JEE Chemistry Important Questions: Which branch chain isomer of the hydrocarbon with molecular mas 72u gives only one isomer of monosubstituted alkyl halide?
Ans. Neopentane with Cl2 and monohalogenation gives a single product.
As the molecular mass indicates it should be pentane and neopentane can only form one mono substituted alkyl halide as all the hydrogens are equivalent in neopentane.
JEE Chemistry Important Questions: Which element have a great difference between its first and second ionization energies?
Ans. K=2,8,8,1
After the removal of one electron, the second electron we have to remove from another shell that has an octet configuration, hence there is a large difference between first and second ionization energies.
JEE Chemistry Important Questions: Which region of the atmosphere can form clouds and where we can live respectively?
Ans. The troposphere is the lowest region of the atmosphere bounded by Earth beneath and the stratosphere above where most of the clouds form and where life form exists.
JEE Chemistry Important Questions: What is wrong with respect to our responsibility as human beings to protect our environment?
Ans. Using plastic bags is wrong with respect to our responsibility as human beings to protect our environment because plastic bags pollute our land and water.
JEE Chemistry Important Questions Assertion: The O-O the bond length in H2O is shorter than that of O2F2.
Reason: H2O2 is an ionic compound.
Ans. H2O2is a covalent compound. In O2F2, O−O bond is shorter than in H2O2
due to the higher electronegativity of F.
