The benefits of being a member country of the WTO is limited for developing countries like India, because :
(i) Major volume of international trade occurs between the developed countries. Thus, the benefit to developing nations is limited.
(ii) The developing economies are forced to open up their markets for the developed countries but are not allowed access to the markets of the developed countries.

1. In a reaction, 5.3g of sodium carbonate reacted with 6 g of acetic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium acetate. Show that these observations are in agreement with the law of conservation of mass.

Sodium carbonate + acetic acid → Sodium acetate + carbon dioxide +  water

Solution:

Sodium carbonate + acetic acid → Sodium acetate + carbon dioxide +  water

5.3g                             6g                 8.2g     2.2g      0.9g

As per the law of conservation of mass, the total mass of reactants must be equal to the total mass of

products

As per the above reaction, LHS = RHS    i.e., 5.3g + 6g = 2.2g + 0.9 g + 8.2 g = 11.3 g

Hence the observations are in agreement with the law of conservation of mass.

wandering storytellers carrying scrolls (charanachitras) of cloth or paper with pictures on them and pointing to the pictures as they tell the story

Given: A ∆ XYZ in which ∠XYZ = 90°.

To prove: XZ² = XY² + YZ²

Construction: Draw YO ⊥ XZ

Proof: In ∆XOY and ∆XYZ, we have,

∠X = ∠X                             → common

∠XOY = ∠XYZ                     →  each equal to 90°

Therefore, ∆ XOY ~ ∆ XYZ   → by AA-similarity

⇒ XO/XY = XY/XZ               

⇒ XO × XZ = XY² ----------------- (i)

In ∆YOZ and ∆XYZ, we have,

∠Z = ∠Z                                     →            common

∠YOZ = ∠XYZ                             →            each equal to 90°

Therefore, ∆ YOZ ~ ∆ XYZ           →            by AA-similarity

⇒ OZ/YZ = YZ/XZ                 

⇒ OZ × XZ = YZ² ----------------- (ii)

From (i) and (ii) we get,

XO × XZ + OZ × XZ = (XY² + YZ²)

⇒ (XO + OZ) × XZ = (XY² + YZ²)

⇒ XZ × XZ = (XY² + YZ²)

⇒ XZ ² = (XY² + YZ²)

On 4th January, the mental condition of the voyagers was vacillating between hope and despair. After 36 hours of continuous pumping, water had receded but they still had to keep pace with the water still coming in. The captain's wife provided them with the first meal in two days of some corned beef and cracker biscuits. However, this respite was only short-lived. The storm started building up and the situation again became worse. On 5th January, the situation was desperate. When the captain went to his children to comfort them, the small boy asked him innocently if they all were going to die but added that he did not mind dying as long as all were the family members were together. This strengthened the captain's determination to fight all odds and survive.  

On January 4 and 5 the voyagers felt relieved as after the continuous pumping for 36 hours the water had nearly been drained out. They had their first meal in almost two days. However their respite was short-lived. They faced dangerous situation on January 5 as the sea got worse during the night. Fear of death loomed large. They were under a great mental stress.

A three digit number is to be formed from given 9 digits 1,2,3,4,5,6,7,8,9.
□□□HTO

⇒Now, there are 9 ways to fill Ones place.

⇒Since repetition is not allowed, so Tens place can be filled by the remaining 8 digits.
So, tens place can be filled in 8 ways.

⇒Similarly, to fill Hundreds of places, we have 7 digits remaining.
So, hundreds can be filled by 7 ways.

⇒So, the required number of ways in which three-digit numbers can be formed from the given digits is 9×8×7=504

A three digit number is to be formed from given 9 digits 1,2,3,4,5,6,7,8,9.
⇒Now, there are 9 ways to fill Ones place.

⇒Since repetition is not allowed, so Tens place can be filled by the remaining 8 digits.
So, tens place can be filled in 8 ways.

⇒Similarly, to fill Hundreds of places, we have 7 digits remaining.
So, hundreds can be filled by 7 ways.

⇒So, the required number of ways in which three-digit numbers can be formed from the given digits is 9×8×7=504

The Nuremberg trials were a series of military tribunals held by the Allied forces under international law and the laws of war after World War II. The trials were most notable for the prosecution of prominent members of the political, military, judicial and economic leadership of Nazi Germany, who planned, carried out, or otherwise participated in the Holocaust and other war crimes. The trials were held in the city of Nuremberg, Germany, and their decisions marked a turning point between classical and contemporary international law.

The factors responsible for the decline of the Roman Civilization are as followings :

1. Wars and Luxurious Life : Repeated wars and conquests bent and broke the back of democracy. The luxurious and easeful way of living demoralised the ruling class.

2. Slave Revolts : The number of slaves had out numbered the free men. They grew rebellious and could not be quelled by the ruling class.

3. The Weakness of Emperors : The Roman emperors being incompetent and weak could not face the invaders.

4. Spread of Christianity : The Christian religion gave meassage of love and equality. It weakened the rule of emperors since it created rebellions feeling among the slaves.

5. Raids and invasions : Invaders and raiders shattered the Roman Civilization.

HRD Minister Ramesh Nishank announced a major CBSE syllabus reduction for the new academic year 2020-21 on July 7 which was soon followed by an official notification by CBSE on the same.

Considering the loss of classroom teaching time due to the Covid-19 pandemic and lockdown, CBSE reduced the syllabus of classes 9 to 12 with the help of suggestions from NCERT.

The CBSE syllabus has been rationalized keeping intact the learning outcomes so that the core concepts of students can be retained.

Deleted syllabus of CBSE Class 12 Biology

• Prehistory: Time period in the past when there was no paper or the written word and hence no books or written accounts of events. Information about such an age is obtained from excavations which reveal paintings, pottery, habitat, etc.
• Drawings and paintings were the oldest form of artistic expression practised by humans. Reasons for such drawings: Either to decorate their homes or/and to keep a journal of events in their lives.
• Lower and Middle Palaeolithic Periods have not shown any evidence of artworks so far. The Upper Palaeolithic Age shows a lot of artistic activities.
• Earliest paintings in India are from the Upper Palaeolithic Age.
• The first discovery of rock paintings in the world was made in India by archaeologist Archibald Carlleyle in 1867 – 68 (in Sohagighat, Mirzapur District, Uttar Pradesh).
• Rock paintings have been found in the walls of caves at Madhya Pradesh, Andhra Pradesh, Uttar Pradesh, Bihar and Karnataka, some in the Kumaon Hills of Uttarakhand.
• Paintings at the rock shelters at Lakhudiyar on the banks of the Suyal River (Uttarakhand) –

1. 3 categories of paintings: man, animal and geometric patterns in black, white and red ochre.
2. Humans in stick-like forms, a long-snouted animal, a fox, a multiple-legged lizard, wavy lines, groups of dots and rectangle-filled geometric designs, hand-linked dancing humans.

• Paintings in Kupgallu (Telangana), Piklihal and Tekkalkota (both in Karnataka)

1. Mostly in white and red ochre.
2. Subjects are bulls, sambhars, elephants, sheep, gazelles, goats, horses, stylised humans and tridents.

(a) 3/5 = 3/ 5 × 6/6=18/30

(b) 3/5 =3/5 × 4/4 = 12/20 

The number of heptagon sides = 7

Since all the sides “a” of a regular heptagon are of equal measure, then the perimeter or circumference of a heptagon is written as,

The perimeter of a heptagon, P = 7a units

Gandhiji launched the Non-cooperation movement of 1921 because: 
According to Gandhiji , the British rule was established in India with the cooperation of Indians, and had survived only because of this cooperation. So time has arrived o withdraw cooperation to the British. 
First World War added to the misery of the Indian people. Heavy taxes, high prices, famines and epidemics made people's life miserable. 
Rowlatt Act invited large scale protests throughout the country. 
Jallianwala Bagh Massacre and the injustice done to Punjab made Indians angry which need to be avenged.
To restore the status of the ruler of Turkey. 
To bring Swaraj or Self Rule to India. 
Mahatma Gandhi declared that the main objectives of the non cooperation movement were : 
To cripple the British administration and make them realize that they cannot function without the actual support of the Indians. 
To avenge the wrong done by the Government in Punjab (Jallianwala Bagh Massacre) in a non violent way. 
To bring about unity among the people. To inculcate a sense of nationalism. 
To promote khadi and to attain Swaraj.

a N S W E R
Aditi' s grandmother used to tell her mythological stories about the river Yamuna. She referred the Yamuna as the favourite child of Surya, the Sun God.

 Aditi was shocked to find Yamuna heavily polluted. It was so polluted that it took them an entire day to clean the waste from the river Yamuna.

 Aditi's grandmother used to tell her mythological stories about the river Yamuna. She referred the Yamuna as the favourite child of Surya, the Sun God.

279404=2,00,000+70,000+9000+400+00+4

=2×100000+7×10000+9×1000+4×100+0×10+1
=2×10⁵+7×10⁴+9×10³+4×10²+0×10¹+4×1