Gabriel synthesis is used for the preparation of:
- AQuaternary salt
- ✓Primary amines
- CTertiary amine
- DSecondary amine
Answer: B.
View full solution →Question types
MODEL PAPER 4 question types
37 questions across 6 question groups — pick any mix to generate a Chemistry paper with step-by-step answer keys.
37
Questions
6
Question groups
5
Question types
01
M.C.Q (1 Marks)
12 Q→02Assertion (A) & Reason (B) MCQ
4 Q→032 Marks Questions
6 Q→043 Marks Question
8 Q→055 Marks Questions
5 Q→064 Marks Questions
2 Q→Sample Questions
MODEL PAPER 4 questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
When diethyl ether is heated with excess of HI, it produces :
- ✓ethyl iodide
- Bethanol
- Cmethyl iodide
- Diodoform
Answer: A.
View full solution →Which of the following does not give silver mirror test?
- A$CH_3CH_2CHO$
- B$HCOOH$
- C$CH_3CHO$
- ✓$CH_3COCH_3$
Answer: D.
View full solution →The half$-$life of a reaction is halved as the initial concentration of the reactant is doubled. The order of the reaction is$:$
- A$1$
- B$0$
- ✓$2$
- D$3$
Answer: C.
View full solution →Which one among the following metals of 3d series has the lowest melting point?
- ACu
- BFe
- ✓Zn
- DMn
Answer: C.
View full solution →Assertion $(A):$ Aqueous solution of phenol is called as carbonic acid.
Reason $(R):$ Increasing order of acidity of phenols is m nitrophenol $ > o-$nitrophenol $ > p-$nitrophenol.
Reason $(R):$ Increasing order of acidity of phenols is m nitrophenol $ > o-$nitrophenol $ > p-$nitrophenol.
- ABoth $A$ and $R$ are true and $R$ is the correct explanation of $A.$
- BBoth $A$ and $R$ are true but $R$ is not the correct explanation of $A.$
- C$A$ is true but $R$ is false.
- ✓Both $A$ and $R$ are false.
Answer: D.
View full solution →Assertion $(A):$ Isopropyl chloride is less reactive than $\ce{CH_3Br}$ in $S_N2$ reactions.
Reason $(R): SN^2$ reactions are always accompanied by inversion of configuration.
Reason $(R): SN^2$ reactions are always accompanied by inversion of configuration.
- ✓Both $A$ and $R$ are true and $R$ is the correct explanation of $A$.
- BBoth $A$ and $R$ are true but $R$ is not the correct explanation of $A$.
- C$A$ is true but $R$ is false.
- D$A$ is false but $R$ is true.
Answer: A.
View full solution →Assertion $(A):$ Rate of addition of $\ce{HCN}$ on carbonyl compounds increases in presence of $\ce{NaCN}.$
Reason $(R):$ Reaction involves the addition of $Cn$ in rate determining step.
Reason $(R):$ Reaction involves the addition of $Cn$ in rate determining step.
- ✓Both $A$ and $R$ are true and $R$ is the correct explanation of $A.$
- BBoth $A$ and $R$ are true but $R$ is not the correct explanation of $A.$
- C$A$ is true but $R$ is false.
- D$A$ is false but $R$ is true.
Answer: A.
View full solution →Assertion (A): Glucose and fructose are reducing sugars.
Reason (R): Glucose and fructose contain a free aldehydic and ketonic group adjacent to a >CHOH group respectively
Reason (R): Glucose and fructose contain a free aldehydic and ketonic group adjacent to a >CHOH group respectively
- ✓Both A and R are true and R is the correct explanation of A.
- BBoth A and R are true but R is not the correct explanation of A.
- CA is true but R is false.
- DA is false but R is true.
Answer: A.
View full solution →An organic compound $'A \ ' ($molecular formula $C_3H_6O)$ is resistant to oxidation but forms a compound $'B \ ' (C_3H_8O)$ on reduction.$ 'B \ '$ reacts with $HBr$ to form a bromide $'C \ '$ which on treatment with alcoholic $KOH$ forms an alkene $'D \ ' (C_3H_6).$ Deduce the structures of $A, B, C$ and $D.$
View full solution →Define the terms Mass percentage.
Calculate the temperature at which the solution containing $54 g$ of glucose, $C_6H_{12}O_6$ in $250 g$ of water will freeze. $(K_b$ for water $= 1.86 \ K \ kg mol^{-1})$
View full solution →Answer the following:
$(a) a.$ Write the mathematical relation between rate constant and half-life of a first order reaction.
$b.$ What is collision frequency?
$(b)$ If the rate equation is given below:
Rate $= k[A]^2[B]$
then what will be the unit of its rate and rate constant?
View full solution →$(a) a.$ Write the mathematical relation between rate constant and half-life of a first order reaction.
$b.$ What is collision frequency?
$(b)$ If the rate equation is given below:
Rate $= k[A]^2[B]$
then what will be the unit of its rate and rate constant?
Why are $Fe^{2+}$ compounds easily oxidises to $Fe^{3+}$ as compared to $Mn^{+2}$ compounds.
View full solution →State Kohlrausch's law of independent migration of ions. How can the degree of dissociation of acetic acid in a solution be calculated from its molar conductivity data?
Draw the structures of major monohalo products in each of the following reactions:
(1)
(2)
(3)
(1)
(2)
(3)
Calculate the emf of the following cell:
$ Mg ( s )\left| Mg ^{2+}(0.2 M ) \| Ag ^{+}\left(1 \times 10^{-3} M \right)\right| Ag ( s )$
$E ^0\left( Ag ^{+} / Ag \right)=0.80 V$
$E ^0\left( Mg ^{2+} / Mg \right)=-2.37 V$
View full solution →$ Mg ( s )\left| Mg ^{2+}(0.2 M ) \| Ag ^{+}\left(1 \times 10^{-3} M \right)\right| Ag ( s )$
$E ^0\left( Ag ^{+} / Ag \right)=0.80 V$
$E ^0\left( Mg ^{2+} / Mg \right)=-2.37 V$
How would you bring about the following conversions?
i. Propanal to butanone
ii. Benzaldehyde to benzophenone
iii. Benzoyl chloride to benzonitrile
i. Propanal to butanone
ii. Benzaldehyde to benzophenone
iii. Benzoyl chloride to benzonitrile
Write the reactions and conditions for the following conversions:
i. 2-Propanone into 2-methyl-2-Proponal
ii. n-Propyl alcohol into hexane
i. 2-Propanone into 2-methyl-2-Proponal
ii. n-Propyl alcohol into hexane
Write the structure of A, B, C, D and E in the following reactions:
$(a)$ Give plausible explanation for each of the following$:$
$i.$ Why are amines less acidic than alcohols of comparable molecular masses?
$ii.$ Why are primary amines highest boiling than tertiary amines?
$iii.$ Why are aliphatic amines stronger bases than aromatic amines?
$(b)$ Complete the following reactions$:$
$i. C _6 H _5 N_2 Cl + C _2 H _5 OH \rightarrow$
$ii. C _6 H _5 NH _2+\left( CH _3 CO \right)_2 O \rightarrow$
View full solution →$i.$ Why are amines less acidic than alcohols of comparable molecular masses?
$ii.$ Why are primary amines highest boiling than tertiary amines?
$iii.$ Why are aliphatic amines stronger bases than aromatic amines?
$(b)$ Complete the following reactions$:$
$i. C _6 H _5 N_2 Cl + C _2 H _5 OH \rightarrow$
$ii. C _6 H _5 NH _2+\left( CH _3 CO \right)_2 O \rightarrow$
Using crystal field theory, draw energy level diagram, write the electronic configuration of the central metal atom/ion and determine the magnetic moment value in the following:
i. $\left[ CoF _6\right]^{3-},\left[ Co \left( H _2 O \right)_6\right]^{2+},\left[ Co ( CN )_6\right]^{3-}$
ii. $\left[ FeF _6\right]^{3-},\left[ Fe \left( H _2 O \right)_6\right]^{2+},\left[ Fe ( CN )_6\right]^{4-}$
View full solution →i. $\left[ CoF _6\right]^{3-},\left[ Co \left( H _2 O \right)_6\right]^{2+},\left[ Co ( CN )_6\right]^{3-}$
ii. $\left[ FeF _6\right]^{3-},\left[ Fe \left( H _2 O \right)_6\right]^{2+},\left[ Fe ( CN )_6\right]^{4-}$
Draw all the isomers of: (geometrical and optical)
i. $\left[ CoCl _2( en )_2\right]^{+}$
ii. $\left[ Co \left( NH _3\right) Cl ( en )^2\right]^{2+}$
iii. $\left[ Co \left( NH _3\right)_2 Cl _2( en )\right]^{+}$
View full solution →i. $\left[ CoCl _2( en )_2\right]^{+}$
ii. $\left[ Co \left( NH _3\right) Cl ( en )^2\right]^{2+}$
iii. $\left[ Co \left( NH _3\right)_2 Cl _2( en )\right]^{+}$
Attempt any five of the following$:$
$(a)$ Define native state in reference to proteins.
$(b)$ Define the following terms:
$a.$ Polysaccharides
$b.$ Nucleotides
$(c)$ Deficiency of which vitamin causes scurvy?
$(d)$ What happens when $D-$glucose is treated with the following? Give equations to support your answer.
$a. HI$
$b. HNO_3$
$(e)$ Name the disaccharide which on hydrolysis gives glucose and galactose.
$(f)$ Write the products obtained after hydrolysis of lactose.
$(g)$ Give the reaction of glucose with hydrogen cyanide. Presence of which group is confirmed by this reaction?
View full solution →$(a)$ Define native state in reference to proteins.
$(b)$ Define the following terms:
$a.$ Polysaccharides
$b.$ Nucleotides
$(c)$ Deficiency of which vitamin causes scurvy?
$(d)$ What happens when $D-$glucose is treated with the following? Give equations to support your answer.
$a. HI$
$b. HNO_3$
$(e)$ Name the disaccharide which on hydrolysis gives glucose and galactose.
$(f)$ Write the products obtained after hydrolysis of lactose.
$(g)$ Give the reaction of glucose with hydrogen cyanide. Presence of which group is confirmed by this reaction?
Read the following text carefully and answer the questions that follow:
A raw mango placed in concentrated salt solution loses water via osmosis and shrivel into pickle. Wilted flowers revive when placed in fresh water. A carrot that has become limp because of water loss into the atmosphere can be placed into the water making it firm once again. Water will move into its cells through osmosis. When placed in water containing less than 0.9% (mass/volume) salt, blood cells swell due to flow of water in them by osmosis.
i. People taking a lot of salt or salty food suffer from puffiness or edema. What is the reason behind this?
ii. The preservation of meat by salting and of fruits by adding sugar protects against bacterial action. How?
iii. Why the direction of osmosis gets reversed if a pressure larger than the osmotic pressure is applied to the solution side? Write its one application.
OR
iii.What care is generally taken during intravenous injections and why?
A raw mango placed in concentrated salt solution loses water via osmosis and shrivel into pickle. Wilted flowers revive when placed in fresh water. A carrot that has become limp because of water loss into the atmosphere can be placed into the water making it firm once again. Water will move into its cells through osmosis. When placed in water containing less than 0.9% (mass/volume) salt, blood cells swell due to flow of water in them by osmosis.
i. People taking a lot of salt or salty food suffer from puffiness or edema. What is the reason behind this?
ii. The preservation of meat by salting and of fruits by adding sugar protects against bacterial action. How?
iii. Why the direction of osmosis gets reversed if a pressure larger than the osmotic pressure is applied to the solution side? Write its one application.
OR
iii.What care is generally taken during intravenous injections and why?
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