NEET Practice Questions

Answer:  It decomposes into ferric oxide and ammonia gas.

Explanation: Upon strong heating, Mohr’s Salt decomposes into ferric oxide (Fe₂O₃) (RED), ammonia gas (NH₃), sulfur dioxide (SO₂), and water vapor (H₂O). This decomposition is a chemical change.

\(2 \mathrm{FeSO}_4(s) \xrightarrow[\text { Decomposition }]{\text { Heat }} \mathrm{Fe}_2 \mathrm{O}_3(s)+\mathrm{SO}_2(g)+\mathrm{SO}_3(g)\)

Step: Find the wavelength of the transmitted wave.
The frequency of the wave pulse remains unchanged since it depends only on the source. The wavelength of the transmitted wave is given by;
\(\frac{\lambda_1}{\lambda_2}=\frac{v_2}{v_1}\)
\(\Rightarrow \frac{\lambda_1}{\lambda_2}= \sqrt{\frac{\mu_2}{\mu_1}}~~~~~~~~~~~~\left[v=\sqrt{\frac{T}{\mu}}\right]\)
\(\Rightarrow \frac{\lambda_1}{\lambda_2}=\frac{1}{2}\)
\(\Rightarrow \lambda_2=2\lambda _1=80~\text{cm}\)
Hence, option (2) is the correct answer.
 

Explanation:

Step 1: The compounds that have the same number of and same type of atoms but differ from each other in their spatial arrangement of atoms are the geometrical isomers of each other.

The conditions for geometrical isomers are as follows:

(i) The molecule of the given compound must have a double bond.
(ii) Different atoms or groups of atoms must be attached on each side of the carbon-carbon double bond.

Generally, the compound with YXC = CXY like structure shows geometrical isomerism.

Step 2: The structure of the given compounds is as follows:

Among, the given compounds, only 4-Methylpent-2-ene will show geometrical isomerism. Hence, option 2 is the correct answer.

Explanation: 

The rate constant, or the specific rate constant, is the proportionality constant in the equation that expresses the relationship between the rate of a chemical reaction and the concentrations of the reacting substances.

The rate constant depends only on temperature (and activation energy) and the presence of a catalyst. Whereas the rate of reaction depends on temperature, pressure, time, composition/concentration of reactants, as well as the presence of a catalyst.

So, the correct answer is option 1.

Step: Find the inductance of the combination.
If two or more inductors are connected in series, then the current flowing through them will be the same, but the voltage difference across them will be different. Therefore, the inductance of the combination is \(L_{eff}=L_1+L_2.\)
Hence, option (1) is the correct answer.