Match the catalyst with the process:

Catalyst Process
(i) \(V_2O_5\) (a) The oxidation of ethylene to ethanal
(ii) \(TiCl_4 + Al(CH_3)_3\) (b) Polymerisation of alkynes
(iii) \(PdCl_2\) (c) Oxidation of \(SO_2\) in the manufacture of  \(H_2SO_4\)
(iv) Nickel complexes  (d) Polymerisation of ethylene

Which of the following is the correct matching of Catalyst & Process?

Options: (i) (ii) (iii) (iv)
1. c d a b
2. a b c d
3. a c b d
4. c a d b


1. (i)-(c), (ii)-(d), (iii)-(a), (iv)-(b)

2. (i)-(a), (ii)-(b), (iii)-(c), (iv)-(d)

3. (i)-(a), (ii)-(n), (iii)-(b), (iv)-(d)

4. (i)-(c), (ii)-(a), (iii)-(d), (iv)-(b)

Subtopic:  d-Block Elements- Properties & Uses |
 74%
Level 2: 60%+
NEET - 2019
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The most stable carbocation among the following is:

1.  2.
3. 4.
Subtopic:  Reaction Intermediates ; Preparation & Properties |
 69%
Level 2: 60%+
NEET - 2019
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The alkane that gives only one monochloro product on chlorination with \(\text{Cl}_2\) in presence of diffused sunlight is:

1. 2,2,-Dimethylbutane 2. Neopentane
3. n-Pentane 4. Isopentane
Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
 72%
Level 2: 60%+
NEET - 2019
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In the following reaction,

\(\mathrm{ CH_{3}C\equiv CH\xrightarrow[Red \ hot \ iron \ tube]{873 K} \ A}\)

The number of (σ) bonds present in the product (A) is:

1. 21  2. 9
3. 24 4. 18
Subtopic:  Aromatic Hydrocarbons - Benzene - Structure, Preparation & Chemical Reactions |
 55%
Level 3: 35%-60%
NEET - 2019
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Aluminium chloride in acidified aqueous solution forms a complex 'A'.
The formula of A and hybridisation state of Al in 'A' is respectively:

1. [Al(H2O)6]3+, sp3d2

2. [Al(H2O)4]3+, sp3

3. [Al(H2O)4]3+, dsp2

4. [Al(H2O)]3+, d2sp3

Subtopic:  Boron Family- Preparations, Properties & Uses |
 79%
Level 2: 60%+
NEET - 2019
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The compound among the following that used in cosmetic surgery is:

1. Silica

2. Silicates

3. Silicones

4. Zeolites

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 67%
Level 2: 60%+
NEET - 2019
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Identify the incorrect statement:

1. The scientific and technological process used for isolation of the metal from its ore is known as metallurgy
2. Minerals are naturally occurring chemical substances in the earth's crust
3. Ores are minerals that may contain a metal
4. Gangue is an ore contaminated with undesired materials
Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
Level 3: 35%-60%
NEET - 2019
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A compound "X", upon reaction with H2O, produces a colourless gas "Y" with a rotten fish smell.  Gas 'Y' is absorbed in a solution of CuSO4 to give Cu3P2 as one of the products. The compound 'X' will be:

1. Ca3P2

2. NH4Cl

3. As2O3

4. Ca3(PO4)2

Subtopic:  Group 15 - Preparation, Properties & Uses |
 68%
Level 2: 60%+
NEET - 2019
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Which of the following oxoacids of phosphorus shows the strongest reducing property?

1. H4P2O7
2. H3PO3
3. H3PO2
4. H3PO4
Subtopic:  Group 15 - Preparation, Properties & Uses |
 65%
Level 2: 60%+
NEET - 2019
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Identify the correct formula of 'oleum' from the following
1. H2S2O7 2. H2SO3
3. H2SO4 4. H2S2O8
Subtopic:  Group 16 - Preparation, Properties & Uses |
 84%
Level 1: 80%+
NEET - 2019
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