Catalytic Hydrogenation

Q.

The oxidation number of $\text{Cr}$ in ${\mathrm{CrO}}_5$ is_______.

Q.

What color is Copper Oxide?

Q.

Predict all the alkenes that would be formed by dehydrohalogenation of the following halides with sodium ethoxide in ethanol and identify the major alkene:

(i) 1-Bromo-1-methylcyclohexane

(ii) 2-Chloro-2-methylbutane

(iii) 2, 2, 3-Trimethyl-3-bromopentane.

Q. Which of the following does not give oxygen on heating?

1. $K_{2}C{r}_2{O}_7$
2. $(N{H}_4{)}_{2}C{r}_2{O}_7$
3. $KCl{O}_3$
4. $Zn(Cl{O}_3{)}_2$

Q.

Why fluoroarenes cannot be prepared by direct reaction of flourine with benzene.

Q. what is ment be " hydroformylation of olefins yields aldehydes which further undergo reduction to give alcohol "?

Q. The stereoisomers that are formed by electrophilic addition of bromine to tans-but-$2$-ene is/are :

1. $2$ enantiomers
2. $1$ racemic and $2$ enantiomers
3. $2$ enantiomers and $2$ mesomers
4. $2$ identical mesomers

Q.

CH₃COCl + H₂ in presence of Pd and BaSO₄ the product is -

Q. (a) Account for the following:
(i) Mn shows the highest oxidation state of +7 with oxygen but with fluorine it shows the highest oxidation state of +4.
(ii) Zirconium and Hafnium exhibit similar properties.
(iii) Transition metals act as catalysts.
(b) Complete the following equations:

$\begin{array}{ccccccc}\left(i\right)& 2Mn{O}_2& +& 4KOH& +& O_2& \underset{}{\overset{△}{\to }}\\ \left(ii\right)& C{r}_2{O}_7^{2-}& +& 14H^{+}& +& 6I^{-}& \underset{}{\overset{}{\to }}\end{array}$

Q.

Which of the following cannot be prepared by Kolbes electrolysis process?

1. Methane

2. Ethyne

3. Ethane

4. None of these

Q. Write a balanced equation for the reaction of $PC{l}_5$ in heavy water.

Q. Which of the following reaction is also known as sabatier and senderens reaction?

1. Soda lime reaction
2. Kolbe's electrolysis
3. Catalytic hydrogenation by using finely divided nickel
4. Wurtz reaction

Q. Arrange the following in the increasing order of their heat of hydrogenation:

1. $P<Q<R<S$
2. $S<R<P<Q$
3. $S<R<Q<P$
4. $P<Q<S<R$

Q. Anti-Markovnikov addition is not observed in:

1. Propene
2. But-1-ene
3. But-2-ene
4. Pent-2-ene

Q.

State a reaction in which SO₂ acts as an oxidizing agent.

Q.

Write the balanced chemical equation for the preparation of Methane from sodium acetate

Q. When 2ethyl3methyl1pentene is treated with CH3OH in H2SO4 How many different methoxy ether would be formed in significant amount

Q.

Give the balanced chemical equation for the reaction in which; Carbon dioxide (${\mathrm{CO}}_2$) dissolves in water(${\mathrm{H}}_2\mathrm{O}$) to form carbonic acid(${\mathrm{H}}_2{\mathrm{CO}}_3$).

Q.

What happens when (give balanced chemical equation and write the names of the reactants and products in each case):

Ethyne and hydrogen combine in the presence of a catalyst.

Q. Hydrocarbon containing following bond is most reactive

1. 
2. 
3. 
4. 

Q. Sulphur has highest oxidation state in

1. 
2. 
3. 
4. 

Q.

Methane , alkenes& alkynes do not give conformational isomers why?

Q. Propane is obtained from propene, by which of the following methods

1. Frankland reaction
2. Wurtz reaction
3. Catalytic hydrogenation
4. Dehydrogenation

Q. In the following reaction,

The structure of the major product X is:

1. 
2. 
3. 
4. 

Q. Reaction between trimethylacetaldehyde and formaldehyde in presence of $conc.NaOH$ is known as:

1. Cannizzaro's reaction
2. Cross Cannizzaro's reaction
3. Mixed Aldol condensation
4. Aldol condensation

Q.

Alkanes are prepared by the following methods
I) Decarboxylation of salts of fatty acids
II) Wurtz reaction

III) Kolbe's electrolysis
IV) Sabatier - Senderen's reaction

V) Reduction of alkyl halides

In which of these methods, a sigma bond is formed between carbon atoms

1. All

2. Only II, III, IV

3. Only II, III

4. Only I, IV, V

Q. The compounds that will give an isomer of 2, 2-dimethyl propane on catalytic hydrogenation are

1. 1 and 4
2. 2 and 4
3. 1 and 3
4. 1 and 2

Q. Which is the correct order for rate of hydrogenation?

1. Hept-1-ene < Hept-3-ene < 2-Methylhex-2-ene
2. 3-Ethyloct-1-ene < 2-Ethyloct-1-ene < Oct-2-ene
3. Ethene < ethyne
4. 3-Methylcyclooctene < 1 - Methylcyclooctene < 1, 2-Dimethylcyclooctene

Q.

This is not an alloy of copper-

(A) Brass

(B) Bronze

(C) Solder

(D) Duralumin

1. (A) Brass

2. (B) Bronze

3. (C) Solder

4. (D) Duralumin

Q. Benzene be dissolved in $CC{l}_4$ ?

1. can
2. can not
3. may