A silver iodide sol has been prepared by adding slight excess of KI solution to AgNO3 solution having the same concentration as that of KI solution. The silver iodide sol particles are
positively charged
negatively charged
neutral
partially positively and partially negatively charged
P4O10 on reacting with water does not form
tetrametaphosphoric acid
phosphorus acid
orthophosphoric acid
pyrophosphoric acid
Chlorine reacts with carbon disulphide in presence of I2 catalyst to form
CHCl3
CHI3
CCl4
C2H5Cl
The electronic configuration of P in H3PO4
1s2 2s2, 2p6, 3s2 3p6
1s2, 2s2, 2p6 3s2
1s2, 2s2 2p6
1s2, 2s2, 2p6,3s2 3p3
The correct order of electron gain enthalpy with negative sign is
S <O <Cl < F
O <S < F < Cl
Cl <F <S <O
F <Cl <O < S
Which gas behaves abnormally when liquified?
Xenon
Krypton
Helium
Argon
C.
Helium
The ease of liquefaction of a gas depends upon the magnitude of the attractive forces present in its atoms or molecules and He being smallest molecules among all the noble gases, the intermolecular forces of attraction in them are negligible.
Weaker are the intermolecular forces, more difficult it is to liquify that gas and lower would be the critical temperature of that gas.
Tc for helium = 5.2 K (the temperature above which it cannot be liquified however high pressure may be applied on the gas).
This is why when natural gas is compressed to about 100 atm and could to 78 K, helium does not liquify while all other gases get liquified. Thus, helium has lowest critical temperature (5.2 K) among all known gases.
Which statement is false for white phosphorus (P4)?
It has six P-P single bonds
It has four P-P single bonds
It has four lone pairs of electrons
It has PPP angle 60°