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2024 85 questions

Q722024 · 31 Jan 2024 · Shift 2
Which of the following is least ionic?
1. A. $CoC l_{2}$
2. B. $KCl$
3. C. $BaC l_{2}$
4. D. $AgCl$
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Answer: D
Q742024 · 31 Jan 2024 · Shift 2
Identify the name reaction. [structure: benzene] $CO, HCl Anhyd. AlC l_{3} /CuCl$ [structure: benzaldehyde, $C_{6} H_{5} CHO$ ]
1. A.Stephen Reaction
2. B.Etard Reaction
3. C.Gatterman - Koch Reaction
4. D.Rosenmund Reduction
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Answer: C
Q802024 · 31 Jan 2024 · Shift 2
A sample of $CaC O_{3}$ and $MgC O_{3}$ weighed $2.21 g$ is ignited to constant weight of $1.152 g$ . The composition of mixture is : (Given molar mass in $g mo l^{- 1}$ $CaC O_{3} : 100, MgC O_{3} : 84$ )
1. A. $1.187 g CaC O_{3} + 1.187 g MgC O_{3}$
2. B. $1.187 g CaC O_{3} + 1.023 g MgC O_{3}$
3. C. $1.023 g CaC O_{3} + 1.187 g MgC O_{3}$
4. D. $1.023 g CaC O_{3} + 1.023 g MgC O_{3}$
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Answer: B
Q862024 · 31 Jan 2024 · Shift 2· Numerical answer
A compound $(x)$ with molar mass $108 g mo l^{- 1}$ undergoes acetylation to give product with molar mass $192 g mo l^{- 1}$ . The number of amino groups in the compound $(x)$ is ____.
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Answer: 2
Q902024 · 31 Jan 2024 · Shift 2· Numerical answer
$r = k [A]$ for a reaction, $50%$ of $A$ is decomposed in 120 minutes. The time taken for $90%$ decomposition of $A$ is ____ minutes.
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Answer: 399
Q622024 · 30 Jan 2024 · Shift 1
1. A.
2. B.
3. C.
4. D.
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Answer: D
Q652024 · 30 Jan 2024 · Shift 1
1. A.Wolff-Kishner reduction
2. B.Etard reduction
3. C.Stephen reduction
4. D.Rosenmund reduction
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Answer: D
Q672024 · 30 Jan 2024 · Shift 1
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: B
Q692024 · 30 Jan 2024 · Shift 1
Match List I with List II. | | List I (Molecule) | | List II (Shape) | |---|---|---|---| | (A) | $Br F_{5}$ | (I) | T-Shape | | (B) | $H_{2} O$ | (II) | See saw | | (C) | $Cl F_{3}$ | (III) | Bent | | (D) | $S F_{4}$ | (IV) | Square pyramidal | Choose the correct answer from the options given below :
1. A.(A)-(I), (B)-(II), (C)-(IV), (D)-(III)
2. B.(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
3. C.(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
4. D.(A)-(II), (B)-(I), (C)-(III), (D)-(IV)
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Answer: B
Q702024 · 30 Jan 2024 · Shift 1
Match List I with List II. | | List I (Species) | | List II (Electronic distribution) | |---|---|---|---| | (A) | $C r^{+ 2}$ | (I) | $3 d^{8}$ | | (B) | $M n^{+}$ | (II) | $3 d^{3} 4 s^{1}$ | | (C) | $N i^{+ 2}$ | (III) | $3 d^{4}$ | | (D) | $V^{+}$ | (IV) | $3 d^{5} 4 s^{1}$ | Choose the correct answer from the options given below :
1. A.(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
2. B.(A)-(I), (B)-(II), (C)-(III), (D)-(IV)
3. C.(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
4. D.(A)-(II), (B)-(I), (C)-(IV), (D)-(III)
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Answer: A
Q802024 · 30 Jan 2024 · Shift 1
1. A.
2. B.
3. C.
4. D.
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Answer: C
Q832024 · 30 Jan 2024 · Shift 1· Numerical answer
$0.05 cm$ thick coating of silver is deposited on a plate of $0.05 m^{2}$ area. The number of silver atoms deposited on plate are _________ $\times 1 0^{23}$ . (At mass $Ag = 108$ , $d = 7.9 g cm^{- 3}$ )
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Answer: 11
Q862024 · 30 Jan 2024 · Shift 1· Numerical answer
$2 Mn O_{4}^{-} + b I^{-} + c H_{2} O \to x I_{2} + y Mn O_{2} + z O H^{-}$ If the above equation is balanced with integer coefficients, the value of $z$ is _________.
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Answer: 8
Q612024 · 29 Jan 2024 · Shift 1
Identify the incorrect pair from the following :
1. A.Fluoroapatite $- 3 Ca_{3} (PO_{4})_{2} \cdot CaF_{2}$
2. B.Carnallite $- KCl \cdot MgCl_{2} \cdot 6 H_{2} O$
3. C.Cryolite $- Na_{3} AlF_{6}$
4. D.Fluorspar $- BF_{3}$
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Answer: D
Q742024 · 29 Jan 2024 · Shift 1
Which of the following is not correct?
1. A. $Δ G$ is positive for a spontaneous reaction
2. B. $Δ G$ is positive for a non-spontaneous reaction
3. C. $Δ G$ is zero for a reversible reaction
4. D. $Δ G$ is negative for a spontaneous reaction
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Answer: A
Q772024 · 29 Jan 2024 · Shift 1
$KMn O_{4}$ decomposes on heating at $513 K$ to form $O_{2}$ along with
1. A. $K_{2} Mn O_{4} & Mn$
2. B. $Mn O_{2} & K_{2} O_{2}$
3. C. $K_{2} Mn O_{4} & Mn O_{2}$
4. D. $Mn & K O_{2}$
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Answer: C
Q802024 · 29 Jan 2024 · Shift 1
In alkaline medium, $Mn O_{4}^{-}$ oxidises $I^{-}$ to
1. A. $I_{2}$
2. B. $I O_{3}^{-}$
3. C. $I O^{-}$
4. D. $I O_{4}^{-}$
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Answer: B
Q652024 · 29 Jan 2024 · Shift 2
1. A.Cyclohex-2-en-1-ol
2. B.1-Hydroxyhex-2-ene
3. C.Cyclohex-1-en-3-ol
4. D.Cyclohex-1-en-2-ol
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Answer: A
Q662024 · 29 Jan 2024 · Shift 2
Match List I with List II | | List - I (Spectral Series for Hydrogen) | | List - II (Spectral Region/Higher Energy State) | |---|---|---|---| | (A) | Lyman | (I) | Infrared region | | (B) | Balmer | (II) | UV region | | (C) | Paschen | (III) | Infrared region | | (D) | Pfund | (IV) | Visible region | Choose the correct answer from the options given below:
1. A.A-II, B-IV, C-III, D-I
2. B.A-I, B-III, C-II, D-IV
3. C.A-II, B-III, C-I, D-IV
4. D.A-I, B-II, C-III, D-IV
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Answer: A
Q692024 · 29 Jan 2024 · Shift 2
1. A. $A < B < D < C$
2. B. $A < B < C < D$
3. C. $D < C < B < A$
4. D. $C < D < B < A$
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Answer: D
Q832024 · 29 Jan 2024 · Shift 2· Numerical answer
If $50 mL$ of $0.5 M$ oxalic acid is required to neutralise $25 mL$ of $NaOH$ solution, the amount of $NaOH$ in $50 mL$ of given $NaOH$ solution is _________ g.
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Answer: 4
Q622024 · 27 Jan 2024 · Shift 1
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: B
Q662024 · 27 Jan 2024 · Shift 1
1. A.
2. B.
3. C.
4. D.
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Answer: D
Q692024 · 27 Jan 2024 · Shift 1
Choose the polar molecule from the following:
1. A. $CC l_{4}$
2. B. $C O_{2}$
3. C. $C H_{2} = C H_{2}$
4. D. $CHC l_{3}$
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Answer: D
Q752024 · 27 Jan 2024 · Shift 1
Yellow compound of lead chromate gets dissolved on treatment with hot $NaOH$ solution. The product of lead formed is a :
1. A.Tetraanionic complex with coordination number six
2. B.Neutral complex with coordination number four
3. C.Dianionic complex with coordination number six
4. D.Dianionic complex with coordination number four
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Answer: D