HSC Science (Electronics) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Chemistry

Which of the followings is a trihydric alcohol ?

(a) n-propyl alcohol

(b) Glycerol                         

(c)  Glycol                       

(d) Glycine

Alkyl halides are -

(a) Mono halogen derivatives of alkanes 

(b) Di halogen derivatives of alkanes

(c) Tri halogen derivatives of alkanes

(d) Tetra halogen derivatives of alkanes

Alkyl halides are -

(a) Mono halogen derivatives of alkanes 

(b) Di halogen derivatives of alkanes

(c) Tri halogen derivatives of alkanes

(d) Tetra halogen derivatives of alkanes

Write the structures of - 3-chloro-3-ethylhex-1-ene

Write the structures of - 3-chloro-3-ethylhex-1-ene

Explain the term Antiseptics

Write ‘four’ characteristics of co-ordinate complex ion.

Write ‘four’ physical methods of preserving food materials

Draw structure of Chlorine pentafluoride

Write the structure of a nucleotide

What are three types of RNA molecules which perform different functions?

a. Explain the trends in the following properties with reference to group 16:

1 Atomic radii and ionic radii

2 Density

3 ionisation enthalpy

4 Electronegativity

b. In the electolysis of AgNO₃ solution 0.7g of Ag is deposited after a certain period of time. Calulate the quantity of electricity required in coulomb. (Molar mass of Ag is 107.9g mol^-1)

Derive a relation between ΔH and ΔU for a chemical reaction. Draw neat labelled diagram of calomel electrode. Resistance and conductivity of a cell containing 0.001 M KCI solution at 298K are 1500Ω and 1.46x10^-4 S.cm^-1 respectively.

The rate of reaction for certain reaction is expressed as:

`1/3(d[A])/dt=-1/2(d[B])/dt=-(d[C])/dt`

 The reaction is ______.

What is a soap ?

What happens if external potential applied becomes greater than E°cell of electrochemical cell?

Write two differences between an ideal solution and a non-ideal solution.

Explain trem Analgesics.

Write the structures of -1-Iodo-2, 3-dimethylbutane

Write the structures of -1-Iodo-2, 3-dimethylbutane