Hydrofluoric acid is a weak acid. At 25°C, the molar conductivity of 0.002 M HF is 176.2 cm2 mol-1. If its = 405.2 cm2 mol-1. Equilibrium constant at the given concentration is
6.7 10-4 M
3.2 10-4 M
6.7 10-5 M
3.2 10-5 M
A.
6.7 10-4 M
Incorrect statement about Ge is
GeO2 is weakly acidic
Ge(OH)2 is amphoteric
GeCl2 is more stable than GeCl4
Ge-Ge bond energy is lesser than that of Si - Si.
In an isobaric process, when temperature changes from T1 to T2 ,S is equal to
2.303 Cp log (T2/T1)
2.303 Cp ln (T2/T1)
Cp ln (T1/T2)
Cv ln (T2/T1)
Assertion : Heat of neutralisation of nitric acid with NaOH is same to that of HCI and NaOH.
Reason : In both cases strong acid and strong bases are neutralised.
H+ + OH- H2O
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
Assertion : A reaction which is spontaneous and accompanied by decrease of randomness must be exothermic.
Reason : All exothermic reactions are accompanied by decrease of randomness.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion: The S-S-S bond angle in S8 molecule is 105°.
Reason : S8 has a V-shape.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Sodium formate has both the C-O bonds have same value 1.27Å.
Reason : Equal bond length is due to the phenomenon of resonance.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Ice water, if pressure is applied water will evaporate.
Reason : Increases of pressure pushes the equilibrium towards the side in which number of gaseous molecule increases.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : In an acid-base titration involving strong base and a weak acid, methyl orange can be used as an indicator.
Reason : Methyl orange changes its colour in pH range of 7 to 9.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Which of the following shows bond in silicone?
Si-C-Si-C-Si
Si-Si-Si-Si
-Si-O-Si-O-Si-
Si-C-Si-O-Si