Tag: evs

Questions Related to evs

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

Show answer
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

Show answer
Correct Option: B
Explanation:

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

Examples are- Soil, sand and dust.

Snakes dance to the tune of snake charmer because

evs snakes a snake charmer's story snakes and snake charmers uses of animals

  1. They are charmed by music.

  2. Snake charmers flute is very melodious.

  3. They are trained liked other pets.

  4. They change position with the change in position of the flute.

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Correct Option: D
Explanation:

  • The snakes have a poorly developed sense of hearing. 
  • So, it cannot hear the snake charmer's tune but moves along with the hands and other movements made by the snake charmer.

    Hence, the correct option is D.


Which of the following snake is poisonous?

evs snakes a snake charmer's story snakes and snake charmers uses of animals

  1. Cobra

  2. Krait

  3. Afai

  4. All of the above

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Correct Option: D
Explanation:
Venomous or poisonous snakes are species capable of producing venom (poison), which is used primarily for immobilizing prey and defense. It is mostly done via mechanical injection by fangs. The varieties of snake that most often cause serious snakebites depend on the region of the world. 
Africa- Mambas, Egyptian cobras, Puff adders and Carpet vipers
Middle East- Carpet ipers and Elapids
Central and South America- Bothrops and Crotalus 
In South Asia- Indian cobras, Common kraits, Russell's viper, Saw-scaled vipers (Afai snake) and Carpet vipers
So, the answer is D.

Poisonous sea-snakes possess a

evs snakes a snake charmer's story snakes and snake charmers uses of animals

  1. Compressed tail

  2. Printed tail

  3. Depressed tail

  4. Conical tail

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Correct Option: A
Explanation:

  • Sea snakes are very poisonous. The beaked sea snake is the most poisonous sea snake. They have flattened or compressed paddle-like or oar-like tails.
  •  This is the distinguishing feature of sea snakes. They have laterally compressed bodies.  

Thus, the correct answer is 'Compressed tail.'

Snakes are not found in Antarctica, Iceland, Ireland, Greenland and New Zealand because 

evs snakes a snake charmer's story snakes and snake charmers uses of animals

  1. They are cold blooded

  2. They are carnivores

  3. They have poisonous fangs

  4. None of the above

Show answer
Correct Option: A
Explanation:

Many carnivores are found in extremely cold areas.

Fangs are not affected by external temperatures hence they aren't contributing in the habitats of snakes.
They are cold blood or their inability to maintain a body temperature limits their existence to some areas having warm climates as they will not be able to survive in such extreme cold.
So the correct answer is 'They are cold blooded'.

Which of the following snakes is non-venomous?

evs snakes a snake charmer's story snakes and snake charmers uses of animals

  1. Cobra

  2. Krait

  3. Viper

  4. Python

Show answer
Correct Option: D
Explanation:

Python is non-poisonous snake. They are found in Africa, Australia and Asia. Pythons use their sharp backward curving teeth, four rows in the upper jaw, two in the lower to grasp prey which is then killed by constriction, after an animal has been grasped to restrain it, the python will quickly wrap a number of coils around it. Death occurs primarily via asphyxiation. 

Therefore, the correct answer is option D.