Chemistry
General
Easy
Question
Match the columns.
Column I Column II
A) NaCl (P) Cationic hydrolysis
B) Na2CO3 (Q) Anionic hydrolysis
C) NH4Cl (R) pH = 7.0 at 25oC
D) CH3COONH4 (S) pH < 7.0 at 25oC
(T) pH > 7.0 at 25oC
Ka, CH3COOH = Kb, NH4OH
- A → Q; B → R, T; C → P, S; D → P, Q, R
- A → Q; B → R, T; C → P,Q,R, S; D → P
- A → P; B → R, T; C → P,Q,R, S; D → Q
- A → R; B → Q, T; C → P, S; D → P, Q, R
The correct answer is: A → R; B → Q, T; C → P, S; D → P, Q, R
Sol: NaCl is salt of a strong acid and strong base, Na2CO3 is salt of weak acid strong base.
NH4Cl is salt of a strong acid strong base CH3COONH4 is a salt of weak acid and weak base.
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Chemistry
Column I (pH value) Column II (Solution)
A) 5.0 (P) pH at which Mg(OH)2 just start precipitating from 2.0×10−3 M-Mg2+ solution (Ksp of Mg(OH)2 = 2 × 10−6 M3 ).
B) 9.0 (Q) Maximum pH at which 0.1 mole of Al(OH)3 dissolves completely as Al3+ in 1 L solution (Ksp of Al(OH)3 = 1 × 10−28 M4).
C) 12.5 (R) pH at which 0.1 M-CH3COOH dissociates 1000/11% (Ka of CH3COOH = 1.0×10−5M).
D) 6.0 (S) pH of 0.001 M-HA (weak acid) solution (pKa of HA = pKb of A−).
(T) pH of 3×10−5 M-CaA2 solution (CaA2 dissociates completely in water; Ka of HA = 5 × 10−9).
Column I (pH value) Column II (Solution)
A) 5.0 (P) pH at which Mg(OH)2 just start precipitating from 2.0×10−3 M-Mg2+ solution (Ksp of Mg(OH)2 = 2 × 10−6 M3 ).
B) 9.0 (Q) Maximum pH at which 0.1 mole of Al(OH)3 dissolves completely as Al3+ in 1 L solution (Ksp of Al(OH)3 = 1 × 10−28 M4).
C) 12.5 (R) pH at which 0.1 M-CH3COOH dissociates 1000/11% (Ka of CH3COOH = 1.0×10−5M).
D) 6.0 (S) pH of 0.001 M-HA (weak acid) solution (pKa of HA = pKb of A−).
(T) pH of 3×10−5 M-CaA2 solution (CaA2 dissociates completely in water; Ka of HA = 5 × 10−9).
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A ketone reacted with 
reagent followed by hydrolysis gave a product which on dehydration gives an alkene. The alkene on ozonolysis gave diethyl ketone and acetaldehyde. The ketone is:
A ketone reacted with reagent followed by hydrolysis gave a product which on dehydration gives an alkene. The alkene on ozonolysis gave diethyl ketone and acetaldehyde. The ketone is:
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Consider the reaction:
What sort of reaction is it?
Consider the reaction:
What sort of reaction is it?
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In the above reactions ‘A’ and ‘B’ respectively are
In the above reactions ‘A’ and ‘B’ respectively are
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Amides may be converted into amines by reaction named after:
Amides may be converted into amines by reaction named after:
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Carboxylic acids dissolve in NaOH because the acids undergo:
Carboxylic acids dissolve in NaOH because the acids undergo:
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0.20 g of a hydrocarbon on combustion gave 0.66 g CO2 .The percentage of hydrogen in the hydrocarbon is about :
0.20 g of a hydrocarbon on combustion gave 0.66 g CO2 .The percentage of hydrogen in the hydrocarbon is about :
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Match the columns.
|
Column I |
Column II |
|||
| A) |
 |
P) |
Unaffected by inert gas addition |
|
| B) |
 |
Q) |
Forward shift by rise in pressure and backward shift by inert gas addition. |
|
| C) |
 |
R) |
Unaffected by increase in pressure. |
|
| D) |
 |
S) |
Backward shift by rise in pressure and forward shift by inert gas addition. |
|
Match the columns.
|
Column I |
Column II |
|||
| A) |
|
P) |
Unaffected by inert gas addition |
|
| B) |
|
Q) |
Forward shift by rise in pressure and backward shift by inert gas addition. |
|
| C) |
|
R) |
Unaffected by increase in pressure. |
|
| D) |
|
S) |
Backward shift by rise in pressure and forward shift by inert gas addition. |
|
ChemistryGeneral
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In Gattermann Koch reaction
the product formed is
In Gattermann Koch reactionthe product formed is
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Which one of the following has no stereogenic center?
Which one of the following has no stereogenic center?
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