Doubtnut

Doubtnut

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India
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Doubtnut is an Indian YouTube channel which has over 3.91 million subscribers, publishing around 60.31 thousand videos which altogether total more than 17.33 million views.

Created on ● Channel Link: https://www.youtube.com/channel/UCcv7pspGHmM7AOywuLM1ufA



Top 400 Counter-Strike: Source Videos With The Most Comments by Doubtnut


Video TitleCommentsCategoryGame
301.Calculate the vapour pressure of solution having 3.42g cane sugar in 180 g water at 40^(@)C and ...0Counter-Strike: Source
302.State with reason, whether the following are true of false. A, B and C are matrices of order 2 x...0Counter-Strike: Source
303.By selling a bicycle for Rs. 5670 a trader gains Rs. 270. Find his gain per cent. [Hint: C.P. = ...0Counter-Strike: Source
304.When composite rod is free, composite length increase to 2.002m from temperature 20^(@)C to 120^...0Counter-Strike: Source
305.A sample of gas occupies volume of 2.74 dm^(3) at 0.9 bar and 27^(@)C. What will be the volume a...0Counter-Strike: Source
306.In Figure,\nIf /_A B C=45^0,\nthen /_A O C=\n\n(a) 45^0\n(b) 60^0\n(c) 75^0\n(d) 90^0 | 9 | CIRC...0Counter-Strike: Source
307.Give IUPAC name for each of the following {:(CHO),( |),((CH_(3))_(2)-C-CH_(2)OH):} | 12 | NOMENC...0Counter-Strike: Source
308.एक C.S.L. सूर्य के द्रव्यमान का कितना गुना है? | 11 | मात्रक एवं मापन | PHYSICS | SANJEEV PUBLI...0Counter-Strike: Source
309.In Figure, A B C D\nis a parallelogram. O\nis any\npoint on A C.P Q\\ || A B\\ a n d\\ L M ||A D...0VlogCounter-Strike: Source
310.There are 3 urns A, B and C. Urn A contains 4 red balls and 3 black balls. Urn B contains 5 red ...0Counter-Strike: Source
311.The heat capacity of a bomb calorimeter is 500J//^@C. When 0.1 g of a methane was burnt in this ...0Counter-Strike: Source
312.Maximum water potential is present in (a) Hypotonic solution \n\n(b) Hypertonic solution \n\n(c)...0Counter-Strike: Source
313.Let R be a relation over the set NxxN and it is defined by (a,b)R(c,d)impliesa+d=b+c. Then R is ...0Counter-Strike: Source
314.निम्न कॉलमों का मिलान कीजिए।कोडa. A-5 B-6 C-4 D-3 E-1 F-2\n\n b. A-6 B-4 C-3 D-1 E-2 F-5\n\n c. ...0Counter-Strike: Source
315.2HgCl_2 + SnCl_2- Hg_2Cl_2+ SnCl_4 में असत्य कथन है | 12 | रसायनिक अभिकिर्याएँ एवं उत्प्रेरण | C...0Counter-Strike: Source
316.A thermocouple has its junctions at 0^@ C and 100^@ C. It produces 0.022mV/K. Find the balancing...0Counter-Strike: Source
317.Aniline can be obtained by : (a)C_(6)H_(5)COOHunderset(H^(o+))overset(N_(3)H)(to) (b)C_(6)H_(5)C...0Counter-Strike: Source
318.डाइसैकेराइड क्या हैं ? इनके प्रकार तथा किसी एक के रासायनिक परीक्षण भी लिखिए | | 12 | जैव अणु | C...0Counter-Strike: Source
319.निम्नलिखित प्रक्रमों में से किसमें आयरन का ऑक्सीकरण नहींहोता है | 12 | रेडॉक्स अभिक्रियाएँ | C...0Counter-Strike: Source
320.The following results are obtained in several dihybrid test crosses in an organism considering t...0Counter-Strike: Source
321.निम्नलिखित यौगिकों में नाभिकस्नेही योगात्मक अभिक्रिया के लिए आपेक्षिक अभिक्रिया दर का क्रम होगाC...0Counter-Strike: Source
322.Give the structural formula of an unsaturated hydrocarbon with the lowest number of C atoms (or ...0Counter-Strike: Source
323.{:(LIST - 1,LIST-2),(A) Colloidal,1) Liquid or solid or gas),(B) Crystalloid,2) 1m mu-1mu),(C) T...0Counter-Strike: Source
324.In rectangle along x-axis and AB=8 units. Find the co-ordinates of vertices A,B and C. | 9 | CO-...0Counter-Strike: Source
325.Delta H = Delta E + Delta nRT में Delta n का मान कभीशून्य नहीं होता है। | 11 | उष्मागतिकी | C...0Counter-Strike: Source
326.X Y\nis a line parallel to side B C\nof /_\\ A B C. B E || AC\nand C F || A B\nmeet X Y\nin E\na...0Counter-Strike: Source
327.If A=[{:(,1,3),(,3,4):}], B=[{:(,-2,1),(,-3,2):}] and A^2-5B^2=5C. find matrix C where C is a 2 ...0Counter-Strike: Source
328.क्या दी-ब्रोगली समीकरण के आधार पर पृथ्वी को एक तरंग माना जाना चाहिए ? | 11 | परमाणु संरचना | C...0Counter-Strike: Source
329.केश शैम्पू संश्लेषित अपमार्जकों के किस वर्ग से संबंधित होते है? | 12 | दैनिक जीवन में रसायन | C...0Counter-Strike: Source
330.परिशोधित स्प्रिट से परिशुद्ध एल्कोहल प्राप्त करने की विधि है | 12 | एल्कोहल , फिनॉल एवं ईथर | C...0Counter-Strike: Source
331.अयस्क के सान्द्रण से आप क्या समझते हैं। | 12 | तत्वों के निष्कर्षण के सिद्धान्त एवं प्रक्रम | C...0Counter-Strike: Source
332.Consider two charges +q and -q placed at B and C of an equilateral triangle ABC. For this system...0Counter-Strike: Source
333.ऐल्कोहॉल से आप निम्न को किस प्रकार बनायएगे ? ,(ii) फ्लुओरोएथेन , | 12 | हैलोजेन व्युत्पन्न | C...0Counter-Strike: Source
334.सही या गलत -दो संख्याओं का गुणनफल =H.C.F xx L.C.M. | 10 | गणित 2017 (A) | MATHS | BIHAR BOARD- P...0Counter-Strike: Source
335.बिंदु P(1,2,3) से तल 2x-y+z+3=0 पर डाले गए लम्ब का पाद है | 12 | त्रिविमीय ज्यामिति | MATHS | C...0Counter-Strike: Source
336.What is the order of basic nature of hydrides of VA group elements? | 12 | VA GROUP ELEMENTS | C...0Counter-Strike: Source
337.The K.E. of N molecule of O_(2) is x Joules at -123^(@)C. Another sample of O_(2) at 27^(@)C has...0Counter-Strike: Source
338.सामान्य सूत्र जो ऐल्केनॉल के सजातीय समूह को प्रदर्शित करता है, वह है - | 12 | मॉडल पेपर 2022 | C...0Counter-Strike: Source
339.By imparting heat to a body, its temperature rises by 15^@C. What is the corresponding rise in t...0Counter-Strike: Source
340.Find the H.C.F. of the given numbers by prime factorisation method: (i) 28, 46 (ii) 25, 65 (...0Counter-Strike: Source
341.Fossils that represent a hominid who walked erect and had a cranial capacity around 900 c.c | 12...0Counter-Strike: Source
342.Match Column - I with Column - II. {:(,Column - I,,Column - II),((A),NaCl(C.N. of Na^(+)),(p),4)...0Counter-Strike: Source
343.Given A=[{:(,2,-1),(,2,0):}], B=[{:(,-3,2),(,4,0):}] and C=[{:(,1,0),(,0,2):}], Find the matrix ...0Counter-Strike: Source
344.Ina triangle ABC , AB = AC and angle A = 36^(@) If the internalbisectorof angle C meets AB at D...0Counter-Strike: Source
345.x के मान के लिए हल करें :2(x^2+1/x^2)-3(x-1/x)-6=0, x ne 0 | 10 | द्विघात समीकरण | MATHS | S C...0Counter-Strike: Source
346.In Fig.\r\n4.125, F E C~= G B D\nand /_1=/_2\n. Prove\r\nthat A D E A B C\n. (FIGURE) | 10 | T...0Counter-Strike: Source
347.Find the amount and the C.I. on Rs. 8,000 in 11/2 years at 20% per year compounded half-yearly. ...0Counter-Strike: Source
348.LetA (4, 2), B(6, 5) and C(1, 4) be the vertices of Delta A B C. (i) The median from A meets BC...0Counter-Strike: Source
349.A, B, C एवं D के लिए उपयुक्त विकल्प का चयन किजिए। TT. X tt1. A-tt, B-TT,C-Tt,D-TT 2. A-TI, B-Tt....0Counter-Strike: Source
350.निम्नलिखित के I.U.P.A.C. नाम बताइए। a. underset(CH_(2)-COOH)underset(|)(CH_(2))-COOH b. CH_(3)-u...0Counter-Strike: Source
351.Infigure, ABC is triangle in which angleABCgt90^@ andA D_|_C Bproduced.Prove that A C^2=A B^2+B ...0Counter-Strike: Source
352.A (1, 4), B (3, 2) and C (7,5) are vertices of a triangle ABC. Find : the equation of a line, th...0Counter-Strike: Source
353.Write the formula for : Potash alum : ............... | 10 | STUDY OF ACIDS, BASES AND SALTS | C...0Counter-Strike: Source
354.The density of a gas is found to be 1.56 g L^(-1) at 745 mm pressure and 60^(@)C. Calculate the ...0Counter-Strike: Source
355.I) The maximum value of c + 2bx -x^(2) is c+b^(2) II) The minimum value of x^(2) + 2bx + c is c-...0Counter-Strike: Source
356.Evaluate: a. 24-:3-:2 b. 72-:2-:4-:3 c. 15xx4-:5-:3-:2 d. 21xx2xx3-:7-:6 108-:3-:2-:6-:3 | 6 | W...0Counter-Strike: Source
357.The electric field in a certain region of space is(5 hat(i) + 4 hat(j) - hat(k)) xx 10^(5) N//C....0Counter-Strike: Source
358.Compound (A) has molecular formula C_(5)H_(12)O. It liberates H_(2) gas on reaction with Na-Metl...0Counter-Strike: Source
359.विरंजक चूर्णपर तनु सल्फ्यूरिकअम्ल की अभिक्रियासे गैस निकलतीहै : | 10 | अम्ल, क्षार एवं लवण | C...0Counter-Strike: Source
360.Name the disease caused due to deficiency of vitamin A and C. | 9 | NUTRITION | BIOLOGY | ICSE ...0VlogCounter-Strike: Source
361.In the given figure, an ideal gas changes its state from state state C by two paths ABC and AC. ...0Counter-Strike: Source
362.Show that the current leads the voltage in phase by pi//2 in an a.c. circuit containing an ideal...0ShowCounter-Strike: Source
363.Evaluate the following : {:(a.,|20 - 9|,b.,|16-7|),(c.,|3-(9-1)|,d.,|15-(20 - 11)|),(e.,|21 - (3...0Counter-Strike: Source
364.1 मी व्यास के लोहे के रिंग को 1.005 मी व्यास की पुली पर चढ़ाया जाता है। यदि रिंग का तापमान 20^@C...0Counter-Strike: Source
365.D and E arepoints on sides AB and AC respectively ofDelta A B C such that a r\\ (D B C)\\ =\\ a ...0Counter-Strike: Source
366.चालकता, तुल्यांकी चालकता एवं मोलर चालकता पर तनुता के प्रभाव को समझाइये। | 12 | वैधुत रसायन | C...0Counter-Strike: Source
367.Find the selling price if:C.P= Rs 350 overheads = Rs 28 and profit =20% | 8 | PROFIT, LOSS AND D...0Counter-Strike: Source
368.A body having mass 2 Kg cools in a surrounding ofconstant temperature 30^(@)C. Its heat capacity...0Counter-Strike: Source
369.किसी धातु (परमाणु भार= 60) की क्रिस्टल संरचना f.c.c.एवं यूनिट सेल की कोर लम्बाई400pm हो, तो उसके...0Counter-Strike: Source
370.In any triangle A B C ,\\ sin A-cos B=cos C ,\\ \r\nthe angle\\ B\r\nis\r\na.pi/2\r\nb. pi/3\r\...0Counter-Strike: Source
371.A mixtureof hydazine(N_(2)H_(4))and 58-60% solutionof H_(2)O_(2) is used as | 12 | HYDROGEN | C...0Counter-Strike: Source
372.अन्त:रोपण के पश्चात् अन्तर कोशिका समूह बाह्य ...A...मध्य ....B...तथा एक अन्तः.....c....में विभेद...0Counter-Strike: Source
373.The length of a metallic sheet is measured as 10.0 cm using a metre scale of L.C. 0.1cm and its ...0Counter-Strike: Source
374.A glass cylinder contains m_0=100g of mercury at a temperature of t_0=0^@C. When temperature bec...0Counter-Strike: Source
375.The total number of halogenated products likely to be formed by ethance is: | 11 | ISOMERISM | C...0VlogCounter-Strike: Source
376.The difference between the C.I and the S.I on Rs 8,400 for two years is Rs 21 at the same rate o...0Counter-Strike: Source
377.Find: c. 3 (4)/(5) xx (35)/( 38) | 7 | FRACTIONS | MATHS | ICSE | Doubtnut0Counter-Strike: Source
378.the H.C.F. of two numbers is 145, their L.C.M. is\r\n2175. If one number is 725, find the other....0Counter-Strike: Source
379.If a,b,c are the sides of triangle ABC satisfying log (1 +c/a)+log a - log b = log 2. Also a(1 -...0VlogCounter-Strike: Source
380.A given mass of water is cooled from 10^(@)C to 0^(@)C. State the volume changes observed. Repre...0Counter-Strike: Source
381.A (4,2), B(6,8) and C (8,4) are the vertices of a triangle ABC. Write down the equation of the m...0Counter-Strike: Source
382.In a series L.C.R. circuit, the potential drop across L, C and R respectively are 40V, 120V and ...0Counter-Strike: Source
383.If a,b,c are distinct real number different from 1 such that (log_(b)a. log_(c)a-log_(a)a) + (lo...0VlogCounter-Strike: Source
384.निम्नलिखित को समझाइए -(i ) भर्जन(ii ) निस्तापन (iii ) प्रगलन(iv ) गालक | 10 | धातु और अधातु | C...0Counter-Strike: Source
385.The time variations of signals are given as in A,B and C. Point out the true statement from the ...0Counter-Strike: Source
386.Given the following\nvalues, find the unknown values:\n (i) C.P. =Rs 720, S.P. =? Profit=Rs 55.5...0Counter-Strike: Source
387.A B C\nis a triangle in which D\nis the mid-point of B C\nand E\nis the mid-point of A D.\nProve...0Counter-Strike: Source
388.Construct a triangle ABC in which BC = 8 cm, angle B = 45° and angle C = 30° Construct another t...0Counter-Strike: Source
389.A glass flask with volume 200 cm^(3) is filled to the brim with mercury at 20^(@)C. How much mer...0Counter-Strike: Source
390.D, E and F arerespectively the mid-points of the sides BC, CA and AB of aDeltaA B C. Show that (...0ShowCounter-Strike: Source
391.उभयनिष्ठ उत्सर्जक विधा में किसी क्षण आधार धारा I_(B) उत्सर्जक धारा I_(E) तथा संग्राही धारा I_(C)...0Counter-Strike: Source
392.An organic compound A contains C= 68.85%, H=4.9% and reacts with NH_(2)OH. On treatment with NaO...0Counter-Strike: Source
393.Given the following\nvalues, find the unknown values:\n (i) C.P. = Rs 1200, S.P. = Rs 1350 Profi...0Counter-Strike: Source
394.Total number of d electrons present in an element with atomic number 78 is :- | 12 | INORGANIC C...0Counter-Strike: Source
395.खाद्य श्रृंखला में होते हैं A. पादपB. शाकाहारीC. माँसाहारीD.ये सभी | 12 | पारितन्त्र | BIOLOGY |...0VlogCounter-Strike: Source
396.यदि a, b तथा c इकाई सदिश है तथा bara+barb+barc=bar0 तब bara.barb+barb.barc+barc.bara का मान ज्ञा...0Counter-Strike: Source
397.Statement-1: Potential energy of water at 0^(@)C is more than ice at 0^(@)C. Statement-2: Heat g...0Counter-Strike: Source
398.Let DeltaA B C ~ DeltaD E F and then areas be, respectively, 64c m^2and121c m^2. If EF = 15.4 cm...0Counter-Strike: Source
399.Human skin colour is controlled by 3 genes A, B and C. Which of the following genotypes will hav...0Counter-Strike: Source
400.int1/(1+sqrt(x))dx\nis equal to\na. 2sqrt(x)+2ln|1+sqrt(x)|+c\n\nb. 2sqrt(x)-2ln|1+sqrt(x)|+c\n\...0Counter-Strike: Source