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Science Olympiad Mock Test - 1 - Class 6 MCQ


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30 Questions MCQ Test - Science Olympiad Mock Test - 1

Science Olympiad Mock Test - 1 for Class 6 2024 is part of Class 6 preparation. The Science Olympiad Mock Test - 1 questions and answers have been prepared according to the Class 6 exam syllabus.The Science Olympiad Mock Test - 1 MCQs are made for Class 6 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Science Olympiad Mock Test - 1 below.
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Science Olympiad Mock Test - 1 - Question 1

Which two signs should be interchanged to make the equation correct?

6 + (9 - 3) ÷ (8 + 1) × (7 - 4) = 24

Detailed Solution for Science Olympiad Mock Test - 1 - Question 1

After interchanging × and ÷,
We get
6 + (9 - 3) × (8 + 1) ÷ (7 - 4) = 6 + 6 x 9 ÷ 3 = 24

Science Olympiad Mock Test - 1 - Question 2

Look carefully for the pattern, and then choose which pair of numbers comes next.

42 40 38 35 33 31 28

Detailed Solution for Science Olympiad Mock Test - 1 - Question 2

This is an alternating subtraction series in which 2 is subtracted twice, then 3 is subtracted once, then 2 is subtracted twice, and so on.

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Science Olympiad Mock Test - 1 - Question 3

Pointing towards a girl, Sonu said, "She is the mother of my paternal grandfather's son." How is the girl related to Sonu?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 3

Grandfather's son means either son or uncle.
Mother of uncle or son is grandmother.

Science Olympiad Mock Test - 1 - Question 4

Diamond is the allotrope of which of the following materials?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 4

The atoms of carbon can be bonded together in different ways, termed 'allotropes of carbon'. The best known are graphite, diamond, and amorphous carbon. The physical properties of carbon vary widely with the allotropic form.  

Science Olympiad Mock Test - 1 - Question 5

In which of the following cases will regular reflection not take place when a beam of light strikes it?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 5

When a beam of light strikes an unpolished wooden surface, there will be a diffused reflection as an unpolished wooden surface is irregular, and not smooth.  

Science Olympiad Mock Test - 1 - Question 6

Which of the following statements is not true?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 6

Earthworms can breathe inside the soil. They come outside only when water takes the place of air in the soil.  

Science Olympiad Mock Test - 1 - Question 7

An electrician uses a screw-driver to repair the electric devices. The handle of a screw-driver is usually made of

Detailed Solution for Science Olympiad Mock Test - 1 - Question 7

The handle of a screw-driver is made of rubber or plastic, as rubber and plastic are bad conductors of electricity.  

Science Olympiad Mock Test - 1 - Question 8

Light is a form of energy produced by a

Detailed Solution for Science Olympiad Mock Test - 1 - Question 8

Light is a form of energy produced by a luminous object. An object is considered luminous if it emits its own light.  

Science Olympiad Mock Test - 1 - Question 9

An aqueous solution turns blue litmus solution red. The addition of excess of sodium hydroxide would reverse the change. What is the chemical nature of the solution before and after the addition of sodium hydroxide?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 9

An aqueous solution turns blue litmus solution red, it means the given solution is acidic in nature. Since sodium hydroxide is basic in nature, the excess addition of sodium hydroxide would change the nature of the solution to basic. Therefore, the basic solution turns red litmus solution to blue again.  

Science Olympiad Mock Test - 1 - Question 10

Which of the following is an ionically bonded molecule?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 10

Sodium chloride (NaCl) is the classic case of ionic bonding. The sodium chloride molecule is formed by the ionisation of sodium and chlorine atoms, and the attraction of the resulting ions.  

Science Olympiad Mock Test - 1 - Question 11

What is the cause of milkiness of limewater?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 11

Carbon dioxide passed into limewater gives a milky solution. This is due to the insoluble suspension of calcium carbonate formed. Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O(l)  

Science Olympiad Mock Test - 1 - Question 12

Shelly is drinking orange juice and finds it sour. Which acid makes the orange juice taste sour?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 12

Citric acid is responsible for the sour taste of orange juice.  

Science Olympiad Mock Test - 1 - Question 13

What is the other name of sundial, which was used to measure time in olden days?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 13

In olden days, shadows caused by objects placed in the sun were used to measure time. Such a device is called a sundial or Samrat Yantra. 

Science Olympiad Mock Test - 1 - Question 14

Which of the following is not an example of reversible change?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 14

Curdling of milk is an irreversible change because the product so obtained cannot be changed into its original form. Curd cannot become milk again.  

Science Olympiad Mock Test - 1 - Question 15

Which of the following can be separated by threshing?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 15

Threshing is the process of removing the grain of wheat or barley from the stalk and husk. It is done in different ways, depending on how much grain there is. Essential to threshing is a threshing floor, a flat area of hard rock, on which freshly harvested wheat could be piled.  

Science Olympiad Mock Test - 1 - Question 16

Which of the following vitamin is required for clotting of blood?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 16

Vitamin K is required for clotting of blood. 

Science Olympiad Mock Test - 1 - Question 17

Citrus fruits which are rich in vitamin C help in recovery of __________.

Detailed Solution for Science Olympiad Mock Test - 1 - Question 17

Vitamin C is essential for healing bleeding gums and wounds. Citrus fruits like oranges, grapes, lemons, tomatoes should be eaten in this situation.  

Science Olympiad Mock Test - 1 - Question 18

Gurpartap has 5 holidays in between every consecutive exam. The first exam is on 26th of February, which is a Friday. On which day will he have the next exam, if he has exams in a leap year?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 18

In a leap year, there are 29 days in February. So, if he has one exam after 5 days, which are 27th, 28th, 29th, 1st and 2nd, so he will have his next exam on 3rd of March.  

Science Olympiad Mock Test - 1 - Question 19

Aruna knows that her friend's anniversary is between 10th and 15th, and Sameer knows that it is between 12th and 18th, but they both know that it is on Sunday. If on 10th it is Wednesday, then what is the exact date of the anniversary?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 19

If Wednesday is on 10th, then Sunday is on 14th. So, it means that the anniversary is on 14th.  

Science Olympiad Mock Test - 1 - Question 20

Find the odd one out in the given series.

43, 88, 179, 358

Detailed Solution for Science Olympiad Mock Test - 1 - Question 20

Each time, we are multiplying by 2 and then adding 2. 43 x 2 = 86 + 2 = 88 88 x 2 = 176 = 176 + 2 = 178 (actual) 178 x 2 = 356 + 2 = 358 So, 179 is the odd one out..  

Science Olympiad Mock Test - 1 - Question 21

What happens if a magnet is left to itself over a long period of time?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 21

If a magnet is left to itself over a long period of time, it gets demagnetised, i.e. it loses its magnetic property.  

Science Olympiad Mock Test - 1 - Question 22

Ritesh was working on a project regarding opaque objects. He made a list of opaque objects but was not sure whether all are opaque objects or not. Which one of the following is not an opaque object?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 22

Glass sheet is a transparent object, not an opaque object.
An opaque object is an object through which light cannot pass. The light is either reflected, scattered, or absorbed.

Science Olympiad Mock Test - 1 - Question 23

Piyush does not consume protein-rich food for a long time. Which of the following disorders can he face?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 23

Deficiency of proteins in the diet for a long time results in swelling of the face, swollen neck, undergrowth of the body, etc. This is because proteins are the building blocks of the body and should be taken in sufficient amounts.  

Science Olympiad Mock Test - 1 - Question 24

How do organisms living in the soil breathe?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 24

Air is also an important part of soil. Within the soil, pockets of air are trapped. The organisms living in the soil use oxygen from the air trapped in the pockets of the soil.  

Science Olympiad Mock Test - 1 - Question 25

When HCl present in the stomach is secreted in a large quantity, it causes troubles. What is the remedy for this?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 25

Magnesium hydroxide reduces stomach acid and increases water in the intestines which may induce defecation. Magnesium hydroxide is used as a laxative to relieve occasional constipation (irregularity) and as an antacid to relieve indigestion, sour stomach, and heartburn.  

Science Olympiad Mock Test - 1 - Question 26

Which of the following is/are the symptom(s) of Kwashiorkor?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 26

Kwashiorkor is a severe form of malnutrition, caused by a deficiency in dietary protein. Symptoms of Kwashiorkor are: Dark and scaly skin, anaemia, and mental retardation.  

Science Olympiad Mock Test - 1 - Question 27

The stem(s) of which of the following plants is/are the source of food?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 27

Potatoes, garlic and ginger are underground stems modified to store food.

Science Olympiad Mock Test - 1 - Question 28

Pigments of photosynthesis are present in which organelle of the plant cell?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 28

In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.  

Science Olympiad Mock Test - 1 - Question 29

In a process of photosynthesis, plants take carbon dioxide and release oxygen. Which of the following is/are responsible for taking carbon dioxide from atmosphere?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 29

Stomata take carbon dioxide from atmosphere and are responsible for the process of photosynthesis.  

Science Olympiad Mock Test - 1 - Question 30

What is the name of the process by which pure solids of copper sulphate can be obtained?

Detailed Solution for Science Olympiad Mock Test - 1 - Question 30

Crystallisation is the process by which we can obtain pure solids of copper sulphate.

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