Assertion : H2O2 has higher boiling point than water.
Reason : H2O2 has stronger dipole-dipole interactions than that shown by water.
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 : BeSO4 is soluble in water while BasO4 is not.
Reason : Hydration energy decreases down the group from Be to Ba and lattice energy remains almost constant.
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: Saturated hydrocarbons are chemically less reactive.
Reason : All isomeric paraffins have same parent name.
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 : CN- ion is an ambident nucleophile.
Reason: Nucleophiles are electron rich species.
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: Conductivity of silicon increases by doping it with group-15 elements.
Reason : Doping means introduction of small amount of impurities like P, As or Bi into the pure crystal.
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.
B.
If both assertion and reason are true but reason is not the correct explanation of assertion.
When a silicon crystal is doped with a group-15 element like P, As, Sb or Bi, the silicon atoms at some lattice sites are substituted by atoms ofgroup-15 element. As these atoms have 5 electrons in the valence shell, after forming normal four covalent bonds with silicon atoms, the extra fifth electron is free and gets delocalized and hence, increases the conductivity of silicon.
Copper sulphate is dissolved in water containing ________ for making Bordeaux mixture.
NaOH
KCN
Ca(OH)2
All of these
What happens when chloroform is left open in air in the presence of sunlight?
Explosion takes place
Phosgene, a poisonous gas is formed.
Polymerisation takes place.
No reaction takes place.
The Ca2+ and F- are located in CaF2 crystal respectively at face-centred cubic lattice points and in
tetrahedral voids
half of tetrahedral voids
octahedral voids
half of octahedral voids