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NEET Practice Test - 25 - NEET MCQ


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30 Questions MCQ Test - NEET Practice Test - 25

NEET Practice Test - 25 for NEET 2024 is part of NEET preparation. The NEET Practice Test - 25 questions and answers have been prepared according to the NEET exam syllabus.The NEET Practice Test - 25 MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for NEET Practice Test - 25 below.
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NEET Practice Test - 25 - Question 1

The number of antibonding electron pairs inO2-2 molecular ions on the basis of molecular orbital theory are (at. no. O = 8)

Detailed Solution for NEET Practice Test - 25 - Question 1
O2-2 = 18e-

NEET Practice Test - 25 - Question 2

The transition metals have a less tendency to form ions due to:

Detailed Solution for NEET Practice Test - 25 - Question 2
All statements are correct.
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NEET Practice Test - 25 - Question 3

Brine is electrolysed by using inert electrodes.

The reaction at anode is ________.

NEET Practice Test - 25 - Question 4

Schotten-Baumann reaction is a reaction of phenols with:

NEET Practice Test - 25 - Question 5

According to the adsorption theory of catalysis, the speed of the reaction increases because

Detailed Solution for NEET Practice Test - 25 - Question 5
Adsorption lowers the activation energy.
NEET Practice Test - 25 - Question 6

Consider the following complex [Co(NH3)5CO3]ClO4.The coordination number, oxidation number, number of d-electrons and number of unpaired d-electrons on the metal are respectively

Detailed Solution for NEET Practice Test - 25 - Question 6
[Co(NH3)JCO3]CIO4 Six monodentate ligands are attached to Co hence C. N. of Co = 6;

O. N. = x + 5 x (0) +1 x (-2) +1 x (-1) = 0

∴ x = + 3 ; electronic configuration of Co3+[Ar] 3d64s0

hence the number of d electrons is 6 : All d electrons are paired due to strong ligands hence unpaired electrons zero.

NEET Practice Test - 25 - Question 7

Match the columns

NEET Practice Test - 25 - Question 8

Teflon, styron and neoprene are all :

NEET Practice Test - 25 - Question 9

The reducing power of divalent species decreases in the order

Detailed Solution for NEET Practice Test - 25 - Question 9
The stability of + 2O .S . follows the order

Pb2+ > Sn2+ > Ge2+

Hence reducing power Ge > Sn > Pb

NEET Practice Test - 25 - Question 10

Prevention of corrosion of iron by Zn coating is called:

Detailed Solution for NEET Practice Test - 25 - Question 10
Galvanization
NEET Practice Test - 25 - Question 11

RNA is different from DNA because RNA contains

NEET Practice Test - 25 - Question 12

Beryllium shows a diagonal relationship with aluminium. Which of the following similarity is incorrect :

Detailed Solution for NEET Practice Test - 25 - Question 12
The Be (OH)2 and Al (OH)3 are amphoteric in nature.
NEET Practice Test - 25 - Question 13

The fatty acid which shows reducing property is

Detailed Solution for NEET Practice Test - 25 - Question 13
Formic acid has aldehyde grouping

NEET Practice Test - 25 - Question 14

When cyclohexane is poured on water, it floats, because

NEET Practice Test - 25 - Question 15

(n – 1)d10 ns2 is the general electronic configuration of

NEET Practice Test - 25 - Question 16

Structurally biodegradable detergent should contain

Detailed Solution for NEET Practice Test - 25 - Question 16
Linear alkylbenzene sulphonates (LAB) carrying phenyl chains at secondary positions are biodegradable.
NEET Practice Test - 25 - Question 17

Which of the following crystals does not exhibit Frenkel defect?

Detailed Solution for NEET Practice Test - 25 - Question 17
KBr does not exhibit Frenkel defects.
NEET Practice Test - 25 - Question 18

Which of the following statements about low density polythene is FALSE?

Detailed Solution for NEET Practice Test - 25 - Question 18
High density polythene is used in the manufacture of housewares like buckets, dustbins, bottles, pipes etc. Low density polythene is used for insulating electric wires and in the manufacture of flexible pipes, toys, coats, bottles etc.
NEET Practice Test - 25 - Question 19

Consider the following reaction :

(i) Rate of reaction with respect to NH 3 will be

(ii) For the given reaction

(iii) For the given reaction

(iv) For the given reaction, =

Which of the following are the correct statements.

Detailed Solution for NEET Practice Test - 25 - Question 19
For the given reaction

=

NEET Practice Test - 25 - Question 20

The important antioxidant used in food is:

Detailed Solution for NEET Practice Test - 25 - Question 20
BHT is the important antioxidant used in food.
NEET Practice Test - 25 - Question 21

Geometrical isomerism is not shown by

Detailed Solution for NEET Practice Test - 25 - Question 21
The condition for geometrical isomerism is

NEET Practice Test - 25 - Question 22

Which of the following statements are correct ?

(i) Ionic product of water (Kw) = [H+] [OH] = 10–14M2

(ii) At 298K [H+] = [OH] = 10–7

(iii) Kw does not depends upon temperature

(iv) Molarity of pure water = 55.55M

Detailed Solution for NEET Practice Test - 25 - Question 22
Kw depends upon temperature as it is an equilibrium constant.
NEET Practice Test - 25 - Question 23

Consider the following reaction at 1000°C

A.

B.

Choose the correct statement at 1000°C

NEET Practice Test - 25 - Question 24

Match List I (Reaction) with List II (Reagent) and select the correct answer using the codes given below the lists:

NEET Practice Test - 25 - Question 25

Which one of t h e following is the correct statement?

Detailed Solution for NEET Practice Test - 25 - Question 25
The correct formula of inorganic benzene i s B3N3H6 so (a) is an incorrect statement.

Boric acid is a lewis acid so (b) is an incorrect statement.

The coordination number exhibited by beryllium is 4 and not 6 so statement (c) is incorrect.

Both BeCl2 and AlCl3 exhibit bridged structures in solid state so (d) is the correct statement.

NEET Practice Test - 25 - Question 26

Values of dissociation constant, Ka are given as follows :

Correct order of increasing base strength of the base CN, F and NO2- will be :

Detailed Solution for NEET Practice Test - 25 - Question 26
Higher the value of Ka lower will be the value of pKa i.e. higher will be the acidic nature. Further since CN-, F- and NO2- are conjugate base of the acids HCN, HF and HNO2 respectively hence the correct order of base strength will be

F- < NO2-< CN-

( stronger the acid weaker will be its conjugate base)

NEET Practice Test - 25 - Question 27

Which of the following statements is not correct regarding aniline?

Detailed Solution for NEET Practice Test - 25 - Question 27
Aniline is insoluble in water, because its -NH2 group can’t form H- bond with water due to the bulky phenyl group.
NEET Practice Test - 25 - Question 28

Aromatic character of benzene is proved by:

NEET Practice Test - 25 - Question 29

The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 m/s is approximately

Detailed Solution for NEET Practice Test - 25 - Question 29

= 1.1 x 10-33m

NEET Practice Test - 25 - Question 30

What are these

and are

Detailed Solution for NEET Practice Test - 25 - Question 30
The two structures involve only movement of electrons and not of atoms or groups, hence these are resonating structures.
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