300+ REAL TIME NEET Chemistry Objective Questions & Answers 2023

300+ TOP MCQs on Coordination Compounds and Answers

NEET Chemistry is the very imporatant paper in the Medical Entrance EXAM. So these NEET Chemistry MCQs with Answers for all Concepts as per the new syllabus. Practice daily with these NEET Chemistry objective questions on air pollution. NEET Chemistry Coordination Compounds Multiple Choice Questions

MCQs on Coordination Compounds :

1. When 0.1 mol CoCl3(NH3)5 is combined with excess AgNO3, then 0.2 mol AgCl is obtained. The conductivity of the solution suits the
(A) 1:3 electrolyte
(B) 1:1 electrolyte
(C) 3:1 electrolyte
(D) 1:2 electrolyte

Answer

Answer: (d)

2. A chelating agent has two or more than two donor atoms to bind to a single metal ion. Which of the following is not a chelating agent?
(A) Thiosulphato
(B) Oxalato
(C) Glycinato
(D) Ethane-1,2-diamine

Answer

Answer: (a)

3. IUPAC name of [Pt(NH₃)₂Cl(NO₂)] is
(A) Platinum diamminechloronitrite
(B) Chloronitrito-N-ammineplatinum (II)
(C) Diamminechloridonitrito-N-platinum (II)
(D) Diamminechloronitrito-N-plantinate (II)

Answer

Answer: (c)

4. In the complex [E(en)2(C2O4)]NO2 (where (en) is ethylenediamine) _______are the coordination number and the oxidation state of the element ‘E’ respectively.
(A) 6 and 2
(B) 2 and 2
(C) 4 and 3
(D) 6 and 3

Answer

Answer: (d)

5. The sum of coordination number and oxidation number of the metal M in the complex [M(en)₂(C₂O₄)]Cl (where (en) is ethylenediamine) is
(A) 9
(B) 6
(C) 7
(D) 8

Answer

Answer: (a)

6. Some salts containing two different metallic elements give test for only one of them in solution, such salts are
(A) double salts
(B) normal salts
(C) complex salts
(D) None of these

Answer

Answer: (c)

7. An example of a sigma bonded organometallic compound is
(A) Grignard reagent
(B) Ferrocene
(C) Cobaltocene
(D) Ruthenocene

Answer

Answer: (a)

8. Iron carbonyl, Fe(CO)₅ is
(A) Tetranuclear
(B) Mononuclear
(C) Dinuclear
(D) Trinuclear

Answer

Answer: (b)

9. The type of isomerism shown by the complex [CoCl₂(en)₂] is
(A) Geometrical isomerism
(B) Coordination isomerism
(C) Linkage isomerism
(D) Ionization isomerism

Answer

Answer: (a)

10. Which of the following elements do not form a complex with EDTA?
(A) Ca
(B) Mg
(C) Be
(D) Sr

Answer

Answer: (c)

300+ TOP MCQs on Chemical Bonding and Molecular Structure and Answers

MCQs on Chemical Bonding and Molecular Structure :

1. C-O bond length is minimum in
(A) CO₂
(B) CO₃^2-
(C) HCOO^–
(D) CO

Answer

Answer: (d)

2. Molecules are held together in a crystal by
(A) hydrogen bond
(B) electrostatic attraction
(C) Van der Waal’s attraction
(D) dipole-dipole attraction

Answer

Answer: (c)

3. Sp³d² hybridization is present in [Co(NH₃)₆³⁺], find its geometry
(A) octahedral geometry
(B) square planar geometry
(C) tetragonal geometry
(D) tetrahedral geometry

Answer

Answer: (a)

4. Find the molecule with the maximum dipole moment
(A) CH₄
(B) NH₃
(C) CO₂
(D) NF₃

Answer

Answer: (b)

5. MX₆ is a molecule with octahedral geometry. How many X – M – X bonds are at 180°?
(A) four
(B) two
(C) three
(D) six

Answer

Answer: (c)

6. Find the pair with sp²hybridisation of the central molecule
(A) NH₃ and NO₂^–
(B) BF₃ and NH₂^–
(C) BF₃ and NO₂^–
(D) NH₂^–and H₂O

Answer

Answer: (c)

7. The formal charge and P-O bond order in PO₄^3- respectively are
(A) 0.6, -0.75
(B) -0.75, 1.25
(C) 1.0, -0.75
(D) 1.25, -3

Answer

Answer: (b)

8. Which of the molecules does not have a permanent dipole moment?
(A) SO₃
(B) SO₂
(C) H₂S
(D) CS₂

Answer

Answer: (d)

9. pℼ – dℼ bonding is present in which molecule
(A) SO₃^2-
(B) CO₃^2-
(C) NO₃^–
(D) BO₃^3-

Answer

Answer: (a)

10. Which one has a pyramidal shape?
(A) SO₃
(B) PCl₃
(C) CO₃^2-
(D) NO₃^–

Answer

Answer: (b)

300+ TOP MCQs on Law Of Mass Action and Answers

MCQs on Law Of Mass Action :

1. Which of the following is not correct?
(A) the rate law is an experimental fact, but the law of mass action is theoretical
(B) the rate law is always different from the expression of the law of mass action
(C) the rate law is more informative than the law of mass action for the development of a mechanism
(D) the order of a reaction is equal to the sum of the powers of the concentration terms in the rate law.

Answer

Answer: (b)

2. The temperature coefficient of a reaction is 2. How many times the rate of reaction increases when the temperature is increased from 30^oC to 60^oC.
(A) 4 times
(B) 6 times
(C) 8 times
(D) 16 times

Answer

Answer: (c)

3. If a reaction with t_1/2 = 69.3 sec, has a rate constant 10^-2 per sec the order is
(A) zero
(B) 1
(C) 2
(D) 3

Answer

Answer: (b)

4. K for a zero-order reaction is 2 x 10^-2 mole/L/sec. If the concentration of reactant after 25 sec is 0.5M, the initial concentration must have been
(A) 0.5M
(B) 1.25M
(C) 12.5M
(D) 1.0M

Answer

Answer: (d)

5. A first-order reaction is 75% complete after 32 minutes. When was 50% of the reaction completed?
(A) 16min
(B) 8min
(C) 4min
(D) 32min

Answer

Answer: (a)

6. What is the half-life of a radioactive substance if 87.5% of any given amount of the substance disintegrate in 40 minutes?
(A) 160 min
(B) 10 min
(C) 20 min
(D) 13 min 20 sec

Answer

Answer: (d)

7. Half-life of 10g of radioactive substance is 10 days. The half-life of 20 g is
(A) 10 days
(B) 5 days
(C) 20 days
(D) 40 days

Answer

Answer: (a)

8. The chemical reactions in which reactants need a high amount of activation energy are generally
(A) fast
(B) slow
(C) very fast
(D) instantaneous

Answer

Answer: (b)

9. For a reaction A → Products the rate of reaction doubles when the concentration of A is increased by 4 times. The order of the reaction is
(A) 4
(B) 0
(C) 1/2
(D) 1

Answer

Answer: (c)

10. The number of atoms or molecules whose concentration alters during a chemical change is its
(A) molecularity
(B) order of reaction
(C) change in reaction
(D) none

Answer

Answer: (b)

300+ TOP MCQs on Covalent Bonding and Answers

MCQs on Covalent Bonding :

1. The octet rule is not valid for the molecule
(A) CO₂
(B) H₂O
(C) O₂
(D) CO

Answer

Answer: (d)

2. The nature of bonding in CCl₄ and CaH₂ is
(A) electrovalent in both CCl₄ and CaH₂
(B) covalent in CCl₄ and electrovalent in CaH₂
(C) electrovalent in CCl₄ and covalent in CaH₂
(D) covalent in both CCl₄ and CaH₂

Answer

Answer: (b)

3. CCl₄ is insoluble in water because
(A) CCl₄ is nonpolar and water is polar
(B) water is nonpolar and CCl₄ is polar
(C) water and CCl₄ are both polar
(D) none

Answer

Answer: (a)

4. Which is not an exception to octet rule?
(A) BF₃
(B) SnCl₄
(C) BeI₂
(D) ClO₂

Answer

Answer: (b)

5. The compound with the lowest melting point is
(A) AlF₃
(B) AlCl₃
(C) AlBr₃
(D) AlI₃

Answer

Answer: (d)

6. A solid substance is soft, has a low melting point and is a poor conductor of electricity. The substance is most likely
(A) an ionic solid
(B) network solid
(C) a metallic solid
(D) a molecular solid

Answer

Answer: (d)

7. By applying a Silver Nitrate solution to pure carbon tetrachloride
(A) a white precipitate soluble in ammonia is obtained
(B) a curdy precipitate insoluble in ammonia is obtained
(C) a pale yellow precipitate is obtained
(D) no precipitate is obtained

Answer

Answer: (d)

8. The rate of reaction of organic compounds is slow due to
(A) ionic bonding
(B) amphoteric nature
(C) covalent bonding
(D) coordinate covalent bonding

Answer

Answer: (c)

9. The self linking ability of carbon is called
(A) catenation
(B) sublimation
(C) hydrogenation
(D) carbonation

Answer

Answer: (a)

10. Almost 95% of compounds are of carbon because they can form
(A) single bonds
(B) double bonds
(C) triple bonds
(D) multiple bonds

Answer

Answer: (d)

300+ TOP MCQs on Haloalkanes and Haloarenes and Answers

MCQs on Haloalkanes and Haloarenes :

1. Which of the following undergoes nucleophilic substitution exclusively by S_N1 mechanism?
(A) Benzyl Chloride
(B) Ethyl chloride
(C) Chlorobenzene
(D) Isopropyl chloride

Answer

Answer: (a)

2. The increasing order of nucleophilicity would be?
(A) Cl^– < Br^– < I^–
(B) I^– < Cl^– < Br^–
(C) Br^– < Cl^–< F^–
(D) I^– < Br^– < Cl^–

Answer

Answer: (a)

3. Which of the following is most reactive towards SN1 reaction?
(A) C₆H₅C(CH₃)C₆H₅Br
(B) C₈H₅CH₂Br
(C) C₆H₅CH(C₆H₅)Br
(D) C₆H₅CH(CH₃)Br

Answer

Answer: (a)

4. CH₃CH₂CH₂Br + NaCN → CH₃CH₂CH₂CN + NaBr, will be fastest in
(A) ethanol
(B) methanol
(C) N, N-dimethylformamide
(D) Water

Answer

Answer: (c)

5. A Grignard reagent may be made by reacting magnesium with
(A) Methyl amine
(B) Diethyl ether
(C) Ethyl iodide
(D) Ethyl alcohol

Answer

Answer: (c)

6. C-Cl bond of chlorobenzene in comparison to C-Cl bond in methyl chloride is
(A) Longer and weaker
(B) Shorter and weaker
(C) Shorter and stronger
(D) Longer and stronger

Answer

Answer: (c)

7. A solution of (+) 2-chloro-2-phenylethane in toluene racemises slowly in the presence of a small amount of SbCl₅, due to the formation of
(A) carbanion
(B) carbene
(C) free radical
(D) carbocation

Answer

Answer: (d)

8. The decreasing order of boiling points of alkyl halides is
(A) RF > RCl > RBr > RI
(B) RBr > RCl > RCl > RF
(C) RI > RBr > RCl > RF
(D) RCl > RF > RI > RBr

Answer

Answer: (c)

9. Phosgene is commonly known as
(A) thionyl chloride
(B) carbonyl chloride
(C) carbon dioxide and phosphine
(D) phosphoryl chloride

Answer

Answer: (b)

10. The reaction of tert butyl bromide with sodium methoxide produces mainly
(A) isobutane
(B) isobutylene
(C) tert-butyl methyl ether
(D) sodium tert butoxide

Answer

Answer: (b)

300+ TOP MCQs on Structure of Atom and Answers

MCQs on Structure of Atom :

1. How many orbitals can have the following set of quantum numbers, n = 3, l = 1, m₁ = 0 ?
(A) 3
(B) 1
(C) 4
(D) 2

Answer

Answer: (b)

2. Electronic configuration of the outer shell of the element Gd with atomic number 64 is
(A) 4f⁴ 5d⁵ 6s¹
(B) 4f³ 5d⁵ 6s²
(C) 4f⁵ 5d⁴ 6s¹
(D) 4f⁷ 5d¹ 6s²

Answer

Answer: (d)

3. Maximum number of electrons in a subshell can be
(A) 4l + 2
(B) 4l – 2
(C) 2n²
(D) 2l + 1

Answer

Answer: (a)

4. The orientation of atomic orbitals depends on their
(A) spin quantum number
(B) magnetic quantum number
(C) azimuthal quantum number
(D) principal quantum number

Answer

Answer: (b)

5. A gas X has C_p and C_vratio as 1.4, at NTP 11.2 L of gas X will contain_______ number of atoms
(A) 1.2 × 10²³
(B) 3.01 × 10²³
(C) 2.01 × 10²³
(D) 6.02 × 10²³

Answer

Answer: (d)

6. Number of unpaired electrons in N²⁺
(A) 3
(B) 1
(C) 2
(D) 0

Answer

Answer: (b)

7. The excitation energy of a hydrogen atom from its ground state to its third excited state is
(A) 12.75 eV
(B) 0.85 eV
(C) 10.2 eV
(D) 12.1 eV

Answer

Answer: (a)

8. 3p orbital has _____ radial nodes
(A) three
(B) two
(C) one
(D) none

Answer

Answer: (c)

9. A 0.66 kg ball is moving with a speed of 100 m/s. Find its wavelength
(A) 6.6 × 10^-34m
(B) 6.6 × 10^-32m
(C) 1.0 × 10^-32m
(D) 1.0 × 10^-35m

Answer

Answer: (d)

10. Orbital angular momentum of p electrons is

Answer

Answer: (c)