CBSE > Class 09 > Science | CBSE Board | Homework Help

Ask questions which are clear, concise and easy to understand.

Ask Question

What is aldehyde

Posted by Suhani Kumari 10 months, 2 weeks ago

3 answers

Archana Kanth 10 months, 2 weeks ago

any of a class of organic compounds in which a carbon atom shares a double bond with an oxygen atom, a single bond with a hydrogen atom, and a single bond with another atom or group of atoms

0Thank You

Mani Kavitha 10 months, 2 weeks ago

State archimedes principle

1Thank You

Mani Kavitha 10 months, 2 weeks ago

State the preventive and control measures used before grains are stored

0Thank You

ANSWER

Carbon dioxide produced by action of dilute hydrochloric acid on potassium hydrogen carbonate is moist whereas that produced by heating potassium hydrogen carbonate is dry. What would be the different in the composition of carbon dioxide in the two cases? state the associated law.

Posted by Surya Narayanan A.B 10 months, 2 weeks ago

CBSE > Class 09 > Science

1 answers

Himani Kumari 9 months, 3 weeks ago

Law of Constant Proportions.

0Thank You

ANSWER

Identification of parenchyma collenchyma and scan and clima tissue plants strips smooth and cardiac muscle fibres and love cells in animals from prepared slides draw their labelled diagram experiment

Posted by Tanu Singh 10 months, 2 weeks ago

CBSE > Class 09 > Science

2 answers

Khushpreet Kaur 10 months, 2 weeks ago

Above

0Thank You

Account Deleted 10 months, 2 weeks ago

Find on full marks or science ncert exemplar. It is clearly visible there. I think it helped you..

1Thank You

ANSWER

Find the weight of a body at a height equal to the radius of earth. The weight of body at the surface of earth is 200 Newton.

Posted by Anushka Gupta 10 months, 2 weeks ago

CBSE > Class 09 > Science

0 answers

ANSWER

Chemical formula of calcium sulphate

Posted by Sakshi Jaglan 10 months, 2 weeks ago

CBSE > Class 09 > Science

5 answers

Abhivarusha P 10 months, 2 weeks ago

CaSo4

0Thank You

Khushpreet Kaur 10 months, 2 weeks ago

Caso4

0Thank You

Ayush Mishra 10 months, 2 weeks ago

CaSo4

0Thank You

Keerthi Keerthi 10 months, 2 weeks ago

Caso4

0Thank You

Shreyash Reddy Mamidi 10 months ago

CaSO4

0Thank You

ANSWER

Aap bullet off 30 gram moving at 150 m second hits and sticks to a wooden block of 40 kg what is their combined velocity?

Posted by Kanha Sorout 10 months, 2 weeks ago

CBSE > Class 09 > Science

1 answers

Divya Pandey 10 months, 2 weeks ago

Help me to do

0Thank You

ANSWER

(a) while playing cricket Karan advice his friend Rohan not to catch the ball when it is high in the air (i) why did Karan advise him so? (ii) what value would you appreciate in karan's behaviour ( any two)

Posted by Kanha Sorout 10 months, 2 weeks ago

CBSE > Class 09 > Science

0 answers

ANSWER

Will increasing velocity the kinetic energy of the particle also

Posted by Yuvraj Shah 10 months, 2 weeks ago

CBSE > Class 09 > Science

5 answers

Deepak Chahal 10 months, 1 week ago

Increase

0Thank You

Nandhan Prince 10 months, 2 weeks ago

Increses

0Thank You

Kanha Sorout 10 months, 2 weeks ago

Increase

0Thank You

Divyansh Singh 10 months, 2 weeks ago

Increase

0Thank You

Yash Gautam 10 months, 2 weeks ago

Increase

0Thank You

ANSWER

Question and answer of chapter gravitation

Posted by Uday Dollin 10 months, 3 weeks ago

CBSE > Class 09 > Science

0 answers

ANSWER

Calculate the molecular mass of the following compounds. Given atomic masses of zn=65u,na=23u,cl=35.5u c=12u o=16u a)zncl2 b)na2co3

Posted by Tamanna Tamanna 10 months, 3 weeks ago

CBSE > Class 09 > Science

2 answers

Abhivarusha P 10 months, 2 weeks ago

a) 65×1+35.5×2 =65+71 =136u b) 23×2+12×1+16×3 =46+12+48 =106u

0Thank You

Anushka Gupta 10 months, 3 weeks ago

a).65*1+35.5*2 =65+71 =136u b).23*2+12*1+16*3 =46+12+48 =106u

0Thank You

ANSWER

Following figure shows three states of matter and its interconversion. Which process display in A and B?

Posted by Mm S 10 months, 3 weeks ago

CBSE > Class 09 > Science

1 answers

Mm S 10 months, 3 weeks ago

(a) fusion and (b) condensation

2Thank You

ANSWER

The kinetic energy of an object of mass m moving with velocity of 5 m per second is 25 joule what will be its kinetic energy when its velocity is doubled what will be its kinetic energy when its velocity is increased to three times

Posted by Krishna Tiwari 10 months, 3 weeks ago

CBSE > Class 09 > Science

0 answers

ANSWER

What is Tyndale effect

Posted by Aryan Thakur 10 months, 3 weeks ago

CBSE > Class 09 > Science

1 answers

Lanha Class10 10 months, 3 weeks ago

Scattering of light

0Thank You

ANSWER

If bromine atom is available in the form of , say , two isotopes 7/35 br (49.7%) and 81/35 br (50.3%) calculate the atomic mass of bromine atom

Posted by Deekshu Deekshitha 10 months, 3 weeks ago

CBSE > Class 09 > Science

0 answers

ANSWER

a cricket ball of mass 0.4 kg moving with a velocity of 72 km per hour to rest by a player what is the magnitude of the average force exerted by the player

Posted by Suraj Kumar Sah 10 months, 3 weeks ago

CBSE > Class 09 > Science

0 answers

ANSWER

the serial dilution of a solution of a coloured substance in water. A crystal of the substance is COMPLETELY dissolved in 100 mL water to form solution Q. 10 mL of solution Q on dilution to 100 mL. forms solution R. Solutions S and T are formed by further dilution. What volume of solution T contains the same number of particles of the coloured substance as 1ml of Solutin R

Posted by Pratham Goyal 10 months, 3 weeks ago

CBSE > Class 09 > Science

0 answers

ANSWER

Write the distribution of electrons in Carbon And Sodium atoms

Posted by Harshita Kumari 10 months, 3 weeks ago

CBSE > Class 09 > Science

2 answers

Vishal Kumar Prajapati Vishal Kumar 10 months, 3 weeks ago

Carbon 2,4 and sodium (Na) 2,8,1

3Thank You

Vinay Praja 10 months, 3 weeks ago

distribution of electrons in carbon atom is 6 = 2,4 Distribution of electrons in sodium atom is 11 = 2,8,1.

2Thank You

ANSWER

How many bones are in human body

Posted by Hritika Mhaske 10 months, 3 weeks ago

CBSE > Class 09 > Science

5 answers

Arshdeep Kaur 10 months ago

206 bones

0Thank You

Ayush Mishra 10 months, 2 weeks ago

206

0Thank You

Rishika Singh 10 months, 3 weeks ago

206

1Thank You

Vishal Kumar Prajapati Vishal Kumar 10 months, 3 weeks ago

206 bones in human body

0Thank You

Sradhesh Kumari 10 months, 3 weeks ago

206 bones

1Thank You

ANSWER

NAME three sub-atomi particles of an atom ?

Posted by Krishna Deshwal 10 months, 4 weeks ago

CBSE > Class 09 > Science

3 answers

Archana Kanth 10 months, 2 weeks ago

Electrons, protons, neutrons

0Thank You

Pinky Kumari 10 months, 4 weeks ago

Extra questions hai exam ke liye

0Thank You

Krishna Deshwal 10 months, 4 weeks ago

(i) Electron (ii) Protons (iii) Neutron

0Thank You

ANSWER

What are macro-nutrients and why are they called macro nutrients

Posted by Yuvi Viraj 10 months, 4 weeks ago

CBSE > Class 09 > Science

2 answers

Pinki Kumari 10 months, 4 weeks ago

Macro- nutrients are the nutrients which are requred for at a large amount in plants.like nitrogen,phosphorus. In this term 'macro' means need at a large amount ,so,it is called macro -nutrients.

3Thank You

Gautam Kumar 10 months, 4 weeks ago

What is biology

1Thank You

ANSWER

Why are manure and fertiliser used in fields

Posted by Taniya Aswani 11 months ago

CBSE > Class 09 > Science

2 answers

Ajay Kumar 10 months, 3 weeks ago

1nm=10-¹⁰m

0Thank You

Tarun Kumar 11 months ago

Manure and fertiliser used in fields because manure provides a fertility to the soil and they are made in fields.manure are made up of decomposition of animal excreta and plant waste Fertiliser provides us nitrogen, phosphorus,andpotassium.fertiliser are made in factories.and they are made up of chemicals. ex uria etc.

2Thank You

ANSWER

Diagram of heart

Posted by Hemant Kumar Ved 11 months ago

CBSE > Class 09 > Science

1 answers

Aroosha Noor Aroosha Noor 10 months, 4 weeks ago

https://in.pinterest.com/pin/511862313880229153/ - Shared via Bobble makemybobble.in/newtrendingshorts

0Thank You

ANSWER

What is the valency of helium

Posted by Swapnil Shroff 🇮🇳 11 months ago

CBSE > Class 09 > Science

5 answers

Funny Games 10 months, 4 weeks ago

Valency is 0 as its last shell is fullfill and it does not require more electrons

1Thank You

Ashwani Saini 11 months ago

0 Because helium is a Nobel gas .and every noble gas valency is 0

2Thank You

Tarun Kumar 11 months ago

0Thank You

Ashwani Saini 11 months ago

1Thank You

Samarth Bhagat 11 months ago

0 is the valency of helium

1Thank You

ANSWER

What property of an element determines its chemical behaviour?

Posted by Parth Tyagi 11 months ago

CBSE > Class 09 > Science

1 answers

Aroosha Noor Aroosha Noor 10 months, 4 weeks ago

The valency

1Thank You

ANSWER

Differentiate between green revolution and white revolution

Posted by Archana Acchu 11 months ago

CBSE > Class 09 > Science

4 answers

Dakshanshee Mittal 10 months, 3 weeks ago

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

Dakshanshee Mittal 10 months, 3 weeks ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

Samarth Bhagat 11 months ago

Green revolution is for the agriculture and White revolution is for the milk.

1Thank You

Rishi Bansal0 11 months ago

White revolution is large production of milk

0Thank You

ANSWER

Name the two nucleic acid present in a cell? What are there functions

Posted by Prithvi Pradeep 11 months ago

CBSE > Class 09 > Science