Uncertainty in the position of an electron (mass= 9.1 x 10-31 kg) moving with a velocity 300 ms-1 accurate upon 0.001 % will be (h = 6.63 x 10-34 J-s)
19.2 x 10-2 m
5.76 x 10-2 m
1.92 x 10-2 m
3.84 x 10-2 m
An acid solution of pH = 6 is diluted 1000 times, the pH of the final solution becomes
6.01
9
3.5
6.99
When Zn is treated with excess of NaOH, the product obtained is
Zn(OH)2
ZnOH
Na2ZnO2
None of the above
Which of the following compounds do not give different isomers on monochlorination?
Neo-pentane
n-butane
Iso-butane
Iso-pentane
A.
Neo-pentane
Neo-pentane gives only one monochloro derivative due to the presence of only one type of H-atoms.
34.2 g of cane sugar is dissolved in 180 g of water. The relative lowering of vapour pressure will be
0.0099
1.1597
0.840
0.9901
In a multistep reaction, the overall rate of reaction is equal to the
rate of slowest step
rate of fastest step
average rate of various step
the rate of last step
According to Hess's law, the heat of reaction depends upon
initial condition of reactants
initial and final conditions of reactants
intermediate path of the reaction
end conditions of reactants