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

What is a cell constant? What are its units? How is it determined experimentally?

Answer the following in one or two sentences.

Write the relationship between conductivity and molar conductivity and hence unit of molar conductivity.

Answer the following in brief.

Explain the effect of dilution of the solution on conductivity.

Answer the following:

What is Kohlrausch law of independent migration of ions? How is it useful in obtaining molar conductivity at zero concentration of a weak electrolyte? Explain with an example.

Answer the following.

The first ionization enthalpies of S, Cl, and Ar are 1000, 1256 and 1520 kJ/mol^-1, respectively. Explain the observed trend.

Explain the trend in following atomic properties of group 16 elements:

Atomic radii

Answer the following.

Explain the trend in following atomic properties of group 16 elements:

Ionisation enthalpy

Explain the trend in following atomic properties of group 16 elements:

Electronegativity

Choose the most correct option.

Electronic configuration of Cu and Cu¹⁺ are _______.

Choose the most correct option.

Which of the following have d⁰s⁰ configuration?

Choose the most correct option.

In which of the following series all the elements are radioactive in nature?

Answer the following

Write the probable electronic configuration of chromium and copper.

Choose the most correct option.

The oxidation state of cobalt ion in the complex [Co(NH₃)₅ Br]SO₄ is __________.

Answer the following in one or two sentences.

What is the shape of a complex in which the coordination number of the central metal ion is 4?

Write the structure and IUPAC name of the major product in the following reaction.

\[\begin{array}{cc}
\ce{CH3 - CH - CH2Cl + NaI ->[Acetone]}\\
|\phantom{..................}\\
\ce{CH3\phantom{...............}}
\end{array}\]

Write the structure and IUPAC name of the major product in the following reaction.

\[\ce{CH3 - CH2Br + SbF3 ->}\]

Write the structure and IUPAC name of the major product in the following reaction.

\[\begin{array}{cc}
\ce{CH3 - CH - CH = CH2 + HBr ->[peroxide]}\\
|\phantom{........................}\\
\ce{CH3\phantom{.....................}}
\end{array}\]

Write the structure and IUPAC name of the major product in the following reaction.

Write the structure and IUPAC name of the major product in the following reaction.

Give reason:

Alkyl halides are generally not prepared by free radical halogenation of alkanes.