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  • 2 answers

Yashika B. 5 years, 1 month ago

5.No. of elements placed in a particular period depends upon the fact that how electrons are filled into various shells.

Yashika B. 5 years, 1 month ago

1.Modern periodic table contains 18 vertical columns known as groups and 7 horizontal rows known as periods. 2.Elements in a group have the same number of valence electrons 3.No. of the shells increases as we go down the group. 4.Elements in a period have same number of shells.
  • 1 answers

Aanya Jain 5 years, 1 month ago

Mandel found that when the dwarf and tall plants are self pollinated the F1 progeny mainly consists of tall plants I ratio 3:1 and when the plants in F2 progeny are cross pollinated there were both tall and short plants in ratio 1:2:1
  • 3 answers

Mary Stuart 5 years, 1 month ago

No... It depends on how you prepare for ur exams

Apache ?? 5 years, 1 month ago

May be no

Laxmi S.P? 5 years, 1 month ago

May be god knows but our effort is much important
  • 1 answers

Prateeek Chauhan 5 years, 1 month ago

Because, if steel is used for making the core of an electromagnet, the steel does not lose all its magnetism when the current is stopped and it becomes a permanent magnet.
  • 5 answers

Nitish Kumar 5 years, 1 month ago

Organism are reproduce because it is for survival of species not for an organism

Shaneshraje Sandeep Kadu 5 years, 1 month ago

For the survival of species and for the continuation of its generation.

N D 5 years, 1 month ago

Organisms reproduce to make their generations survive for long period of time

Sahil Sinh 5 years, 1 month ago

For the species can survive for long time

Chetna Prakash 5 years, 1 month ago

So that their species survive for a long time...
Hep
  • 1 answers

Malaika Sharma 5 years, 1 month ago

???
  • 5 answers

Shaneshraje Sandeep Kadu 5 years, 1 month ago

No, Convex mirror cannot form a real image because the reflected rays joint behind the mirror.

Chetna Prakash 5 years, 1 month ago

Not at all...

Kaushlendra Pratap Singh 5 years, 1 month ago

No

Sadeep Santosh 5 years, 1 month ago

No

Alisha Afreen 5 years, 1 month ago

No
  • 4 answers

Nitish Kumar 5 years, 1 month ago

C2H4

Kaushlendra Pratap Singh 5 years, 1 month ago

C2H4 2H-C=C-2H

Sadeep Santosh 5 years, 1 month ago

C2H4

Amrita Kumari 5 years, 1 month ago

C2H4 is the molecular formula of ethene.
  • 3 answers

Shaneshraje Sandeep Kadu 5 years, 1 month ago

a) Oxygen is necessary for the survival of organisms. As it is needed by every aerobically respirating organism. b) It protects us from harm Ultraviolet Rays produce by sun. UV rays can be a cause of skin cancer.

N D 5 years, 1 month ago

a) Oxygen helps the living and non living factors to survive. b) Ozone prevents the direct sunlight rays to enter the earth . It allows only limited rays so that the species in earth can live happily.

Ayush Yaदव 5 years, 1 month ago

(a)oxygen
  • 4 answers

Nitish Kumar 5 years, 1 month ago

Dispersion of light

N D 5 years, 1 month ago

Splitting of white light into various components is called as Dispersion

Laxmi S.P? 5 years, 1 month ago

Refraction

Muduli Padmanav 5 years, 1 month ago

Refraction
  • 1 answers

Yashika B. 5 years, 1 month ago

1. Collection of water in ponds. 2. Construction of small earthen dams.
  • 3 answers

Shaneshraje Sandeep Kadu 5 years, 1 month ago

Oxygen (O2) is the gas released by plants during photosynthesis. It is released through stomatal pores by the process of Transpiration.

H X 5 years, 1 month ago

Oxygen and it is released by stomatal pores

Shashi Devi 5 years, 1 month ago

Co2
  • 1 answers

Nanditha Dev 5 years, 1 month ago

If you mean what we need do in art integrated project .. I can explain on my experience...we were given a particular topic eg; based on Himachal Pradesh. Everything related to Himachal Pradesh..like there traditional art,food,places to visit was brought in certain subjects..
  • 2 answers

Himani Chaudhary 5 years, 1 month ago

In multicellular organisms such as man, the volume of the human body is big and hence, oxygen cannot diffuse into all the cells of the human body quickly. ... Hence, diffusion is insufficient to meet the oxygen requirements of multicellularorganisms like humans.

Priya Dharshini 5 years, 1 month ago

Diffusion is insufficient of multicellular due to complex organs, such as humans have large volume. It take time to diffuse oxygen allover the body. So diffusion is insufficient
  • 2 answers

Himani Chaudhary 5 years, 1 month ago

Hemoglobin: The protein inside redblood cells (a) that carries oxygen to cells and carbon dioxide to the lungs ishemoglobin (b). Hemoglobin is made up of four symmetrical subunits and four heme groups. Iron associated with the heme binds oxygen. It is the iron inhemoglobin that gives blood its red color.

Anjali Malik 5 years, 1 month ago

It is a red coloured pigment who present in the blood . It is necessary to give red colour in blood
  • 2 answers

Aanya Jain 5 years, 1 month ago

Concave mirror-- 1) used in headlight of vehicles to get a powerful parallel beam of light 2) used as shaving mirrors 3) used by dentist to see large image of teeth 4) used in torches Convex mirror 1) rear view mirror as they always form erect and diminish images.Also they have the reflecting surface bulging outwards which give a wider field of view.

Mohak Ghosh 5 years, 1 month ago

concave mirror which is also called a converging mirror has its reflecting surface bulging inwards, i.e. away from the incident light. There are numerous uses of concave mirrors in daily life. It is used in the aircraft landing to guide the airplane, it is used as a torch to reflect the light rays, it is used during shaving to get an erect and enlarged image of the face, etc.
  • 4 answers

Tanvi Tomar 5 years, 1 month ago

Photosynthesis is an endothermic reaction because sunlight energy is absorbed during the process of photosynthesis by green plants

Harsh Pahadia 5 years, 1 month ago

Plz

Vartika Pandey 5 years, 1 month ago

Photosynthesis is considered as an endothermic reaction because in this process sunlight energy is absorbed by plants

Priya Dharshini 5 years, 1 month ago

Because energy is absorbed.
  • 3 answers

Kiran Kumari 5 years, 1 month ago

X=carbon Y=Graphite A=carbon monoxide B=carbon dioxide Z=diamond

Priya Dharshini 5 years, 1 month ago

X= carbon, Y= graphite, Z= diamond, A= Co ( carbon monoxide) B= CO2 Reaction of A with oxgen. 2Co+O2----->2 CO2

Vartika Pandey 5 years, 1 month ago

Please give me answer
  • 1 answers

Sunil Tyagi 5 years, 1 month ago

My cbsc guide app ma har sample paper ka solution ha okay friends
  • 5 answers

N D 5 years, 1 month ago

O2

Bhumi Kumari 5 years, 1 month ago

Oxygen fas is evolved during photosynthesis from stomata.

Laxmi S.P? 5 years, 1 month ago

Tq soo much for u r answers

Harshit Yadav 5 years, 1 month ago

Oxygen

Devanshu Gupta 5 years, 1 month ago

Oxygen which is evolved by stomata
  • 1 answers

Madhav Kumar 5 years, 1 month ago

1)znso4 +h2 is formed. It doesn't matter what you take between dust or granules of zinc because both are in solid state. 2)No reaction takes place because copper is less reactive than hydrogen. 3)Sodium zincate and hydrogen gas is formed. I hope you satisfied from this answer. THANKS.
  • 1 answers

Chetna Prakash 5 years, 1 month ago

The more energy we demand the environment has to fulfill it and that's why it affects our environment adversely
  • 1 answers
Please give me a ans
  • 5 answers

Aanya Jain 5 years, 1 month ago

Mendel used pea plant (pisum sativum) for his experiment because 1)available on many varieties. 2)Bisexual 3)Cheaper 4)Produces large number of offsprings 5)Easy to grow and manage 6)Can be true bred 7) shot life span

Madhav Kumar 5 years, 1 month ago

One other reason was that pea plant are self pollinating. So it is easy for him to reproduce next generation. I hope it is plus point for you.

Khushi - 5 years, 1 month ago

Mendel choose pea plants for variety of reasons :- i. Short life span ii. 7 pairs of contrasting traits iii. Easy to grow

Ashish Prakash Gupta Prakash 5 years, 1 month ago

Mendel chose pea plant for his experiment because the pea plant can produce a lot of variations in short term of time

Rahul Takar 5 years, 1 month ago

Mandel had choosed pea plant because it's life span is short , which we can identify many of its generation in short time , it's traits can be easily identifiable, so Mandel chose pea plant
  • 3 answers

Aanya Jain 5 years, 1 month ago

Planets don't twinkle as they are much closer to sun and this are seen as extend d sources If we consider a planet as a collection of several point sized sources of light then the light coming from every point sized source will average out to zero thus nullifying the twinkling effect.

Khushi - 5 years, 1 month ago

Planets do not twinkle as they are very close to us so the amount of light we perceive through them is much higher than the atmospheric refraction.

Aman Kumar 5 years, 1 month ago

Correct your English first!?
  • 3 answers

Tanvi Tomar 5 years, 1 month ago

22

Vaishnavi Gupta 5 years, 1 month ago

22

Ashish Prakash Gupta Prakash 5 years, 1 month ago

22

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