Questions asked by Haya

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• 50g of each reactant is available during reaction #2"SO"_2(g) + "O"_2(g) -> 2"SO"_3(g)#, which is limiting reactant?
  
• 79.7g of blue vitriol reacts with KI then find the volume of I2 at STP 4CuSO4+4KI=Cu2I2+2K2SO4+I2?
  
• Naturally occuring silicon is amixture of three isotopes 28Si, 29Si, 30SI the relative mass of silicon is 28.1 what could be the relative abundance of each of the three isotopes?
  
• One.liter of an unknown gas weigh 24.3 grams at.standard pressure and -273 degree centigrade one possible formula of gas is 1 CO2 , 2 H2 3, O2 4, SO2?
  
• Weight of an object on the moon is 100N its weight on the earth will be, 1, 100N 2, 1200N 3, 50N 4, none?
  
• If pressure on a gas is increased from 2atm to 4atm than its volume decreases from 1, 6Lto 4L 2, 8L to2L 3, 3Lto1L 4, 4L to 2L?
  
• Two bodies of masses 4g and 16g are moving with equal Kientic energy then the ratio of their momentum will be answer is 1:2 but how?
  
• What will the change in energy of a capacitor when its voltage is increased by20% a, 22%b, 44%, c33% d 55%?
  
• If the moment of inertia of wheel is found to be 1/2mr2 then which of the following will represent the velocity when it rolls down from. A height of "H" TO the ground?
  
• Two convex lenses of focal length 0. 2m and 0. 05 m are used to make a telescope the distance kept between them is equal to?
  
• The length of telescope is 100cm and magnification is 9 the focal length of objective and eyepiece is ? answer is 90cmamd 10cm but how?
  
• The speed of light in certain transparent is two fifth of its speed in air the index of refraction is?
  
• Aaconverging lens of focal length 15 mm is used as a magnifying glass for inspecting stamp. A rectangular stamp which is 20mm 40mm is placed 30mm from the lens find the length of the image of the 20mm side of the stamp?
  
• If a radio and bulb ra h of resistance 3ohm are connected in series of 12volts battery the potential difference across each will be, a, 6v b, 3v c, 13v?
  
• How many grams of NaCl required to completely neutralize 100ml of 1M of H2SO4?
  
• When 0. 24g of magnesium is reacted with excess HCL what volume of gas is l When 0. 24g of magnesium is reacted with excess HCL what volume of gas is liberated at RTP?
  
• What is the normality of 2M solution of phosphoric acid of an acid base titration?
  
• The position vector of a particle is given by r=3t2i+4t2j+7k find the displacement after 10 second?
  
• A generator produce 100kwatt power at a potential difference of 10 KV the power transmitted through cable of total resistance 5 ohm how much power dissipated in the cables?
  
• The following equilibrium concentration exists when Agbr is in solution AgBr=Ag +Br , Ksp =7. 7*10-13 , calculate solubility of AgBr in g/l in a solution of 0. 0010M NaBr?
  
• The value of kc for H2+CO2=H2O+ CO is 1.88 AT 1000c if 1 mole of H2 and cO2 are placed in 1LITER FLASK. The final equilibrium concentration of CO at 1000c is?
  
• 200 joule of energy is supplied to machine which is 40% efficient amount of energy lost is?
  
• Kinetic energy of body is increased by 300 % momentum of body is increased by?
  
• When air at 300k and 1 atm pressure is compressed to one.twentieth of its original volume and 30 atm pressure the new temperature will be?
  
• The molar specific heat capacity of chromium at room temperature is 24 j/k mol and its atomic mass is 52g what is specific heat capacity of chromium?
  
• Object displays from 5 metre height reaches at a ground distance of 10 metre what is the final velocity?
  
• Two strings stretched by 5 cm and 10 cm respectively Ven masses 0.5 kg and 1kg are suspended at the lower abs when display slightly from the mean position and least they will oscillate with time period in the ratio?