Chemical Bonding and Molecular Structure - Online solved Chemistry Test Series, Questions Answers for IITJEE, NEET, Entrance Exams


Chemistry online solved objective test series (MCQ) with hints helpful for preparing IITJEE, NEET, Engineering and Medical Entrance Exams, Dental, MBBS Admission Tests, Joint Entrance Exams, NEST and other competitions.

Practice Questions Answers (Objective Questions with Solutions)

Chemical Bonding and Molecular Structure
Syllabus :
Chemical combination; Kossel-Lewis Approach to Chemical Bonding; Lattice Energy; Covalent Bond; Octet Rule; Ionic and electrovalent Bond; Electrovalency; Covalency; Writing formula of an ionic compound; Coordinate Bond; Metallic Bond; Bond parameters - bond length, bond angle, bond enthalpy, bond order, resonance structures, polarity of bonds; The Valence Shell Electron Pair Repulsion (VSEPR) Theory; Valence Bond Theory; Geometry of molecules; Hybridisation; Molecular Orbital Theory; Bonding in some Homonuclear Diatomic Molecules; Hydrogen Bonding

Chemistry Solved Test Series: Chemical Bonding and Molecular Structure

MCQ Test Series – Set 3 (Q No.21-30)
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Question 21: The molecule that deviates from octet rule is –
a. CCl4
b. BF3
c. MgO
d. NCl3

Question 22: The sigma and π-bonds present in benzene ring are:
a. Three sigma and three pi
b. Six sigma and three pi
c. Six pi and three sigma
d. Nine sigma and three pi

Question 23: NH3 and BF3 combine readily because of the formation of:
a. A covalent bond
b. A hydrogen bond
c. A coordinate bond
d. An ionic bond

Question 24: Which of the following bonds has the highest energy?
a. S-S
b. O-O
c. Se-Se
d. Te-Te

Question 25: Which is not true for resonance?
a. Identical bonding
b. Identical arrangement of atoms
c. Same number of paired electrons
d. Structure with nearly same energies

Question 26: Which of the following contains both electrovalent and covalent bonds?
a. MgCl2
b. H2O
c. NH4Cl
d. None

Question 27: Which is a covalent compound?
a. RbF
b. MgCl2
c. CaC2
d. NH3

Question 28: Which one of the following species is planar and non-planar with two lone pairs of electrons on the central atom?
a. ClF3
b. XeF5-
c. PCl5
d. BeF5

Question 29: Hybridisation of carbon in CO is –
a. sp3
b. dsp2
c. sp
d. sp2

Question 30: The high boiling point of water is due to:
a. Its high specific heat
b. Hydrogen bonding between the molecules
c. Weak dissociation of water molecules
d. Its high dielectric constant


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Biology Solved Objective Questions, MCQ Test Series for NEET, AIPMT: Reproduction in Organisms

Biology solved objective questions, MCQ test series for preparing NEET, medical entrance exams, dental and MBBS Admission Tests, AIPMT, NEST and many other competitions.      
Solved objective questions MCQ from some of these topics covered (hints / solutions given at the end)
Reproduction in Organisms (Syllabus)
Reproduction, a characteristic feature of all organisms for continuation of species; Modes of reproduction – Asexual and sexual; Asexual reproduction; Modes-Binary fission, sporulation, budding, gemmule, fragmentation; vegetative propagation in plants.

Biology Solutions: Reproduction in Organisms

MCQ Test Series – Set 2 (Q. No. 11-20)
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Question 11: Isogametes are present in –
a. Fucus
b. Cladophora
c. Frog
d. Bird

Question 12: Which type of reproduction is common in multicellular animals with relatively simple organisations?
a. Binary fission
b. Parthenogenesis
c. Sexual reproduction
d. Asexual reproduction

Question 13: Vegetative propagation in mint occurs by –
a. Sucker
b. Runner
c. Offset
d. Rhizome

Question 14: The technique of obtaining large number of plantlets by tissue culture method is called –
a. Plantlet culture
b. Organ culture
c. Micropropagation
d. Macropropoagation

Question 15: Vegetative propagation in Pistia occurs by –
a. Stolen
b. Offset
c. Runner
d. Sucker

Question 16: Anisogamy means fusion of dissimilar gametes. It is found in –
a. Man
b. Earthworm
c. Pila
d. All of these

Question 17:Which of the following events occurs in the zygote during embryogenesis?
a. Cell division
b. Cell differentiation
c. Repeated meiotic divisions
d. Both a and b

Question 18:In grafting stock and scion ought to be joined –
a. Phloem to phloem
b. Xylem to xylem
c. Pith to pith
d. Cambium to cambium

Question 19: Find odd one out w.r.t. plants where grafting is performed –
a. Mango
b. Citrus
c. Apple
d. Sugarcane

Question 20:Male gametes in angiosperms are formed by the division of:
a. Vegetative cell
b. Microspore mother cell
c. Microspore
d. Generative cell

India Study Solution - Biology Objective Questions with Solutions
biology MCQ Test Series: reproduction in organisms
Solutions of Biology Test Series Questions – Set 2 (Q. No. 11 – 20)
Answer 11: (b).   Answer 12: (d).   Answer 13: (a).   Answer 14: (c).   Answer 15: (b).   Answer 16: (d).   Answer 17: (d).   Answer 18: (d).   Answer 19: (d).   Answer 20: (d).

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Free online solved Test Series on Units, Dimensions, Measurements and Error Analysis - Physics questions answers for IITJEE, NEET

Physics MCQ Test Series with solutions (practice questions answers) on “Units, Dimensions, Measurements and Error Analysis” to prepare online for IITJEE, AIPMT, NEET, Medical and Engineering Joint Entrance Exams and other competitive examinations.

Physics Guide for NEET, IITJEE: Units, Dimensions, Measurements and Error Analysis (Syllabus)

Syllabus Topics: Units and Dimensions. International System of Units - SI, Fundamental and Derived Units. Dimensional Formulae and Dimensional Equations. Dimensional Analysis and its Applications. Significant figures and rounding off the numbers. Measurement of length, mass, and time. Accuracy, Precision of Instruments and error analysis. 

Physics: Units, Dimensions, Measurements and Error Analysis

MCQ Test Series – Set 3 (Q No 21-30)

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Question 21: In which of the following numerical values, all zeroes are significant?
a. 0.2020    b. 20.2    c. 20.20    d. none of these

Question 22: The damping force on an oscillator is directly proportional to the velocity. The units of the constant of proportionality are
a. kgs-1          b.kgs
c. kgms-1    d. kgms-2

Question 23: In an experiment the angles are required to be measured using an instrument. 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. If the smallest division of the main scale is half-a-degree (0.5 , then the least count of the instrument is:
a. half minute     b. one degree
c. half degree     d. one minute

Question 24: Which pair do not have equal dimensions?
a. Energy and torque                                         b. Force and impulse   
c. Angular momentum and Planck’s constant   d. Elastic modulus and pressure

Question 25: Pick out the right choice S2 = at4. Here S is measured in meters, t in second. Then the unit of ‘a’ is-
a. ms-2     b. ms2
c. m2s4       d. m2s-4

Question 26: With usual notation, the following equation, said to give the distance covered in the nth second, i.e., Sn = u + a {(2n – 1)/2}  is:
a. numerically correct only     b. dimensionally correct only     c. both dimensionally and numerically only     d. neither numerically nor dimensionally correct 

Question 27: If the units of ML are doubled then the unit of kinetic energy will become –
a. 8 times    b. 16 times
c. 4 times    d. 2 times

Question 28:The values of two resistors are (5.0 ± 0.2) kΩ and (10.0 ± 0.1) kΩ. What is the percentage error in the equivalent resistance when they are connected in parallel?
a. 2%      b. 5%
c. 7%      d. 10%

Question 29:The dimensions of RC is
a. Square of time   b. Square of inverse time
c. Time                  d. Inverse time

Question 30: The velocity of a particle depends upon time according to the relation v = αt + b/(t+g). The dimensions of α, β and  will be -
a. LT-2, L, T      b. L, T, LT-2
c. T, L, LT-2      d. LT-1, L, T


Units, Dimensions, Measurements and Error Analysis - More Objective Questions 

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