Question
Write the equation of trimerization and tetramerization of acetaldehyde.
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Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: $SF_6$ cannot be hydrolysed but $SF_4$ can be.
Reason: Six $F$ atoms in $SF_6$ prevent the attack of $H_2O$ on sulphur atom of $SF_6.$
→Assertion: $SF_6$ cannot be hydrolysed but $SF_4$ can be.
Reason: Six $F$ atoms in $SF_6$ prevent the attack of $H_2O$ on sulphur atom of $SF_6.$
What advantage do the fuel cells have over primary and secondary batteries?
Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL of water at 37°C.
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Ferric oxide crystallises in a hexagonal close-packed array of oxide ions with two out of every three octahedral holes occupied by ferric ions. Derive the formula of the ferric oxide.
Account for the following observation:
Among the halogens, $F_2$ is the strongest oxidising agent.
→Among the halogens, $F_2$ is the strongest oxidising agent.
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Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Copper sulphate can be stored in zinc vessel.
Reason: Zinc is less reactive than copper.
Assertion: Copper sulphate can be stored in zinc vessel.
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Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: For measuring resistance of an ionic solution an $AC$ source is used.
Reason: Concentration of ionic solution will change if $DC$ source is used.
→Assertion: For measuring resistance of an ionic solution an $AC$ source is used.
Reason: Concentration of ionic solution will change if $DC$ source is used.