Reaction with Metals

Q. The major product formed in dehydrohalogenation reaction of 2-Bromopentane is Pent-2-ene. This product formation is based on?

1. Huckel's Rule
2. Saytzeff's Rule
3. Hund's Rule
4. Hofmann Rule

Q.

Primary alkyl halide C₄H₉Br (a) reacted with alcoholic KOH to give compound (b).Compound (b) is reacted with HBr to give (c) which is an isomer of (a). When (a) is reacted with sodium metal it gives compound (d), C₈H₁₈ which is different from the compound formed when n-butyl bromide is reacted with sodium. Give the structural formula of (a) and write the equations for all the reactions.

Q.

If Nacl is doped with 10^ -3 mol % srcl2 , what is the concentration of cation vacancies?

Q.

Explain isomerism in coordination compounds with examples?

Q.

What happens when chlorine reacts in slaked lime?

Q. When vapours of a secondary alcohol is passed over heated copper at $573K$, the product formed is:

1. A carboxylic acid
2. An aldehyde
3. A ketone
4. An alkene

Q.

Define homo atomic and hetero atomic molecules?

Q. how to calculate coordinatation number in s.c , f.c.c and b.c.c

Q.

Is hydrogen a solid, liquid, or gas at room temperature?

Q.

(CH₃)₃CMgCl on reaction with D₂O produces :

1. (CH₃)₃OD

2. (CH₃)₃CD

3. (CD₃)₃OD

4. (CD₃)₃CD

Q.

What is the color of lead iodide?

Q.

The bleaching properties of ${\mathrm{H}}_2{\mathrm{O}}_2$ are due to its?

1. Acidic nature

2. Basic nature

3. Oxidising nature

4. Reducing nature

Q.

Why oxygen is called gas?

Q. For the following reaction:
$xA\to yB$
${\log }_{10}[-\frac{d\left[A\right]}{dt}]={\log }_{10}\left[\frac{d\left[B\right]}{dt}\right]+{\log }_{10}\left(3\right)$
Here $x,y$ are the stoichiometric coefficients of reactant A and product B respectively.
Negative sign indicates rate of disappearance of the reactant.
Calculate the value of $x:y$

1. $3:1$
2. $1:3$
3. $1:1$
4. $2:1$

Q. Ethylene di bromide on heating with metallic sodium in ether solution yields

1. Ethene
2. Ethyne
3. 2-butene
4. 1-butene

Q. Intermolecular hydrogen bonding is strongest in

1. Methylamine
2. Phenol
3. Methanol
4. Formaldehyde

Q.

Complete the following reaction:

$\mathrm{Fe}+{\mathrm{Cl}}_2\stackrel{}{\to }----$

Q.

An iron nail is kept in each of the following liquids. In which case would it lose its shine and appear dull?

1. Mustard oil

2. Soft drink

3. Coconut oil

4. Kerosene

Q.

What are the properties of Dihydrogen?

Q.

Which of the following hydride is least stable?

1. SnH₄

2. PbH₄

3. GeH₄

4. CH₄

Q.

${\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3+{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{CH}}_3-{\mathrm{CH}}^{+}-{\mathrm{CH}}_2-{\mathrm{CH}}_3\to$Major product. Identify the major product formed in the following reactions.

1. ${\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3$

2. ${\mathrm{CH}}_3-{\mathrm{CH}}_2=\mathrm{CH}-{\mathrm{CH}}_3$

3. ${\mathrm{CH}}_3-{\mathrm{CH}}_3=\mathrm{CH}-{\mathrm{CH}}_3$

4. ${\mathrm{CH}}_3-\underset{\underset{{\mathrm{OSO}}_3\mathrm{H}}{|}}{\mathrm{CH}}={\mathrm{CH}}_2-{\mathrm{CH}}_3$

Q. Using the provided information in the following paper chromatogram:
The $R_f$ value of $A$ is ______ $\times {10}^{-1}$.

Q. why ccl3cho does not give cannizaro reaction?

Q. A mixture of two organic chlorine compounds was treated with sodium metal in ether solution. Isobutane was obtained as a product. The two chlorine compounds are

1. Methyl chloride and propyl chloride
2. Isopropyl chloride and methyl chloride
3. Methyl chloride and ethyl chloride
4. Isopropyl chloride and ethyl chloride

Q.

Name one ore of Iron and write its chemical formula?

Q. $H_{2}S{O}_4$ cannot be used to prepare HBr from NaBr as it:

1. Disproportionate HBr
2. Reacts slowly with NaBr
3. Reduces HBr
4. Oxidises HBr

Q. 1 mol of iron(fe) reacts completely with 0.65 mol o2 to give a mixture of only feo and fe2o3 .mole ratio of ferrous oxide to ferric oxide is :

Q.

Which among the following is a colorless paramagnetic gas?

1. Nitric oxide

2. Nitrous oxide

3. Nitrogen oxide

4. Dinitrogen trioxide

Q. Propan-2-one on reaction with ethyl magnesium bromide followed by hydrolysis gives:
[0.77 Mark]

1. 2-Methylpentan-3-ol
2. Hexan-2-ol
3. 2-Methylbutan-2-ol
4. Butan-2-ol

Q. Sodium nitroprusside when added to an alkaline solution of sulphide ions produces a colouration which is: