Questions asked by Nitesh S.

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• A plant species A has a diploid number of chromosomes as 12. Another plant species B has a diploid number of chromosomes has 16. The allopolyploid developed by hybridization of Aand B shall have a diploid chromosomes number as? (1) 14 (2) 28 (3) 40 (4) 56
  
• To a 50 mL of 0.05M formic acid how much volume of 0.10M sodium formate must be added to get a buffer solution of pH 4.0 ? (pKa of the acid is 3.8) (1) 50 mL (2) 4 mL (3) 39.6 mL (4) 100 ml.
  
• Question details are below ?
  
• KF has NaCl structure. What is the distance between#K^+#and#F^-# ions in KF, if density is 2.48 #g//cm^3# ? (1) 537.5 pm (2) 268.8 pm (3) 155.3 x 10 cm (4) 5.375 cm
  
• #int(x^2+x+2)/{(x-1)(x-2)}dx# with respect to x ?
  
• If the pressure in a reaction vessel for the following reaction is increased by decreasing the volume, what will happen to the concentrations of CO and CO2? #H_2O (g)+ CO_2 (g) rightleftharpoons H_2 (g)+ CO_2 (g)+heat#
  
• The work- function of a substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately ?: (1) 540 nm (2) 400 nm (3) 220 nm (4) 310 nm
  
• A particle execute S.H.M with frequency f. Find frequency with which its kinetic energy oscillates?
  
• A particle of mass 10kg is placed in potential field given by #V = (50x^2 + 100)# erg/g. What will be frequency of oscillation of particle ?
  
• The kinetic energy of a particle increases continuously with time . Then select correct alternative. ?
  
• A body is moving with a velocity v, breaks up into two equal parts.One of the part retraces back with velocity v. Then the velocity of the other part is ? :-
  
• For the redox reaction, #MnO_4^(-) + C_2O_4^(2-) + H^(+) -> Mn^(2+) + CO_2 +H_2O# The correct coefficients of the reactants for the balanced reaction are respectively, #MnO_4^-# , #C_2O_4^(2-)# , #H^+# ? :-
  
• A circular loop wire with current #I_1 = I_@/pi# and a V shaped wire with current #I_2# are arranged in a plane as shown in diagram. If magnetic field at O is zero, value of #I_2# is ? (a)#13aI_@/35r# (b)#12aI_@/17r# (c)#aI_@/r# (d)#12aI_@/35r#
  
• A circular loop wire with current I1=I∘π and a V shaped wire with current I2 are arranged in a plane as shown in diagram. If magnetic field at O is zero, value of I2 is ? (a)#(13aI_@)/35r# (b)#(12aI_@)/17r# (c)#(aI_@)/r# (d)#(12aI_@)/35r#
  
• Question details is given in picture below?
  
• Correct major product of reaction is ?
  
• Three large metal plates are arranged as shown. How much charge will flow through the key if it is closed ?
  
• A particle moves along the x-axis according to the #x = A(1+sinomegat)#. What distance does it travel between t = 0 and #t = (2.5pi)/omega#?
  
• Please Someone?