Kya Hoti h Pomodoro Technique|Sabse Acha Tarika Padhne ka#!#Score 95/100

To receive grade A in a cource,one must obtain an average of 90 marks or more in five papers each of 100 marks.If Shikha scored 87 ,95,92 and 94 marks in first four papers find the minimum marks that she must score in the last paper to get grade A in the course.

Solve the following systems of inequalities for all xinR In the first four papers each of 100 marks, Rishi got 95, 72, 73, 83 marks. If he wants an average of greater than or equal to 75 marks and less than 80 marks find the range of marks he should score in fifth paper.

Equivalence point' in an acid base titration is defined as that point where equivalents of acid become equal to equivalents of base.In case of monoprotic acids and bases there is a single equivalence point, whereas in case of polyprotic acids and bases there may be multiple equivalnece points. Depending upon the type of suybstances present, pH of the soution can be calculated at nay equivalence point. given that: Ka_(1),H_(3)PO_(4)=5xx10^(-4) Ka_(2), H_(3)PO=5xx10^(-8) Ka_(3),H_(3)PO_(4)=4.5xx10^(-11) (Use: log 2 = 0.3, log 3 =0.4) The pH of the solution when 100 ml of 0.1 M NaOH solution at 298 K Is:

In the first four papers each of 100 marks, Rishi got 95,72,73,83 marks.If he wants an average of greater than or equal to 75 marks and less than 80marks,find the range of marks he should score in the fifth paper.

10 " mL of " a gaseous hydrocarbon is exploded with 100 " mL of " oxygen. The residual gas on cooling is found to measure 95 mL, of which 20 mL is absorbed by caustic soda and the remaining by alkaline pyrogallol. The formula of the hydrocarbon is (a). CH_4 . (b). C_2H_6 (c). C_2H_4 (d). C_2H_2

Ten millilitre of a gaseous hydrocarbon is exploded with 100 ml of oxygen. The residual gas on cooling is found to measure 95 ml. Of which 20 ml is absorbed by caustic soda and the remaining by alkaline pyrogallol. The formula of the hydrocarbon is: (a). CH_4 (b) C_2H_6 (c) C_2H_4 (d) C_2H_2

Gaseous fuels due to their advantages over ther tupes of fuels are becoming highly popular . The advantages fo the fgaseous fuels are as follows : a. High calorigic value . b. Do not produce smoke and do not leave ash after combstion . c. They can flow through pipes and can be ignige at a moment's notic eat any place . No sp-ecial devices are required for their combustion . i. Coal gas is a good gaseous fuel as it conitains 95^5 combustible gaseous such as H_2, CH_4, CO etc , It is obtained buy destructive distillation of coal at 100^@ C . ii. Water gas is a mixture of CO and H_2 and is prepared by passing steam over incandescnt coke . The reaction is owever endothermic . iii. Producer gas , which possesses low calorific value, so prepared by passing aair over red hot coke . It contains mainly nitrogen and CO iv. Semi-water gas is a mixture of water fas and producer fas . v. oil gas , which is used in laboratries , is obtained by cracking of kerosene . It is a mixture of hydrocarbon (saturated and unsatureated ) mainly lower hudrocarons . iv. LPG , which contains C_3 and C_4 hydrocarbon of the alkane and alkene serties , suppied in cylinders for domestic uses is very populsr these days . Which fuel has the highest calorific value ?