The correct set of quantum numbers (n, l and m respectively) for the unpaired electron of chlorine atom is :
2, 1, 0
2, 1, 1
3, 1, 1
3, 2, 1
Which of the following contains maximum number of molecules ?
200 cc of NH3 at STP
100 cc of CO2 at STP
150 cc of N2 at STP
500 cc of SO2 at STP
The numerical value of (where, N is the number of molecules in a given sample of gas and n is the number of moles of the gas) is :
8.314
6.02 × 1023
0.0821
1.66 × 10-19
Consider the ions : K+, S2-, Cl- and Ca2+. The radii of these ionic species follow the order
Ca2+ > K+ > Cl- > S2-
Cl- > S2- > K+ > Ca2+
S2- > Cl- > K+ > Ca2+
Ca2+ > S2- > Cl- > Ca2+
Identify the correct statement from below, concerning the structure of CH2 = C = CH2
The molecule is planar
One of the three carbon atoms is in an sp3 hybridized state
The molecule is non-planar with the two -CH2 groups being in planes perpendicular to each other
All the carbon atoms are sp-hybridized
C.
The molecule is non-planar with the two -CH2 groups being in planes perpendicular to each other
The structure, CH2 = C = CH2 is non-planar with the two -CH2 groups being in planes perpendicular to each other.
Molecular shapes of SF4, CF4, XeF4 are :
the same with 2, 0 and 1 lone pair of electron respectively
the same with 1, 1 and 1 lone pair of electrons respectively
different with 0, 1 and 2 lone pair of electrons respectively
different with 1, 0 and 2 lone pair of electrons respectively
The enthalpy change for the transition of liquid water to steam is 40.8 kJ mol-1 at 373 K. What is the entropy of vaporisation of water ?
209.4
109.4
-109.4
-209.4