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Gaurav Seth 5 years ago (2898529)

1) All the alkali metals are highly reactive elements since have a strong tendency to lose the single valence s-electron to form uni positive ions having inert gas configuration.

2) This reactivity arises due to their low ionisation enthalpies and high negative values of their standard electrode potential.

3) Due to their strong tendency to lose the single valence electron ,alkali metals also act as a strong reducing agents. Reactivity of an element is measured in terms of its reducing character.

4) Ionization enthalpy is a measure of the tendency of an atom to lose electrons in the gaseous state.Thus, lower the ionization enthalpy, greater is the tendency of an element to lose electron and hence stronger is the reducing character or higher is the reactivity of the element.

5)The ionization enthalpies of alkali metal decreases down the group, therefore, their reducing character or reactivity in the gaseous state increases from Li to Cs , i.e. Li< Na< K< Rb<Cs.

ANSWER

What's your goal in 12th boards? Mine : 98+ 10th percentage : 93

Posted by Dev ?? ? 5 years ago (2378599)

CBSE > Class 12 > Physics

3 answers

Aryan Singh 5 years ago (10159889)

110%

Saumya Singh 5 years ago (8803717)

Pawan Singhbaghel 5 years ago (6197845)

ANSWER

Entropy meaning?

Posted by Dev ?? ? 5 years ago (2378599)

CBSE > Class 12 > Chemistry

2 answers

Jyoti Yadav 5 years ago (9184611)

Degree of randomness

Gaurav Seth 5 years ago (2898529)

Entropy is a measure of randomness or disorder of the system.

The greater the randomness, higher is the entropy.

Solid state has the lowest entropy, the gaseous state has the highest entropy and the liquid state has the entropy in between the two.

Entropy is a state function. The change in its value during a process, is called the entropy change.

ΔS = S₂ -S₁ = ∑S _products – ∑S _reactants

1) When a system absorbs heat ,the molecules start moving faster because kinetic energy increases. Hence, disorder increases. More the heat absorbed ,greater is the disorder.

2) For the same amount of heat absorbed at low temperature, the disorder is more than at high temperature. This shows that entropy change is inversely proportional to temperature.

ΔS = q_rev / T

ANSWER

What is square of 65

Posted by Karan K U M A R 5 years ago (10140351)

CBSE > Class 09 > Mathematics

4 answers

Shailee Mathpal 5 years ago (10090720)

4225

Govind Sharma 5 years ago (9886061)

The square of 65 is 4225

Priya Dagar 5 years ago (9603840)

The square of 65 is 4225

Surjit Kaur 5 years ago (5513109)

The square of 65 is 4225

ANSWER

Hi! can anyone teach me English chapters on call?

Posted by Dev ?? ? 5 years ago (2378599)

CBSE > Class 12 > English Core

1 answers

Hardik Gehlot 5 years ago (7205352)

ANSWER

Which party is known as national party

Posted by Dhiraj Pandey 5 years ago (10009246)

CBSE > Class 10 > Social Science

2 answers

Bipin Bihari 5 years ago (9325975)

In any parliament election a party gets 6% votes and at least 4 seats in loksabha. That party is recognise as a national party.

Gaurav Seth 5 years ago (2898529)

Every party in the country has to register with the Election Commission. It offers some special facilities for large and established parties. The Election Commission has laid down detailed criteria of the proportion of votes and seats that a party must get in order to be a recognised party.

A party that secures at least 6% of the total votes in an election to the Legislative Assembly of a State and wins at least 2 seats is recognised as a State Party.
A party that secures at least 6% of the total votes in Lok Sabha elections or Assembly elections in 4 States and wins at least 4 seats in the Lok Sabha is recognised as a National Party.

ANSWER

A Rectangular closed box is to be covered with a decorative paper of three of the surface areas of the faces of the box are 12xy ,16xy and 25xy. Write a polynomial that expresses the total surface area of the box in terms of xy

Posted by Anushree Singh 5 years ago (10140646)

CBSE > Class 08 > Mathematics

1 answers

Diksha Laniya🐥 5 years ago (10085318)

ANSWER If the box is oped then we LSA of cabold should be applied here. area = LSA (area of 4 walls ) + one of base area = 2(1+b)h+1×b =2(28+50)20+28×50 =2×78×20+28×50 =3120cm2+1400cm2 =4520cm2

ANSWER

What is sole proprietorship?

Posted by Vitthal Anant 5 years ago (8836627)

CBSE > Class 11 > Business Studies

2 answers

Harshita Dhariwal 5 years ago (7096585)

#Business owned by a single owner #small scale #no nees to share profit with anyone #takes his own decision #unlimited liability

Gaurav Seth 5 years ago (2898529)

Sole proprietorship means a business owned, financed and controlled by a single person who is recipient of all profit and bearer of all risks.

It is SUITABLE IN AREAS OF PERSONALISED SERVICE like beauty parlour, hair cutting saloons & small scale activities like retail shops.

Features

1. Single ownership: It is wholly owned by one individual.
2. Control: Sole proprietor has full power of decision making.
3. No separate legal entity: Legally there is no difference between business& businessmen.
4. Unlimited liability: The liability of owner is unlimited. In case the assets of business are not sufficient to meet its debts, the personal property of owner can be used for paying debts
5. No legal formalities: Not required to start, manage and dissolve such business organization.
6. Sole risk bearer and profit recipient: He bears the complete risk and there is no body to share profit/loss with him.

ANSWER

12.1raise to2 -7.9raise to the power 2

Posted by Anushree Singh 5 years ago (10140646)

CBSE > Class 08 > Mathematics

1 answers

Diksha Laniya🐥 5 years ago (10085318)

To use this calculator, simply enter a number and then raise it to a power. For example, if you wanted to calculate 103 enter 10 in the numbers box and 3 in the exponent or power box. The calculator will then compute 10x10x10 and give you the answer 1000. The History Window gives you a convenient way to store your results. When you have a result that you'd like to keep simply click the + Add to history button. You can easily select, copy, and paste from that window. If you put a minus in front of the number then you will get a positive or negative result depending on whether the power is an even or an odd number. Even powers will give you a positive result whereas odd powers will give you a negative result. This is because a minus number times a minus number gives you a positive answer. If you put a minus in front of the power then you will get an inverse (i.e one divided by the number raised to that power. For example, if you put 2 in the numbers box and you put -3 in the power box you get 2-3 which is equal to 1/2x2x2 = 1/8 = 0.125.

ANSWER

Can you give any other example where we use proprotion in our daily life

Posted by Vanshika Ishika Krishita 5 years ago (9739367)

CBSE > Class 07 > Mathematics

1 answers

Gaurav Seth 5 years ago (2898529)

When we put gas in our car, there is a relationship between the number of gallons of fuel that we put in the tank and the amount of money we will have to pay. In other words, the more gas we put in, the more money we’ll pay. Also, the less money we pay, the less gas we’ll put in our car. This relationship depends on the price of a gallon of gas. The price is the proportionality ratio that exists between the quantity “gallons of gas” and the quantity “money it takes to fill up.”

Meanwhile, another car can fill up with a different amount of fuel than ours. The price per gallon stays the same, so the relationship between the gallons put in and the money paid is the same and therefore, filling each car’s tank with gas is proportional because they follow the same proportionality ratio.

Example: “If every gallon of gas costs $2 and I have $30 in my wallet, I’ll be able to put 15 gallons in the tank and if I wanted to put in 20 gallons, I’d have to pay $40”

ANSWER

Investigatory project on cancer

Posted by Kirti Sharma 1 year, 10 months ago (9525723)

CBSE > Class 12 > Biology

0 answers

ANSWER

The eighteenth century France witnessed the emergence of the middle class who were they and what Their ideas

Posted by Saurabh Pathak 5 years ago (10085984)

CBSE > Class 09 > Social Science

2 answers

Om Thakur 5 years ago (10051459)

Montesqui and 2 other philosophers are there and there ideas where to form a democratic government. .

3 Thank You

Saurabh Pathak 5 years ago (10085984)

The eighteenth century France witnessed the emergence of the middle class who were they and what Their ideas

ANSWER

What is marketing

Posted by Dhruv Sharma 5 years ago (9963688)

CBSE > Class 11 > Financial Market Management

2 answers

Lucky Sahu 5 years ago (6302578)

Marketing

Yogita Ingle 5 years ago (2577571)

Marketing, an art, which includes all activities pertaining to creation of place, time and possession utility.

ANSWER

i ( )in model town and my friend , sham also( ) there

Posted by Dk,Knowledge Point Yadav 5 years ago (10140547)

CBSE > Class 10 > English Language and Literature

3 answers

Malaika Sharma 5 years ago (9421416)

@Juweriya Azahar Sorry to say but your answer is wrong. I am in Model Town and my friend,Sham *is* also there. This is correct but in question the blank is given after also Sham also is there is wrong.

Malaika Sharma 5 years ago (9421416)

I live in Model Town and my friend,Sham also lives there.

Juweriya Azahar 5 years ago (10126802)

Am, is

ANSWER

What is the principle of homogeneity of dimensions ?

Posted by Samarth Sharma 5 years ago (8974543)

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 5 years ago (2577571)

Principle of Homogeneity of Equation/Dimensions -

An equation relating physical quantities must have the same dimensions on left hand side as on the right hand side.

For example, if we know displacement, s, depends upon initial velocity, u, acceleration,a and time, t.

and ask ourselves what must be the equation connecting all these. The principle of homogeneity tells us that

if we write, displacement s on left hand side then on the right hand side, u, a and t must be combined to get displacement dimensions or units. Hence

s = ut + at²

[L] = [LT ^-1] [T] + [LT ^-2] [T]²

[L] = [L] + [L]

So that means we can add a length to another length.

And we'll the resultant quantity with the dimensions of length.

As we can see the principle of homogeneity tells us the form of the equation, the exact equation is obtained by theoretical analysis,

and we know that the correct equation is,

s = ut + at²/2

ANSWER

Girmitiya majdur kise khete hai?

Posted by Raj Kumar 5 years ago (7785630)

CBSE > Class 10 > सामाजिक विज्ञान

1 answers

Avtar Singh Avtar Singh S 5 years ago (10056451)

Jo aupaniveshik sasan kal me majdoor girmit ke tor par fiji guyana Westindies par kaam karte Girmitiya majdoor kahalata

ANSWER

Aatmakatha Ka samas vigrah

Posted by Hota Brajmohan 5 years ago (9562908)

CBSE > Class 10 > हिंदी ब

3 answers

Kartik Desai 2 years, 9 months ago (12423119)

atma ki Katha

Saraswathy Sethuraman 5 years ago (10132112)

Asthma kind katha

Riya Rana 5 years ago (9993685)

Aatm + Katha Swayam ki katha

ANSWER

History chapter 4

Posted by Santosh Singh Bhadouriya 5 years ago (10140414)

CBSE > Class 12 > History

1 answers

Muskan Janghu 5 years ago (9980158)

Thinkers, Beliefs and Buildings

ANSWER

Give step to turn on a computer

Posted by Cold Gaming 5 years ago (10140392)

CBSE > Class 09 > Computer Applications (165)

1 answers

Pranjal Srivastava 5 years ago (6887803)

For laptop press power button for 1sec and for pc switch on the power/electricity button

ANSWER

What is the mode of transmission of cancer?

Posted by Sanjana Dua?????❣️ 5 years ago (8790599)

CBSE > Class 12 > Biology

1 answers

Neha Joshi 5 years ago (9883212)

Cancer can't be transmitted through any type of physical contact..but in malignant tumour, cells causing cancer divides and grow and reach distant sites through blood.this property is also known as metastasis

5 Thank You

ANSWER

What is widal test?

Posted by Sanjana Dua?????❣️ 5 years ago (8790599)

CBSE > Class 12 > Biology

4 answers

Rimjhim Gupta 5 years ago (9170835)

The widal test is a method used for the test of diagnosis of typhoid fever....

Sanjana Dua?????❣️ 5 years ago (8790599)

Thanks Yogita Mam and neha?️?

Neha Joshi 5 years ago (9883212)

This test used for detection of typhoid

Yogita Ingle 5 years ago (2577571)

Widal Test is an agglutination test which detects the presence of serum agglutinins (H and O) in patients serum with typhoid and paratyphoid fever. When facilities for culturing are not available, the Widal test is the reliable and can be of value in the diagnosis of typhoid fevers in endemic areas.

ANSWER

5.8×1012

Posted by Nilesh Meghwal Lunol Nilesh Meghwal 5 years ago (9970132)

CBSE > Class 08 > Mathematics

3 answers

Krishna Dubay 5 years ago (10145776)

5.8 Multiply by 1012 = 5867.6

Mayank Dhiman 5 years ago (9560199)

Simple multiply 58with 1012 than put a point after one digit in answer

Prachi Sahu 5 years ago (9718531)

5869.6

ANSWER

Multiply 4xy,xy,3/2 x2y

Posted by Manisha Lalchandani 5 years ago (7820668)

CBSE > Class 08 > Mathematics

2 answers

Diksha Laniya🐥 5 years ago (10085318)

ANSWER Product of 3x2y and −4xy2 =3x2×(−4xy2) =−12x2+1y1+2 =12x3y3

Manisha Lalchandani 5 years ago (7820668)

Pls tell me answer

ANSWER

Globe and Mapes

Posted by Uttam Das Das 5 years ago (10140224)

CBSE > Class 05 > Social Science

2 answers

Sneha Das 5 years ago (9367189)

Sneha Das

Uttam Das Das 5 years ago (10140224)

What is the globe? What are it's uses?

4 Thank You

ANSWER

Yha kavi

Posted by Insha Ansari 5 years ago (10140203)

CBSE > Class 09 > हिंदी ए

0 answers

ANSWER

What is meaning of tandri in telugu

Posted by Karan Kumar 5 years ago (9311390)

CBSE > Class 08 > Regional Language

3 answers

Mandru Kumar 4 years, 11 months ago (10310499)

It's daddy

Rippaljot Kaur Kaur 5 years ago (9896008)

Thanks

Nishant Pallav 5 years ago (10143264)

Chapal

ANSWER

What is the work done on the gas when 10cubic mere of it is compressed to 5 cubic meter under a constant pressure of 1000kPa?

Posted by Sachi Chauhan 5 years ago (9956776)

CBSE > Class 11 > Chemistry

1 answers

Sachi Chauhan 5 years ago (9956776)

No one have an answer ????..

ANSWER

5men or 6 women can complete a work in 15 days In how many days they complete the work if working together

Posted by Aniska Preet 5 years ago (9465088)

CBSE > Class 04 > Mathematics

4 answers

Simran Swag 5 years ago (10207380)

15×5=75

Shweta Sonawane 5 years ago (10160864)

Answer :- 5+6×15 5+6=15, 15×15 = 225.

Swayam Pattnaik 5 years ago (9838998)

15x 15

Annaniya Chauhan 5 years ago (10098972)

15 × 15

ANSWER

सांख्यिकी को परिभाषित कीजिए

Posted by Prashant Vishwakrma 5 years ago (9912682)

CBSE > Class 11 > अर्थशास्त्र

1 answers

Yogita Ingle 5 years ago (2577571)

सांख्यिकी का जनक गोटीफ्राइड एक्नेवाल है।“सांख्यिकी वह विज्ञान है जो किसी विषय पर प्रकाश डालने के उद्देश्य से संग्रह किये गए आँकड़ों के संग्रहण, वर्गीकरण, प्रस्तुतीकरण, तुलना तथा निर्वचन करने की रीतियों से सम्बन्धित है।”