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2025 34 questions

Q702025 · 4 Apr 2025 · Shift 1
1. A.A and C Only
2. B.A and D Only
3. C.B and D Only
4. D.C Only
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Answer: A
Q552025 · 4 Apr 2025 · Shift 2
1. A.(A) and (C) Only
2. B.(C) and (D) Only
3. C.(B), (C) and (E) Only
4. D.(A), (C) and (D) Only
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Answer: A
Q642025 · 4 Apr 2025 · Shift 2
1. A. $R > P > Q$
2. B. $P > Q > R$
3. C. $R > Q > P$
4. D. $Q > P > R$
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Answer: C
Q652025 · 4 Apr 2025 · Shift 2
Consider the given data : (a) $HCl (g) + 10 H_{2} O (l) \to HCl \cdot 10 H_{2} O Δ H = - 69.01 kJ mol^{- 1}$ (b) $HCl (g) + 40 H_{2} O (l) \to HCl \cdot 40 H_{2} O Δ H = - 72.79 kJ mol^{- 1}$ Choose the correct statement :
1. A.The heat of dilution for the $HCl$ ( $HCl \cdot 10 H_{2} O$ to $HCl \cdot 40 H_{2} O$ ) is $3.78 kJ mol^{- 1}$ .
2. B.Dissolution of gas in water is an endothermic process.
3. C.The heat of solution depends on the amount of solvent.
4. D.The heat of formation of $HCl$ solution is represented by both (a) and (b).
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Answer: C
Q612025 · 3 Apr 2025 · Shift 1
1. A.Molar heat capacity
2. B.Concentration
3. C.Gibbs free energy
4. D.Density
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Answer: C
Q632025 · 3 Apr 2025 · Shift 1
1. A.B
2. B.D
3. C.A
4. D.C
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Answer: B
Q642025 · 3 Apr 2025 · Shift 1
Among $1 0^{- 9} g$ (each) of the following elements, which one will have the highest number of atoms? Element: Pb, Po, Pr and Pt
1. A.Pr
2. B.Pt
3. C.Po
4. D.Pb
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Answer: A
Q752025 · 3 Apr 2025 · Shift 1· Numerical answer
Given : $Δ H^{⊖}_{sub} [C (graphite)] = 710 kJ mol^{- 1}$ $Δ_{C - H} H^{⊖} = 414 kJ mol^{- 1}$ $Δ_{H - H} H^{⊖} = 436 kJ mol^{- 1}$ $Δ_{C = C} H^{⊖} = 611 kJ mol^{- 1}$ The $Δ H_{f}^{⊖}$ for $CH_{2} = CH_{2}$ is________ $kJ mol^{- 1}$ (nearest integer value)
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Answer: 25
Q512025 · 2 Apr 2025 · Shift 1
1. A.III, II
2. B.II, IV
3. C.I, IV
4. D.II, I
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Answer: D
Q522025 · 2 Apr 2025 · Shift 1
$CaCO_{3} (s) + 2 HCl (aq) \to CaCl_{2} (aq) + CO_{2} (g) + H_{2} O (l)$ Consider the above reaction, what mass of $CaCl_{2}$ will be formed if $250 mL$ of $0.76 M HCl$ reacts with $1000 g$ of $CaCO_{3}$ ? (Given : Molar mass of Ca, C, O, H and Cl are $40, 12, 16, 1$ and $35.5 g mol^{- 1}$ , respectively)
1. A.3.908 g
2. B.2.636 g
3. C.10.545 g
4. D.5.272 g
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Answer: C
Q652025 · 2 Apr 2025 · Shift 1
1. A.
2. B.
3. C.
4. D.
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Answer: B
Q672025 · 2 Apr 2025 · Shift 1
Identify the correct statement among the following :
1. A.All naturally occurring amino acids except glycine contain one chiral centre.
2. B.Amino acid, cysteine can easily undergo dimerisation due to the presence of free SH group.
3. C.Glutamic acid is the only amino acid that contains a $- COOH$ group at the side chain.
4. D.All naturally occurring amino acids are optically active.
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Answer: B
Q712025 · 2 Apr 2025 · Shift 1· Numerical answer
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Answer: 2435
Q722025 · 2 Apr 2025 · Shift 1· Numerical answer
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Answer: 372
Q512025 · 2 Apr 2025 · Shift 2
Given below are two statements : Statement (I) : Neopentane forms only one monosubstituted derivative. Statement (II) : Melting point of neopentane is higher than n-pentane. In the light of the above statements, choose the most appropriate answer from the options given below :
1. A.Statement I is incorrect but Statement II is correct
2. B.Both Statement I and Statement II are correct
3. C.Statement I is correct but Statement II is incorrect
4. D.Both Statement I and Statement II are incorrect
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Answer: B
Q612025 · 2 Apr 2025 · Shift 2
1. A.
2. B.
3. C.
4. D.
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Answer: A
Q622025 · 2 Apr 2025 · Shift 2
1. A.
2. B.
3. C.
4. D.
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Answer: D
Q712025 · 2 Apr 2025 · Shift 2· Numerical answer
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Answer: 43
Q712025 · 29 Jan 2025 · Shift 2· Numerical answer
Total number of non-bonded electrons present in $N O_{2}^{-}$ ion based on Lewis theory is ____.
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Answer: 12
Q622025 · 28 Jan 2025 · Shift 1
1. A.A and C Only
2. B.A, B and E Only
3. C.A and B Only
4. D.A, C and D Only
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Answer: D
Q692025 · 28 Jan 2025 · Shift 1
The molecules having square pyramidal geometry are
1. A. $Br F_{5} & PC l_{5}$
2. B. $Sb F_{5} & PC l_{5}$
3. C. $Br F_{5} & XeO F_{4}$
4. D. $Sb F_{5} & XeO F_{4}$
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Answer: C
Q702025 · 28 Jan 2025 · Shift 1
Ice and water are placed in a closed container at a pressure of 1 atm and temperature 273.15 K . If pressure of the system is increased 2 times, keeping temperature constant, then identify correct observation from following
1. A.Liquid phase disappears completely.
2. B.The amount of ice decreases.
3. C.The solid phase (ice) disappears completely.
4. D.Volume of system increases .
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Answer: C
Q512025 · 24 Jan 2025 · Shift 1
For a reaction, $N_{2} O_{5 (g)} \to 2N O_{2 (g)} + \frac{1}{2} O_{2 (g)}$ in a constant volume container, no products were present initially. The final pressure of the system when $50%$ of reaction gets completed is
1. A. $5/2 times of initial pressure$
2. B. $7/2 times of initial pressure$
3. C. $7/4 times of initial pressure$
4. D. $5 times of initial pressure$
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Answer: C
Q652025 · 24 Jan 2025 · Shift 1
Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?
1. A.acetophenone < benzaldehyde < p-tolualdehyde < p-nitrobenzaldehyde
2. B.acetophenone < p-tolualdehyde < benzaldehyde < p-nitrobenzaldehyde
3. C.p-nitrobenzaldehyde < benzaldehyde < p-tolualdehyde < acetophenone
4. D.benzaldehyde < acetophenone < p-nitrobenzaldehyde < p-tolualdehyde
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Answer: B
Q692025 · 24 Jan 2025 · Shift 1
1. A.Q
2. B.S
3. C.P
4. D.R
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Answer: A