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

Draw structures 01 conjugate bases of monochloroacetic acid and dichloroacetic acid. Which one is more stabilized by -I effect?

What is the action of aqueous bromine on aniline?

Write reactio between Cl₂ and water.

Write cell reaction and calculate the potential (EMF) of the cell Zn(s) | Zn²⁺(0.08 M) || Cr³⁺ (0.1 M) Cr(s) at 298 K. 
\[\ce{E^0_{Zn} = - 0.76 V and E^0_Cr = - 0.74 V}\]

Give a valence bond description of the bonding in the high spin complex [MnCl₆]³⁻ Include orbital diagram for the free metal ion and the metal ion in the complex. Indicate which hybrid orbitals the metal ion uses for bonding. Specify the number of unpaired electrons.

Explain any two applications of nanomaterials.

Write any two difficulties of setting SHE (Standard Hydrogen Electrode).

A compound forms a hep structure. Calculate the number of octahedral voids in 0.4 mol. (NA = 6.022 × 10²³).

A compound forms a hep structure. Calculate the number of octahedral voids in 0.4 mol. (N_A = 6.022 × 10²³ )

Derive the relation between freezing point depression and molar mass of solute.

(CH₃)₄NI is an example of ______.

Octahedral complex have ______ hybridisation.

How sodium bicarbonate test is used to distinguish between carboxylic acid and phenol?

Calculate the mass of compound to be dissolved in 75g of benzene to lower its freezing point by 0.48 K. (Given: K_f = 0.512 K kg mol^-1 and molar mass = 256g mol^-1)

Give the limitations of VBT.

A compound forms hexagonal close packed (hcp) structure. What is the number of (i) Octahedral voids, (ii) Tetrahedral voids, (iii) Total voids formed in 0.7 mol of it.

Mention the type of hybridization in [Co(NH₃)₆]³⁺ complex.

What is the action of hydrochloric acid on the following ?

\[\ce{NH3}\]

What is the action of hydrochloric acid on the following ? 

\[\ce{Na2CO3}\]

Write the name of metal nanoparticle used to remove E.coli bacteria from water.