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

The work done in vacuum when 300 m mole of an ideal gas expands until its volume is increased by 2.3 dm³ at 1 bar pressure is ______ mole.

The change in internal energy in a reaction when 2kJ of heat is released by the system and 6 kJ of work is done on the system will be ______.

Calculate `"E"_"cell"^0` for galvanic cell with electrodes Co/Co³⁺// Mn²⁺/Mn. 
`"E"_"Mn"^0` = - 1.18 V, `"E"_"Co"^0` = 1.82 V.

Give the chemical composition present in the salt bridge.

What are the functions of a salt bridge in a galvanic cell?

Represent the galvanic cell from following overall cell reaction:

3Ni_(s) + 2Al³⁺ (1 M) → 3Ni²⁺(1 M) + 2Al_(s)

Carboxylic acids have higher boiling points than those of ethers. Give reason.

Calculate standard cell potential of following galvanic cell:

Zn/Zn²⁺(1 M) // Pb²⁺(1 M)/Pb. If `"E"_"Pb"^0` = 0.126 V and `"E"_"Zn"^0` = –0.763 V

Give one example of zero order reaction.

Write the name of the reaction in which aromatic primary amines produce offensive smell.

Write the name of the gas evolved when a primary amine is reacted with nitrous acid.

Write the reactions to bring about the following conversions.

Methyl chloride to Ethanamine

Acidic strength of halogen acids increases in the order of _______.

Write the reactions to bring about the following conversions.

Nitroalkane to Alkylamine

Write the reactions to bring about the following conversions.

Alkyl cyanide to Alkylamine

Write the order of ionic character of halides with monovalent metal (M).

In 3d series, if nuclear charge increases, the shielding effects will ______.

Transition elements have more tendency to form interstitial compounds because _______.

The catalyst used for decomposition of KClO₃ is _______.

Write formula to calculate magnetic moment.