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20. When a vibrating turning fork is placed on a sonometer, a large sound is heard. This is dueto(a) Forced vibration(b) Reflection of sound(c) Beats(d) Resonance
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92U238 decays successively to form 90Th234, 91Pa234, 92U234, 90Th230 and 88Ra226then during the reaction the number of particles emitted is
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Answer given is 1. But won't HIO4 oxidise 1 to give 3?
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| | A gas is said to behave like an ideal gas when the relation  = constant. When do you expect a real gas to behave like an ideal gas |
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| | 0.2 mol of HCl and 0.1 mol of barium chloride were dissolved in water to produce a 500 mL. solution. The molarity of the Cl- is |
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| | The net force F acting on a body versus distance traversed by a body is plotted in the figure. The mass of the body is 25kg and its initial speed is 2m/s. Kinetic energy of the body at 5m distance is
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Can't Na+ react with H2O to give NaOH?
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Which of the following is used in our body as a fuel for muscles and nerves and to build and repair body tissues: a) Cane sugar
b) Fructose
c) Proteins
d) Glucose
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An aqueous solution of sodium carbonate has a pH greater than 7 because:
a) It contains more carbonate ions than H2O molecules b) contains more sodium ions than carbonate ions c) Na+ ions react with water d) Carbonate ions react with H2O
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Keep studying them. And try to byheart them.Revise them as often as you can. And always study in a positive mood =)You can try and look into the mechanisms for better understanding too
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If we put it in a container, the pressure will changeTherefore by using PV = nRT we will get the new pressure of the gas (since volume will be volume of the container)In vacuum, P=0, so V will be infinity.We say 1 mole occupies 22.4 litres at NTP (here Temperature and Pressure is specified and are constants at NTP) So, we can calculate Volume easily using PV = nRTI hope that helped =)
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| | The volume of 10 vol. H2O2 required to liberate 500 cm3 of O2 at STP is | | |
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Sec means secondary, it will have a secondary carbon atom.iso groups will have a carbon on the second last carbon of the chain.
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If nitrogen used p orbitals for bonding, how would you expect the dipole moments of ammonia and nitrogen trifluoride to compare?
Also, are Van Der Waals forces just momentary induced dipole forces caused by non polar molecules?
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that's just the definition... how does it explain anything :S
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Why is high temperature favourable for chemisorption but not so for physisorption?
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I think it is done this way
sin^-1(cosx)
=sin^-1(sin(pi/2 - x))
=pi/2 -x
nw integrating this, we get
x*pi/2 - x^2 /2 + c
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First 2 are correct
I think 3rd is correct as well.
Thanks!
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