CBSE
Multiple Choice QuestionsWhich statement is true for ferrocene?
All Fe-C are of equal length.
C are sp2 hybridized.
It was the first discovered organometallic compound.
All of these
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.
Assertion : F is more electronegative than Cl.
Reason : F has high electron affinity than Cl.
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.
Among third row elements , the IP value :
irregularly changes from left to right across the third row
increases from left to right across the third row
decrease for Na to Ar
remains constant
Assertion : Acetylene on reacting with sodamide gives sodium acetylidc and ammonia.
Reason : sp hybridised carbon atoms.
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.
Largest difference in radii is found in case of the pair
Li, Na
Na, K
K, Rb
Rb, Cs
During estimation of nickel, we prepare nickel dimethylglyoxime, a scarlet red solid. This compound is
ionic
covalent
metallic
non-ionic complex
Mercurous chloride exists in the form of
Hg+
Hg22+
Hg2+
Hg32+
Which of the following is most polarised ?
Kr
He
Ar
Xe
Which has smallest size ?
Na+
Mg2+
Ne
O2-
