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5 properties of modern periodic table

Posted by Laxmi S.P? 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Yashika B. 4 years, 11 months ago

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

Yashika B. 4 years, 11 months 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.

ANSWER

What are his findings(Mendal) with respect to inheritance of F1 and F2 generation

Posted by Laxmi S.P? 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Aanya Jain 4 years, 11 months 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

ANSWER

Are boards easier than exams held in schools?

Posted by Vansh Sethi 4 years, 11 months ago

CBSE > Class 10 > Science

3 answers

Mary Stuart 4 years, 11 months ago

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

Apache ?? 4 years, 11 months ago

May be no

Laxmi S.P? 4 years, 11 months ago

May be god knows but our effort is much important

ANSWER

Five resistance are connected as shown in figure find the equivalent resistance between the points a and b for class 10th

Posted by Gohil Arjunsinh 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Aanya Jain 4 years, 11 months ago

Figure??

Nitish Kumar 4 years, 11 months ago

Where is the figure and question

ANSWER

Why is Steel not used for making the core of an electromagnet

Posted by Shiwani Kumari 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Prateeek Chauhan 4 years, 11 months 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.

ANSWER

Why do oganism reproduce

Posted by Krishna Chaudhary 4 years, 11 months ago

CBSE > Class 10 > Science

5 answers

Nitish Kumar 4 years, 11 months ago

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

Shaneshraje Sandeep Kadu 4 years, 11 months ago

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

N D 4 years, 11 months ago

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

Sahil Sinh 4 years, 11 months ago

For the species can survive for long time

Chetna Prakash 4 years, 11 months ago

So that their species survive for a long time...

ANSWER

Hep

Posted by Alisha Afreen 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Malaika Sharma 4 years, 11 months ago

???

ANSWER

Can convex mirror form real image. Explain?

Posted by Pratham Kumar 4 years, 11 months ago

CBSE > Class 10 > Science

5 answers

Shaneshraje Sandeep Kadu 4 years, 11 months ago

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

Chetna Prakash 4 years, 11 months ago

Not at all...

Kaushlendra Pratap Singh 4 years, 11 months ago

No

Sadeep Santosh 4 years, 11 months ago

No

Alisha Afreen 4 years, 11 months ago

No

ANSWER

Write the molecular formula of ethene and draw it's electron dot structure.

Posted by Waishnu Gani 4 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Nitish Kumar 4 years, 11 months ago

C2H4

Kaushlendra Pratap Singh 4 years, 11 months ago

C2H4 2H-C=C-2H

Sadeep Santosh 4 years, 11 months ago

C2H4

Amrita Kumari 4 years, 11 months ago

C2H4 is the molecular formula of ethene.

ANSWER

What is the total area for gaseous exchange in lungs of normal adult man?

Posted by Reha Khichdia 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Pratham Kumar 4 years, 11 months ago

80 m2

ANSWER

Benefits of biotic component of (a)oxygen (b) ozone

Posted by Laxmi S.P? 4 years, 11 months ago

CBSE > Class 10 > Science

3 answers

Shaneshraje Sandeep Kadu 4 years, 11 months 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 4 years, 11 months 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 4 years, 11 months ago

(a)oxygen

ANSWER

What are chromosomes? Explain how in sexually reproducing organisms the number of chromosomes is the progeny is maintained

Posted by Laxmi S.P? 4 years, 11 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Splitting of white light

Posted by Nanditha Dev 4 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Nitish Kumar 4 years, 11 months ago

Dispersion of light

N D 4 years, 11 months ago

Splitting of white light into various components is called as Dispersion

Laxmi S.P? 4 years, 11 months ago

Refraction

Muduli Padmanav 4 years, 11 months ago

Refraction

ANSWER

List any two traditional system of water harvesting?? 2 marks

Posted by Maheep Thugzz 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Yashika B. 4 years, 11 months ago

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

ANSWER

A gas is released during photosynthesis and state the way by which the gas is evolved

Posted by Laxmi S.P? 4 years, 11 months ago

CBSE > Class 10 > Science

3 answers

Shaneshraje Sandeep Kadu 4 years, 11 months ago

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

H X 4 years, 11 months ago

Oxygen and it is released by stomatal pores

Shashi Devi 4 years, 11 months ago

Co2

ANSWER

About art integrated project??

Posted by Himani Chaudhary 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Nanditha Dev 4 years, 11 months 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..

ANSWER

What is insufficient of multicellular

Posted by Subham Gite 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Himani Chaudhary 4 years, 11 months 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 4 years, 11 months 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

ANSWER

What is humeoglobin why is necessary for blood how humeoglobin work in blood which type gase in release

Posted by Subham Gite 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Himani Chaudhary 4 years, 11 months 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 4 years, 11 months ago

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

ANSWER

Uses of convex mirror and uses of concave

Posted by Rajaram Ahirwar 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Aanya Jain 4 years, 11 months 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 4 years, 11 months 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.

ANSWER

Why pohotosyntes is considered an endormic reaction

Posted by Shivani Nalawade 4 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Tanvi Tomar 4 years, 11 months ago

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

Harsh Pahadia 4 years, 11 months ago

Plz

Vartika Pandey 4 years, 11 months ago

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

Priya Dharshini 4 years, 11 months ago

Because energy is absorbed.

ANSWER

A non-metal X exists in two different forms Z and Y. Z is hardest natural substance, while Y is a good conductor of electricity. The non-metal X can form two oxides A and B. A is neutral whereas B is acidic. A is combustible whereas B puts off fire. Identify X, Y, Z, A and B. Also give reaction of A with oxygen and name the gas so formed.

Posted by Vartika Pandey 4 years, 11 months ago

CBSE > Class 10 > Science

3 answers

Kiran Kumari 4 years, 11 months ago

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

Priya Dharshini 4 years, 11 months ago

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

Vartika Pandey 4 years, 11 months ago

Please give me answer

ANSWER

Cbse class 10ka sample paper ka solution

Posted by Lovely Giri 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Sunil Tyagi 4 years, 11 months ago

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

ANSWER

Name the gas released during photosynthesis and also state by which the gas is evolved

Posted by Laxmi S.P? 4 years, 11 months ago

CBSE > Class 10 > Science

5 answers

N D 4 years, 11 months ago

O2

Bhumi Kumari 4 years, 11 months ago

Oxygen fas is evolved during photosynthesis from stomata.

Laxmi S.P? 4 years, 11 months ago

Tq soo much for u r answers

Harshit Yadav 4 years, 11 months ago

Oxygen

Devanshu Gupta 4 years, 11 months ago

Oxygen which is evolved by stomata

ANSWER

A student planned to prepare hydrogen gas in the laboratory by taking zinc granules and dillute sulphuric acid. What will happen if he uses : (i) same amount of zinc dust in place of zinc granules. (ii) same amount of copper in place of zinc. (iii) sodium hydroxide solution in place of sulphuric acid.

Posted by Vaibhav Pandey 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Madhav Kumar 4 years, 11 months 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.

ANSWER

How is the increase in demand for energy affecting our environment adversely

Posted by Lovely Kumari 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Chetna Prakash 4 years, 11 months ago

The more energy we demand the environment has to fulfill it and that's why it affects our environment adversely

ANSWER

All imp compound clour ch 1 class 10

Posted by Anushka ................. 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Anushka ................. 4 years, 11 months ago

Please give me a ans

ANSWER

Why mendel choose pea plant for his experiment? Heredity and evolution

Posted by Aman Kumar 4 years, 11 months ago

CBSE > Class 10 > Science

5 answers

Aanya Jain 4 years, 11 months 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 4 years, 11 months 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 - 4 years, 11 months 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 4 years, 11 months 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 4 years, 11 months 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

ANSWER

Explain why planets are don't twinkle

Posted by Usha Rani [email protected] 4 years, 11 months ago

CBSE > Class 10 > Science

3 answers

Aanya Jain 4 years, 11 months 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 - 4 years, 11 months 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 4 years, 11 months ago

Correct your English first!?

ANSWER

Out of the two ciruits shown herw , the two resiators R1and R2 have been correctly connector in series in

Posted by Yash Toor 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Yash Toor 4 years, 11 months ago

It is wrong answer

Yash Toor 4 years, 11 months ago

Circuit b only

ANSWER

what is the atomic number of titanium

Posted by Sri Vardhan Chalamala 4 years, 11 months ago

CBSE > Class 10 > Science

3 answers

Tanvi Tomar 4 years, 11 months ago

22

Vaishnavi Gupta 4 years, 11 months ago

22

Ashish Prakash Gupta Prakash 4 years, 11 months ago

22

ANSWER

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