HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions

The molar conductivity of cation and anion of salt BA are 180 and 220 mhos respectively. The molar conductivity of salt BA at infinite dilution is_____________ .

(a) 90 mhos.cm²                                                                             

(b) 110 mhos.cm².mol^-1

(c) 200 mhos.cm².mol^-1                                                                 

(d) 400 mhos.cm².mol^-1

Sucrose decomposes in acid solution to give glucose and fructose according to the first order rate law. The half life of the reaction is 3 hours. Calculate fraction of sucrose which will remain after 8 hours.

Distinguish between Order and Molecularity of reaction.

Describe the laboratory method of preparation of ammonia

What is the IUPAC name of 

How are propan-1-amine and propan-2-amine prepared from oxime?

Write any ‘two’ uses of terylene.

Write the reactions involved in the preparation of  PVC

What is the covalency of nitrogen in N₂O₅?

Write the IUPAC name of 

The conductivity of 0.20 M solution of KCl at 298 K is 0.025 S cm⁻¹. Calculate its molar conductivity.

Write the IUPAC names of the following coordination compounds: [Cr(NH₃)₃Cl₃]

For a first order reaction, show that time required for 99% completion is twice the time required for the completion of 90% of reaction.

 A first order reaction takes 40 minutes for 30% decomposition. Calculate t_1/2 for this reaction. (Given log 1.428 = 0.1548)

State Kohlrausch Law.

What is the action of Excess of air on ammonia ?

which of the following carbocations is least stable?

(A) 

(B)

(C)

(D)

Inflammation of the tongue is due to the deficiency of:

Identify the compound 'B' in the following series of reaction:

(A) n-propyl chloride

(B) Propanamine

(C) n-propyl alcohol

(D) Isoproply alcohol

Which of the following reagents is best for the following conversion?

(A) LiAlH₄

(B) 

(C) H₂/Ni, 453 K

(D) Zn-Hg+HCl_(con)