Question Discussion & Solution

Question: Should examinations be held in the school system?

The argument I says Yes, examinations assess students' academic and non-academic achievements is the correct as evaluation plays important role for checking students performance. 

Argument II No, many students do not like exams is wrong. Student do not like many things that does not mean that is not important. 

Hence, option 1 is the correct answer.

'Loyalty', 'Allegiance', and 'Commitment' are synonyms.

Whereas, 'Infidelity' is an antonym of 'Loyalty'.

Hence, the correct answer is 'Infidelity'.

The Correct Answer is "boron deficiency".

• Boron deficiency is a deficiency of the micronutrient boron in plants.
• It causes large losses in crop production and crop quality
• It affects the vegetative and reproductive growth of plants, resulting in inhibition of cell expansion, death of meristem, and reduced fertility.

​Important Points

• Boron deficiency in sugar beets characteristically causes the death of the growing point and the development of blackheart rot.
• Before the deficiency has reached this stage, the leaves, which may have cracked petioles, will have become progressively smaller and somewhat misshapen.
• After the death of the growing point, small bunches of leaves develop in the older leaf axils and the crown is very liable to become hollow and rot.

Additional Information

• The hollow heart is an internal disorder where a 'lens' or 'star'-shaped cavity forms in the tuber.
• It appears to be caused by an abrupt change in tuber growth rate which usually occurs after a period of stress.
• Water, heat stress and associated calcium deficiency appear to have a role in the development of a hollow heart.
• The crisp variety Atlantic and the French fry variety Russet Burbank are prone to hollow heart but if conditions are right most varieties can be affected.
• Hollow heart is an important problem for the potato industry as payments from processors and washer-packers for fresh market potatoes may be reduced. 

The correct answer is ​Heat is absorbed.

Key Points

•  When ice is converted into water heat is absorbed by the ice, so the molecules of ice increase their energy and convert into water. Hence option A is correct.
• Additional Information
• The conversion of ice into water is an example of melting. If you took out the ice cubes from the freezer and placed them in a warm room, the ice would absorb energy from the warmer air around them. This absorbed energy would facilitate them to overcome the force of attraction holding them together, enabling them to slip out of the fixed position that they held as ice. The process in which solids change to a liquid is called melting. The melting point is the temperature at which a solid changes to a liquid. 
• The static water is converted to ice It means when the water is converted into ice its potential energy decreases. 
• If we compare the kinetic and potential energy of the water vapor, water and ice then water vapor has the most kinetic as well as potential energy as compared to water and ice.
• This is because the particle of water vapor is free to move and they can move more vigorously. Please note that kinetic energy is associated with moving objects whereas potential energy is associated with a static object. 

The correct answer is citric.

• Orange juice contains citric acid due to which tastes sour.

Key Points

• Fruits that contain citric acid are called citrus fruits.
• Citrus fruits are lemon, lime, orange, Grapefruit, etc.
• The formula of citric acid is C₆H₈O₇.

Additional Information

• Oxalic acid is found in tomato.
  • Its formula is C₂H₂O₄.
• Formic acid is found in the sting of ants and bees.
  • Its formula is CH₂O₂.
• Acetic acid is found in vinegar.
  • Its formula is id CH₃COOH.