MCQ 14 Marks
When HCI react's with finely powdered iron, which of the following is produced?
- ✓$FeCl _2+ H _2$
- B$FeCl _3+ H _2$
- CBoth 1 and 2
- DOnly $FeCl _2$
Answer
View full question & answer→Correct option: A.
$FeCl _2+ H _2$
A
Questions
SECTION - A [CHEMISTY - MCQ]
Take a timed test
45 questions · 39 auto-graded MCQ + 6 self-marked written.
MCQ 24 Marks
Correct order of catenation tendency:
- A$C > Si > Ge > Sn$
- ✓$C \gg Si > Ge \simeq Sn$
- C$Si > C > Sn > Ge$
- D$Ge > Sn > Si > C$
Answer
View full question & answer→Correct option: B.
$C \gg Si > Ge \simeq Sn$
(B) $C \gg Si > Ge \simeq Sn$,
Correct order of catenation tendency
Correct order of catenation tendency
MCQ 34 Marks
Which of the following does not exist?
- A$XeOF _4$
- ✓$NeF _2$
- C$XeF _2$
- D$XeF _6$
Answer
View full question & answer→Correct option: B.
$NeF _2$
B
MCQ 44 Marks
Correct order of C-O bond length among CO, $CO _3^{-2}, CO _2$ is
- A$CO < CO _3^{-2}< CO _2$
- B$CO _3^{-2}< CO _2< CO$
- ✓$CO < CO _2< CO _3^{-2}$
- D$CO _2< CO < CO _3^{-2}$
Answer
View full question & answer→Correct option: C.
$CO < CO _2< CO _3^{-2}$
C
MCQ 54 Marks
Observe the following diagram for boiling points of different alkanes. Identify the hydrocarbons $X$, $Y , Z , W , R$
- A
- B
- C
- D
MCQ 64 Marks
$A$ and $B$ will be respectively:
- A
- ✓
- C
- D
Answer
View full question & answer→Correct option: B.
(B)
,
,MCQ 74 Marks
Cyclohexylamine when treated with nitrous acid yields (P). On treating (P) with PCC results in (Q). When (Q) is heated with dil. NaOH we get ( R ). The final product ( $R$ ) is :
- A
- B
- C
- D
Answer
View full question & answer→
MCQ 84 Marks
Number of compounds give positive iodoform test from the following is
- ✓5
- B4
- C3
- D6
Answer
View full question & answer→Correct option: A.
5
A
MCQ 94 Marks
The major product '$P$' for the following sequence of reactions is:
- A
- B
- ✓
- D
Answer
View full question & answer→Correct option: C.
(C)
,
,MCQ 104 Marks
The structure of major products A, B and C in the following reaction sequence are:
- A
- B
- C
- ✓
Answer
View full question & answer→Correct option: D.
D
MCQ 114 Marks
Major product of the given reaction
- A
- B
- ✓
- D
Answer
View full question & answer→Correct option: C.
C
MCQ 124 Marks
The end product $( Y ) \&( Z )$ in the reaction is:
- A
- B
- C
- D
MCQ 134 Marks
identify the structure of the alkene:
- A
- B
- ✓
- D
Answer
View full question & answer→Correct option: C.
(C)
,
,MCQ 144 Marks
- A
- B
- C
- D
Answer
View full question & answer→
MCQ 154 Marks
Decreasing order towards $S_N I$ reaction for the following compounds is:
- Aa $>$ c $>$ d $>$ b
- Ba $>$ b $>$ c $>$ d
- Cb $>$ d $>$ c $>$ a
- Dd $>$ b $>$ c $>$ a
MCQ 164 Marks
Match list-l with list-ll
Choose the correct answer from the options given below:
| List - l | List - lI |
| (A) $\left[ Ni ( Cl )_4\right]^{-2}$ | (i) 5.92 Β.Μ. |
| (B) $\left[ Co \left( C _2 O _4\right)_3\right]^{-3}$ | (ii) 1.73 B.M |
| (C) $\left[ FeF _6\right]^{-3}$ | (iii) 0 B.M. |
| (D) $\left[ Mn ( CN )_6\right]^{-}$ | (iv) 2.82 Β.Μ. |
- ✓(A)-(iv), (B)-(iii), (C)-(i), (D)-(ii)
- BA-(iv), (B)-(iii), (C)- (ii), (D)-(i)
- C(A)-(iii), (B)-(iv), (C)-(i), (D)-(ii)
- D(A)-(i), (B)-(iii), (C)-(ii), (D)-(iv)
Answer
View full question & answer→Correct option: A.
(A)-(iv), (B)-(iii), (C)-(i), (D)-(ii)
A
MCQ 174 Marks
Maximum number of isomeric monochloro derivatives which can be obtained from 2,2,5,5-tetramethylhexane by chlorination is (excluding stereo isomer)
- A3
- ✓2
- C4
- D5
Answer
View full question & answer→Correct option: B.
2
B
MCQ 184 Marks
When 0.01 mol of an organic compound containing $60 \%$ carbon was burnt completely, 4.4 g of $CO _2$ was produced. The molar mass of compound in g $mol ^{-1}$ is
- A150
- B250
- C100
- ✓200
Answer
View full question & answer→Correct option: D.
200
D
MCQ 194 Marks
In which of the compound does hydrogen have an oxidation state of $- 1$ ?
- A$CH _4$
- B$NH _3$
- CHCl
- ✓$CaH _2$
Answer
View full question & answer→Correct option: D.
$CaH _2$
D
MCQ 204 Marks
The equilibrium constant for the reaction $Zn ( s )+ Sn ^{2+}( aq ) \rightleftharpoons Zn ^{2+}( aq )+ Sn ( s )$ is $1 \times 10^{20}$ at 298 K. The magnitude of standard electrode potential of $Sn / Sn ^{2+}$ if $E _{ Zn ^{2+} / Zn }^{\circ}=-0.76 V$
Given : $\frac{2.303 R T}{F}=0.059 V$
Given : $\frac{2.303 R T}{F}=0.059 V$
- A$12 \times 10^{-2} V$
- ✓$17 \times 10^{-2} V$
- C$28 \times 10^{-2} V$
- D$22 \times 10^{-2} V$
Answer
View full question & answer→Correct option: B.
$17 \times 10^{-2} V$
B
MCQ 214 Marks
The standard electrode potential $\left( M ^{3+} / M ^{2+}\right)$ for V , Cr Mn & Co are $-0.26 V,-0.41 V,+1.57 V$ and $+1.97 V$ , respectively. The metal ions which can liberate $H _2$ from a dilute acid are
- A$V ^{2+}$ and $Mn ^{2+}$
- B$Cr ^{2+}$ and $Co ^{2+}$
- ✓$V ^{2+}$ and $Cr ^{2+}$
- D$Mn ^{2+}$ and $Co ^{2+}$
Answer
View full question & answer→Correct option: C.
$V ^{2+}$ and $Cr ^{2+}$
(C) $V ^{2+}$ and $Cr ^{2+}$,
A.S. $\propto \frac{- M ,- I }{+ M ,+1}$
A.S. $\propto \frac{- M ,- I }{+ M ,+1}$
MCQ 224 Marks
How much amount of KCl is added in 500g of water to decrease the freezing point of water to $-0.2^{\circ} C$
$\left[K_{f}\left(H_2 O\right)=2 K Kg mol^{-1}\right]$
$\left[K_{f}\left(H_2 O\right)=2 K Kg mol^{-1}\right]$
- A3.725 g
- B7.4 g
- ✓1.8625 g
- D6.2 g
Answer
View full question & answer→Correct option: C.
1.8625 g
(C) 1.8625 g,
$\Delta T _{ f }= i . K _{ f } \cdot m$
$\Delta T _{ f }= i . K _{ f } \cdot m$
MCQ 234 Marks
The major product obtained would be:
- A
- B
- ✓
- D
Answer
View full question & answer→Correct option: C.
(C)
,
Electrophilic addition reaction of alkene
,Electrophilic addition reaction of alkene
MCQ 244 Marks
In the above sequence of reactions, the product $( E )$ is
- A
- B
- ✓
- D
Answer
View full question & answer→Correct option: C.
(C)
,
,MCQ 254 Marks
- AA
- ✓B
- CC
- DD
Answer
View full question & answer→Correct option: B.
B
(B) B,
The product (D) is same as B
The product (D) is same as B
MCQ 264 Marks
- A43
- ✓25
- C4
- D29
Answer
View full question & answer→Correct option: B.
25
B
MCQ 274 Marks
Which of the following graph is incorrect for first order reaction?
- A
- B
- C
- ✓
Answer
View full question & answer→Correct option: D.
D
MCQ 284 Marks
Which among the following species does not exist in normal condition?
- A$He _2^{+}$
- B$H _2^{+}$
- C$H _2^{-}$
- ✓$Be _2$
Answer
View full question & answer→Correct option: D.
$Be _2$
D
MCQ 294 Marks
Which has highest pKa value among phenol is
- A2,4-Dinitrophenol
- B4-Nitrophenol
- ✓2, 4, 5-Trimethylphenol
- D3-Chlorophenol
Answer
View full question & answer→Correct option: C.
2, 4, 5-Trimethylphenol
(C) 2, 4, 5-Trimethylphenol,
Highest pKa value among phenol is 2, 4, 5-Trimethylphenol
Highest pKa value among phenol is 2, 4, 5-Trimethylphenol
MCQ 304 Marks
In the depression of freezing point experiment
A. Vapour pressure of the solution is less than that of pure solvent
B. Vapour pressure of the solution is more than that of pure solvent
C. Only solute molecules solidify at the freezing point
D. Only solvent molecules solidify at the freezing point
which statement(s) is/are correct.
A. Vapour pressure of the solution is less than that of pure solvent
B. Vapour pressure of the solution is more than that of pure solvent
C. Only solute molecules solidify at the freezing point
D. Only solvent molecules solidify at the freezing point
which statement(s) is/are correct.
- ✓A and D only
- BB and C only
- CA and C only
- DA only
Answer
View full question & answer→Correct option: A.
A and D only
(A) A and D only,
A. Vapour pressure of the solution is less than that of pure solvent
D. Only solvent molecules solidify at the freezing point
A. Vapour pressure of the solution is less than that of pure solvent
D. Only solvent molecules solidify at the freezing point
MCQ 314 Marks
In which of the following molecule/ions $BF _3, NO _2^{-}$, $NH _2^{-}$and $H _2 O$, the central atom is $s p ^{ 2 }$ hybridized
- ✓$BF 3$ and $NO _2^{-}$
- B$NO _2^{-}$and $NH _2^{-}$
- C$NH _2^{-}$and $H _2 O$
- D$NO _2^{-}$and $H _2 O$
Answer
View full question & answer→Correct option: A.
$BF 3$ and $NO _2^{-}$
A
MCQ 324 Marks
If $\Delta_0< P$ then correct configuration for $d^4$ would be-
- ✓$t _{2 g}{ }^3 eg ^1$
- B$t _{2 g}{ }^4 eg ^0$
- C$t _{2 g}{ }^2 eg ^2$
- D$t_{2 g}{ }^0 eg ^4$
Answer
View full question & answer→Correct option: A.
$t _{2 g}{ }^3 eg ^1$
A
MCQ 334 Marks
Select equations having exothermic step:
- A$S ^{-}( g )+ e ^{-}( g ) \rightarrow S ^{2-}( g )$
- B$Ne ( g )+ e ^{-}( g ) \rightarrow Ne ^{-}( g )$
- C$N ( g )+ e ^{-}( g ) \rightarrow N ^{-}( g )$
- ✓$P ( g )+ e ^{-}( g ) \rightarrow P ^{-}( g )$
Answer
View full question & answer→Correct option: D.
$P ( g )+ e ^{-}( g ) \rightarrow P ^{-}( g )$
(D) $P ( g )+ e ^{-}( g ) \rightarrow P ^{-}( g )$,
Exothermic step $P ( g )+ e ^{-}( g ) \rightarrow P ^{-}( g )$
Exothermic step $P ( g )+ e ^{-}( g ) \rightarrow P ^{-}( g )$
MCQ 344 Marks
Consider the variation of ionization energy across the $3^{\text {rd }}$ period $L \rightarrow R$. (Left to right) What is the element E?
- ANa
- BS
- ✓P
- DCl
Answer
View full question & answer→Correct option: C.
P
C
MCQ 354 Marks
If atomic radius of Fluorine is X and for Neon is Y, then what is relation between $X$ and $Y$ ?
- A$X>Y$
- ✓$X< Y$
- C$X=Y$
- DNone
Answer
View full question & answer→Correct option: B.
$X< Y$
B
MCQ 364 Marks
How many elements present in $4^{\text {th }}$ period which are having electrons of 4d subshell?
- A10
- B8
- ✓$0$
- D2
Answer
View full question & answer→Correct option: C.
$0$
C
MCQ 374 Marks
The total spin of ${ }_{25} Fe ^{ x +}$ is $\pm \frac{5}{2}$. The value of x is:
- A1
- B2
- ✓3
- D4
Answer
View full question & answer→Correct option: C.
3
(C) 3
The value of $x$ is 3
The value of $x$ is 3
MCQ 384 Marks
A & B are respectively :
- A
- B
- C
- D
Answer
View full question & answer→
MCQ 394 Marks
The dissociation constant of acetic acid is $x \times 10^{-5}$. When 25 mL of $0.2\ M\ CH _3 COONa$ solution is mixed with 25 mL of $0.02\ M\ CH _3 COOH$ solution, the pH of the resultant solution is found to be equal to 5. The value of $x$ is
- ✓10
- B8
- C6
- D2
Answer
View full question & answer→Correct option: A.
10
(A) 10
$K_a=c \alpha^2$
$K_a=c \alpha^2$
MCQ 404 Marks
For the reversible reaction
$N _2 O _4(g) \rightleftharpoons 2 NO _2(g)$-heat
The equilibrium will be disturbed -
$N _2 O _4(g) \rightleftharpoons 2 NO _2(g)$-heat
The equilibrium will be disturbed -
- ABy decreasing concentration of $NO _2(g)$
- BBy increasing pressure and decreasing temperature
- CBy adding $Ne ( g )$ at constant volume
- ✓Both (1) and (2)
Answer
View full question & answer→Correct option: D.
Both (1) and (2)
(D) Both (1) and (2),
(1) By decreasing concentration of $NO _2(g)$
(2) By increasing pressure and decreasing temperature
(1) By decreasing concentration of $NO _2(g)$
(2) By increasing pressure and decreasing temperature
MCQ 414 Marks
The heat of reaction for
$MO \rightarrow M +\frac{1}{2} O _2$ is 50 kcal and
$MO _2 \rightarrow MO +\frac{1}{2} O _2$ is -100 kcal.
The heat of reaction for $M + O _2 \rightarrow MO _2$ is -
$MO \rightarrow M +\frac{1}{2} O _2$ is 50 kcal and
$MO _2 \rightarrow MO +\frac{1}{2} O _2$ is -100 kcal.
The heat of reaction for $M + O _2 \rightarrow MO _2$ is -
- A-50 kcal
- B-150 kcal
- ✓50 kcal
- D+150 kcal
Answer
View full question & answer→Correct option: C.
50 kcal
C
MCQ 424 Marks
Assertion (A): Internal energy of an ideal gas at a particular temperature does not depend on volume.
Reason (R): State function depends only on temperature.
Reason (R): State function depends only on temperature.
- ABoth Assertion and Reason are true and Reason is correct explanation of the Assertion.
- BBoth Assertion and Reason are true but Reason is not a correct explanation of the Assertion.
- ✓Assertion is true but Reason is false.
- DBoth Assertion and Reason are false.
Answer
View full question & answer→Correct option: C.
Assertion is true but Reason is false.
C
MCQ 434 Marks
If color of $\left[ Ni \left( H _2 O \right)_6\right]_{( aq )}^{+2}$ is green then what would be the color of $\left[ Ni ( en )_3\right]_{( aq )}^{ +2 }$ ?
- ✓Violet
- BRed
- COrange
- DCan't predict
Answer
View full question & answer→Correct option: A.
Violet
A
MCQ 444 Marks
Assume that the radius of the first Bohr orbit of hydrogen atom is $0.6 Å$. The radius of the third Bohr orbit of $He ^{+}$in picometer is -
- A240
- B300
- ✓270
- D320
Answer
View full question & answer→Correct option: C.
270
C
MCQ 454 Marks
250 mL of 0.1 M solution of $C _2 O _4{ }^{-2}$ in acidic medium completely reduce
- A200 mL of $0.1 M KMnO _4$ solution
- B250 mL of $0.2 M K _2 Cr _2 O _7$ solution
- ✓100 mL of $0.1 M KMnO _4$ solution
- D100 mL of $0.1 M K _2 Cr _2 O _7$ solu
Answer
View full question & answer→Correct option: C.
100 mL of $0.1 M KMnO _4$ solution
C