Explore topic-wise InterviewSolutions in Current Affairs.

Yes, Once I had vomiting and loose motions. Doctor said my stomach was upset. My body was not keeping any food and water and I became very weak. Then I was given glucose drip that gave me some strength quickly even without eating.

While playing a lot of sweating occurs which causes loss of water and salt from the body. Also a lot of energy is exhausted. Since glucose solution provides instant energy, that is why the teacher used to tell the girls to have glucose while they were playing hockey.

The quantity of water, salts and sugar in our body decreases when we have vomiting and loose motions. To replenish this loss a solution of sugar and salt is given.

C. He worked very hard but he earned very little money

Taro and his parents felt very cold ? one evening because a strong wind whistled s through the cracks of their hut.

Taro stopped working as he heard the sound of rushing water.

Taro started feeling very warm as he was chopping the wood and as the sun climbed, he was so warm that he needed to take off his jacket.

If I were in the traveller’s place, I would choose the road that was more travelled. I would not want to go on a strange road which many have not travelled by. I am not adventurous. I feel that there is safety in doing what others are doing or have done.

The poet feels sorry that he cannot travel along both the roads at the same time.

No, the poet did not choose the road quickly, He stood for a long time at the fork before he took a decision.

No, both were equally good.

a. The meaning of Tegumai is Man who does not put his foot forward in a hurry. He lived up to his name when he showed patience in mending his spear and did not just rush off home or send Taffy back to get another spear. He also did not ask Taffy too many questions about what she had been doing when he was busy repairing his spear, or about her conversation with the Stranger-man. He was patient and cautious.

b. The meaning of Taffimai is Small-person- without any manners who ought to be spanked. She lived up to her name in the way in which she ordered the stranger ‘Come here’, stamped her foot and called him silly. She wanted the stranger to do her bidding and she succeeded in it. She pulled off the shark’s tooth from his necklace without his permission. She would not tell her father what she had done and she wanted him to promise to be surprised. This was a silly thing to do but he did it.

c. The meaning of Teshumai is Lady-who-asks- very many-questions. Though she did not ask many questions, she talked and shouted continuously at the poor stranger. She drew wrong conclusions and she spoke continuously to her friends telling them all that she had understood from Taffy’s drawing.

A recombinant vaccine is a vaccine produced through recombinant DNA technology. This involves inserting the DNA encoding an antigen that stimulates an immune response into bacterial or mammalian cells. Recombinant DNA technology has allowed the production of antigenic polypeptides of pathogen in bacteria or yeast. Vaccines produced using jthis approach allow large scale production and hence greater availability for immunisation, e.g., hepatitis B vaccine (Recombivax HB) produced from yeast. As of June 2015 one human DNA vaccine had been approved for human use, the single-dose Japanese encephalitis vaccine called IMOJEV, released in 2010 in Australia.

Advantages of recombinant DNA vaccines:

1. No risk for infection

2. Ease of development and production

3. Stability for storage and shipping

4. Cost-effectiveness

5. Expression and purification of recombinant proteins

6. Long-term persistence of immunogen

7. In vivo expression ensures protein more closely resembles normal eukaryotic structure, with accompanying post-translational modifications.

(i) (a) Good initiative approach of reuse.
(b) Sensitising general public towards community.
(ii) Invoking social responsibility among citizens by contributing their share towards much generous acts of society towards their under privileged fellows.

Wrong: Fundamental Rights put restrictions on the power of the government and one of the restriction states that the state should not discriminate between and among citizens on the basis of gender amongst other things.

No I don’t think it is unfair to such children to insist that they go to school.

(i) Practicing child labour is a form of exploitation and we have the Right against Exploitation which extends constitutional protection to children.

(ii) Similarly it is the Fundamental Duty of every citizen who is a parent or guardian to provide opportunities of education to his or her child or ward between the age of six and fourteen years.

No, rulers involve a large number of people whose lives or deaths don’t matter for them. So, rulers usually don’t understand the true meaning of life.

Restrictions upon the powers of the Government are listed below:

• State should not discriminate between and among citizens on the basis of caste, religion, race, language or gender.
• State shall not deny anybody equality before the law and equal protection of the laws.
• No person shall be deprived of his life.
• State shall not impose any religious taxes.

The list of our demands are:

• Emphasis on skill training in school.
• Choice of a wide variety of subjects based on one’s interest.
• Compulsory training in a particular Sport.
• Making a foreign language compulsory in the curriculum.
• Better facilities in schools.
• Programme of mid-day meals should be implemented in all the schools in the rural areas.
• Inspection of schools from time to time to check the quality of education imparted.
• I will convince others through dialogues and discussion and go by the will of the majority.

(a) Bleaching powder.

(b) Gypsum.

(c) It sets into a hard mass in about 30 mins.

(d) Chlorine is used for sterilising drinking water supply because it is a disinfectant which kills germs or bacteria.

Sodium Hydroxide (NaOH)

Sodium hydroxide is commonly called caustic soda because of its corrosive action on animal and vegetable tissues. Large quantity of sodium hydroxide is prepared by electrolytic process called the 'Chlor-alkali process'. Here, chlorine gas is given of at the anode and hydrogen gas at the cathode. Sodium hydroxide solution is formed near the cathode.

Sodium Chloride

Sodium chloride is the commonly available salt and so is called common salt. Seawater is the main source of sodium chloride. Seawater contains about 3.5% of soluble salts, the most common of which is sodium chloride (2.7 to 2.9%). Saline water of inland lakes is also a good source of this salt. Sodium chloride is also found as rock salt. 

Common salt is generally obtained by evaporation of seawater. Crude sodium chloride is obtained by crystallization of 'brine' that contains sodium sulphate, calcium sulphate, calcium chloride and magnesium chloride as impurities.

Pure sodium chloride is obtained from the crude salt by dissolving it in minimum amount of water and filtering it to remove insoluble impurities. The solution is then saturated with hydrogen chloride gas, when crystals of pure sodium chloride separate out. Calcium and magnesium chlorides, being more soluble than sodium chloride, remain in solution.

(a) Sodium hydroxide:

(i) It is used for making soaps and detergents.

(ii) It is used in the manufacture of paper.

(b) Chlorine:

(i) It is used in the production of bleaching powder.

(ii) It is used in the production of hydrochloric acid.

(c) Hydrogen:

(i) It is used in the production of hydrochloric acid.

(ii) It is used in the hydrogenation of oils.

(d) Hydrochloric acid:

(i) It is used in medicines and cosmetics.

(ii) It is used in textile/dyeing and tanning industries.

(a) It is used in the manufacture of soap.

(b) It is used in cooking food.

Properties of Sodium chloride

• Sodium chloride is a white crystalline solid having a density of 2.17 g/ml.

• It melts at 1080 K (807°C) and boils at 1713 K (1440°C).

• It is soluble in water and its solubility is 36 g per 100 g of water at 273 K. (0°C). The solubility in water remains constant with temperature.

• Pure sodium chloride is non-hygroscopic, but behaves as hygroscopic due to the impurities of CaCl₂ and MgCl₂ in it.

• Solid Sodium chloride does not conduct electricity at room temperature but molten sodium chloride is a very good ionic conductor.

(a) Bleaching powder is used for bleaching purposes in textile and paper industry and in laundry.

(b) It is also used as a disinfectant for water.

Uses of Sodium hydroxide

• In the manufacture of soap, paper, viscose rayon (artificial silk), organic dyestuffs, and many other chemicals.

• In the refining of petroleum and vegetable oils.

• In the purification of bauxite for the extraction of aluminum.

• As a cleansing agent and in washing powder for machines, metal sheets etc. It is too caustic to be used in washing clothes or hands.

• For mercerizing cotton.

• As a reagent in the laboratory.

• In reclaiming rubber.

• In the preparation of soda lime.

Let fixed rent of the house = Rs. x

And the mess charges per head per month = Rs. y

According to the question,

x + 2y = 3900 …(i)

and x + 5y = 7500 …(ii)

On subtracting Eq. (i) from Eq. (ii), we get

x + 5y – x – 2y = 7500 – 3900

⇒ 3y = 3600

⇒ y = 1200

On putting the value of y = 1200 in Eq. (i), we get

x + 2 (1200) = 3900

⇒ x + 2400 = 3900

⇒ x = 1500

Hence, fixed rent of the house is Rs. 1500 and the mess charges per head per month is Rs. 1200.

Cost of goods sold = Opening stock + Net purchases + Direct expenses – Closing stock

= 10,000 + 80,000 + 7,000 – 15,000 

= Rs. 82,000 

Note: Indirect expenses do not form part of cost of goods sold.

(A) 18th, 19th

(C) Amsterdam

(D) All the above

(A) Self Help Group

Correct option is (D) Does not exists

Given system of equations is

kx – y = 2

\(\Rightarrow\) kx - y - 2 = 0    _________(1)

6x – 2y – 3 = 0    _________(2)

By comparing given system with standard form of system, we get

\(a_1=k,b_1=-1,c_1=-2\)

and \(a_2=6,b_2=-2,c_2=-3\)

\(\therefore\) \(\frac{a_1}{a_2}=\frac k6,\)

\(\frac{b_1}{b_2}=\frac{-1}{-2}=\frac12\)

\(\frac{c_1}{c_2}=\frac{-2}{-3}=\frac23\)

\(\because\) \(\frac12\neq\frac23\)

\(\therefore\) \(\frac{b_1}{b_2}\neq\frac{c_1}{c_2}\)

But condition for infinitely many solutions is

\(\frac{a_1}{a_2}=\frac{b_1}{b_2}=\frac{c_1}{c_2}\) which is not possible.

Hence, for any value of k, the given system never give infinitely many solutions.

Hence, the value of k does not exists.

Correct option is D) Does not exists

Correct option is  C) 2/7

Correct option is  D) 0.298

Correct option is  B) 0.027

Correct option is   C) \(\frac{52}{55}\)

Correct option is  A) 1/5

The correct answer is 11/16 < 14/15

(i) yes, Mendeleev’s suggestion was correct as it was found later on experimentally that beryllium’s atomic mass is 9. 

(ii) He studied the formula of hydrides and oxides of beryllium and observed that they had similarity with those of magnesium oxides and hydrides. Thus he placed the beryllium above Mg and predicted its atomic mass as 9.

Silicon and Germanium are metalloids but boron is a non-metal but there is no such option mentioned so we will go with option (c).

In the modern periodic table it consists of 18 vertical columns known as Groups and 7 horizontal rows known as periods. According to this definition, only option (c) matches.

Li, C and N all three belong to the same period. They are present in the order: Li < Be < B < C < N. On moving along a period from left to right, the metallic character decreases and non-metallic character increases. So Li has the most metallic character and N has the most non- metallic character. Since metal-oxides is basic in nature, therefore oxide of Li will be most basic and non-metal oxide is acidic in nature, therefore Oxide of Nitrogen will be most acidic.

(a) Modern periodic table arranges the elements according to increasing atomic numbers. So, the atomic number of cobalt (27) comes first whereas the atomic number of nickel (28) comes later.

(b) In Mendeleev’s periodic table, hydrogen has been placed in group I since like alkali metals, hydrogen also combines with halogens, oxygen and sulphur to form compounds having similar formulae. This means that hydrogen resembles alkali metals in some of the properties. Hydrogen also resembles halogens in some of the properties. So, hydrogen could also be placed in group VII of halogen elements. Thus, Mendeleev’s periodic law could not assign a correct position to hydrogen in the periodic table.

(a) As we move from Na to Cl in the 3rd period, the size of the atoms of the elements decreases. Na atom is the biggest whereas Cl atom is the smallest in size. As we move from left to right in a period, the atomic no. of elements increases i.e. the number of protons and electrons in the atoms increases. Due to large positive charge on nucleus, the electrons are pulled in more close to the nucleus and thus the size of the atom decreases from Na to Cl.

(b) Helium and neon atoms have completely filled outermost electron shells (containing the maximum number of electrons which can be accommodated in them) .

(a) Increases

(b) Increase

(c) Decrease

(d) Increases

(e) Increases

(a) The tendency of an atom to lose electrons increases on moving down in a group of the periodic table. As we go down in group 1, one more electron shell is added at every stage and the size of the atom increases. The valence electrons become more and more away from the nucleus and hold of the nucleus on valence electrons decreases. Due to this, the atoms can lose valence electrons more easily to form positive ions and hence electropositive character increases.

(b) The tendency of an atom to gain electrons decreases on going down in a group of the periodic table. When we move from top to bottom in group 17, a new shell of electrons is added to the atoms at every step, due to which the size of atom increases. The nucleus goes more deep inside the atom due to which the attraction of nucleus for the incoming electron decreases due to which the atom cannot form negative ions easily and hence the electronegative character decreases.

The answer is (b) decreases

Atomic radius decreases when we move from left to right in a periods hence the size of the atom also decreases