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Cbse science challenge

Posted by Sahil Kumai 2 years, 9 months ago

1 answers

Abhijeet Raeat 1 year, 9 months ago

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What is soil erosion ? What are the causes and suggest steps

Posted by Arpan Karwal 2 years, 9 months ago

CBSE > Class 10 > Social Science

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Prove 1 upon root 2 is irrational number

Posted by Amit Singh 2 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Aashika Bi 2 years, 9 months ago

Let 1/√2 be a rational number So 1/√2= p/q where p and q are co primes and q≠0 q/√2=p Squaring on both sides, q²/2=p² —(1) Here, q² is divisible by 2 so q is also divisible by 2 Let q=k Put value of q in equation (1) k²/2=p² Divide by 2 on both sides k²/4=p²/2 Here, p² is divisible by 2 so p is also divisible by 2 But we have assumed that p and q are co primes This contradiction has arisen due to our wrong assumption Hence 1/√2 is an irrational number

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(2x + 1) (x -3 )-(x- 1 )2

Posted by Balbir Singh 2 years, 9 months ago

CBSE > Class 10 > Mathematics

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What was the rowlatt act?

Posted by Anshraj Tiwari 2 years, 9 months ago

CBSE > Class 10 > Social Science

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Excess of everything is bad. Comment in the wake of Mrs. Pumphrey's love for tricki

Posted by Ridhima Negi 2 years, 9 months ago

CBSE > Class 10 > English Language and Literature

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6+ rotor of 5

Posted by Debajit Biswas 2 years, 9 months ago

CBSE > Class 10 > Mathematics

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The LCM of two number is 1200 which of the following cannot be there HCF

Posted by Anshika Shrivastava 2 years, 9 months ago

CBSE > Class 10 > Mathematics

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What does the poet seem to be perturbed about in second stanza

Posted by Aayush Jaiswal 2 years, 9 months ago

CBSE > Class 10 > English Language and Literature

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A pair of linear equations which has a unique solution

Posted by Tania Choudhary 2 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Bhawana Kewat 2 years, 9 months ago

Ans:- Intersecting Lines. a1\a2 unequal b1/b2

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Tania Choudhary 2 years, 9 months ago

Answer me

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Explain the process of excretion in plants

Posted by Kartik Senapati 2 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Devasish Singh 2 years, 9 months ago

Excretion is carried out in the plants in the following ways: The gaseous wastes, oxygen, carbon dioxide, and water vapor are removed through the stomata of leaves and lenticels of stems. Some waste products collect in the leaves and bark of trees. When the leaves and bark are shed, the wastes are eliminated.

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What means

Posted by Manish Patter 2 years, 9 months ago

CBSE > Class 10 > English Language and Literature

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Describe how a customer would benefit from the introduction of its website

Posted by Abhishek Lakhera 2 years, 9 months ago

CBSE > Class 10 > Computer Applications (165)

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Identify how and when to give feedback

Posted by Mannu David 2 years, 9 months ago

CBSE > Class 10 > Computer Applications (165)

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Do you think parents like Mrs.pumphery exist ? If yes , is it a good thing to pamper children ? Why and why not?

Posted by Medhansh Arya 2 years, 9 months ago

CBSE > Class 10 > English Language and Literature

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Akash wants to access the internet at his home. Which type of connection either dial up or lease line, will you suggest him and why

Posted by Seema Sonkar 2 years, 9 months ago

CBSE > Class 10 > Computer Applications (165)

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A fraction becomes 4 upon 5 if 2 is added both numerator and denominator if however 4 is subtracted from both numerator and denominator then the fraction becomes 1 upon 2

Posted by Madhukar Shende 2 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Sagar Kuntal 2 years, 9 months ago

Let numerator be x Let denominator be y (x+2)/(y+2)=4/5 5x+10=4y+8 x=(4y-2)/5........(i) (x-4)/(y-4)=1/2 2x-8=y-4 2x=y+4......(ii) By putting eq.i in ii 2(4y-2)/5=y+4 (8y-4)/5=y+4 8y-4=5y+20 3y=24 y=24/3 y=8 x =[4(8)-2]/5 x=30/5 x= 6 The fraction is 6/8 =3/4

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P(x)=3xsquare - x - 4 solve

Posted by Vidisha Rajwania 2 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Sagar Kuntal 2 years, 9 months ago

What do we do in this

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An aqueous solution of furious sulphate react with an aqueous solution of sodium hydroxide to form precipitate of furious hydroxide of sodium sulphate remain in solution

Posted by Balbir Singh 2 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Shital Aher 2 years, 9 months ago

The given reaction is an example of a double displacement reaction. Sodium(Na) is more reactive than iron (Fe) so it displaces Fe and forms a solution of Sodium sulphate and green coloured precipitate of Ferrous hydroxide. FeSO4 (aq)+ 2NaOH(aq)→ Fe(OH)2 (s) + Na2SO4 (aq)

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g(x)=a(x²+1)-x(2²+1) Find its zero and verify the relationship between zeroes and their coefficient

Posted by Anubhav Singh 2 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

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Chapter 1 exercise 1.1 5 questions

Posted by Vidisha Rajwania 2 years, 9 months ago

CBSE > Class 10 > Mathematics

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Chapter 18 ques no 1

Posted by Swapnil Kesarwani 2 years, 9 months ago

CBSE > Class 10 > हिंदी ए

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Chapter 10 ques no 1

Posted by Swapnil Kesarwani 2 years, 9 months ago

CBSE > Class 10 > हिंदी ए

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Explain all the types of the reaction and their types also inan easy language chemistry ch1

Posted by Tanisha Sinwer 2 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Shital Aher 2 years, 9 months ago

In chemistry, reactions are classified into different types based on the nature of reactants, products, and the way they react. Here are the most common types of chemical reactions: Combination or Synthesis Reaction: A combination reaction is when two or more substances combine to form a single new substance. For example, when hydrogen gas (H2) combines with oxygen gas (O2), they form water (H2O). The general equation for this type of reaction is A + B → AB. Decomposition Reaction: A decomposition reaction is the opposite of a combination reaction. In this type of reaction, a single substance breaks down into two or more simpler substances. For example, when water (H2O) is heated, it breaks down into hydrogen gas (H2) and oxygen gas (O2). The general equation for this type of reaction is AB → A + B. Single Replacement or Displacement Reaction: In a single replacement reaction, one element replaces another in a compound. For example, when zinc (Zn) metal is added to hydrochloric acid (HCl), it replaces hydrogen (H) in the acid to form zinc chloride (ZnCl2) and hydrogen gas (H2). The general equation for this type of reaction is A + BC → AC + B. Double Replacement or Displacement Reaction: In a double replacement reaction, two ionic compounds react and exchange ions to form two new compounds. For example, when sodium chloride (NaCl) is mixed with silver nitrate (AgNO3), they exchange ions to form sodium nitrate (NaNO3) and silver chloride (AgCl). The general equation for this type of reaction is AB + CD → AD + CB. Combustion Reaction: A combustion reaction is a type of reaction that involves the reaction of a substance with oxygen gas (O2), usually with the release of heat and light. For example, when methane (CH4) gas is burned in the presence of oxygen, it produces carbon dioxide (CO2) and water (H2O) vapor. The general equation for this type of reaction is fuel + O2 → CO2 + H2O + heat. These are the most common types of chemical reactions that you will encounter in your chemistry studies.

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What two symbolise did the sandstone ampetherater stand for ?

Posted by Viknesh J.T 2 years, 9 months ago

CBSE > Class 10 > English Language and Literature