Explore topic-wise InterviewSolutions in Current Affairs.

Following are the two merits of random sampling method : 

1. This is a simple method. 

2. It is the less expensive method.

Following are the two qualities of census investigation method : 

1. Detailed information is collected thought this method. 

2. Data collected through this method has high level of accuracy.

When a statistical investigation is conducted by the investigator, in which the data is collected from each element of the population, is studied properly, then the process is called census investigation.

There can be 10 samples.

(c) Memorandum of Association 

Memorandum of association defines the relationship of the company with outsiders.

(c)Memorandum of Association

Correct option is (b) Laplace

Correct option is (d) 15 companies.

NSSO – National Sample Survey Organisation.

When the data is collected directly by the investigator from the individuals or people through interview it is called as personal interview.

Microbes have been a source of antibiotics. Antibiotics have been used successfully against pathogenic bacteria.

E.g.: streptomycin (str. griseus), erythromycin (str. erythreus),Bacitracin (Bacillus licheni – formis)

(i) False.

(ii) False.

(iii) False.

(iv) True.

(v) False.

Underground stem

Asexual reproduction

(c)  Rhizome

Habitat means a dwelling place (a home). The surroundings where organisms live is called a habitat. The organisms depend for their food, water, air, shelter and other needs on their habitat. Several kinds of plants and animals may share the same habitat

Correct answer is (b) Water

Correct answer is (c) Edit

(d) Species 

[Clue : The singular form of ‘Fungi’ is ‘Fungus’. And for ‘Species’ , it is the same in singular, in plural.]

(i) Due to small size, high electronegativity and high ionization enthalpy of Be, BeCl₂ is covalent and hence most soluble in organic solvents such as ethanol.    

(i) Mg(OH)₂  As the ionization enthalpy increases from Mg →Ba, the M – O bond becomes weaker and weaker down the group and hence basicity increases down the group. Thus, Mg(OH)₂ is least basic.  

Ionisation enthalpy increases in a period with increase in atomic number. The graph shows few exceptions and not the linear relationship. Ionisation enthalpy of Be is greater than that of B due to filled s-orbital in Be (Be – l.s² 1s², B – 1s² 2s² 2p¹). 

Ionisation enthalpy of N is greater than that of O due to half-filled/?-orbitals in nitrogen. 

(N – 1s² 2s²2p³ O – 1s² 2s² 2p⁴).

Correct option is  B) 1.615 : 1

Correct option is (B) 1.615 : 1

Two numbers a & b are in the golden ratio if the ratio of the sum of numbers divided by larger number (let a) is equal to the ratio of the larger number divided by the smaller number (i.e., \(\frac ab)\)

i.e., \(\frac{a+b}a=\frac ab\)

Golden ratio \(=\frac{1+\sqrt5}2\) = 1.618

\((\because\frac{1+\sqrt5+2}{1+\sqrt5}=\frac{3+\sqrt5}{1+\sqrt5}=\frac{5.236}{3.236}=1.618\) \(and\;\frac{1+\sqrt5}2=1.618)\)

Correct option is  C) ac : bd

Correct option is (C) ac : bd

The compound ratio of a : b and c : d is ac : bd.

Saturn and Jupiter take 9 hours 56 minutes and 10 hours 40 minutes, respectively for one spin on their axes. The ratio of the time taken by Saturn and Jupiter in lowest form is 149: 160.

From the question,

Saturn takes 9 hours 56 minutes for one spin on their axes

We know that, 1 hour = 60 minutes

So, (9 × 60) + 56 = 540 + 56 = 596 minutes

Jupiter takes 10 hours 40 minutes for one spin on their axes

= (10 × 60) + 40

= 600 + 40

= 640 minutes

The ratio of the time taken by Saturn and Jupiter in lowest form is = 596/640

Divide both numerator and denominator by 2,

= 298/320

Again, divide both numerator and denominator by 2,

= 149/160

Therefore, the ratio of the time taken by Saturn and Jupiter in lowest form is 149: 160.

Correct option is  A) 45 : 14

Correct option is (A) 45 : 14

Inverse ratio of 2 : 9 is 9 : 2.

\(\therefore\) The compound ratio of 5 : 7 and inverse 2 : 9 is equal to the compound ratio of 5 : 7 and 9 : 2.

\(=\frac57\times\frac92=\frac{45}{14}\)

Thus, the compound ratio of 5 : 7 and inverse 2 : 9 is 45 : 14.

Olfactory nerve carries the sense of smell to the sensory strip present in the cerebrum. The sensory areas are present in the parietal lobe of the cerebrum. The stimuli of smell reaches the mammillary bodies present in the hypothalamus. This produces olfactory reflexes and emotional responses to odour.

1. My mother is open-minded; she doesn’t stick to one idea. 

2. She listens to other people and changes her mind if it is necessary. 

3. My father, on the other hand, is very stubborn. 

4. If he has an opinion, he refuses to change it. 

5. I think they have only one personality trait in common. 

6. They are both very giving to my sister and me.

The Magi were the wise men who brought gifts to the newborn Jesus. According to the Bible, the magi were three kings (Casper, Melchior, and Balthazar) who traveled to Bethlehem from somewhere in the East (probably Persia).

(A)(a) The next day was Christmas Day and Della had only one dollar and eighty-seven cents with which to buy Jim a present. She had spent a lot of time thinking about a good present for him. but with the money she had saved she would not get anything worthy of him. Hence, she was feeling disturbed. 

(b) $20 per week. 

(c) Della’s beautiful hair 

(d) twenty-one dollars. 

(e) Jim saw that Della had cut off her beautiful hair. It was seeing this that sent him into a trance.

(B) (a) to get money to buy a Christmas present for Jim. 

(b) she was afraid of Jim’s reaction. 

(c) the leather strap he used in place of a chain was old.

(d) Jim’s gift to Della was the set of tortoise shell combs that she had adored. She had craved and yearned for them, so that they could adorn her beautiful hair. When she opened the package and saw them, she was first ecstatic with joy that she had got what she had coveted; but her scream of joy turned to wails when she remembered that the beautiful hair they would have adorned was now cut off. The gift was hence useless.

(e) Jim knew that neither of them could use their Christmas gifts for the time being. Hence, he wanted to put them away and keep them for some time. He wanted to get back to daily life. Hence, he asked Della to put the chops on.

(c) (a) a former period of prosperity, when he was earning $30 per week. 

(b) Della made up her mind to cut off her beautiful hair. 

(c) she was searching for a suitable present for Jim. 

(d) she heard Jim’s step on the stairway down on the first flight. 

(e) Jim realized that Della was afraid of his reaction to her short hair. In order to console her, he probably hugged her and the narrator tries to divert our attention to something else, to give them privacy. It could also mean that the narrator is asking us to think about the importance of riches-how important is it to happiness.

If I ran short of money to buy a gift for one of my parents/siblings, I would borrow from someone else close to me. For example, if I wanted to buy a bag for my sister and fell short of money, I would ask my mother to lend it to me. If I wanted to buy something for Mom and did not have the money for it, I would borrow from dad.

Water is purified by filtration

The divine Amrita is the imaginary elixir of life.

If there is plenty of water and abundant rainfall, there will be good growth of plants. The population of animals depending on these plants will increase. On the other hand, if there is a drought, there will be a smaller supply of plants. The animals depending on these plants will decrease in population as a result of the decrease in the plant population. Water is the fundamental necessity for both animal and plant forms.

Water is the elixir of all life. Even fauna and flora contains a considerable proportion of free or combined water in its body. Hence, physiological activity is impossible where the fluid does not play an important role.

Map unit or Centimorgan

Correct Answer is : 36

For proper storage of grains these methods can be adopted: 

(a) Moisture content: grains should be completely dried before storing them. 

(b) Cleanliness and maintenance of hygiene. 

(c) Use of fume forming pesticides. (Gaseous form of pesticides are called fumigants).

Preventive measures and biological control methods should be preferred for protecting crops because excessive use of chemicals can cause harm to the environment. These chemicals are also poisonous for plants and animals. These chemicals are absorbed by the plants along with water and minerals from the soil and are taken by aquatic plants and animals as well. Preventive method are those which can be done beforehand to prevent the loss. These measures include proper soil and seed preparation, timely sowing of seeds, inter-cropping and mixed cropping, usage of disease resistant crops, etc. 

On the other hand, biological control methods involve the use of bio-pesticides that are less toxic for the environment as they are made from organic material. Therefore, both preventive measures and biological control methods are considered eco-friendly methods of crop protection.

Preventive and control methods used before storage of grains:

(i) Cleaning of produce before storage

(ii) Drying of produce first in sunlight and then in shade to reduce moisture content

(iii) Fumigation using chemicals (fumigants) to kill pests.

Because insects, rodents, fungi, miles and bacteria, moisture and temperature cause degradation in quality, loss in weight, poor germinability, discolouration of produce, all leading to poor marketability of crops. Therefore By preventive measures and biological control methods crops should be protected.

Preventive measures and biological control methods should be preferred for protecting crops because excessive use of chemicals leads to environmental problems. These chemicals are also poisonous for plants and animals. Preventive measures include proper soil and seed preparation, timely sowing of seeds, intercropping and mixed cropping, usage of resistant varieties of crops, etc. On the other hand, biological control methods include the usage of biopesticides that are less toxic for the environment. An example of bio-pesticides is Bacillus thuringenesis, which is an insect pathogen that kills a wide range of insect larvae. Therefore, both preventive measures and biological control methods are considered eco- friendly methods of crop protection.

Disputes and conflicts arise when there is lack of agreement in the opinions, ideas and views of the people.

• Disputes and conflicts arise when there is lack of agreement in the opinion, ideas and views of the people. 
• Just as there is cooperation in the society, so also at times there can be differences of opinion, disputes and conflicts. 
• Prejudices and misconceptions about each other too can also lead to conflicts.

Calcium, nitrogen and phosphorus are macronutrients which are required by plants in higher quantity for its proper growth and reproduction. But Iron is a micronutrient, meaning it is required by plants in lesser amounts than primary or secondary macronutrients.

Nutrients supplied by air:-Oxygen(O₂)-Carbon(C)Nutrients supplied by water:-Hydrogen (H)-oxygen(O₂)

Production is that activity which is based on or related to the use of scarce resources for the satisfaction of human wants.

Product pricing involves the to determination of the price of the product under different conditions of the market, viz. perfect competition, monopoly and imperfect competition

Market refers to a mechanism or an arrangement that facilitates contact between the buyers and sellers for the sale and purchase of goods and services.

a) Molecular mass: The molecular mass of a substance is the sum of atomic masses of all the atoms in a molecule of the substance. 

i. It is used for those substances whose constituent particles are molecules. 

ii. The molecular mass remains the same even if millions of molecules are added.

iii. For example: The molecular mass of H₂O = 2 × Atomic mass of hydrogen + Atomic mass of oxygen 

= 2 + 16 = 18u 

b) Molecular mass of ZnSO₄ : 

Atomic mass of Zn + Atomic mass of S + 4× atomic mass of O

65 u + 32 u + 4× 16u

65 u + 32 u + 64 u 161 u 

Thus, the molecular mass of ZnSO₄ is 161u