Tag: soluble and insoluble substances

Questions Related to soluble and insoluble substances

What are transparent materials?

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

  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.

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Correct Option: B
Explanation:

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

Example- a glass of water, clear eyeglasses.

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

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

  1. Opaque object

  2. Transparent object

  3. Lustrous object

  4. Translucent object

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Correct Option: D
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.

Which of the following substance is not transparent?

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

  1. Glass

  2. Pure Water

  3. Air

  4. Steel

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Correct Option: D
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.

Translucent substances  __________.

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

Show answer
Correct Option: B
Explanation:

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

Name two transparent materials. 

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

  1. Glass and wood

  2. Plastic and cold wax

  3. Plastic and glass

  4. Water and honey

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Correct Option: C
Explanation:

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

Example- Plastic, Glass.

How many of the following are soluble in water?
salt, sugar, sand, dust

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

  1. 1

  2. 2

  3. 3

  4. 4

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Correct Option: B

Which of the following type of bodies form sharp shadows when placed in the path of light?

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

  1. Transparent

  2. Translucent

  3. Transparent and translucent

  4. Opaque

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Correct Option: D
Explanation:

Transport bodies allow light to pass through it while translucent bodies allow light partially through it but opaque bodies do not allow light to pass through it, so they form sharp shadows when placed in the path of light.

Option (D) is correct.

Which of the following type of bodies form sharp shadows when placed in the path of light?

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

  1. Transparent

  2. Translucent

  3. Both A and B

  4. Opaque

Show answer
Correct Option: D
Explanation:
An opaque object is neither transparent (allowing all light to pass through) nor translucent (allowing some light to pass through). 

When light strikes an interface between two substances, in general, some may be reflected, some absorbed, some scattered, and the rest transmitted. 

Opaque object forms sharp shadow when placed in the path of the light.

Hence, option D is correct.

Select the objects which are opaque: 

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

  1. water, oil and soil

  2. soil, sand and dust

  3. glass, grass and gum

  4. marvel, oiled paper and magnet

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Correct Option: B
Explanation:

Opaque objects are materials which do not allow light to pass through them.

Examples are- Soil, sand and dust.

Pick one material which is completely soluble in water:

chemistry nature of things objects that float or sink substances that sink or float soluble and insoluble substances

  1. oil

  2. sawdust

  3. mud

  4. alum

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Correct Option: D
Explanation:

Alum is a hydrated double salt sometimes used as water purifier is completely soluble in water.