through them without getting scattered are called Transparent material.

Example- a glass of water, clear eyeglasses.

Multiple choice evs nature of things objects that float or sink substances that sink or float soluble and insoluble substances

What do you call a substance through which things are partially visible?

  1. Opaque object

  2. Transparent object

  3. Lustrous object

  4. Translucent object
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The material which does not allow light to pass through it is called opaque and material which allows light to pass through it is called transparent. The material through which light can pass partially is called translucent, e.g. butter paper.

Multiple choice evs nature of things objects that float or sink substances that sink or float soluble and insoluble substances

Which of the following substance is not transparent?

  1. Glass

  2. Pure Water

  3. Air

  4. Steel
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Transparent material:- Materials which allow light to completely pass through them without getting scattered are called Transparent material.

Example- a glass of water, clear metal-containing.
Steel does not allow to pass light through it hence is an opaque object.

Multiple choice evs nature of things objects that float or sink substances that sink or float soluble and insoluble substances

Translucent substances  __________.

  1. allow the light to pass through it completely

  2. allow the light to pass through it partially

  3. does not allow the light to pass through it

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Those materials that allow some light to pass through them are called translucent and include things like frosted glass and wax paper.