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9751.

Generally body armour was worn with other items like helmets, leg wear and arm armour. Explain.

Answer»

Helmets- spike, plume holder, faceguard, neck piece, mail curtain.

Leg armour- sabaton and greaves

Arm armour- Bajubandh, gauntlet

9752.

List the body measurements required to develop skirt block. How will you take them?

Answer»

(a) Centre front length for lower garment – From centre front waistline intersection at centre front down to the desired length.

(b) Front hipline- Place a pin at 7” below the waistline on centre front line. From CF intersection to side seam intersection.

(c) Back hipline-From CB intersection to SS intersection on hip line.

9753.

How will you develop A-line skirt from one dart skirt? Explain with the help of relevant figures.

Answer»

(a) Take one dart sloper, draw a slash line.

(b) Slash the line and close a part of the waist dart

(c) Add 1-11/2 inches on the side seam.

(d) Blend till hip level for both front and back. (Along with relevant figures).

9754.

By using measurement method, convert two dart skirt into one dart skirt, with the help of a neat figure.

Answer»

Take two dart skirt sloper. Measure the dart towards the side seam and add the measurement to the one which is towards CF/CB and eliminate the 2nd dart. The length of new dart is to be 5.5 inches. (Along with relevant figure)

9755.

Sanya has abnormally large hip i.e. 46 inches and bust 36 inches. Suggest a garment size/silhouette that can accommodate her abnormal body measurement.

Answer»

Sanya would need to pick a size that accommodates larger measurement i.e. according to hip.

Silhouette- A-line flared or tent.

9756.

Give reason for fabrics like linen and fine cotton being more in trend for men’s casual wear garments.

Answer»

Linen and cotton provide comfort, flexibility and air absorption for use over long working hours.

9757.

Show a step to convert basic bodice block into sleeveless bodice, with a help of neat figure.

Answer»

Using basic bodice block, go up by ½ inches on the armhole level. (along with relevant figure)

9758.

Show and write steps to convert basic bodice block into sleeveless bodice.

Answer»

In basic bodice, go up ½ inch on the armhole level. (Along with a relevant figure).

9759.

What will happen if the hemline remains unbalanced in a skirt?

Answer»

Skirt swing forward or backwards, towards the side that is smaller.

9760.

Who is known as ‘Minister for fashion’?

Answer»

Rose Bertin is known as ‘Minister for fashion’.

9761.

Name any one capital city of Mughal Empire.  

Answer»

 Capital city of Mughal Empire.- 

Agra, Lahore, Delhi Fatehpur Sikri- Anyone to be mentioned 

9762.

Write an essay on illiteracy in about 150 to 200 words.

Answer»

The word 'literacy' means an ability to read and write. In a civilized country, every citizen should learn how to read and write. If not, he is called an illiterate person. An illiterate person has to face many practical difficulties in life.  

As he is unable to read or write, he cannot read a letter addressed to him by his near and dear ones. He cannot calculate his own income and expenses, nor can keep his own accounts. Morally and psychologically, he feels insecure and weak, and hence suffers from an inferiority complex.  

Therefore, every person in the society should try to become literate. If it was not possible in an early age, a grown-up man can yet learn how to read and write in his advanced stage of life. Literacy will help him also in gaining common knowledge in various subjects, which will make him a "complete man".  

An illiterate man is generally exploited by the clever men in the society. They take full advantage of his ignorance of the language or wisdom. The illiterate men become like dancing dolls at the hands of the clever persons. They suffer in many ways in life.  

Now-a-days, the Indian governments have taken a litera­cy drive all over the country. They are sending teachers into the remote corners of the villages of India in order to educate the people, irrespective of their age or profession.  

The programme of education has taken a bold step, and the results are encouraging. The students and the educated youth should come forward to join the literacy movement since launched by the government of India.  

Classes can be held in a primary school or in any other suitable place that is available in the area chosen for literacy movement. Teaching can be arranged in the morning or in the evening.  

The students may be peasants, mill workers, or traders, the poor or the rich. Education must be free and voluntary. The students are to be supplied with the books, and taught first how to read them, and then, how to write the scripts, imitating the printed letters in the books.  

It has been seen that the people of India have remark­ably responded to this drive, and shown great interest in adult education, apart from the education of the young ones.  

The percentage of literate persons in India has considerably increased in comparison with the figures of the earlier years. It is found that in the villages, the young and the old men and women assemble and sit together to take lessons from the teachers who have been specially trained and appointed for the purpose of teaching the illiterate mass.  

The students should also come forward voluntarily to actively participate in this noble literacy drive and make their country free from the curse of illiteracy.

9763.

If two objects of different masses have same momenta. Then find the ratio of their kinetic energies.

Answer»

as per me the answer i got is 1:1 by this process     
k.e=1/2mv2   =   pv/2    

therefore , the ratio of the bodies is pv/2 ÷  pv/2 = 1:1 
9764.

How did Douglas overcome his fear of water?

Answer»

After his misadventure in the pool at the Y.M.C.A. Douglas realised that his fishing trips, canoeing, swimming and boating were over. Finally he decided to engage an instructor to learn to swim and overcome his fear. He went to the pool and practised five days a week. The instructor put a belt around him and a rope was attached to the belt. The rope went through a pulley that ran on an overhead cable. Douglas held one end of the rope and went back and forth across the pool. On each trip some of the terror would seize him. After three months, the tension began to decrease. 

He taught him to put his face under water and exhale. He also learnt how to raise his nose and inhale. Now he was able to shed part of the fear that seized him under water. He went to Lake Wentworth Triggs island. He swam two miles across the lake. He shouted with joy as he had conquered his fear of water afterall.

9765.

Justify the title of lesson, ‘Lost Spring’.

Answer»

‘Lost Spring’ by Anees Jung describes two stories of stolen childhood. Millions of children in India, instead of spending their days in schools and playgrounds waste their childhood in ragpicking or hazardous industries. Childhood is the spring of life. But millions of unfortunate children like Saheb and Mukesh waste this spring either in the garbage of Seemapuri or in the blast furnaces of Firozabad. The best part their life, their childhood is lost to the demands of survival. Hence, the title is quite apt.

9766.

One must respect one’s identity and not compromise with it at any cost. Roger Skunk’s mother does not like her son smelling of roses. Do you justify her stand?

Answer»

Roger Skunk smelled very badly. All little animals kept themselves away from him. None of them would play with him. They teased him calling him ‘Stinky Skunk’. Poor little Roger would stand alone and weep. The wizard listened to his woeful tale and made him smell like roses. This was the smell that Roger Skunk liked so much. Now the attitude of all other little animals also changed. They gathered around him played tag, baseball football and hockey together. 

Roger Skunk’s mother did not like her son smelling of roses. She went right back to that ‘awful wizard’ and hit him hard on his head. The wizard made Roger Skunk smell very bad again. Roger Skunk’s mommy was not ‘stupid’ as Jo would think her to be. She believed that Roger’s God given identity should not be compromised under peer pressure. Also true friendship does not care for appearances.

9767.

Describe in your own words, the village of Raveloe. List some of the differences between Raveloe and Lanter Yard.

Answer»

Raveloe : Class- conscious society, social line between rich and poor clearly defined Villagers tided together by a common church, New Year's dance at Red House etc. People adjusted and fairly satisfied 

Lantern Yard :

Tight-knit religious sect, a community of faith, held together by narrow religious beliefs and superstitions

9768.

Do you think Jack shared an affinity with Roger Skunk? Explain.

Answer»
  • Jo’s constant question and her non acceptance of Jacks’ ending of the story appears to be a threat to his authority
  • He believes that adults know best!
  •  Jack feels threatened by Jo’s attitude and when he finds that she is restless after he has come downstairs, he uses the ultimate weapon of adult authority-does she want him to spank her, he asks. 
  • Reminded of his own upbringing-Mother is always right
  • the message is clear- adults know best
9769.

What disadvantages does Griffin face because of his invisibility?

Answer»
  • He soon discovered that being invisible had as many drawbacks as advantages.
  • People ran into him and stepped on him.
  • He had to be continually on guard as to the movements and positions of others in order to avoid accidental contact.
  • although people could not see him, dogs could detect him with their keen sense of smell.
  • As he had to remain naked, he was soon uncomfortable.
  • Also, he could not eat, as food was visible until it was fully assimilated into his system.
  • At one point, he had run up the steps of a house in order to avoid a unit of a marching Salvation Army band. While he waited, two youngsters spotted the prints of his bare feet in the mud. Soon a crowd of people had gathered to look at the “ghost prints.” He leapt over the railing and ran through a bunch of back roads to avoid the press. 
9770.

What kind of life did Silas lead before coming to Raveloe?

Answer»

Before coming to Raveloe Silas was a respected member of a church at Lantern Yard. He had a close friend named William Dane, and he was engaged to marry a serving girl named Sarah. But one day the elder deacon fell ill and had to be tended day and night by members of the congregation. During Silas’ watch on the deacon, a bag of money disappeared from a drawer by the deacon’s bed. Silas’ knife was found in the drawer, but Silas swore that he was innocent and asked that his room be searched. The empty bag was found there by William Dane. Then Silas remembered that he had last used the knife to cut a strap for William, but he said nothing to the others.

The church members resorted to prayer and drawing of lots, and the lots declared Silas guilty. Silas, betrayed by his friend and now by his God, feels crushed. He soon received word from Sarah that their engagement was ended, and a month later she married William Dane. Soon afterward Silas left Lantern Yard.

9771.

How do both the thefts determine Marner’s interaction with the people of Raveloe?

Answer»
  • Theft in lantern yard destroys Marner’s faith in humanity 
  • moves to Raveloe 
  • leads a lonely frugal existence 
  • does not interact with the people of Raveloe
  • spends all his time weaving and making gold
  • Theft at Raveloe makes him seek out the people of the village
  • once again seeks solace in company
9772.

"Democracy is a better form of government than any other form of government." Justify the statement.

Answer»

Democracy is a better form of government from any other form of government:

(i)  Democracy promotes equality among citizens

(ii)  Enhances the dignity of the individual

(iii)  Improves the quality of decision making

(iv)  Provides method to resolve conflicts

(v)  Allows room to correct mistakes

(vi)  Accountable, responsive and legitimate government

(vii)  Reduction of inequality and poverty

(viii)  Accommodation of social diversity

9773.

"Democracies do not appear to be very successful in reducing economic inequalities." Justify the statement.

Answer»

It is true. The following points justify that:

(i)   A small number of ultra-rich enjoy a disproportionate share of wealth and income. Not only that, their share in the total income of the country has been increasing.

(ii)  Those at the bottom of the society have very little to depend upon. Their incomes have been declining. 

(iii)  Sometimes, they find it difficult to meet their basic needs of life, such as food, clothing, housing, education and health. In actual life, democracies do not appear to be very successful in reducing economic inequalities.

9774.

Differentiate between ruling and opposition parties.

Answer»

The party which wins the majority of seats in the election and forms a government is known as the ruling party whereas the party which is not able to get the majority seats is known as the opposition party.

9775.

How can the industrial pollution of fresh water be reduced ? Explain various ways.

Answer»

After independence, industries are increasing in a rapid pace and have become a reason for pressure on existing fresh water resources. Fresh water is almost limited, though renewable in India, but over-exploitation and mismanagement of this resource by industries are aggravating the water stress day-by-day.

(i)  Industries especially heavy industries use huge amount of fresh water for industrial purpose and pollute and waste such water.

(ii)  These industries for their energy consumption purpose depend on hydroelectric projects and this electricity is generated through damming the rivers upstream. So, the river almost dries in the lower stream areas.

(iii)  Again industries dump the chemical waste in the river, lake, etc. which then consequently pollute the water dangerously for human survival.

These also contaminate the groundwater through seepage of industrial wastes. So, the increasing number of industries exert pressure on existing fresh water resources.

9776.

Classify industries on the basis of raw materials.

Answer»

(i) Agro-Based Industries

(ii) Mineral Based Industries

(iii) Marine Based Industries

(iv) Forest-Based Industries

9777.

How can the industrial pollution of fresh water be reduced?

Answer»

Industrial pollution of fresh water can be reduced by the following methods: 

(i) Minimising use of water for processing by reusing and recycling it in two or more successive stages. 

(ii) Treatment of hot water and affluents before releasing them in rivers and ponds.

9778.

Mention the views of the Federation of the Indian Chamber of Commerce and Industries (FICCI) towards the Civil Disobedience Movement.

Answer»

(i) FICCI supported the Civil Disobedience Movement for criticising the colonial control over the Indian economy. 

(ii) FICCI believed that through the force of this movement and self determination would end the colonial restrictions on business.

9779.

Name the phenomenon that governs the following: -i) Green beetles living in green bushes are not eaten by the crows. ii) Number of blue beetles in green bushes increases, only because the red beetles living there were trampled by a herd of elephants.iii) No ‘medium height plants’ are obtained in F1 generation, upon crossing pure tall and dwarf pea plants. iv) Tails of mice were surgically removed for several generations; still mice had tails in the following generations. v) A migrant beetle reproduces with the local population; as a result genes of migrant beetle enter the new population.

Answer»

i) Natural selection

ii) Genetic drift 

iii) Law of Dominance 

iv) Acquired characters are not inherited 

v) Gene flow

9780.

What are fossils and how is age of fossils determined?

Answer»

Body or its parts that are not decomposed/preserved traces of organisms. (to begin with new line) 

  • Upon digging the earth, the fossils that are found closer to the surface are more recent than the fossils in deeper layers.
  •  By detecting the ratios of different isotopes of the same element in the fossil material. 
9781.

What is meant by the term ‘power of accommodation’? Name the component of eye that is responsible for the power of accommodation.

Answer»

Power of accommodation: It is the ability of the eye lens to adjust its focal length. Ciliary muscles of eye are responsible for change in its focal length.

9782.

During artificial selection, which features of wild cabbage were selected to give rise to i) Cabbage ii) Cauliflower.

Answer»

i) by selecting very short distances between leaves. 

ii) by selecting sterile flowers.

9783.

Explain why 13233343563715 is a composite number?

Answer»

The given number ends in 5. Hence it is a multiple of 5. Therefore it is a composite number.

9784.

Are two triangles with equal corresponding sides always similar ?

Answer»

No, Angle included should be same.

9785.

A letter of English alphabet is chosen at random. Determine the probability that the chosen letter is a consonant.

Answer»

In English language there are 26 alphabets.

Consonants are 21. 

The probability of chosen a consonant = 21/26

9786.

The diameter of a wheel is 1.26 m. What the distance covered in 500 revolutions?

Answer»

Distance covered in 1 revolution = circumference of wheel

= πd 

 = π × 1.26 m.

Distance covered in 500 revolutions 

 = 500 × π × 1.26 

 = 500 × 22/7 × 1.26 

 = 1980 m

9787.

If f(x) = 27x3 and g(x) = x1/3 , find gof(x).

Answer»

Given f(x) = 27x3 and g(x) = x1/ 3 
(gof) (x) = g [f(x)] = g [27x3] = [27x3]1/ 3 = 3x

9788.

Explain the break-down voltage in Zener diode.

Answer»

It is that applied reverse voltage at which the reverse current becomes suddenly very large (without further appreciable change in reverse voltage)

9789.

If \(\vec a= \hat i + \hat j + \hat k, \,\vec a .\,\vec b = 1 \) and \(\vec a \times \vec b = \hat j - \hat k\), then find \(|\vec b|\).

Answer»

\(\vec a = \hat i + \hat j + \hat k\)

Let \(\vec b = b_1\hat i + b_2\hat j + b_3 \hat k\)

\(\therefore \vec a . \vec b = 1\)

⇒ \((\hat i + \hat j + \hat k). (b_1 \hat i + b_2 \hat j + b_3 \hat k)=1\)

⇒ \(b_1 + b_2 + b_3 = 1\)     .....(1)

\(\vec a \times \vec b = \hat j - \hat k\)

⇒ \(\begin{vmatrix}\hat i &\hat j&\hat k\\1&1&1\\b_1&b_2&b_3\end{vmatrix} = \hat j - \hat k\)

⇒ \(\hat i (b_3 - b_2) + j(b _1 - b_3 )+ \hat k (b_2 - b_1) = \hat j - \hat k\)

\(\therefore b_3 - b_2 = 0 \)

⇒ \(b_3 = b_2\)     .....(2)

\(b_1 - b_3 = 1\)

⇒ \(b_1 = 1 + b_3\)     .....(3)

\(b_2- b_1 = -1\)       .....(4)

⇒ \(b_2 - (1 + b_3 ) = -1\)

⇒  \(b_2 - 1- b_3 = -1\)

⇒ \(b_2 = b_3\)

From (1) & (2),

\(b_1 + 2 b_2 = 1\)       ......(5)

From (2), (3), (5), we get

\(1 + b_3 + 2b_3 = 1\)

⇒ \(3b_3 = 0\)

⇒ \(b_3 = 0\)

\(\therefore b_2 = 0\)      (From(2))

\(\therefore b_1= 1\)      (From(1))

Hence,

\(b_1 = 1 , \, b_2 = 0, \, b_3 = 0\)

\(\therefore \vec b= \hat i\)  & \(|\vec b = 1|\)

9790.

Evaluate:\(\int\limits_{0}^{\frac{\pi}4} \frac{dx}{1 + tan x }\)

Answer»

Let \(I = \int\limits_{0}^{\frac{\pi}4} \frac{dx}{1 + tan x }\)

⇒ \(I = \int\limits_{0}^{\frac{\pi}4} \frac{dx}{1 + tan (\frac {\pi}4- x) }\) 

\(\left(\because \int\limits_a^b f(x) dx = \int\limits^b_af(a + b - x)dx\right)\)

⇒  \(I = \int\limits_{0}^{\frac{\pi}4} \frac{dx}{1 + \cfrac{tan\frac{\pi}4 - tanx}{1 + tan\frac{\pi}{4}tanx} }\)

\(= \int\limits_{0}^{\frac{\pi}4} \frac{dx}{ \cfrac{2 + tanx + 1 - tanx}{1 + tanx}}\)      \(\left(\because tan \frac{\pi}{4} = 1\right)\)

\(= \int\limits_{0}^{\frac{\pi}4} \frac{1 + tan x }{2}dx\)

\(= \frac12 [x + log\, secx] ^{\frac{\pi}4}_0\)         \((\because \int tan x \,dx = log\,secx)\)

\(= \frac 12 \left[\left(\frac{\pi}{4} - 0\right) + log \left(sec\frac{\pi}{4}\right) - log\,sec 0\right]\)

\(= \frac12 \left(\frac{\pi}{4} + log \sqrt 2 - log \,1\right)\)

\(= \frac 12 \left( \frac{\pi}{4} + \frac12 log2\right)\)              \((\because log 1 = 0)\)

\(= \frac{\pi}6 + \frac14 log2.\)

9791.

A box B1 contains 1 white ball and 3 red balls. Another box B2 contains 2 white balls and 3 red balls. If one ball is drawn at random from each of the boxes B1 and B2, then find the probability that the two balls drawn are of the same colour.

Answer»

\(P\left(\frac{W}{B_1}\right) = \frac14\)

\(P\left(\frac{R}{B_1}\right) = \frac34\)

\(P\left(\frac{W}{B_2}\right) = \frac25\)

\(P\left(\frac{R}{B_2}\right) = \frac35\)

Probability that both drawn ball from boxes B1 & B2 are of same colour

\(= P\left(\frac{W}{B_1}\right) P\left(\frac{W}{B_2}\right) + P\left(\frac{R}{B_1}\right) P\left(\frac{R}{B_2}\right)\)

\(= \frac 14 \times \frac 25 + \frac 34 \times \frac 35\)

\(= \frac2 {20 } + \frac 5 {20}\)

\(= \frac{11}{20}\)

9792.

What is angiosperm?

Answer»

Angiosperms are vascular plants with stems, roots, and leaves. The seeds of the angiosperm are found in a flower. These make up the majority of all plants on earth. The seeds develop inside the plant organs and form fruit. Hence, they are also known as flowering plants.

Angiosperms are the most advanced and beneficial group of plants. They can grow in various habitats as trees, herbs, shrubs, and bushes.

9793.

Name the bases present in RNA. Which one of these in not present in DNA?

Answer»

The bases present in RNA are adenine (A), guanine (G), cytosine (C) and uracil (U). Uracil is not present in DNA.

9794.

For the complex [Fe(en)2 Cl2] Cl, identify the following:(i) Oxidation number of iron.(ii) Hybrid orbitals and shape of the complex.(iii) Magnetic behaviour of the complex.(iv) Number of its geometrical isomers.(v) Whether there may be optical isomer also.(vi) Name of the complex.

Answer»

(i) [Fe (en)2Cl2]Cl

x + 0 x 2 + (–1) x 2 + (–1) x 1 = 0        x =3

Oxidation number of iron = 3

(ii) d2sp3 hybridization, Octahedral

(iii) Paramagnetic

(iv) Two

(v) Yes, cis-[Fe(en)2Cl2]

(vi) Bis–(ethane-1, 2-diamine)–dichlorido iron (III) chloride

9795.

Explain the following:(i) The chemical reactivity of nitrogen is much less than that of phosphorus.(ii) SF6 is kinetically inert.

Answer»

(i) As N N triple bond (941.4 kJmol–1) is much stronger than p–p single bond (213 kJmol -1), therefore nitrogen is much less reactive than phosphorus

(ii) This is because in SF6 , sulphur is sterically protected by six fluorine atoms.

9796.

Name one chief ore each of copper and aluminium. Name the method used for concentration of these two ores.

Answer»
MetalChief oreMethod of concentration
CopperCopper pyrite (CuFeS2)Froth floatation
AluminiumBauxite [AlOx (OH)3–2x]
where 0 < x < 1
Leaching

9797.

Which compound in each of the following pairs will react faster in SN2 reaction with–OH? Why?(i) CH3Br or CH3I(ii) (CH3)3CCl or CH3Cl

Answer»

(i) CH3–I reacts faster than CH3–Br as iodine is a better leaving group because of its larger size.

(ii) CH3–Cl (1° halide) reacts faster than (CH3)3CCl (3° halide) since in case tertiary butyl chloride three bulky methyl group hinder the approaching nucleophile.

9798.

In the electrolysis of water (a) Name the gas collected at anode and cathode. (b) Why is the volume of gas collected at one electrode double than the other? (c) What would happen if dil. H2SO4 is not added to water? 

Answer»

(a) In the electrolysis of water, the gas collected at cathode is : Hydrogen

The gas collected at anode is : oxygen 

(b) The gas which is collected in double the amount during the electrolysis of water is Hydrogen. This is because water contains two parts of hydrogen element as compared to one part of oxygen element by volume. 

(c) Pure water is a bad conductor of electricity, by adding drops of sulphuric acid; we make it a good conductor of electricity.

9799.

Differentiate between the arrangement of elements in Mendeleev's periodic table and Modern periodic table

Answer»
S.noMendeleev’s periodic table                                     Modern periodic table.                                                                                                      
1The elements were arranged according to  increasing atomic masses.                   The elements were arranged according to increasing atomic masses.                                    
2Position of isotopes was not justified.                          There was no problem in the placing of isotopes.                                                                
3Position of hydrogen was not justified because it resembles both with alkali metals and halogens.                  Hydrogen has been given a unique position due to its resemblance with alkalis and halogens.           
9800.

Explain the ways in which glucose is broken down in absence of oxygen.

Answer»

There are two ways of anaerobic breakdown of glucose. First (in both ways) step is breakdown of glucose molecule into pyruvate which takes place in cytoplasm. 

█ The anaerobic breakdown in bacteria is called fermentation. During fermentation pyruvate is broken down to ethyl alcohol and carbon dioxide. 

█ When there is lack of oxygen in our muscle cells, pyruvate is broken down to lactic acid. 

Note: Very less amount of energy is released in both the above cases.