Doubtnut

Doubtnut

Views:
17,330,221
Subscribers:
3,910,000
Videos:
60,308
Duration:
174:13:37:23
India
India

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 Longest Duration by Doubtnut


Video TitleDurationCategoryGame
301.परासरण दाब (prod), आयतन (V) व ताप (T) के लिए निम्न में से कौन-सा कथन असत्य है ? | 12 | विलयन | C...2:36Counter-Strike: Source
302.Pd इसके आयतन से 900 गुना हाइड्रोजन अधिशोषित कर सकता है। यह कहलाता है : | 12 | पृष्ठीय रसायन | C...2:34Counter-Strike: Source
303.A metallic tape gives correct value at 25^(@)C.A piece of wood is being measured by this metalli...2:31Counter-Strike: Source
304.Consider the figure shown here of a moving cart C. if the coefficient of friction between the b...2:30ShowCounter-Strike: Source
305.उदासीनीकरण क्रिया से क्या अभिप्राय है? इसे प्रयोग द्वारा समझाएँ । | 7 | अम्ल , क्षारक और लवण | C...2:30Counter-Strike: Source
306.Convert the following fractions into percentages. a. (2)/(25)b. (3)/(75)c. (3)/(20)d. (5)/(8)e.(...2:30Counter-Strike: Source
307.Calculate the number of atoms in each of the following a. 52 mol of He b. 52 u of He c. 52 g of ...2:30Counter-Strike: Source
308.A sample of gas occupies volume of 2.74 dm^(3) at 0.9 bar and 27^(@)C. What will be the volume a...2:29Counter-Strike: Source
309.In the diagram given below angleEDC. The tangent drawn to the circle at C makes an angle of 50^(...2:29Counter-Strike: Source
310.खाद्य श्रृंखला में होते हैं A. पादपB. शाकाहारीC. माँसाहारीD.ये सभी | 12 | पारितन्त्र | BIOLOGY |...2:29VlogCounter-Strike: Source
311.फ्रेंकल दोष उन क्रिस्टलों में पाये जाते हैं जिनका त्रिज्या अनुपात होता है | 12 | ठोस अवस्था | C...2:28Counter-Strike: Source
312.Write a balanced equation for theC _(2) H _(4) + Br _(2) to | 10 | SAMPLE QUESTION PAPER 02 | C...2:28Counter-Strike: Source
313.A B C D\nis a cyclic\nquadrilateral in which:\nB C is para l l e l t o A D ,\\ /_A D C=110^0\\ a...2:28Counter-Strike: Source
314.निम्न में से कौन-सी औषधि पूर्तिरोधी के रूप में प्रयोग होती है? | 12 | मॉडल सॉल्वड पेपर 2016 | C...2:28Counter-Strike: Source
315.किस जन्तु में R.B.C. केन्द्रकयुक्त होता है | 11 | प्राणियों का संरचनात्मक संगठन | BIOLOGY | N...2:27VlogCounter-Strike: Source
316.Calcualte the C.I. on Rs 3,500 at 6% per annum for 3 years, the interest being compounded half-y...2:27Counter-Strike: Source
317.क्यूप्रस आयन रंगहीन है, जबकि क्यूप्रिक आयन रंगीन है क्योंकि | 12 | D एवं F - ब्लॉक के तत्व | C...2:27Counter-Strike: Source
318.If A, B, C and D are four points such that angleBAC=30^(@)and angleBDC=60^(@),then D is the cent...2:27Counter-Strike: Source
319.How many meiotic divisions are required to produce 200 pollen grains ? (a) 40 \n\n(b) 50 \n\n(c)...2:27Counter-Strike: Source
320.बहु-आबंधोके कारण आबन्धलम्बाई या दूरी ________ है । | 11 | रासायनिक आबन्धन एवं आणविक संरचना | C...2:27Counter-Strike: Source
321.LiAlH_4 का एक उपयोग लिखिए। समीकरण भी कीजिए। | 12 | ऐल्डीहाइड ,कीटोन तथा कार्बोक्सिलिक अम्ल - | C...2:27Counter-Strike: Source
322.A (1, 4), B (3, 2) and C (7,5) are vertices of a triangle ABC. Find : the co-ordinates of the ce...2:27Counter-Strike: Source
323.क्या होता है जब एथिल आयोडाइड निम्न से क्रिया करता है- AgCN | 12 | हैलोऐल्केन्स तथा हैलोऐरींस | C...2:25Counter-Strike: Source
324.Fill the blanks with lt, gt sign : {:(a.,-4 ______-9,b.,-12_______-3,c.,-5________3),(d.,8______...2:25Counter-Strike: Source
325.निम्नलिखितमें से कौन - सा एक समइलेक्ट्रॉनिक स्पीशीजो के समूह को दर्शाता है ?( परमाणु क्रमांक : C...2:24Counter-Strike: Source
326.If in two\r\ntriangles A B C\nand D E F\n, (A B)/(D E)=(B C)/(F E)=(C A)/(F D)\n, then\n F D E C...2:23Counter-Strike: Source
327.Give IUPAC name for each of the following {:(CHO),( |),((CH_(3))_(2)-C-CH_(2)OH):} | 12 | NOMENC...2:22Counter-Strike: Source
328.निम्नलिखित में से किसे मानव निर्मित रेशे भी कहा जाता है? | 8 | Synthetic fibres and Plastics | C...2:22Counter-Strike: Source
329.हड्डियों को जोड़ने के लिए डॉक्टर किस लवण का प्रयोग करता है? | 10 | मॉडल पेपर 2021 (सेट - 1) | C...2:22Counter-Strike: Source
330.Let DeltaA B C ~ DeltaD E F and then areas be, respectively, 64c m^2and121c m^2. If EF = 15.4 cm...2:22Counter-Strike: Source
331.संख्या, 17,23 और 29का अभाज्य गुणनखंडन विधि द्वारा H.C.F. और L.C.M. ज्ञात करें| | 10 | वास्तविक ...2:22Counter-Strike: Source
332.NO_(2)^(-) की आकृति व N की संकरण अवस्था क्या होगी? | 11 | रासायनिक आबन्धन तथा आण्विक संरचना | C...2:22Counter-Strike: Source
333.Water has maximum density at 4°C. | 8 | WATER | CHEMISTRY | ICSE | Doubtnut2:20Counter-Strike: Source
334.If two numbers are in the\r\nratio 6: 13\nand their L.C.M is 312,\r\nfind the numbers. | 7 | RAT...2:20Counter-Strike: Source
335.निम्न में से कौनसा कथन गैस के स्वतः प्रवर्तित अधिशोषण के लिये सही है? | 12 | पृष्ठीय रसायन | C...2:20Counter-Strike: Source
336.कॉपर जिंक को उसके लवण के विलयन से विस्थापित नहीं कर सकता क्यों ? | 8 | पदार्थ धातु और अधातु | C...2:20Counter-Strike: Source
337.एक विद्युत युक्ति 12 A धारा एवं 120 V D.C. पर कार्य करती है। यदि इसे 250 V तथा 30 Hz AC से जोड़ा...2:19Counter-Strike: Source
338.In how many years will Rs 2,000 amount to Rs. 2,662 at 10 percent p.a C.I ? | 9 | COMPOUND INTER...2:19Counter-Strike: Source
339.If (x^(2)+x+2)/(x^(2)+2x+1)=A+(B)/(x+1)+(C)/((x+1)^(2)), then find the value of A+B+C. | 12 | PA...2:17Counter-Strike: Source
340.The product of H.C.F. and L.C.M. of two numbers is 192. If one of number is 16, find the other n...2:17Counter-Strike: Source
341.Oxygen boils at -183^(@)C. This temperature is approximately | 12 | NTA NEET SET 36 | PHYSICS | ...2:17Counter-Strike: Source
342.जब अमोनियम क्लोराइड को अमोनियम हाइड्रॉक्साइड के विलयन में मिलाते हैं, तो | 11 | साम्यावस्था | C...2:17Counter-Strike: Source
343.Given the following\nvalues, find the unknown values:\n (i) C.P. =Rs 720, S.P. =? Profit=Rs 55.5...2:16Counter-Strike: Source
344.The time variations of signals are given as in A,B and C. Point out the true statement from the ...2:16Counter-Strike: Source
345.A substance is in the solid from at 0^(@)C. The amount of heat added to this substance and its t...2:15Counter-Strike: Source
346.The freezing poing of an aqueous solution of a non-electrolyte is -0.14^(@)C. The molality of th...2:15Counter-Strike: Source
347.Given the following\nvalues, find the unknown values:\n (i) C.P. = Rs 1200, S.P. = Rs 1350 Profi...2:14Counter-Strike: Source
348.Huygen was the figure scientist who proposed the idea of wave theory of light he said that the ...2:13Counter-Strike: Source
349.चुंबकीय क्षेत्र का C.G .S मात्रक क्या होता है ? | 12 | गतिमान आवेश और चुम्बकत्व | PHYSICS | LECT...2:13Counter-Strike: Source
350.In the given figure, an ideal gas changes its state from state state C by two paths ABC and AC. ...2:13Counter-Strike: Source
351.(8x^(3) - 1/(27y^(3))) के गुणनखण्ड हैं| | 12 | बहुपद के गुणनखण्ड | MATHS | ARIHANT PUBLICATION C...2:13Counter-Strike: Source
352.In a quadrilateral ABCD, AB = CD and angle B = angle C . Prove thatAD is parallel to BC. | 9 |...2:11Counter-Strike: Source
353.किस विधि द्वारा अवक्षेप को कॉलोइडी विलयन में परिवर्तित किया जाता है : | 12 | पृष्ठीय रसायन | C...2:10Counter-Strike: Source
354.I) The maximum value of c + 2bx -x^(2) is c+b^(2) II) The minimum value of x^(2) + 2bx + c is c-...2:10Counter-Strike: Source
355.यदि log_(a)9=2,log_(b)8=3 हों, तो log_(a)bहै - | 12 | प्रैक्टिस सेट - 6 | MATHS | AGRAWAL EXAM C...2:10VlogCounter-Strike: Source
356.Show that the current leads the voltage in phase by pi//2 in an a.c. circuit containing an ideal...2:10ShowCounter-Strike: Source
357.Find the percentage of calcium in calcium carbonate (CaCO_(3)). | 12 | SOME BASIC CONCEPTS OF C...2:09Counter-Strike: Source
358.किसी संक्रमण तत्व द्वारा प्रदर्शित उच्च ऑक्सीकरण अवस्था है। | 12 | D एवं F - ब्लॉक के तत्व | C...2:09Counter-Strike: Source
359.बहते रक्त पर FeCl_(2) अथवा फिटकरी लगाने से उसका बहाव रुक जाता है, क्यों? | 12 | पृष्ठ रसायन | C...2:09Counter-Strike: Source
360.HCI की KMnO_(4)से क्रिया का समीकरण लिखिए- | 12 | p - ब्लॉक के तत्व ( समूह 17 व 18 के तत्व ) | C...2:09Counter-Strike: Source
361.Find the selling price if:C.P= Rs 350 overheads = Rs 28 and profit =20% | 8 | PROFIT, LOSS AND D...2:09Counter-Strike: Source
362.Which of the following is completely absorbed in P.C.T. ? | 12 | HUMAN PHYSIOLOGY -I | BIOLOGY |...2:08VlogCounter-Strike: Source
363.Distinguish: Slag and flux | 12 | GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS | C...2:08Counter-Strike: Source
364.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....2:07Counter-Strike: Source
365.क्षारीय पोटेशियम परमैगनेट द्वारा लैक्टिक अम्ल का ऑक्सीकरण देता है | 12 | कार्बोक्सिलिक अम्ल | C...2:07Counter-Strike: Source
366.State with reason, whether the following are true of false. A, B and C are matrices of order 2 x...2:07Counter-Strike: Source
367.What is Ellingham diagram? | 12 | GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS | C...2:06Counter-Strike: Source
368.स्पेक्ट्रोरसायन श्रेणी में लिगेण्डो के शक्ति क्षेत्र का सही क्रम है | 12 | उपसहसंयोजक रसायन | C...2:05Counter-Strike: Source
369.घोडे के मूत्र में कौन-सा अम्ल पाया जाता है? | 12 | ऐल्डीहाइड ,कीटोन तथा कार्बोक्सिलिक अम्ल - | C...2:05Counter-Strike: Source
370.To find sum of three numbers 14, 27 and 13, we can have two ways: (a) We may first add 14 and 27...2:05Counter-Strike: Source
371.सही या गलत -दो संख्याओं का गुणनफल =H.C.F xx L.C.M. | 10 | गणित 2017 (A) | MATHS | BIHAR BOARD- P...2:05Counter-Strike: Source
372.The following results are obtained in several dihybrid test crosses in an organism considering t...2:03Counter-Strike: Source
373.Consider two charges +q and -q placed at B and C of an equilateral triangle ABC. For this system...2:02Counter-Strike: Source
374............ electrodes are used during electrolysis of acidulated water. | 10 | ELECTROLYSIS | C...2:01Counter-Strike: Source
375.सोडियम निष्कर्षण की कास्टनर विधि में ऐनोड किस धातु का बना होता है | 12 | S -ब्लॉक के तत्व | C...2:01Counter-Strike: Source
376.Maximum water potential is present in (a) Hypotonic solution \n\n(b) Hypertonic solution \n\n(c)...2:01Counter-Strike: Source
377.Find the H.C.F. of the following numbers using\nprime factorization method:\n144, 198 | 6 | PLA...2:00Counter-Strike: Source
378.In which pair the first atom or ion is not larger than the second :- | 12 | Periodic Table | C...2:00Counter-Strike: Source
379.An ideal gas heat engine operates in a Carnot cycle between 227^(@)C and 127^(@)C. It absorbs 6K...2:00Counter-Strike: Source
380.the H.C.F. of two numbers is 145, their L.C.M. is\r\n2175. If one number is 725, find the other....2:00Counter-Strike: Source
381.The H.C.F. and L.C.M. of two numbers are 13 and\r\n1989 respectively. If one of the numbers is 1...1:59Counter-Strike: Source
382.CH_(3)-Br+NaO-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-CH_(3)to ? ltBrgt The produc...1:57Counter-Strike: Source
383.The number of ordered pair (x ,\\ y)\nsatisfying correspondence C_1\nis\n1\nb. 2\nc. 3\nd. 4 | 1...1:57Counter-Strike: Source
384.Length of minor a r c(A C)i s-\n\na.10pi\nb. \\ 5pi\nc.\\ 40\\ pi/3\nd. 20\\ pi/3 | 11 | TRIGONO...1:57Counter-Strike: Source
385.If alpha+beta=c\\ w h e r e\\ alpha,betagt0\neach lying between 0\\ a n d\\ pi//2\nand c\nis a c...1:57Let's PlayCounter-Strike: Source
386.Sulphur dioxide turns acidified potassium dichromate ............... . | 10 | SULPHURIC ACID | C...1:57Let's PlayCounter-Strike: Source
387.By imparting heat to a body, its temperature rises by 15^@C. What is the corresponding rise in t...1:57Counter-Strike: Source
388.In Figure, P Q || A B\\ a n d\\ P R\\ || B C\n. If /_Q P R=102^0\n, determine /_A B C.\nGive rea...1:56Counter-Strike: Source
389.अनिवार्य तथा अन-अनिवार्य एमीनो अम्ल क्या हैं ? प्रत्येक के दो उदाहरण दीजिए । | 12 | जैव अणु | C...1:56Counter-Strike: Source
390.एक पदार्थ का कार्यफलन 3.3ev है तो इसकी देहली आवृत्ति होगी | 12 | सॉल्वड पेपर 2015 | PHYSICS | C...1:56Counter-Strike: Source
391.State the S.I. and C.G.S. units of density. How are they related ? | 7 | PHYSICAL QUANTITIES AND...1:56Counter-Strike: Source
392.Find the H.C.F. of the following numbers using\nprime factorization method:\n150, 140, 210 \n | ...1:55Counter-Strike: Source
393.निम्न में से कौनसा खनिज में पाया जाता है | 12 | तत्वों के निष्कर्षण के सिद्धांत एवं प्रक्रम | C...1:54Counter-Strike: Source
394.A sample of gas is at 0^(@)C. To what temperature it must be raised in order to double the rms s...1:54Counter-Strike: Source
395.Find the H.C.F. of the following numbers using\nprime factorization method:\n225, 450 | 6 | PLA...1:53Counter-Strike: Source
396.Write balanced equation for the reaction of zinc and dilute hydrochloric acid. | 10 | STUDY OF C...1:52Counter-Strike: Source
397.What is the order of basic nature of hydrides of VA group elements? | 12 | VA GROUP ELEMENTS | C...1:52Counter-Strike: Source
398.Write the formula for : Potash alum : ............... | 10 | STUDY OF ACIDS, BASES AND SALTS | C...1:51Counter-Strike: Source
399.The electric field in a certain region of space is(5 hat(i) + 4 hat(j) - hat(k)) xx 10^(5) N//C....1:50Counter-Strike: Source
400.क्या चोक कुंडली द्वारा दिष्ट धारा (d.c.) को नियंत्रित किया जा सकता है ? कारण दीजिए । | 12 | प्र...1:49Counter-Strike: Source