Questions asked by Sana T.

• Back to user's profile
• A compound X contains 50% sulpher and 50% oxygen by mass. what is the empirical ( simplest) formula of the compound X? Options a) SO b) SO2 c)SO3 d) SO4 please please Explain. :(
  
• 3.01e22 Ag+ ions is present in? options a) 85 grams of AgNO3 b) 0.85g AgNO3 c) 8.5g AgNO3 d) 18.5g AgNO3
  
• 2 ships X&Y are traveling in different directions at equal speed. the actual direction of motion of X is due North but to an observer on Y the apparent direction of motion of X is north east. the actual direction of motion of Y as observed from shore is?
  
• The position of 2 bodies at any instant are represented by 2 points A(2,3,4) & b(5,6,7) from origin O. what is the distance between these bodies at that instant?
  
• Subtraction of vector B from vector A, we use the following mathematical relation? a) A-B=A-B b) b) A-B=A+B c) A-B=A+(-B) d) A-B=A-(+B)
  
• If we add the following numbers 72.1 + 3.41 + 0.003 then the answer will be ? A)75.1 b) 75.52 c) 75.53 d) 75.5 please explain.
  
• The total uncertainty in the average value of many measurements can be calculated as?
  
• 10 moles of CH4 at R.T.P would produce what volume of CO2?
  
• What is the mass of H2O obtained when 30g of C2H6 completely reacts with 500 g of O2 (C=12, H=1, O=16)?
  
• What is mass of 2,4,6 trinitroaniline C6H2(NO2)3NH2 (Mr 228), that can be obtained from 10g of aniline, C6H5NH2 ( Mr 93)?
  
• How does the opposite side of sun looks like?
  
• 1 tonne of CuSO4 contains how many kg of copper? (Mr; Cu=63.5, S=32, O=16)
  
• What is the % of carbon in the hydrocarbon, if #2.20 g# of #"CO"_2# is formed by complete combustion of #1.50 g# of a hydrocarbon? ( C= 12, O= 16, H= 1) (#M_r# of hydrocarbon is=60)
  
• A hydrocarbon contain 0.0334 mol of carbon, 0.0668 mol of hydrogen and 0.0167 mol of oxygen. what is the empirical formula of the hydrocarbon.?
  
• Need some help in memorizing Crystal systems, can any body help? :(
  
• Difference between Co-Factors and Co- enzymes?
  
• Does man, animal and plants contain DNA Or RNA or both? please explain?
  
• A bacillus divides every 20 minutes under ideal conditions of food and temperature. After 3 hours what will be the number of bacilli?
  
• The Rod Shaped phage is........?
  
• One mega watt hour is equal to.....?
  
• A shell of mass 5 kg is fired at 60 degree to the horizontal with a speed of 20 m/sec. Neglecting the air resistance, the K.E of Shell in joule is at highest point is?
  
• A Force of 6 N acts horizontally on a stationary mass of 2 kg for 4 sec. The K.E gained in Joule is...?
  
• Which of the following gas has the rate of diffusion 0.88 times that of Phosphine (PH3) ?
  
• The angular displacement covered by hours hand of a clock after one hour will be equal to.......?
  
• Sound waves transmit 2000 J of energy through area of 10m2 in 5 sec, the intensity of sound in watt/m2 is?
  
• Standard heat of formation is not zero for.. a) Na b) Cl2 c) Hg d) Br2 Please explain.?
  
• A capacitor of 10 micro farad stores a charge of 3.5C is set for discharging through a 100 kilo ohm resister, the charge on the capacitor after 1 second will be?
  
• A cone is 9cm high and has vertical angle of 60 then the diameter of it's base is. A) 3√3. B) 6√3. C) 9√3. D)18√3. ?
  
• On the ground the gravitational force,of the satellite is w. What is the gravitational force on the satellite,when at a height R/50. A) 0.96w B) 0.98w C) 1.02w D) 1.04w ....?
  
• A body of mass 10kg is moving with a velocity (6i +8j) at a certain instant. it's K.E will be. A) 250J B) 500J C)100 J D) 1000J ...?