A better reagent to convert primary alcohol to aldehyde is _________.
- Achromic anhydride
- ✓pyridinium chlorochromate
- Cpotassium permanganate
- Dpotassium dichromate
Answer: B.
View full solution →Question types
REPEATER 2024 question types
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47
Questions
5
Question groups
5
Question types
01
MCQ
10 Q→02Answer the following in one or two sentence.
12 Q→03Answer the following in brief.
12 Q→04Answer the following in detail.
5 Q→05Answer the following questions:
8 Q→Sample Questions
REPEATER 2024 questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
The reaction used to convert toluene to benzaldehyde is known as :
- ✓Etard's reaction
- BGatterman-Koch formylation reaction
- CFriedel-Crafts reaction
- DSwartz reaction
Answer: A.
View full solution →Neutral complex in the following is _________.
- ✓$\left[ Co \left( NO _2\right)_3\left( NH _3\right)_3\right]$
- B$\left[ Co \left( NH _3\right)_5 CO _3\right] Cl$
- C$Na _3\left[ Co \left( NO _2\right)_6\right]$
- D$\left[ Co \left( C _2 O _4\right)_3\right]^{3-}$
Answer: A.
View full solution →Among the following benzylic halide is _________.
- A
- ✓
- C
- D
Answer: B.
View full solution →Which of the following $\propto$-amino acids do not contain chiral centre?
- Aalanine
- Bvaline
- Cleucine
- ✓glycine
Answer: D.
View full solution →Write the reaction when ethylamine is treated with :
(a) excess of ethyl bromide $\quad$ (b) Hinsberg's reagent
View full solution →(a) excess of ethyl bromide $\quad$ (b) Hinsberg's reagent
What is the denaturation of proteins? Write the name of only pyrimidine base in RNA.
Write salient features of $S N^1$ mechanism.
View full solution →Define :
(a) Pyrometallurgy $\quad$ (b) Roasting
View full solution →(a) Pyrometallurgy $\quad$ (b) Roasting
Write the preparation of Nylon-6 polymer and its two uses.
Identify $'A\ ', 'B\ '$ and $'C\ '$ in following chain reaction and rewrite the chemical reactions :
$H_3 C-CH_2 Cl+KOH_{(a q)} \xrightarrow{\Delta}{ }^{\prime} A^{\prime} \xrightarrow[\text { powder }]{\text { hot } Cu}{ }^{\prime} B^{\prime} \xrightarrow[\text { dil. } H_2 SO_4]{K_2 Cr_2 O_7}{ }^{\prime} C^{\prime}$
View full solution →$H_3 C-CH_2 Cl+KOH_{(a q)} \xrightarrow{\Delta}{ }^{\prime} A^{\prime} \xrightarrow[\text { powder }]{\text { hot } Cu}{ }^{\prime} B^{\prime} \xrightarrow[\text { dil. } H_2 SO_4]{K_2 Cr_2 O_7}{ }^{\prime} C^{\prime}$
Write Clemmenson's reduction reaction of propanone. Write Fehling solution test for ethanal.
Explain optical isomerism in 2-chlorobutane.
Explain Cross Cannizzaro reaction. Draw structure of Zwitter ion of sulfanilic acid.
Explain anomalous behaviour of oxygen with respect to atomicity, magnetic property and oxidation state.
Explain the formation of $\left[ Co \left( NH _3\right)_6\right]^{3+}$ ion on the basis of Valence bond theory.
Convert the following:
(a) acetic acid to ethyl acetate
(b) acetic acid to ethyl alcohol
View full solution →Convert the following:
(a) acetic acid to ethyl acetate
(b) acetic acid to ethyl alcohol
When gold crystallizes, it forms face-centred cubic cell. The unit cell edge length is 408 pm .
Calculate the density of gold. [Molar mass of gold $=197 g \ mole ^{-1}$ ]
Which flower is an example of self cleaning?
Write the monomer used for preparation of PVC.
View full solution →Calculate the density of gold. [Molar mass of gold $=197 g \ mole ^{-1}$ ]
Which flower is an example of self cleaning?
Write the monomer used for preparation of PVC.
Distinguish between order and molecularity of a reaction.
Write gases liberated at cathode and anode during electrolysis of aqueous NaCl solution.
Write two uses of neon.
Write gases liberated at cathode and anode during electrolysis of aqueous NaCl solution.
Write two uses of neon.
Define:
(a) Standard enthalpy of combustion.
(b) Enthalpy of atomization.
Draw the structure of D-ribose sugar.
Write the uses of bronze alloy.
(a) Standard enthalpy of combustion.
(b) Enthalpy of atomization.
Draw the structure of D-ribose sugar.
Write the uses of bronze alloy.
How is dioxygen prepared in laboratory from $KCIO _3$ ? Write the chemical reaction to convert :
(a) phenol to benzoquinone
(b) phenol to cyclohexanol
View full solution →(a) phenol to benzoquinone
(b) phenol to cyclohexanol
Write the relation between van't Hoff factor and degree of dissociation of an electrolyte.
Write the condition for spontaneity of reaction with respect to entropy.
Write the IUPAC name of amine formed when acetamide undergoes Hofmann bromamide degradation.
Write the electronic configuration of $Zn ^{2+}$ ion. (Atomic number of zinc is 30).
View full solution →Write the IUPAC name of $Na _3\left[A L F_6\right]$.
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