Doubtnut

Doubtnut

Views:
17,331,528
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 200 Counter-Strike: Source Videos With The Longest Duration by Doubtnut


Video TitleDurationCategoryGame
101.A sum of money is invested at C.I. payable annually. The amounts of interest in two successive y...4:32Counter-Strike: Source
102.लोहे के निष्कर्षण प्रयुक्त गालक है- | 12 | तत्वों के वियोजन के सामान्य सिद्धांत और प्रक्रम | C...4:29Counter-Strike: Source
103.(a) प्रत्यावर्तीधारास्रोत (a.c. source) में वोल्टेजका शिखरमान 300 V है । rms वोल्टताज्ञात करें।(...4:29Counter-Strike: Source
104.In each of the following figure. O is the centre of the circle. Find the values of a,b and c. | ...4:29Counter-Strike: Source
105.A capacitor C (=100 muF) is charged with a total charge of 1.2 xx 10^(-3)C and connected in a c...4:28Counter-Strike: Source
106.If in a triangle ABC, 2 (cos A)/(a)+(cos B)/(b)+2(cos C)/(c)=(a)/(bc)+b/(ca) then the value of t...4:26Counter-Strike: Source
107.दो धातुओं के नाम बताएँ जो अम्ल और क्षार से अभिक्रिया कर H_2 गैस देती हैं। | 10 | प्रायोगिकी | C...4:24Counter-Strike: Source
108.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...4:22Counter-Strike: Source
109.On a graph paper, plot the triangle ABC, whose vertices areat the points A (3,1) , B (5,0) and C...4:22Counter-Strike: Source
110.Give the structural formula of an unsaturated hydrocarbon with the lowest number of C atoms (or ...4:21Counter-Strike: Source
111.निम्न में से कौन सा यौगिक अपचयन पर प्राथमिक एल्कोहल नहीं देता है | 12 | एल्डिहाइड एवं कीटोन | C...4:19Counter-Strike: Source
112.Define the terms: a. Element b. Atom, c. Molecule. | 8 | MATTER | PHYSICS | ICSE | Doubtnut4:19Counter-Strike: Source
113.At what temperarture, the kinetic energy of a gas molecule is half of the value at 27^(@)C. ? |...4:18Counter-Strike: Source
114.निम्न में से कौनसी संरचना उचित अनुनाद के रुप में नहीं होती है | 12 | सामान्य कार्बनिक रसायन | C...4:16Counter-Strike: Source
115.A (4,2), B(6,8) and C (8,4) are the vertices of a triangle ABC. Write down the equation of the m...4:15Counter-Strike: Source
116.Ina triangle ABC , AB = AC and angle A = 36^(@) If the internalbisectorof angle C meets AB at D...4:14Counter-Strike: Source
117.फीनॉल की क्लोरोफॉर्म तथा KOH से क्रिया का रासायनिक समीकरण लिखिए। | 12 | QUESTION PAPER 2018 | C...4:13Counter-Strike: Source
118.A 5.0 litres cylinder contained 10 moles of hydrogen gas at 27°C. Due to leakage, entire gas es...4:13Counter-Strike: Source
119.D (+) Glucose has melting point 146^@C and specific rotation [alpha]_(D)^(25) is + 112^@C. Anoth...4:12Let's PlayCounter-Strike: Source
120.Statement-1 : 0.5 M aq. NaOH solution is identical to 2% (w/v) aq. NaOH solution Statement-2 : C...4:12Counter-Strike: Source
121.D and E are points on the sides CA and CB respectively of a triangleABC right angled at C. Prove...4:11Counter-Strike: Source
122.A (1, 4), B (3, 2) and C (7,5) are vertices of a triangle ABC. Find : the equation of a line, th...4:11Counter-Strike: Source
123.Which out of the following are expressions with numbers only? (a) y + 3 (b) (7 xx 20) - 8 z (c)...4:11Counter-Strike: Source
124.In the given figure, angle C = 90^(@) and D is mid-point of AC. Find : (i) (tan angle CAB)/(tan ...4:10Counter-Strike: Source
125.Consider the function f(x)=(sec^(-1)x)^2+(cos e c^(-1)x)^2\nthen\nRange of f(x)\nis [(pi^2)/8,(5...4:10Counter-Strike: Source
126.कोलॉइड एक पदार्थ नहीं पदार्थ की एक अवस्था हैं इस कथन, पर टिप्पणी कीजिये। | 12 | पृष्ट रसायन | C...4:10Counter-Strike: Source
127.Given A=[{:(,3,0),(,0,4):}], B=[{:(,a,b),(,0,c):}] andAB=A+B, find the values of a,b and c. | 10...4:09Counter-Strike: Source
128.The resistance of a metal wire is 10 Omega . A current of 30 mA is flowing in it at 20^@ C. If p...4:08Counter-Strike: Source
129.Simplify and write in exponential form. a. p^(3)xxp^(5)xxp^(25) b. (-13)^(27)xx(-13)^(13) c. (11...4:08Counter-Strike: Source
130.A B C D\nis a\nparallelogram in which B C\nis produced\nto E\nsuch that C E=B C. A E\nintersects...4:07VlogCounter-Strike: Source
131.Aoverset(KCN)toBoverset(H_(3)O+)underset(NH_(3)//Delta)toCoverset(Br_(2))underset(KOH)toCH_(3)-C...4:03Counter-Strike: Source
132.भारत के लगभग सभी महानगरों जैसे दिल्ली का मुख्य वातावरणीयप्रदूषक है | 12 | पर्यावरणीय रसायन | C...4:02Counter-Strike: Source
133.Prove that a^2+b^2+c^2-a b-b c-c a\nis always non-negative for all values of a ,b a nd c. | 9 | ...4:01Counter-Strike: Source
134.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. ...4:01Counter-Strike: Source
135.दाब (p), परम ताप (T) एवं घनत्व (rho) के पदों में किसी गैस का समीकरण है | 12 | सॉल्वड पेपर 2017 C...4:01Counter-Strike: Source
136.A sum of money lent out at C.I. at a certain rate per annum becomes three times of itself in 8 y...4:00Counter-Strike: Source
137.How much percent more than the C.P. should a manufacture mark his goods so that after allowing a...4:00Counter-Strike: Source
138.Find the L.C.M. of 40, 36, and 126 by prime\r\nfactorization method. | 6 | PLAYING WITH NUMBERS ...3:58Counter-Strike: Source
139.अन्त:रोपण के पश्चात् अन्तर कोशिका समूह बाह्य ...A...मध्य ....B...तथा एक अन्तः.....c....में विभेद...3:58Counter-Strike: Source
140.ग्लूकोस किन अवस्थाओं में ग्लूकोनिक और सैकैरिक अम्ल में परिवर्तित हो जाता है? | 12 | जैव अणु | C...3:57Counter-Strike: Source
141.Human skin colour is controlled by 3 genes A, B and C. Which of the following genotypes will hav...3:57Counter-Strike: Source
142.कोशा में सल्फर डाइऑक्साइड (SO_2) द्वारा प्रभावित होने वाला भाग है | 12 | पारिस्थितिक सन्तुलन | C...3:57Counter-Strike: Source
143.What is the percent by mass of iodine needed to reduce the freezing point of benzene to 3.5^(@)C...3:56Counter-Strike: Source
144.By selling an article for\r\nRs 240, a man makes a profit of 20%.What is his C.P.? What would hi...3:56Counter-Strike: Source
145.A quadrilateral A B C D\nis such that diagonal B D\ndivides its area in two equal parts. Prove t...3:55Counter-Strike: Source
146.Calcualte the resistance of a steel wire of length 10m and diameter 0.6mm at 0^(@)C and 100^(@)C...3:55Counter-Strike: Source
147.By selling a bicycle for Rs. 5670 a trader gains Rs. 270. Find his gain per cent. [Hint: C.P. = ...3:55Counter-Strike: Source
148.In a 10 m deep lake, the bottom is at a constant temperature of 4^(@)C. The air temperature is c...3:54Counter-Strike: Source
149.A gas is filled in a container of volume V at 121^@ C. To what temperature should it be heated i...3:53Counter-Strike: Source
150.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 ...3:53Counter-Strike: Source
151.चालकता, तुल्यांकी चालकता एवं मोलर चालकता पर तनुता के प्रभाव को समझाइये। | 12 | वैधुत रसायन | C...3:52Counter-Strike: Source
152.The Bond energy of C=C, C-C, C-H and H-H are 147, 83, 99 and 104 kcal/mol respectively then calc...3:51Counter-Strike: Source
153.Construct a kit A B C D\nin which A B=4c m ,\\ B C=4. 9 c m\\ a n d\\ A C=7. 2 c mdot | 8 | PRAC...3:51Counter-Strike: Source
154.निम्न सेल के लिए E_(सेल)=0.78 वोल्टFe_((s))||underset((xM))(Fe_((aq))^(2+))||underset([0.01M])(C...3:50Counter-Strike: Source
155.The expression 4x^(3)-bx^(2)+x-c leaves remainders 0 and 30 when divided by x+1 and 2x-3 respect...3:50Counter-Strike: Source
156.सिद्ध कीजिए कि समकोणीय अतिपरवलय xy = c^(2)के बिन्दु (ct, (c )/(t))पर स्पर्शी का समीकरण (x)/(t) ...3:50Counter-Strike: Source
157.क्या दी-ब्रोगली समीकरण के आधार पर पृथ्वी को एक तरंग माना जाना चाहिए ? | 11 | परमाणु संरचना | C...3:43Counter-Strike: Source
158.If A=[{:(,1,4),(,2,1):}], B=[{:(,-3,2),(,4,0):}] and C=[{:(,1,0),(,0,2):}] simplify : A^2+BC. |...3:43Counter-Strike: Source
159.In the dissociation ofI_(2)(g) at 1000 K in a container of 1 litre :-I_(2)(g)rArr2I^(-)(g),K_(c)...3:43Counter-Strike: Source
160.{:(LIST - 1,LIST-2),(A) Colloidal,1) Liquid or solid or gas),(B) Crystalloid,2) 1m mu-1mu),(C) T...3:42Counter-Strike: Source
161.लीथियमकिस प्रकारमैग्नीशियमसे रासायनिकगुणों में समानताएँ दर्शाता है ? | 11 | S-ब्लॉक तत्त्व | C...3:42Counter-Strike: Source
162.A (-3, 4), B (3, -1) and C (-2, 4) are the vertices of a triangle ABC. Find the length of line ...3:41Counter-Strike: Source
163.ऐसीटैल्‍हिाइड तथा NaOH के जलीय विलयन की क्रिया का उत्पाद क्या है: | 12 | ऑक्सीजन युक्त यौगिक | C...3:41Counter-Strike: Source
164.P.V.C. के एकलक का नाम है- | 12 | बहुलक | CHEMISTRY | PRABODH PUBLICATION | Doubtnut3:40Counter-Strike: Source
165.Determine the L.C.M. of the numbers given\nbelow:\n28, 36, 45, 60 | 6 | PLAYING WITH NUMBERS | M...3:40Counter-Strike: Source
166.ABC is an isosceles triangle inwhich A B =A C. AD bisects exterior angle PAC and C D ||A B. Show...3:39ShowCounter-Strike: Source
167.Suppose line segments A B\\ a n d\\ C D\nintersect at O\nin such a way that A O=O D\\ a n d\\ O ...3:38Counter-Strike: Source
168.From Figure C, find out which wave hasa. low pitch and high volumeb. high pitch and low volumec....3:38Counter-Strike: Source
169.फलन tका सेल्सियसतापमानका फारेनहाइटतापमान में प्रतिचित्रणइस प्रकारपरिभाषितहै , t(C)=(9C)/(5)+32तो...3:38Counter-Strike: Source
170.निम्नलिखित में से कौन-सा अभ्यास हरित रसायन के अन्तर्गत नहीं आता है? | 11 | पर्यावरणीय रसायन | C...3:38Counter-Strike: Source
171.Delta H = Delta E + Delta nRT में Delta n का मान कभीशून्य नहीं होता है। | 11 | उष्मागतिकी | C...3:37Counter-Strike: Source
172.किसी धातु (परमाणु भार= 60) की क्रिस्टल संरचना f.c.c.एवं यूनिट सेल की कोर लम्बाई400pm हो, तो उसके...3:37Counter-Strike: Source
173.A, B and C represent switches in \'on\' position and A\', B\' and C\' represent themin \'off\' p...3:36Counter-Strike: Source
174.डाइसैकेराइड क्या हैं ? इनके प्रकार तथा किसी एक के रासायनिक परीक्षण भी लिखिए | | 12 | जैव अणु | C...3:35Counter-Strike: Source
175.निम्न तत्वों के समूहों में कौनसा न्यूलैण्ड अष्टक नियम का पालन करता है :- | 12 | आवर्त सारणी | C...3:34Counter-Strike: Source
176.A B C D\nis a parallelogram, if the two diagonals are\nequal, find the measure of /_A B C. | 9 |...3:33VlogCounter-Strike: Source
177.Verify that a -: (b+c) != (a -: b) +(a -: c) for each of the following values of a, b and c.,(a)...3:33Counter-Strike: Source
178.The boiling point of an aqueous solution of a non-volatile solute is 100.15^(@)C. What is the fr...3:33Counter-Strike: Source
179.2 वर्ग के तत्त्वों में किस तत्त्व की आयनन एन्थैल्पी का मान निम्नतम | 11 | S- ब्लॉक के तत्व | C...3:32Counter-Strike: Source
180.It is found that electromagnetic signals sent inside glass sphere from A towards B reach point C...3:31Counter-Strike: Source
181.In a triangle A B C ,\nif 2/_A=3/_B=6/_C ,\ndetermine /_A ,/_B\nand /_C. | 9 | CONGRUENT TRIANGL...3:31Counter-Strike: Source
182.A wall has two layers A and B, each made of different materials. Both the layers have the same t...3:31Counter-Strike: Source
183.ऐल्कीन, जो ज्यामितीय समावयवता पदर्शित करती है | 12 | कार्बनिक रसायन के कुछ मूलभूत सिद्धान्त | C...3:31Counter-Strike: Source
184.Construct a cumulative frequency distribution table from the following frequency table : {:( C.I...3:30Counter-Strike: Source
185.Match Column - I with Column - II. {:(,Column - I,,Column - II),((A),NaCl(C.N. of Na^(+)),(p),4)...3:30Counter-Strike: Source
186.Dinesh went from place A to place B and from there to place C. A is7.5 km from B and B is 12.7 k...3:30Counter-Strike: Source
187.A, B, C are points in a vertical line such that AB = BC. If a body falls freely from rest at A a...3:29Counter-Strike: Source
188.Find the H.C.F. of 624, 936 and 264 | 6 | PLAYING WITH NUMBERS | MATHS | RD SHARMA ENGLISH | Dou...3:29Counter-Strike: Source
189.Find the H.C.F. of 180 and 336. Hence, find their L.C.M. | 6 | FACTORS AND MULTIPLES | MATHS | I...3:27Counter-Strike: Source
190.Infigure, ABC is triangle in which angleABCgt90^@ andA D_|_C Bproduced.Prove that A C^2=A B^2+B ...3:26Counter-Strike: Source
191.क्या होता है जब? ईथर की लाल फॉस्फोरस तथा HI के साथ अभिक्रिया होती है। | 12 | क्या होता है जब | C...3:26Counter-Strike: Source
192.क्या होता है यदि एक कोशिका को 0.4% (द्रव्यमान/आयतन) NaCl विलयन में रखा जाता है | 12 | विलयन | C...3:24Counter-Strike: Source
193.Evaluate: 7+9+5+4 in the order specified: a. add the first two terms, add the last two terms and...3:24Counter-Strike: Source
194.In a triangle A B C ,\nif a : b : c=3:7:8,t h e n R : r\nis equal to\na.2:7\nb. 7:2\nc. 3:7\nd. ...3:24Counter-Strike: Source
195.ईंधन सेल का एक उदाहरण लिखिए। इसकी दो विशेषताएं भी लिखिए। | 12 | QUESTION PAPER 2011 PART 1 | C...3:24Counter-Strike: Source
196.A body cools from 62^(@)C to 50^(@)C in 10 minutes and to 42^(@)C in the next 10 minutes. Find t...3:24Counter-Strike: Source
197.When a calorimeter contains 40g of water at 50^(@)C, then the temperature falls to 45^(@)C in 10...3:23Counter-Strike: Source
198.निम्न यौगिक का IUPAC नाम है {:( CH_3),(|),(CH_3CH_2CH_2CH_2CH_2-CH-C-CH_2CH_3),(||),( CH_3 CH_2C...3:23Counter-Strike: Source
199.In a series L.C.R. circuit, the potential drop across L, C and R respectively are 40V, 120V and ...3:22Counter-Strike: Source
200.यदि A+B+C=pi हो तो सिद्ध कीजिए कि sin2A+sin2B-sin2C=4cosAcosBsinC. | 12 | त्रिकोणमितीय सर्वसमिक...3:21Counter-Strike: Source