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How many type of chemical reaction

Posted by Banty Kumari 3 years ago

CBSE > Class 10 > Science

3 answers

Tarun Sharma 3 years ago

7 types displacement,double dis., exothermic, endothermic, oxidation, reduction,dicomposition, combination, redox

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Jai Varsha 3 years ago

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Harshitha Harshitha 3 years ago

There are 7 types of chemical reactions.They are Combination reaction Exothermic reaction Endothermic reaction Decomposition reaction Displacement reaction Double Displacement reaction Precitation reaction

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Why is the variation beneficial to the species but not necessarily for the individual?

Posted by Anshika Sharma 3 years ago

CBSE > Class 10 > Science

3 answers

Priya Kumari 3 years ago

Because different species have different variations. They can not survive in high temperature but their individual can survive due to variations. E.g. Bacteria,their species survive in high tempt.but their parents can't survive . Because parents have not variations as their species.

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Jai Varsha 3 years ago

Because variations is different in different species. They cannot survive in high temperature bit their species does bcoz of variations. Ex: Bacteria, their species can survive in high temperature bcoz they have variations but their parent doesn't hace variations so the may die.

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Muzaif Ur Rahman 3 years ago

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Nikat drishti dosh aur dur drishti dosh me antar batao

Posted by Saloni Kumari 3 years ago

CBSE > Class 10 > विज्ञान

1 answers

Preeti Dabral 3 years ago

दूर दृष्टि दोष में व्यक्ति को पास की वस्तु स्पष्ट दिखाई नहीं देती है क्योंकि वस्तु का प्रतिबिम्ब रेटिना के पीछे बनता है। जबकि निकट दृष्टि दोष में व्यक्ति को दूर की वस्तु स्पष्ट दिखाई नहीं देती है क्योंकि वस्तु का प्रतिबिम्ब रेटिना से पूर्व ही बन जाता है।

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Sawpragan and parpragan me antar batao

Posted by Saloni Kumari 3 years ago

CBSE > Class 10 > विज्ञान

1 answers

Preeti Dabral 3 years ago

1. इस प्रक्रिया में किसी एक पुष्प के परागकणों का स्थानान्तरण उसी पुष्प के वर्तिकाग्र (स्वयुग्मन) अथवा उसी पौधे पर उत्पन्न अन्य पुष्प के वर्तिकाग्र पर (स्वजात युग्मन) होता है।
2. इस प्रक्रिया में भाग लेने वाले पुष्पों के परागकोष और वर्तिकाग्रों के परिपक्र होने का समय एक ही होता है।
3. बन्द पुष्पी अवस्था में स्वपरागण की प्रक्रिया ही संभव है।
4. स्वपरागण के लिए बाहरी साधनों अथवा माध्यम की जरुरत नहीं होती।
5. यह पौधे के लिए मितव्ययी विधि है।
6. इस प्रक्रिया के द्वारा लक्षणों की शुद्धता बनी रहती है।
7. स्व परागण के द्वारा व्यर्थ अथवा हानिकारक गुणों की सन्तति पौधों से हटाना संभव नहीं है।

पर परागण (cross pollination)
1. यहाँ परागकणों का स्थानान्तरण , उसी प्रजाति के अन्य पौधों के वर्तिकाग्र पर होता है , (पर युग्मन)
2. सामान्यतया यहाँ परागकोष और वर्तिकाग्र भिन्न भिन्न समय पर परिपक्र होते है।
3. परपरागण के लिए पुष्प का खुला होना अनिवार्य होना है।
4. परपरागण के लिए जैविक अथवा अजैविक बाहरी माध्यम अथवा साधन की आवश्यकता होती है।
5. इसमें पौधे को असंख्य परागकणों के अतिरिक्त कुछ अन्य साधनों जैसे रंग गंध और मकरंद आदि का भी उत्पादन करना होता है अत: यह मितव्ययिता के विपरीत है।
6. इस प्रक्रिया के द्वारा संकर अथवा विषम युग्मजी सन्तति उत्पन्न होती है। अतः लक्षणों की शुद्धता प्राप्त नहीं होती।
7. इसके द्वारा अनुपयोगी लक्षणों को आगामी सन्तति पीढ़ी से हटाया जा सकता है।

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Month having exactly 31 days

Posted by Harsh Rai 3 years ago

CBSE > Class 10 > Mathematics

4 answers

Piyush Maheshwari 3 years ago

There are 7 months that have 31 days January, March, May, July, August, October, December

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Vivek Prajapati 3 years ago

Nahi 32

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Aditya Raj 3 years ago

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Anshika Sharma 3 years ago

July, August January, March, May, July, August, October, December months have 31 days each. So, here July and august are the consecutive months having 31 days each.

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Marathi help

Posted by Jiya Ambekar 3 years ago

CBSE > Class 10 > Regional Language

2 answers

Dewanshu Dafe 3 years ago

Patra lekhan

1Thank You

Kᴀᴠɪᴛʜᴀ @ 3 years ago

I want Telugu as 2nd language

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What is enterpreneur

Posted by Naman Mittal 3 years ago

CBSE > Class 10 > Information Technology (402)

3 answers

Ashish Yadav 3 years ago

A person who starts a business a business at her own risk

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Gurry Sandhu 3 years ago

An entrepreneur is an individual who creates a new business, bearing most of the risk and enjoying most of the rewards.

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Sayeed Uzair 3 years ago

It is the person who has ability to take risks and start up his own business without a promising income.

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Mijbil the otter meets the little boy from the poem ball try to build an interesting conversation between the two of men

Posted by Parvez Khan 3 years ago

CBSE > Class 10 > English Language and Literature

1 answers

Rithika S 3 years ago

I don't get how an otter is going to build an conversation with a little boy. The last time I checked, otter's don't talk

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Mijbil the otter meets the little boy from the poem ball . Try to build an interesting conversation between the two of men

Posted by Parvez Khan 3 years ago

CBSE > Class 10 > English Language and Literature

1 answers

Parvez Khan 3 years ago

S67e7rurht

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If the refractive indices for water and diamond relative to air are 1.33 and 2.4 respectively, then the refractive index of diamond relative to water is-

Posted by Amani Sofiya 3 years ago

CBSE > Class 10 > Science

1 answers

Preeti Dabral 3 years ago

refractive index of diamond relative to water is

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Life history and work of nelson Mandela

Posted by Anshu Upadhayay 3 years ago

CBSE > Class 10 > English Language and Literature

0 answers

ANSWER

What according to the post master was unusual about the letter?

Posted by Pranju Wadaskar 3 years ago

CBSE > Class 10 > English Language and Literature

2 answers

Rdm 😈 3 years ago

The letter was addressed to God

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Priyanshu Sinhmar 3 years ago

How anybody have this much faith in God because it is impossible to get a direct help from God..

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About dbms

Posted by Vishal Jaiswal 3 years ago

CBSE > Class 10 > Information Technology (402)

1 answers

Muzaif Ur Rahman 3 years ago

Data base management system

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"The dams that were constructed to control floods have triggered floods". Analyse the statement.

Posted by Pearl S 3 years ago

CBSE > Class 10 > Social Science

1 answers

Chandni Gupta 3 years ago

The dams imbalance the flow of water

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Sohan painted the outside of a box on all sides except the bottom.If the cabinet measures 1m×2m×1.5m,how much surface did he paint ?

Posted by Aman Khan 3 years ago

CBSE > Class 10 > Mathematics

3 answers

Mangifera Indica 3 years ago

7msq

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Mangifera Indica 3 years ago

9msq

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Anshika Sharma 3 years ago

Total surface area of the cabinet = 2(l × b + b × h + h × l) Area of the cabinet that was painted = (Total surface area of the cabinet) - (Area of bottom of the cabinet) = 2(l × b + b × h + h × l) − l × b = 2(b × h + h × l) + l × b = 2 × (1 × 1.5 + 1.5 × 2) + 2 × 1 m² = 2 × 4.5 + 2 m² = 11 m²

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9.What is sustainable development? Why is the issue of sustainability important for development?

Posted by Vivek Kumar 3 years ago

CBSE > Class 10 > Social Science

1 answers

Divyansh Chandel 3 years ago

Sustainable is the development where development should take place without damaging the environment and future need for next generation

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State any three factors other than income that is important in life.

Posted by Vivek Kumar 3 years ago

CBSE > Class 10 > Social Science

3 answers

Princy Puri 3 years ago

The other factors than income is that a individual seek equal opportunity no discrimination respect etc..

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Chandni Gupta 3 years ago

Pollution free environment,safe and secure environment ,and respect

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Vivek Kumar 3 years ago

Though income is one of the most important aspects of our lives, there are other important things, such as: People also seek things like equal treatment, freedom, security and respect. Women need safe and secure environment to take up a variety of Jobs or run a business. People also need political rights. People seek a pollution-free environment.

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At the end of the nineteenth century, 80 percent of the total workforce in Europe was employed in the technologically advanced industrial sector

Posted by Angel Agrawal 3 years ago

CBSE > Class 10 > Social Science

0 answers

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Given that sin theta equal a upon b then cosec theta is equals to

Posted by Aridaman Singh Bhadauria 3 years ago

CBSE > Class 10 > Mathematics

2 answers

Hamza Ansari 2 years, 11 months ago

b/a

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Zaid Agha Khan 3 years ago

√b²-a²

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A road which is 7m wide surrounds a circular park whose circumference is 88m .Find the area if the road

Posted by Tanmay Anand 3 years ago

CBSE > Class 10 > Mathematics

2 answers

Gayatri Pathade 3 years ago

462msq

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Vanshika Zade 3 years ago

If the circumference of the road is 88 cm then its radius would be 44 cm

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Statement ( A ) (Assertion) : ( triangle A B C ) is an isosceles triangle right angled of ( C ), then ( A B^{2}=2 A C^{2} ).Statement ( R ) (Reason) : In right ( triangle A B C ), right angled at ( B , AC ^{2}=A B^{2}+B C^{2} )(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)(b) Both Assertion (A) and Reason (R) are the true and Reason (R) is not the correct explanation of Assertion (A)(c) Assertion (A) is true but Reason (R) is false(d) Assertion (A) is false but Reason ( (R) ) is true

Posted by Shubham Pathak 3 years ago

CBSE > Class 10 > Mathematics

1 answers

Sarika Maurya 3 years ago

Option (d) Assertion (A) is false but Reason (R) is true

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_you_in the same school in which radha_?

Posted by Surbhi Varshney 3 years ago

CBSE > Class 10 > English Language and Literature

0 answers

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What was the impact of technology on food availability?

Posted by Purvi Agarwal 3 years ago

CBSE > Class 10 > Social Science

1 answers

Shreya Mishra 3 years ago

Two examples from history to show the impact of technology on food availability were: Faster railways, lighter wagons and larger ships helped transport food more cheaply and quickly from production units to even faraway markets

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What are the practical questions according to CBSE 2023

Posted by Yuvankit Katyal 3 years ago

CBSE > Class 10 > Information Technology (402)