0 of 20 questions completed Questions: Welcome to Insights Secure Prelims – 2014 initiative. The following questions are based on current events that appear in PIB (Public Information Bureau) and from some important newspapers. To view Solutions, follow these instructions: Click on – ‘Start Quiz’ button Solve Questions Click on ‘Quiz Summary’ button Click on ‘Finish Quiz’ button Now click on ‘View Questions’ button – here you will see solutions and links.Quiz-summary
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Question 1 of 20
1. Question
It has been observed that after-effects of low temperature treatment are helpful in promoting the flowering in certain plants. Through this the vegetative period of plant becomes short and early flowering takes place. This phenomenon is known as
Correct
Vernalisation
Vernalization is the acquisition of a plant’s ability to flower in the spring by exposure to the prolonged cold of winter, or by an artificial equivalent. After vernalization, plants have acquired the ability to flower, but they may require additional seasonal cues or weeks of growth before they will actually flower.
Many plants grown in temperate climates require vernalization and must experience a period of low winter temperature to initiate or accelerate the flowering process. This ensures that reproductive development and seed production occurs in spring and summer, rather than in autumn. The needed cold is often expressed in chill hours. Typical vernalization temperatures are between 5 and 10 degrees Celsius (40 and 50 degrees Fahrenheit
Incorrect
Vernalisation
Vernalization is the acquisition of a plant’s ability to flower in the spring by exposure to the prolonged cold of winter, or by an artificial equivalent. After vernalization, plants have acquired the ability to flower, but they may require additional seasonal cues or weeks of growth before they will actually flower.
Many plants grown in temperate climates require vernalization and must experience a period of low winter temperature to initiate or accelerate the flowering process. This ensures that reproductive development and seed production occurs in spring and summer, rather than in autumn. The needed cold is often expressed in chill hours. Typical vernalization temperatures are between 5 and 10 degrees Celsius (40 and 50 degrees Fahrenheit
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Question 2 of 20
2. Question
The interior regions of Eurasia have a large number of inland seas or lakes. Which one of the following touches the boundary of Iran?
Correct
Caspian Sea
Incorrect
Caspian Sea
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Question 3 of 20
3. Question
In a family, a couple has a son and a daughter. The age of the father is three times that of his daughter and the age of the son is half of his mother. The wife is nine years younger to her husband and the brother is seven years older than his sister. What is the age of the mother ?
Correct
60 years
Incorrect
60 years
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Question 4 of 20
4. Question
There are 50 students admitted to a nursery class. Some students can speak only English and some can speak only Hindi. 10 students can speak both English and Hindi. If the number of students who can speak English is 21, then how many students can speak Hindi, how many can speak only Hindi and how many can speak only English ?
Correct
39, 29 and 11 respectively
Incorrect
39, 29 and 11 respectively
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Question 5 of 20
5. Question
Examine the following statements :
I. All members of Mohan’s family are honest.
II. Some members of Mohan’s family are not employed.
III. Some employed persons are not honest.
IV. Some honest persons are not employed.
Which of the following inferences can be drawn from the above statements?
Correct
The employed members of Mohan’s family are honest
Incorrect
The employed members of Mohan’s family are honest
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Question 6 of 20
6. Question
Which of the following were the main objectives of the Khilafat movement?
I. To rouse anti-British feelings among the Muslims of India
II. To reform the Muslim society
III. To demand separate electorates and preserve the Khilafat
IV. To save the Ottoman empire and preserve the Khilafat.
Choose the correct answer from the codes given below:
Correct
I and IV
Incorrect
I and IV
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Question 7 of 20
7. Question
A, B, C, D, E, F and G are members of a family consisting of 4 adults and 3 children, two of whom, F and G are girls, A and D are brothers and A is a doctor. E is an engineer married to one of the brothers and has two children. B is married to D and G is their child. Who is C ?
Correct
A’s son
Incorrect
A’s son
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Question 8 of 20
8. Question
A, B, C, D, E and F, not necessarily in that order are sitting on six chairs regularly placed around a round table. It is observed that
A is between D and F,
C is opposite D,
and D and E are not on neighbouring chairs.
Which one of the following pairs must be sitting on neighbouring chairs ?
Correct
C and E
Incorrect
C and E
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Question 9 of 20
9. Question
In Jainism ‘perfect knowledge’ is referred to as
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Question 10 of 20
10. Question
The average speed of a train in the onward journey is 25% more than that of the return journey. The train halts for one hour on reaching the destination. The total time taken for the complete to and fro journey is 17 hours covering a distance of 800 km. The speed of the train in the onward journey is
Correct
56.25 km per hour
Incorrect
56.25 km per hour
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Question 11 of 20
11. Question
In Mizoram, the settlement pattern is mostly of ‘linear type’ along the ridges, because
Correct
The valleys are cooler than the ridges
Incorrect
The valleys are cooler than the ridges
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Question 12 of 20
12. Question
In Mughal paintings one notices the adoption of principle of foreshortening whereby near and distant people and things could be placed in perspective. This was due to the influence of the
Correct
Portugese
Incorrect
Portugese
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Question 13 of 20
13. Question
In a town 25% families own a phone and 15% own a car. 65% families own neither a phone nor a car. 2000 families own both a car and a phone.
Consider the following statements in this regard:
I. 10% families own both a car and a phone.
II. 35% families own either a car or a phone.
III. 40,000 families live in the town.
Which of the above statements are correct ?
Correct
II and III
Incorrect
II and III
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Question 14 of 20
14. Question
In a group of five people—K, L and M are ambitious; M, N and R are honest; L, M and N are intelligent and K, N and R are industrious. Among these, neither industrious nor ambitious person(s) would include
Correct
None in the group
Incorrect
None in the group
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Question 15 of 20
15. Question
The solar eclipse achieves totality only in the limited geographical regions because
Correct
The size of the shadow of the moon on the earth is small compared to the cross section of the earth
If the Moon were in a perfectly circular orbit, a little closer to the Earth, and in the same orbital plane, there would be total solar eclipses every single month. However, the Moon’s orbit is inclined (tilted) at more than 5 degrees to Earth’s orbit around the Sun (see ecliptic) so its shadow at new moon usually misses Earth. Earth’s orbit is called the ecliptic plane as the Moon’s orbit must cross this plane in order for an eclipse (both solar as well as lunar) to occur. In addition, the Moon’s actual orbit is elliptical, often taking it far enough away from Earth that its apparent size is not large enough to block the Sun totally. The orbital planes cross each year at a line of nodes resulting in at least two, and up to five, solar eclipses occurring each year; no more than two of which can be total eclipses.[1][2] However, total solar eclipses are rare at any particular location because totality exists only along a narrow path on Earth’s surface traced by the Moon’s shadow or umbra.
Incorrect
The size of the shadow of the moon on the earth is small compared to the cross section of the earth
If the Moon were in a perfectly circular orbit, a little closer to the Earth, and in the same orbital plane, there would be total solar eclipses every single month. However, the Moon’s orbit is inclined (tilted) at more than 5 degrees to Earth’s orbit around the Sun (see ecliptic) so its shadow at new moon usually misses Earth. Earth’s orbit is called the ecliptic plane as the Moon’s orbit must cross this plane in order for an eclipse (both solar as well as lunar) to occur. In addition, the Moon’s actual orbit is elliptical, often taking it far enough away from Earth that its apparent size is not large enough to block the Sun totally. The orbital planes cross each year at a line of nodes resulting in at least two, and up to five, solar eclipses occurring each year; no more than two of which can be total eclipses.[1][2] However, total solar eclipses are rare at any particular location because totality exists only along a narrow path on Earth’s surface traced by the Moon’s shadow or umbra.
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Question 16 of 20
16. Question
The formation of brilliant colours in soap film is a consequence of the phenomenon of
Correct
Multiple reflection and interference
The iridescent colours of a soap film are caused by interfering of (internally and externally) reflected light waves, a process called thin film interference and are determined by the thickness of the film. This phenomenon is not the same as the origin of rainbow colours (caused by the refraction of internally reflected light), but rather is the same as the phenomenon causing the colours in an oil slick on a wet road.
http://www.animations.physics.unsw.edu.au/jw/light/soap-bubbles.htm
Incorrect
Multiple reflection and interference
The iridescent colours of a soap film are caused by interfering of (internally and externally) reflected light waves, a process called thin film interference and are determined by the thickness of the film. This phenomenon is not the same as the origin of rainbow colours (caused by the refraction of internally reflected light), but rather is the same as the phenomenon causing the colours in an oil slick on a wet road.
http://www.animations.physics.unsw.edu.au/jw/light/soap-bubbles.htm
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Question 17 of 20
17. Question
Assertion (A) :
A mixture of salt and ice gives temperature below 0°C.
Reason (R) :
The salt raises the freezing point of ice.
Correct
A is true but R is false
http://chemistry.about.com/od/howthingsworkfaqs/f/how-does-salt-melt-ice.htm
Incorrect
A is true but R is false
http://chemistry.about.com/od/howthingsworkfaqs/f/how-does-salt-melt-ice.htm
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Question 18 of 20
18. Question
Sucrose content in sugarcane decreases
Correct
If there is high temperature during the time of ripening
Growth is closely related to temperature. Optimum temperature for sprouting (germination) of stem cuttings is 32° to 38°c. It slows down below 25°, reaches plateau between 30°-34°, is reduced above 35° and practically stops when the temperature is above 38°.Temperatures above 38° reduce the rate of photosynthesis and increase respiration. For ripening, however, relatively low temperatures in the range of 12° to 14° are desirable, since this has a noticeable influence on the reduction of vegetative growth rate and enrichment of sucrose in the cane.
At higher temperatures reversion of sucrose into fructose and glucose may occur besides enhancement of photorespiration thus leading to less accumulation of sugars. Severe cold weather inhibits bud sprouting in ratoon crop and arrests cane growth. Temperatures lower than 0°C induces freezing of less protected parts such as young leaves and lateral buds. The damage depends upon the length of the cold period. Smut initiation and spread is high at ambient temperatures of 25° -30°. Similarly the spread of red not disease is high at higher temperatures (37°-400°) when all other conditions are similar. Rust incidence is high when the minimum temperatures are drastically reduced. Shoot-fly incidence is high in summer when the air temperatures are very high. Also higher shoot fly incidence was observed when the difference between maximum (day) and minimum (night) temperature are low.Incorrect
If there is high temperature during the time of ripening
Growth is closely related to temperature. Optimum temperature for sprouting (germination) of stem cuttings is 32° to 38°c. It slows down below 25°, reaches plateau between 30°-34°, is reduced above 35° and practically stops when the temperature is above 38°.Temperatures above 38° reduce the rate of photosynthesis and increase respiration. For ripening, however, relatively low temperatures in the range of 12° to 14° are desirable, since this has a noticeable influence on the reduction of vegetative growth rate and enrichment of sucrose in the cane.
At higher temperatures reversion of sucrose into fructose and glucose may occur besides enhancement of photorespiration thus leading to less accumulation of sugars. Severe cold weather inhibits bud sprouting in ratoon crop and arrests cane growth. Temperatures lower than 0°C induces freezing of less protected parts such as young leaves and lateral buds. The damage depends upon the length of the cold period. Smut initiation and spread is high at ambient temperatures of 25° -30°. Similarly the spread of red not disease is high at higher temperatures (37°-400°) when all other conditions are similar. Rust incidence is high when the minimum temperatures are drastically reduced. Shoot-fly incidence is high in summer when the air temperatures are very high. Also higher shoot fly incidence was observed when the difference between maximum (day) and minimum (night) temperature are low. -
Question 19 of 20
19. Question
A man is standing on the 8 m long shadow of a 6 m long pole. If the length of his shadow is 2.4 m, what is the height of the man ?
Correct
1.8 m
Incorrect
1.8 m
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Question 20 of 20
20. Question
A fertile-soil, suitable for growing common crops, is likely to have a pH value of
Correct
6.5 to 7
The first order of business is a quick review of pH and the associated terminology. Soil pH or soil reaction is an indication of the acidity or alkalinity of soil and is measured in pH units. The pH scale goes from 0 to 14 with pH 7 as the neutral point. As the amount of hydrogen ions in the soil increases, the soil pH decreases, thus becoming more acidic. From pH 7 to 0, the soil is increasingly more acidic, and from pH 7 to 14, the soil is increasingly more alkaline or basic.
Using a strict chemical definition, pH is the negative log of hydrogen (H+ ) activity in an aqueous solution. The point to remember from the chemical definition is that pH values are reported on a negative log scale. So, a 1 unit change in the pH value signifies a 10-fold change in the actual activity of H+, and the activity increases as the pH value decreases.
To put this into perspective, a soil pH of 6 has 10 times more hydrogen ions than a soil with a pH of 7, and a soil with a pH of 5 has 100 times more hydrogen ions than a soil with a pH of 7. Activity increases as the pH value decreases.
Agronomists generally use soil pH as measured in a 2:1 water-to-soil mixture as an index of a soil’s acidity or alkalinity. In a soil test report, pH is often reported with descriptive modifier as shown in Table 1.
Table 1. Soil pH and Interpretation 5.05.56.06.57.07.58.0Strongly
AcidMedium
AcidSlightly
AcidNeutralNeutralMildly
AlkalineModerately
AlkalineBest Range for Most CropsIncorrect
6.5 to 7
The first order of business is a quick review of pH and the associated terminology. Soil pH or soil reaction is an indication of the acidity or alkalinity of soil and is measured in pH units. The pH scale goes from 0 to 14 with pH 7 as the neutral point. As the amount of hydrogen ions in the soil increases, the soil pH decreases, thus becoming more acidic. From pH 7 to 0, the soil is increasingly more acidic, and from pH 7 to 14, the soil is increasingly more alkaline or basic.
Using a strict chemical definition, pH is the negative log of hydrogen (H+ ) activity in an aqueous solution. The point to remember from the chemical definition is that pH values are reported on a negative log scale. So, a 1 unit change in the pH value signifies a 10-fold change in the actual activity of H+, and the activity increases as the pH value decreases.
To put this into perspective, a soil pH of 6 has 10 times more hydrogen ions than a soil with a pH of 7, and a soil with a pH of 5 has 100 times more hydrogen ions than a soil with a pH of 7. Activity increases as the pH value decreases.
Agronomists generally use soil pH as measured in a 2:1 water-to-soil mixture as an index of a soil’s acidity or alkalinity. In a soil test report, pH is often reported with descriptive modifier as shown in Table 1.
Table 1. Soil pH and Interpretation 5.05.56.06.57.07.58.0Strongly
AcidMedium
AcidSlightly
AcidNeutralNeutralMildly
AlkalineModerately
AlkalineBest Range for Most Crops
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