HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

Write oxidation number of iron in [Fe(CO)₅]

Write four postulates of Werner’s theory.

Distinguish between double salt and coordination complex.

Define Anionic sphere complex.

Define coordination number.

Aromatic electrophilic substitution with iodine can be carried out using _____________

Name the reagent used to convert alkyl halide to ester.

A compound is made up of two elements X and Y and crystallizes in bcc structure. Atoms of X are present at the corners of the cube. Atoms of Y are present at the centre of the cube. The formula of the compound is ______.

Sodium crystallizes in bcc structure. If the edge length of unit cell is 4.3 × 10^-8 cm, the radius of Na atom is ______.

Give reason. Though alkyl halides are moderately polar, they are insoluble in water.

Classify the following solid:

Pb

A compound crystallizes in bcc structure. What is unit cell edge length if diameter of its atom is 120 pm?

What is Grignard reagent? How is it prepared? Why are they prepared under anhydrous condition?

Predict all the alkenes that would be formed by dehydrohalogenation of the following alkyl halide.

1. 2-chloro-2-methylbutane
2. 3-bromo-2,2,3-trimethylpentane

In a carbinol system of nomenclature tert.butyl alcohol is named as _______________

For a reaction \[\ce{HCl_{(aq)} + H2O_{(l)} ⇌ H3O^+_{ (aq)} + Cl^-_{ (aq)}}\]

Which of the following is a conjugate acid-base pair?

The theory which explain amphoteric nature of water is ______.

Label the one conjugate acid-base pair in the following reaction.

\[\ce{CO^{2-}_{3(aq)} + H2O_{(l)} ⇌ OH^- + HCO^-_3}\]

Classify the following species into Lewis acids and Lewis bases.

Explain the amphoteric nature of water.