Q. Select the incorrect statements about brown ring complex $\left[\right.Fe\left(\right.H_{2}O\left(\left.\right)_{5}NO\left]\right.\left(SO\right)_{4}$ ?

NTA AbhyasNTA Abhyas 2020 Report Error

It has iron in $+1$ oxidation state

NO is two electron donor & colour is due to
$d-d$ transition

$sp^{3}d^{2}$ hybridised complex has magnetic
moment $3.87$ B.M.

Its $IUPAC$ name is pentaaquanitrosylium
iron $\left(\right.I\left.\right)$ sulphate

Solution:

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Questions from NTA Abhyas 2020

1. Which reaction is suitable for preparing $\alpha $ -Chloroacetic acid?

2. A mixture of methane and ethene in a molar ratio of $x:y$ has an average molecular mass of $20 u$ . The mean molar mass when they are mixed in the molar ratio of $y:x$ will be -

Some Basic Concepts of Chemistry

3. For a given reaction, energy of activation for forward reaction $E _{ af }$ is $80 kJ mol ^{-1}$ and $\Delta H =-40 kJ mol ^{-1}$. A catalyst lowers $E _{ af }$ to $20 kJ mol ^{-1}$. The ratio of energy of activation for reverse reaction before and after addition of catalyst is:

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4. 3 Faradays of electricity was passed through an aqueous solution of iron (II) bromide. The weight of iron metal (at. wt. = 56) deposited at the cathode (in g) is

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5. Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound E and compound E on further treatment with aqueous KOH yields compound F. Then compound F is

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Chemistry Most Viewed Questions

1. If for a certain reaction $\Delta_{r}H$ is $30\, kJ\, mol^{-1}$ at $450 \,K$, the value of $\Delta_{r}S$ (in $JK^{-1}\, mol^{-1})$ for which the same reaction will be spontaneous at the same temperature is

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2. If $8\,g$ of a non-electrolyte solute is dissolved in $114\, g$ of n-octane to reduce its vapour pressure to $80\%$, the molar mass (in $g \,mol^{-1})$ of the solute is [Given that molar mass of n-octane is $114 \,g\, mol^{-1}]$

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3. An organic compound contains $78 \%$ (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is: [Atomic wt. of $C$ is $12, H$ is $1$]

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4. At standard conditions, if the change in the enthalpy for the following reaction is $-109 \,kJ\, mol^{-1}$ $H_{2(g)}+Br_{2(g)} \to 2HBr_{(g)}$ Given that bond energy of $H_{2}$ and $Br_{2}$ is $435\,KJ\,mol^{-1}$ and $192\,KJ\,mol^{-1}$ , respectively, what is the bond energy (in $KJ \,mol^{-1})$ of $HBr$ ?