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2023 96 questions

Q702023 · 8 Apr 2023 · Shift 2
1. A.
2. B.
3. C.
4. D.
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Answer: A
Q742023 · 8 Apr 2023 · Shift 2
Which of the following have same number of significant figures? A. 0.00253 B. 1.0003 C. 15.0 D. 163 Choose the correct answer from the options given below
1. A.A, C and D only
2. B.B and C only
3. C.A, B and C only
4. D.C and D only
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Answer: A
Q782023 · 8 Apr 2023 · Shift 2
In Hall - Heroult process, the following is used for reducing $A l_{2} O_{3}$ :-
1. A.Magnesium
2. B. $Ca F_{2}$
3. C.Graphite
4. D. $N a_{3} Al F_{6}$
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Answer: C
Q802023 · 8 Apr 2023 · Shift 2
Which of the following can reduce decomposition of $H_{2} O_{2}$ on exposure to light :
1. A.Urea
2. B.Glass containers
3. C.Alkali
4. D.Dust
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Answer: A
Q902023 · 8 Apr 2023 · Shift 2· Numerical answer
Coagulating value of the electrolytes $AlC l_{3}$ and $NaCl$ for $A s_{2} S_{3}$ are $0.09$ and $50.04$ respectively. The coagulating power of $AlC l_{3}$ is $x$ times the coagulating power of $NaCl$ . The value of $\underline{x}$ is ____.
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Answer: 556
Q672023 · 6 Apr 2023 · Shift 1
Match List I with List II | LIST I (Oxide) | LIST II (Type of bond) | | :--- | :--- | | A. $N_{2} O_{4}$ | I. $1 N = O bond$ | | B. $NO_{2}$ | II. $1 N - O - N bond$ | | C. $N_{2} O_{5}$ | III. $1 N - N bond$ | | D. $N_{2} O$ | IV. $1 N = N / N \equiv N bond$ | Choose the correct answer from the options given below:
1. A.A-II, B-I, C-III, D-IV
2. B.A-III, B-I, C-II, D-IV
3. C.A-III, B-I, C-IV, D-II
4. D.A-II, B-IV, C-III, D-I
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Answer: B
Q682023 · 6 Apr 2023 · Shift 1
The difference between electron gain enthalpies will be maximum between :
1. A.Ar and Cl
2. B.Ne and Cl
3. C.Ne and F
4. D.Ar and F
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Answer: B
Q772023 · 6 Apr 2023 · Shift 1
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Loss of electron from hydrogen atom results in nucleus of $\sim 1.5 \times 1 0^{- 3} pm$ size. Reason R : Proton ( $H^{+}$ ) always exists in combined form. In the light of the above statements, choose the most appropriate answer from the options given below:
1. A.Both A and R are correct and R is the correct explanation of A
2. B.A is correct but R is not correct
3. C.A is not correct but R is correct
4. D.Both A and R are correct but R is NOT the correct explanation of A
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Answer: D
Q812023 · 6 Apr 2023 · Shift 1· Numerical answer
Number of bromo derivatives obtained on treating ethane with excess of $Br_{2}$ in diffused sunlight is ________
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Answer: 9
Q822023 · 6 Apr 2023 · Shift 1· Numerical answer
The wavelength of an electron of kinetic energy $4.50 \times 1 0^{- 29} J$ is ________ $\times 1 0^{- 5} m$ . (Nearest integer) Given : mass of electron is $9 \times 1 0^{- 31} kg$ , $h = 6.6 \times 1 0^{- 34} J s$
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Answer: 7
Q832023 · 6 Apr 2023 · Shift 1· Numerical answer
The number of species from the following which have square pyramidal structure is ________ $PF_{5}, BrF_{4}^{-}, IF_{5}, BrF_{5}, XeOF_{4}, ICl_{4}^{-}$
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Answer: 3
Q862023 · 6 Apr 2023 · Shift 1· Numerical answer
The value of $lo g K$ for the reaction $A ⇌ B$ at $298 K$ is ________. (Nearest integer) Given: $Δ H^{\circ} = - 54.07 kJ mol^{- 1}$ $Δ S^{\circ} = 10 J K^{- 1} mol^{- 1}$ (Take $2.303 \times 8.314 \times 298 = 5705$ )
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Answer: 10
Q662023 · 6 Apr 2023 · Shift 2
Which one of the following elements will remain as liquid inside pure boiling water?
1. A.Li
2. B.Br
3. C.Cs
4. D.Ga
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Answer: D
Q682023 · 6 Apr 2023 · Shift 2
Group-13 elements react with $O_{2}$ in amorphous form to form oxides of type $M_{2} O_{3}$ ( $M = element$ ). Which among the following is the most basic oxide?
1. A. $A l_{2} O_{3}$
2. B. $T l_{2} O_{3}$
3. C. $B_{2} O_{3}$
4. D. $G a_{2} O_{3}$
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Answer: B
Q722023 · 6 Apr 2023 · Shift 2
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: B
Q752023 · 6 Apr 2023 · Shift 2
The volume of $0.02 M$ aqueous $HBr$ required to neutralize $10.0 mL$ of $0.01 M$ aqueous $Ba (OH)_{2}$ is (Assume complete neutralization)
1. A. $7.5 mL$
2. B. $5.0 mL$
3. C. $10.0 mL$
4. D. $2.5 mL$
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Answer: C
Q782023 · 6 Apr 2023 · Shift 2
Structures of $BeC l_{2}$ in solid state, vapour phase and at very high temperature respectively are :
1. A.Polymeric, Dimeric, Monomeric
2. B.Dimeric, Polymeric, Monomeric
3. C.Polymeric, Monomeric, Dimeric
4. D.Monomeric, Dimeric, Polymeric
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Answer: A
Q792023 · 6 Apr 2023 · Shift 2
The group of chemicals used as pesticide is :
1. A.Dieldrin, Sodium arsinite, Tetrachloroethene
2. B.Aldrin, Sodium chlorate, Sodium arsinite
3. C.DDT, Aldrin
4. D.Sodium chlorate, DDT, PAN
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Answer: C
Q642023 · 1 Feb 2023 · Shift 1
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: D
Q702023 · 1 Feb 2023 · Shift 1
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: C
Q642023 · 31 Jan 2023 · Shift 1
$Nd^{2 +} =$
1. A. $4 f^{4} 6 s^{2}$
2. B. $4 f^{3}$
3. C. $4 f^{4}$
4. D. $4 f^{2} 6 s^{2}$
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Answer: C
Q682023 · 31 Jan 2023 · Shift 1
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: A
Q752023 · 31 Jan 2023 · Shift 1
Match List I with List II | List I | List II | | :--- | :--- | | A. $XeF_{4}$ | I. See-saw | | B. $SF_{4}$ | II. Square-planar | | C. $NH_{4}^{+}$ | III. Bent T-shaped | | D. $BrF_{3}$ | IV. Tetrahedral | Choose the correct answer from the options given below :
1. A.A - II, B - I, C - III, D - IV
2. B.A - II, B - I, C - IV, D - III
3. C.A - IV, B - I, C - II, D - III
4. D.A - IV, B - III, C - II, D - I
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Answer: B
Q632023 · 31 Jan 2023 · Shift 2
1. A.
2. B.
3. C.
4. D.
Show answer
Answer: B
Q762023 · 31 Jan 2023 · Shift 2
Given below are two statements : Statement I : $H_{2} O_{2}$ is used in the synthesis of Cephalosporin Statement II : $H_{2} O_{2}$ is used for the restoration of aerobic conditions to sewage wastes. 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.Statement I is correct but Statement II is incorrect
3. C.Both Statement I and Statement II are incorrect
4. D.Both Statement I and Statement II are correct
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Answer: D