Chemistry - Online Test
Q1. When sodium peroxide is treated with dilute sulphuric acid, we get ______.
Answer : Option C
Explaination / Solution:
Hydrogen peraoxide is also prepared by the reaction of acid sodium peroxides. Reaction is as follow :
Q2. K3CoF6 is high spin complex. What is the hybrid state of Co atom in this complex?
Answer : Option B
Explaination / Solution:
CN is 6 so octahedral complex with hybridization sp3d2 .
Q3. Some of the detergents are non – biodegradable because
Answer : Option D
Explaination / Solution:
The branched carbon chain is difficult to degrade.
Q4. A strong base can abstract an α – hydrogen from
Answer : Option A
Explaination / Solution:
Because conjugate base that form will be stable in case of Ketone.
Q5. The highest electrical conductivity of the following aqueous solutions is of
Answer : Option C
Explaination / Solution:
Acidity increases on attaching electron withdrawing group because of stability of conjugate base.
Q6. The state of a gas can be described by quoting the relationship between
Answer : Option C
Explaination / Solution:
State of gas is determined by stating the value of P,V,n,T
Q7. In acetylene molecule, between the carbon atoms there are
Answer : Option D
Explaination / Solution:
acetylene is C2H2.
C atoms are bound with triple bond i.e. 1 sigma and 2 pie bonds.
Q8. A dibromo derivative of an alkane reacts with sodium metal to form an alicyclic hydrocarbon. The derivative is ______.
Answer : Option B
Explaination / Solution:
Intramolecular wurtz leading to cyclisaion.
Q9. Alkali metals react with water vigorously to form hydroxides and dihydrogen.Which of the following alkali metals reacts with water least vigorously?
Answer : Option C
Explaination / Solution:
Li reacts with water least vigorously, since the density of Li is only about half that of water,so it floats on the surface and ultimately dissappears,giving off H2 gas
Q10. Delocalisation of σ electrons of C -H bond of an alkyl group directly attached to an atom of unsaturated system or to an atom with an unshared p orbital is called:
Answer : Option B
Explaination / Solution:
Delocalisation of σ electrons of C -H bond of an alkyl group directly attached to an atom of unsaturated system or to an atom with an unshared p orbital is known as Hyperconjugation
