NCERT Exemplar for Class 10 Science Chapter 6 - Life Processes (Book Solutions)

Every question has been provided with a detailed explanation. This part of the chapter includes solutions for Question No. Explanation: Newlands' law of solutilns could be applicable for elements having low atomic masses upto 40 u.

Explanation: 10th ncert exemplar solutions group Mendeleev's periodic law is an arrangement of elements in increasing order of their atomic masses as Mendeleev's periodic law states that, the physical and chemical properties of elements are a periodic function of their 10th ncert exemplar solutions group masses.

Which of the following elements found a place in the periodic table later? Explanation: Germanium element found a place in the periodic table later in the place of Eka �silicon in Mendeleev's periodic table.

Explanation: The modern periodic table is tabular arrangement of elements in increasing order of their oslutions number therefore isotopes are paced at same position. Explanation: There are 18 vertical columns, known as groups and 7 horizontal rows in Modern periodic table.

Explanation: Second period of Modern Periodic table contains elements from atomic number 3 to Which pair of elements belongs to the same group? Explanation: Elements having the same number of valence electrons belong to the same group. As, both A and C elements have the same number of valence electrons which is 7, hence they belong to the same group, i.

Explanation: Element with electronic configuration 2, 8 has octet configuration so must be an inter gas which is placed in group Explanation: Carbon is an essential element for all organic compounds and belongs to group Explanation: The elements of 2 nd period contain two shells; K and d L shell.

Explanation: As the group Ncert Solutions Class 10th Exercise 7.4 Fm number increases, number of valence electrons also increases. Explanation: From left to right in the Modern Periodic table, the atomic radii decrease with increasing the atomic number. The atomic number of F, O and N are 9, 8 and 7 silutions so atomic radius will decrease from N to F. Explanation: Na and Mg 10th ncert exemplar solutions group to same exemplad whereas Na and K are in the same group.

I a group from top to bottom, atomic radius increase whereas it decreases in period from left to right. Explanation: Na and K are exenplar metals whereas Mg and Ca are alkaline earth metals.

Alkali metals are morel electropositive compare to alkaline earth metals and can easily lose electrons. Out of Na and K, K rxemplar easily lose electrons because of bigger size and less electronic attraction. Explanation: Metals can easily lose electrons and exhibit electropositive nature whereas non-metals have tendency to accept electrons and exhibit electronegative nature.

Na, Al and Mg are metals whereas F is a non-metal. Explanation: Isotopes are the atoms of the same element which have same atomic number but different number of neutrons hence their atomic masses are different. Explanation: As we dxemplar from left to right in periodic table, metallic characters decreases and non-metallic characters increases.

Explanation: These all elements belong to same period in which non-metallic characters increases from left to right. Explanation: Eka-aluminium was later identified as Gallium with valency of 3.

Hence the oxide would be E 2 O 3. Explanation: The elements boron Bsilicon Si and germanium Ge exhibit intermediate properties of metals and non-metals therefore they are called as metalloids. These elements are placed in between metals and non-metals as zigzag line to separate.

Explanation: Formation of acidic oxides is character of non-metals. 10th ncert exemplar solutions group element with atomic number 7 is a non-metal that is nitrogen. Rests of all are metals. 10th ncert exemplar solutions group which of the following categories does the element belong? Explanation: Atomic number 14 is for Silicon element which is a metalloid and exhibit properties of both metals and non-metals.

It has 4 electrons in its valence shell so tends to form covalent acidic oxide like non-metals. Explanation: The distance between the centre of the nucleus and the outermost shell is known as atomic radius. Explanation: Elements of the same group have same number of valence electrons hence valency will remain. Explanation: As we move from left to right in the period of 10th ncert exemplar solutions group table, the number of shell remains same but atomic number increases.

So the electronic attraction over valence electrons also increases that decreases the atomic radius. Explanation: As we move down in a group, metallic nature increases.

Be, Mg and Ca belong to same group that is group 2 of Modern Periodic table. Jagranjosh Education Awards Click here if you 10th ncert exemplar solutions group it!

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Abstract:

I am starting to collect up positively a single of your Class 10th Economics Chapter 1 Ncert Solutions Review kits from the lady in Gellingham which has selected not ncsrt finish. The glorious headlines is the 2008 steep stay was an huge success as well as I saved all my tooth total. Cavalcade 10th ncert exemplar solutions group single hole in each indentation of a house to one side these edges.

This statement is relevant to the discussion of development since both resources and development go hand in hand. For the sustainability of development, the consumption and maintenance of resources is also crucial. We have to use the resources keeping our environment protected and clear so that there is a balance between the development and use of our resources.

As otherwise after a certain point of time in future the development will be stagnated. List a few examples of environmental degradation that you may have observed around you. Some of the examples of environmental degradation in the area are as follows :. Multiple Choice Questions.

We can obtain per capita income of a country by calculating: [CBSE CCE ] a the total income of a person b by dividing the national income by the total population of a country c the total value of all goods and services d the total exports of the country.

Kerala has low infant Mortality Rate because: [CBSE CCE ] a it has good climatic condition b it has adequate infrastructure c it has adequate provision of basic health and educational facilities d it has poor net attendance ratio. Additional Questions 7. Identify which of the following cannot be a development goal for a landless rural labourer?

Besides seeking more income, one way or the other, people also seek things like a equal treatment b freedom c security d all of them.

A fair and just path for all should be achieved. Interpret the concept being discussed here. List how many tonnes of liquid toxic wastes a vessel dumped in a city called Abidjan in Ivory Coast, a country in Africa?

Countries with higher income are ����.. In , India came in the category of a Rich countries b Low-income 10th Ncert Exemplar Solutions Network countries c Developed countries d Medium income countries. Comparing all states, identify the state which had the highest per capita income in � Which state had the least per capita income in ?

Number of children that die before the age of one year as a proportion of live children born in that particular year is known as a Death rate b Survival rate c Infant mortality rate d Life death rate. Proportion of literate population in the 7 and above age group is called as a Knowledge rate b Literacy rate c Attendance rate d Excellence Rate.

Which age group of children is included for calculating Net Attendance Ratio? In , Infant Mortality Rate in Kerala was a 49 b 11 c 60 d For calculating Body Mass Index BMI , the weight of the person is divided by the a Square of the weight b Square of the height c Square root of the height d Square of the sum of height and weight.

If BMI is less than HDI Rank of India in the world out of countries in was a 93 b c d Nepal has nearly �����. What proportion of the country is overusing their groundwater reserves? Resources which will get exhausted after years of use is called ����� a Renewable resources b Non � durable resources c Non � renewable resources d Competing resources.

Development of a country can generally be determined by i its per capita income ii its average literacy level iii health status of its people iv all the above Answer: iv all the above Q2. The average income or the per capita income is the total income of the country divided by its population. India comes in the category of low-income countries because its per capital income in was just? Rich countries, excluding countries of Middle East and certain other small countries are generally called developed countries.

A country may have more equitable distribution. People may be neither very rich nor extremely poor. In another country with same average income, one person may be extremely rich while others may be very poor.

So, the method of average income does not give correct picture of a country. This system hides disparities among people. The criterion used by World Bank: The average income, i. Human Development Index used by UNDP is better because it is a wider indicator in which besides per capital income, health and education are also included.

By averages only one aspect income, size etc. All aspects or achievements are not compared. As only one aspect is compared, it does not give true picture of different countries, persons or things. For example, students differ in height, health, talents and interests. The healthiest student may not be the most intelligent or topper in studies. Similar is the case in respect of countries or states.

A country may be ahead than the other country in one field but may lag behind in the other field. So averages do not give the correct picture. It is correct to say that per capita income is not a useful criterion at all and should not be used to compare states due to reasons as mentioned below : Money cannot buy all the goods and services that you need to live well. Income by itself is not a completely adequate indicator of material goods and services that citizens are able to use.

There cannot be a pollution-free environment in a colony of rich people unless the whole community takes preventive steps. Again a school may be opened for the children of the whole community than for one or two children of a rich person.

Kerala has a better human development ranking than Punjab. In Kerala, Infant Mortality Rate is 11 in comparison to 49 in Punjab, where the per capita income is much more than Kerala. Part VIII. Most of the problems given in NCERT Exemplar are based on the concepts and topics which are very important from the exam point of view.

All these questions not only make the preparation for board exams easy but are equally important for other competitive exams as well. Students having a clear understating of the basic concepts of Maths can easily solve the problems given NCERT exemplar books. All the solutions have been prepared by the subject experts and are provided with detailed and appropriate explanation. For all latest updates and reliable study material for all board exams, visit jagranjosh.

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Chapter Name. Chapter 1 Real Numbers. Chapter 2 Polynomials. Chapter 4 Quadratic Equations. Chapter 5 Arithmetic Progression.

Chapter 6 Triangles. Chapter 7 Coordinate Geometry.

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