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 100 Counter-Strike: Source Videos With The Longest Duration by Doubtnut


Video TitleDurationCategoryGame
1.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...12:04Counter-Strike: Source
2.Figure shows rectangle ABCD. Points A and D are on the parabola y = 2x^(2)-8, and points B and C...11:49ShowCounter-Strike: Source
3.Classify the following reactions into- a. Direction combination b. Decomposition c. Displacement...10:36Counter-Strike: Source
4.Compound (A) has molecular formula C_(5)H_(12)O. It liberates H_(2) gas on reaction with Na-Metl...9:55Counter-Strike: Source
5.Calculate the equilibrium constant of the reaction : Cu(s)+2Ag(aq) hArrCu^(2+)(aq) +2Ag(s) E^(c-...9:29Counter-Strike: Source
6.साम्य अवस्था पर डेनियल सेल के लिए नेर्नस्ट समीकरण लिखिए एवं E_(सेल)^(@) तथा साम्य स्थिराक (K_(C)...9:12Counter-Strike: Source
7.सिद्ध कीजिए-(i) [x^((1)/(a-b))]^((1)/(a-c))*[x^((1)/(b-c))]^((1)/(b-a))*[x^((1)/(c-a))]^((1)/(c-...8:54Counter-Strike: Source
8.Three block A,Band C whose masses are m,km and 4m respectively kept at rest on the horizontal sm...8:45Counter-Strike: Source
9.Let A=[{:(,4,-2),(,6,-3):}], B=[{:(,0,2),(,1,-1):}] and C=[{:(,-2,3),(,1,-1):}]. Find A^2-A+BC. ...8:31Counter-Strike: Source
10.निम्नलिखित को समझाइए -(i ) भर्जन(ii ) निस्तापन (iii ) प्रगलन(iv ) गालक | 10 | धातु और अधातु | C...8:06Counter-Strike: Source
11.Define the following: a. Fusion, b. Fusion point, c. Solidification, d. Solidification point e. ...8:05Counter-Strike: Source
12.M.K.S एवं C.G.S पद्धति में श्यानता गुणांक के मात्रकों का अनुपात ज्ञात कीजिए। | 11 | मात्रक एवं म...8:04Counter-Strike: Source
13.Consider 3 identical balls, each having mass of 0.1 kg. The ball A has an initial velocity of 10...8:01Counter-Strike: Source
14.Simplify. \nltbgt (i) (x²-5) (x+5)+25\n (ii)(a²+5) (b³+3)+5\n (iii)(t+s²) (t²-s) \n (iv)(a+b)(c-...8:00Counter-Strike: Source
15.If the points A (2,9), B (a,5) and C (5,5) are the verticesof a triangleABC. Right-angled at B, ...7:57Counter-Strike: Source
16.निम्नलिखित अभिक्रियाओं में मुख्य उत्पाद (Y) है: CH _(3) - overset(CH _(3)) overset(|) (CH) - C -...7:57Counter-Strike: Source
17.For the reaction A+B rarr C. The following data were obtained. In the first experiment, when the...7:54Counter-Strike: Source
18.निम्नलिखित के IUPAC नाम लिखिए(i) CH_(3)CONH_(2) (ii) (CH_(3))_(2) CHCH_(2) COCl (iii) CH_(3)-O-C...7:34Counter-Strike: Source
19.Can an equilateral triangle be a, an acute-,b. a right-, and c. an obtuse-angled triangle ? What...7:32Counter-Strike: Source
20.If a,b,c are distinct real number different from 1 such that (log_(b)a. log_(c)a-log_(a)a) + (lo...7:22VlogCounter-Strike: Source
21.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...7:20VlogCounter-Strike: Source
22.An ammeter A of finite resistance, and a resistor R are joined in series to an ideal cell C. A p...7:16Counter-Strike: Source
23.Construct a triangle ABC in which BC = 8 cm, angle B = 45° and angle C = 30° Construct another t...7:14Counter-Strike: Source
24.Comprehension\r\n1\nLet\r\na^((log)_b x)=c\\ w h e r e\\ a ,\\ b ,\\ c\\ &\\ x\\ \nare\r\nparame...7:12VlogCounter-Strike: Source
25.100 c.c of N/10 NaOH solution is mixed with 100 c.c of N/5 HCI solution and the whole volume is ...7:02Counter-Strike: Source
26.If a,b,c are the sides of triangle ABC satisfying log (1 +c/a)+log a - log b = log 2. Also a(1 -...7:01VlogCounter-Strike: Source
27.There are 3 urns A, B and C. Urn A contains 4 red balls and 3 black balls. Urn B contains 5 red ...6:58Counter-Strike: Source
28.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...6:52Counter-Strike: Source
29.Imagine a system, that can keep the room temperature within a narrow range between 20^@C to 25^@...6:48Counter-Strike: Source
30.Let a^((log)_b x)=c\\ w h e r e\\ a ,\\ b ,\\ c\\ &\\ x\\ \nare\nparameters.\nOn the basis of ab...6:46VlogCounter-Strike: Source
31.निम्नलिखित यौगिकों में नाभिकस्नेही योगात्मक अभिक्रिया के लिए आपेक्षिक अभिक्रिया दर का क्रम होगाC...6:45Counter-Strike: Source
32.D, E and F arerespectively the mid-points of the sides BC, CA and AB of aDeltaA B C. Show that (...6:44ShowCounter-Strike: Source
33.A B C D\nis a parallelogram. If A B\nis produced to E\nsuch that B E=A B\n. Prove that E D\nbise...6:43VlogCounter-Strike: Source
34.Find the L.C.M. of the given numbers by division method: (i) 12, 32 (ii) 480, 672 (iii) 6, 8...6:41Counter-Strike: Source
35.हेनरी के नियम के संबंध में निम्नलिखित में से कौन सा कथन सही नहींहै? | 12 | JEE-MAIN TEST 31 | C...6:40Counter-Strike: Source
36.निम्नलिखित किसमें 12 वर्ष में सिर्फ एक बार पुष्प खिलते हैं? | 12 | QUESTION BANK | BIOLOGY | S C...6:38VlogCounter-Strike: Source
37.An alkyl bromide A has molecular formula C_(8)H_(17)Br and four different structures can be draw...6:34Counter-Strike: Source
38.A computer machanic in Delhi charges repairing cost from five different persons A,B,C, D and E w...6:32Counter-Strike: Source
39.1 Kg of ice at -20^(@)C is mixed with 2 Kg of water at 90^(@)C. Assuming that there is no loss o...6:28Counter-Strike: Source
40.InFigure, ABD is a triangle right-angled at A and A C_|_B D.Show that(i)A B^2=B C.B D(ii) A C^2=...6:26ShowCounter-Strike: Source
41.Find the H.C.F. of the given numbers by prime factorisation method: (i) 28, 46 (ii) 25, 65 (...6:24Counter-Strike: Source
42.A glass cylinder contains m_0=100g of mercury at a temperature of t_0=0^@C. When temperature bec...6:24Counter-Strike: Source
43.100Omega प्रतिघात वाली कुण्डली और 100Omegaप्रतिरोध की एक कुण्डली को 240 V, 50 Hz की a.c. सप्लाई ...6:18Counter-Strike: Source
44.फलक केंद्रित घनीय (f.c.c) सेल कैसे बनता है? इसके यूनिट सेल में परमाणुओं की संख्या ज्ञात कीजिए| ...6:13Counter-Strike: Source
45.Aniline can be obtained by : (a)C_(6)H_(5)COOHunderset(H^(o+))overset(N_(3)H)(to) (b)C_(6)H_(5)C...6:11Counter-Strike: Source
46.एक रंगहीन यौगिक .A. (C_6 H_7 N) जल में बहुत कम घुलनशील है और खनिज अम्ल के साथ अभिक्रिया से जल मे...6:11Counter-Strike: Source
47.निम्नलिखित के I.U.P.A.C. नाम बताइए। a. underset(CH_(2)-COOH)underset(|)(CH_(2))-COOH b. CH_(3)-u...6:01Counter-Strike: Source
48.DNA के दो रज्जुक समान नहीं होते, अपितु एक दूसरे के पूरक होते हैं समझाइए । | 12 | जैव - अणु | C...5:58Counter-Strike: Source
49.The total number of halogenated products likely to be formed by ethance is: | 11 | ISOMERISM | C...5:58VlogCounter-Strike: Source
50.triangleABC में यदिcos^(2)A + cos^(2)B + cos^(2)C = cosB cosC + cosC. cosA + cosAcosB तो सिद्ध क...5:49Counter-Strike: Source
51.Calculate the vapour pressure of solution having 3.42g cane sugar in 180 g water at 40^(@)C and ...5:47Counter-Strike: Source
52.निम्नलिखित प्रक्रमों में से किसमें आयरन का ऑक्सीकरण नहींहोता है | 12 | रेडॉक्स अभिक्रियाएँ | C...5:46Counter-Strike: Source
53.उभयनिष्ठ उत्सर्जक विधा में किसी क्षण आधार धारा I_(B) उत्सर्जक धारा I_(E) तथा संग्राही धारा I_(C)...5:45Counter-Strike: Source
54.Ph-underset(O)underset(||)(C)-CH_(3)overset(NaOCl)(to)A+ salt A+CH_(3)-underset(O)underset(||)(C...5:45Counter-Strike: Source
55.From the following metallurgical flow chart, identify steps A, B and C. Sulphide overset((A))rar...5:45Let's PlayCounter-Strike: Source
56.In a bolt factory three machines A ,B and C manufacture 25% , 35% and 40% of the total productio...5:43Counter-Strike: Source
57.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\...5:42Counter-Strike: Source
58.Can a triangle have a, two acute, b. two obtuse, and c. two right angles. | 7 | THE TRIANGLE AND...5:42Counter-Strike: Source
59.510 milli g of a liquidon vapourisation in Victor Mayer \'s appartus displaces 510 c c. of dry a...5:42Counter-Strike: Source
60.यदि vec(a),=(vec(b)xx vec(c))/([vec(a)vec(b)vec(c)])\'vec(b)\'=(vec(c)xx vec(a))/([vec(a)vec(b)v...5:38Counter-Strike: Source
61.An organic compound A contains C= 68.85%, H=4.9% and reacts with NH_(2)OH. On treatment with NaO...5:37Counter-Strike: Source
62.A body having mass 2 Kg cools in a surrounding ofconstant temperature 30^(@)C. Its heat capacity...5:36Counter-Strike: Source
63.हाइड्रोजन परॉक्साइड के सुरक्षितभण्डारण के लिए क्या सावधानियाँरखनी चाहिएँ ? | 11 | हाइड्रोजन | C...5:30Counter-Strike: Source
64.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...5:28Counter-Strike: Source
65.Find the H.C.F. and L.C.M. of the following\npairs of numbers:\n(i) 117, 221 (ii) 234, 572\n(iii...5:27Counter-Strike: Source
66.Prove that |{:(cos(A-P),cos(A-Q),cos(A-R)),(cos(B-P),cos(B-Q),cos(B-R)),(cos(C-P),cos(C-Q),cos(C...5:26Counter-Strike: Source
67.A thermocouple has its junctions at 0^@ C and 100^@ C. It produces 0.022mV/K. Find the balancing...5:25Counter-Strike: Source
68.A glass flask with volume 200 cm^(3) is filled to the brim with mercury at 20^(@)C. How much mer...5:20Counter-Strike: Source
69.For a gaseous reaction A(g) + 3 B(g) rightarrow 3C(g) + 3D(g) Delta E is 27 kcal at 37^(@)C. Ass...5:20Counter-Strike: Source
70.The density of a gas is found to be 1.56 g L^(-1) at 745 mm pressure and 60^(@)C. Calculate the ...5:17Counter-Strike: Source
71.Given : CP is bisector of angle C of DeltaABC.Prove : P is equidistant from AC and BC. | 10 | LO...5:15Counter-Strike: Source
72.D and E arepoints on sides AB and AC respectively ofDelta A B C such that a r\\ (D B C)\\ =\\ a ...5:10Counter-Strike: Source
73.उत्प्रेरक विष तथा उत्प्रेरक वर्धक में क्या अन्तर है? उदाहरण सहित समझाइए। | 12 | पृष्ठ रसायन | C...5:09Counter-Strike: Source
74.A given mass of water is cooled from 10^(@)C to 0^(@)C. State the volume changes observed. Repre...5:07Counter-Strike: Source
75.माना A,B,C युग्मतः स्वतंत्र घटनाएं हैं जहां P(C)gt0 है तथा P(AnnBnnC)=0 तो (A^(c)nnB^(c)|C) बराब...5:05Counter-Strike: Source
76.When composite rod is free, composite length increase to 2.002m from temperature 20^(@)C to 120^...5:05Counter-Strike: Source
77.यदि (1+x)^(n)=sum_(r=0)^(n)C_(r)x^(r), (1+(C_(1))/(C_(0)))(1+(C_(2))/(C_(1))). . . (1+(C_(n))/(C...5:05Counter-Strike: Source
78.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 ...5:02Counter-Strike: Source
79.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...5:01Counter-Strike: Source
80.चित्र में एक आदर्श गैस का कार्नो-चक्र प्रदर्शित किया गया है। माना कि प्रक्रमों a to b, b to c, c...5:01Counter-Strike: Source
81.Find n if : a. (3^(4))^(5)=(3^(2))^(n) b. 5^(12)=125^(n) c. 7^(2n+4)xx7^(4)=(7^(8))^(2) d. 8^(6)...4:54Counter-Strike: Source
82.अन्तः केंद्रित घनीय (b.c.c) सेल कैसे बनता है? इसके यूनिट सेल में परमाणुओं की संख्या ज्ञात कीजिए|...4:54Counter-Strike: Source
83.Find the H.C.F. of 1260 and 2376 by prime\r\nfactorization method. | 6 | PLAYING WITH NUMBERS | ...4:52Counter-Strike: Source
84.The difference between C.I. and S.I. on Rs 7,500 for two years is Rs 12 at the same rate of inte...4:51Counter-Strike: Source
85.2HgCl_2 + SnCl_2- Hg_2Cl_2+ SnCl_4 में असत्य कथन है | 12 | रसायनिक अभिकिर्याएँ एवं उत्प्रेरण | C...4:46Counter-Strike: Source
86.A sum of money lent out at C.I at a certain r% (rate of growth) doubles itself in 5 years. Find ...4:43Counter-Strike: Source
87.Heavy radioactive nucleus decay through alpha-decay also. Consider a radioactive nucleus x. It s...4:43Let's PlayCounter-Strike: Source
88.If int(x+1)/(x^2+x+3)dx=a ln|x^2+x+3|+1/(sqrt(b))tan^(-1)((c x+d)/(sqrt(11)))+k ,\nthen the valu...4:42Counter-Strike: Source
89.The latent heat of fusion of ice is 80 calories per gram at 0^(@)C. What is the freezing point o...4:41Counter-Strike: Source
90.स्टीफेन्स अभिक्रिया से केवल ऐल्डिहाइड बनते हैं। | 12 | ऐल्डिहाइड, कीटोन व कार्बोक्सिलिक अम्ल | C...4:41Counter-Strike: Source
91.A B C D\nis a\nparallelogram, G\nis the\npoint on A B\nsuch that A G=2\\ G B ,\\ E\\ \nis a poin...4:40VlogCounter-Strike: Source
92.चित्र में दिखाए अनुसार परिपथ में, A.C. स्रोत एक वोल्टता V=20 cos(2000t) देता है। स्रोत प्रतिरोध ...4:39Counter-Strike: Source
93.Determine the H.C.F of the following numbers by\nusing Euclid’s algorithm \n(i) 300, 450 (ii) 39...4:38Counter-Strike: Source
94.The freezing point of a solution containing 5.85 gof NaCl in 100 8 of water is -3.348^(@)C. Calc...4:38Counter-Strike: Source
95.A polygenic trait is controlled by 3 genes A, B and C. In a cross AaBbCc xx AaBbCc, the phenotyp...4:37Counter-Strike: Source
96.रासायनिक समीकरण देते हुए बेरियम पराक्साइड से H_2O_2के बनाने की विधि लिखिए। | 11 | हाइड्रोजन | C...4:37Counter-Strike: Source
97.वह युग्म जिसमे दोनों स्पीशीज का समान चुंबकीय आघूर्ण होता है : | 12 | d तथा f-ब्लॉक के तत्व | C...4:36Counter-Strike: Source
98.Consider the reaction, (CH_(3))_(3)C-underset(CH_(3))underset(|)CH-OH+Conc. HClrarrX. The produc...4:35Counter-Strike: Source
99.The vertices of a DeltaABC are A(3, 8), B(-1, 2) and C(6, 6). Find :(i) Slope of BC.(ii) Equatio...4:34Counter-Strike: Source
100.Write three equivalent ratios of : a. 4:9 b. 3:8 c. 3:4 d.5:7 | 6 | RATIO AND PROPORTION | MAT...4:33Counter-Strike: Source