Mehapatel

i) De-broglie wavelength ( of moving particles varies with their linear momentum (p).De-broglie wavelength varies inversely proportional with the linear momentum.ii) In interference, the moving particles exhibit wave nature.

Any process in which no heat is allowed to be exchanged with surroundings is called an adiabatic process. Essential conditions for the adiabatic process to take place are: i) System is perfectly insulated from surrounding. ii) The process must be carried out rapidly so that the system hs sufficient time to exchange heat with the surroundings. 

? = 40 x12 + 3 - 6÷60On changign the signs,? = 40 + 12 ÷ 3 x 6 - 60? = 40 + 4 x 6-60? = 40 + 24 - 60? = 64-60 = 4? = 4

Here P = Rs 8000,   T = 1 year,    R = 9% p.a.Interest is compounded half yearly,∴       T = 1 year = 2 half years         R = 9% p.a.= half yearly
∵         Amount =                      = Rs 8000                      = Rs.                                           = Rs                               CI = Rs 8736.20 - Rs 8000                      = Rs 736.20

(a)
(i) Propanone to Propan-2-ol
 
 
(ii) Ethanal to 2-Hydroxypropanoic acid
 
 
 
(iii) Toluene to benzoic acid.
 
 
(b)
(i) Pentan-2-one and Pentan-3-one
 
 
By Iodoform Test
Pentan-2-one being a methyl ketone when treated with NaOI (I2/NaOH) gives yellow precipitate of iodoform but pentan-3-one does not.
 
 
(ii) Ethanal and Propanal
 
 
By Iodoform test
Ethanal containing group CH3-C=O linked to H, reacts with I2/NaOH (or NaOI) to give yellow precipitate of iodoform but propanal does not contain group CH3-C=O linked to H or C and hence does not react with I2/NaOH to

We have x2 – 5x + 6 – x2 – 3x – 2x + 6= (x – 3) (x – 2)So, the value of x2 – 5x + 6 is zero when x - 3 = 0 or x – 2 = 0i.e., when x = 3 or x = 2Therefore, the zeroes of x2 – 5x + 6 are 3 and 2.Sum of zeroes =                         = Product of zeroes

Textbook solutions for class 9 10 11 12. Find textbook questions and answers for gsebe class eighth, ninth, tenth, eleventh, twelfth online.

 In the figure given, the tangent to the circular ring in the plane of the ring is shown. Let, the tangent be represented by XY and diameter be represented by AB. Using the theorem of parallel axes, we have IXY = IAB + M (R)2       =  i.e., IXY = Therefore, the moment of inertia of ring about tangent in the plane of the ring is 3/2 MR2.

by using half life equation, we getK = 0.693t1/2K = 0.69330 min = 0.0231 at 27°C or 300 KK = 0.69310 min = 0.0693 at 47°C or 320 KFrom the Arrhenius equationlogk2k1 = Ea2.3031T1-T2    Ea = 2.303×R×T1×T2T2-T1log k2k1= 2.303 × 8.314 J K-1 mol-1×300×320 K320 K - 300 K              log 0.06935-10.02315-1 = 43.848 kJ mol-1.

Answer :- Adivasis

NCERT solutions for class 8 9 10 11 12. Find NCERT textbook questions and answers for cbse Class class 8 9 10 11 12.

ऊर्जा की खपत  =250 kWh 1 kWh = 3.6 x 106 J
∴ 250 ऊर्जा की खपत = 250 x 3.6 x 106                                  = 9 x 108 J.

In open chain structure of glucose and fructose the sum of the number of primary alcoholic group is 3.

Conversion of benzyl bromide to β-phenyl ethylamine.

Crystal Field Splitting Energy: Crystal field theory was given to explain the structure and stability of the coordination complexes. This theory has some assumption like the metal ion is considered to be a point positive charge and the ligands are negative charge. The complexes are formed mainly by the d- block elements due to their variable oxidation states and variable coordination number. The d- subshell has 5 degenerate orbitals. when the ligand approach to the metal ion, the energy of the degenerate orbitals is increased and further splitting of degenerate orbital takes place into t2g an

The equation of the line 5x-25 =14-7y =35z can be rewritten asSince the required line is parallel to the given line, so the direction ratio of the required line is proportional to 7,-5,1The vector equation of the required line passing through the point (1,2-1) and having direction ratios proportional to 7,-5 1 is

नवाब साहब ने बहुत नजाकत और सलीके से खीरा काटा, उन पर नमक-मिर्च लगाया। उन नमक-मिर्च लगी खीरे की फाँकों को खाया नहीं अपितु सूँघकर खिड़की से बाहर फेंक दिया था। उनकी इस हरकत का यह कारण होगा कि वे एक नवाब थे, जो दूसरों के सामने खीरे जैसी आम खाद्‌य वस्तु खाने में शर्म भव करते थे। लेखक को अपने डिब्बे में देखकर नवाब को अपनी रईसी याद आने लगी। इसीलिए उन्होंने खीरे को मात्र सूँघकर ही खिड़की से बाहर फेंक दिया।
नवाब साहब के ऐसा करने से ऐसा लगता है कि वे दिखावे की जिंदगी जी रहे हैं। वे दिखावा पसंद इंसान थे। उनके इसी प्रकार के स्वभाव ने लेखक को देखकर खीरा खाना अपमान समझा।
गुड -शक्कर, मूँगफली, तिल, चाय, कॉफी

i) Underlying principle of a step-up transformer: A transformer which increases the ac voltage is known as a step up transformer.
Working of step-up transformer is based on the principle of mutual inductance and it converts the alternating low voltage to alternating high voltage. The number of turns in the secondary coil is greater than the number of turns in the primary coil.                      
i) Underlying principle of a step-up transformer: A transformer which increases the ac voltage is known as a step up transformer.
Working of step-up transformer is based on the principle of mutu

The difficulties that one would face in classification of animals if common fundamental features are not taken into account are as following:(i) Animal kingdom consists of a large number of organisms. If the common fundamental characteristics are not considered for classification, each organism will have to be placed in a different group. Thus, the study of the organisms would become nearly impossible and it would be very tough.(ii) Without common fundamental features, it would be very difficult to segregate the organisms into groups.(iii) Without segregation into groups, comparing different

Seemapuri is still in wilderness but it is no longer empty. In 1971 it was inhabited illegally by more than 10,000 rag-pickers from Bangladesh in 1971. It is on the periphery of Delhi yet it is miles away from it metaphorically. People live in structures of mud, with roofs of tin and tarpaulin. It is devoid of sewage, drainage and running water. They have got ration cards for votes and buying grains. They have no identity. Women move in tattered saris. Survival in Seemapuri means rag-picking.