Chemistry Solved Objective Test Series: Chemical Bonding and Molecular Structure for NEET, IITJEE

Chemistryonline 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.

Chemistry Test Series (MCQ Practice Questions)

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 Test Series: Chemical Bonding and Molecular Structure

MCQ Test Series – Set 2 (Q. No.11-20)

Question 11: The attraction that non-polar molecules have for each other is primarily caused by –

a. Van der Waal’s forces

b. Difference in electronegativities

c. Hydrogen bonding

d. High ionisation energy

Question 12: The number of types of bonds between two carbon atoms in calcium carbide is:

a. One sigma, one pi

b. Two sigma, one pi

c. Two sigma, two pi

d. One sigma, two pi

Question 13: Which of the following species is diamagnetic in nature?

a. He₂⁺

b. H₂

c. H₂⁺

d. H₂^-

Question 14: Which of the following molecules has the highest bond order?

a. O₂^-

b. O₂

c. O₂⁺

d. O₂^2-

Question 15: Molten sodium chloride conducts electricity due to the presence of –

a. Free electrons

b. Free ions

c. Free molecules

d. Free atoms

Question 16: Which of the following have low lattice energy?

a. Cs-F

b. Cs-Cl

c. Cs-Br

d. Cs-I

Question 17: Which one is electron deficient compound?

a. ICl

b. BCl₃

c. NH₃

d. PCl₃

Question 18: Which of the following is least ionic?

a. BeI₂

b. BeCl₂

c. BeBr₂

d. BeF₂

Question 19: The shape of sulphate ion is –

a. Tetrahedral

b. Square planar

c. Trigonal

d. Trigonal planar

Question 20: Which of the following has pπ – dπ bonding?

a. NO₃^-

b. SO₃^2-

c. BO₃^3-

d. CO₃^2-

^­View Hints / Answers

Chemical Bonding and Molecular Structure - More Objective Test Series Questions with Answers

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Chemistry Objective Test Questions with Solutions: Chemical Bonding and Molecular Structure

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

India Study Solution Chemistry Test Series (MCQ Practice Questions)

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 Test Series: Chemical Bonding and Molecular Structure

MCQ Test Series – Set 1 (Q. No. 1-10)

Question 1: Tendency of I^-, Br^-, Cl^- and F^- to be oxidised is in order:

a. I^- > Br^- > Cl^- > F^-

b. I^- < Br^- < Cl^- < F^-

c. I^- < Cl^- > F^- > Br^-

d. I^- = Br^- > Cl^- = F^-

Question 2: Some statements about valence bond theory are given below –

a. The strength of bond depends upon extent of overlapping

b. The theory explains the directional nature of covalent bond

c. According to this theory oxygen molecule is paramagnetic in nature

(1) All are correct   (2) Only a and c   (3) Only a and b are correct   (4) All are wrong

Question 3: Which has maximum covalent character?

a. NaCl

b. SiCl₄

c. AlCl₃

d. MgCl₂

Question 4: The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is –

a. 2

b. 3

c. 4

d. 1

Question 5: The correct order regarding the electronegativity of hybrid orbitals of carbon is –

a. sp < sp² < sp³

b. sp > sp² < sp³

c. sp > sp² > sp³

d. sp < sp² > sp³

Question 6: The electronegativity of O, F, N, Cl and H are 3.5, 4.0, 3.2, 3.0 and 2.1 respectively. The strongest bond will be:

a. F-O

b. O-Cl

c. N-H

d. O-H

Question 7: When two atoms of chlorine combine to form one molecule of chlorine gas, the energy of the molecule is –

a. Greater than that of separate atoms

b. Equal to that of separate atoms

c. Lower than that of separate atoms

d. None of these

Question 8: Which of the following species is not correctly matched with its geometry according to the VSEPR theory?

a. BrF₆⁺ → octahedral

b. SnCl₅^- → trigonal bipyramidal

c. ClF₂^- → linear

d. IF₄⁺ → T-shape

Question 9: Variable valency is shown by:

a. s-block elements

b. d-block elements

c. p- and d-block elements

d. all elements

Question 10: Covalent compounds are generally soluble in –

a. Polar solvents

b. Non-polar solvents

c. Concentrated acids

d. All solvents

View / Download Answers (Hints) [.pdf]

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NEET 2018 questions in regional languages

25-Oct-2017

The center communicated its decision to representatives of all the states in a video conference on 16th Oct'17 that from 2018 onwards UG medical (MBBS) aspirants will have the option to get question papers of NEET in regional languages too along with in English.

However, there seems to be still some dilemma of acceptance by some of the states in this regard.

Bengal government's action for NEET 2018

Bengal has dropped the plan to hold a separate medical entrance examination after the center said the common national entrance exam's regional language papers next year would be the translation of English version.

The national entrance-cum-eligibility test (NEET) this year sparked allegations that the NEET Question paper in English was easier than some of the regional language ones, including Bengali.

However according to Bengal education minister, the state is exploring all possibilities to keep medical aspirants of Bengal out of the ambit of common test for another year. He said the main intention behind this is to give the center at least a year to see whether they can develop a mechanism so that the students particularly from rural areas studying mostly in state board don't face problems which had happened in Tamil Nadu in NEET 2017.

The director of Bengal medical education Debasish Bhattacharya said he had written to CBSE board, which conducts NEET, on May 8 flagging the disadvantages students from Bengal had faced, the Union HRD minister Prakash Javadekar, had said in July that NEET question papers in regional languages would be a translation of the NEET Question paper in English.

According to the Bengal higher education departmental sources, the four students from the state who figured among the top 50inNEET 2017 were all from CBSE board.

Tamil Nadu government's action for NEET 2018

This would be important to mention here according to our sources, till now it is not clear what Tamil Nadu government would do following canter’s video conference of 16th Oct'17. Along with Bengal and few other states a representative of TN had taken part in that video conference.

Similar Articles 

• CBSE to ensure uniformity of NEET questions
• CBSE announced tentative dates for IITJEE Main and JEE Advanced 2018 

CBSE announced tentative dates for IITJEE Main and JEE Advanced 2018

The offline version of IIT JEE Main 2018 will be held on April 8 next year, the Central Board of Secondary Education (CBSE) has announced.

It has not declared the dates for the computer-based version that only a few among the 12 lakh candidates take.

The IIT JEE Advanced 2018, to be conducted by IIT Kanpur, will be held on May 20. It will be an entirely computer-based test. 

Also read: IITJEE Advanced to become totally computer based from 2018

The CBSE has also asked its affiliated schools not to pass off students of unaffiliated schools as their own for the board exams. 

Breathing and Respiration, Exchange of Gases - Biology Objective Questions for NEET-UG, AIPMT, MBBS and Dental admission tests

Breathing and Respiration, Exchange of Gases (NEET-UG, NEST, MBBS, Dental admission Tests - Syllabus): Respiratory organs in animals (recall only); Respiratory system in humans; Mechanism of breathing and its regulation in humans-Exchange of gases, transport of gases and regulation of respiration Respiratory volumes; Disorders related to respiration-Asthma, Emphysema, Occupational respiratory disorders.

HUMAN PHYSIOLOGY (Breathing and Respiration, Exchange of Gases)

Biology Objective Type Theoretical Questions - TQ 2 (Q. No. 31-60)

For Q. No. 1-30 click : Biology Objective Very Short Answer Type Questions - Breathing and Respiration, Exchange of Gases
For Q. No. 61-67 click: Fully solved free online Biology objective questions on Breathing and Respiration, Exchange of Gases for NEET-UG, AIPMT, NEST, MBBS admission tests 
For Q. No. 61-67 click: Breathing and Respiration, Exchange of Gases - long answer questions for Entrance Exams and Admission Tests

Very Short Answer Type Questions (Answers / Solutions given below)

Question: 31: Among all the respiratory volumes, which has lowest value?

Question: 32: Which is the primary site for exchange of gases?

Question: 33: How are gases like O₂ and CO₂ exchanged in our body?

Question: 34: Why is O₂ gas passed from atmospheric air to alveoli?

Question: 35: Which epithelium lines the alveoli?

Question: 36: Which gas, out of O₂ and CO₂ is more soluble?

Question: 37: What is the thickness of diffusion membrane?

Question: 38: How many layers form the diffusion membrane?

Question: 39: Why is CO₂ gas transferred from alveoli to atmospheric air?

Question: 40: Which gas has higher partial pressure in tissues?

Question: 41: What is the medium of transport for O₂ and CO₂?

Question: 42: What is the percentage of O₂ transported in bound form?

Question: 43: What is oxygen-dissociation curve?

Question: 44: Which compound is formed when O₂ binds with Hb?

Question: 45: What is the shape of O₂-dissociation curve for haemoglobin?

Question: 46: Write any two factors that are favourable for the formation of oxyhaemogloin.

Question: 47: Which compound is formed when CO₂ binds with Hb?

Question: 48: What are the conditions responsible for more binding of CO₂ with Hb in tissues?

Question: 49: What is the percentage of CO₂ transported as bicarbonate ions?

Question: 50: How much CO₂ is delivered to the alveoli by every 100 ml of deoxygenated blood?

Question: 51: Which is the main centre of brain that regulates the respiration rate?

Question: 52: Where is respiratory rhythm centre located in brain?

Question: 53: What is the location of pneumotaxic centre in brain?

Question: 54: Where is the chemosensitive area located in the brain, which regulates the respiration?

Question: 55: To which substances, chemosensitive area is highly sensitive?

Question: 56: A person faces difficulty in breathing, produces sound during breathing. Name the disease from which he suffers.

Question: 57: What is the main cause of Emphysema?

Question: 58: What happens to bronchi and bronchioles during asthma?

Question: 59: Why is surface area for exchange of gases deceased during Emphysema?

Question: 60: Give two examples of occupational respiratory disorders.

India Study Solution

Biology Solutions: Breathing and Respiration, Exchange of Gases

Solutions of Biology Objective Very Short Answer Type Questions - TQ 2 (Q. No. 31-60)

http://www.indiastudysolution.com

Solution-31: Tidal volume (TV). Solution-32: Alveoli. Solution-33: By simple diffusion based on pressure gradient.Solution-34: It is because the pO₂ in atmospheric air is higher, i.e., 159 mm Hg than in alveoli, i.e., 104 mm Hg. Solution-35: Squamous epithelium. Solution-36: CO₂ is more soluble, 20-25timeshigher than that of O_2. Solution-37: 0.2mm. Solution-38 : 3. Solution-39: It is because the pCO₂ in alveoli is higher, i.e., 40 mm Hg than in atmospheric air, i.e., 0.3 mm Hg. Solution-40: CO₂. pCO₂is higher than pO₂ in tissues. Solution-41: Blood. Solution-42: About 97%. Solution-43: A graphic representation between the relationship between pO₂ and percentage saturation of Hb with O₂. Solution-44:  Oxyhaemoglobin. Solution-45:  It is sigmoid or ‘S’ shaped. Solution-46: High pO₂ and low pCO₂. Solution-47: Carbaminohaemoglobin. Solution-48: High pCO₂ and low pO₂. Solution-49: About 70%. Solution-50: 4 ml. Solution-51:  Respiratory rhythm centre. Solution-52: Medulla oblongata of hindbrain. Solution-53: Pons region of hindbrain. Solution-54:  It is located adjacent to the respiratory rhythm centre in the medulla region. Solution-55: CO₂ and H⁺ ions. Solution-56: Asthma. Solution-57: Excessive cigarette smoking. Solution-58: Inflammation occurs in bronchi and bronchioles. Solution-59: It is decreased due to breakdown of alveolar walls. Solution-60: Silicosis and asbestosis.

BREATHING and RESPIRATION - More Objective Questions with Answers

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Biology Objective Very Short Answer Type Questions - Breathing and Respiration, Exchange of Gases

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Below you are going to get a series of some very important, carefully selected basic and advanced Very Short type, Medium and then Long Answer type questions followed by our very popular result-oriented India Study Solution MCQ Test Series with their answers and solutions from Biology Chapter - HUMAN PHYSIOLOGY (Breathing and Respiration, Exchange of Gases).

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Breathing and Respiration, Exchange of Gases (NEET-UG, NEST, Medical Entrance Exam Syllabus): Respiratory organs in animals (recall only); Respiratory system in humans; Mechanism of breathing and its regulation in humans-Exchange of gases, transport of gases and regulation of respiration Respiratory volumes; Disorders related to respiration-Asthma, Emphysema, Occupational respiratory disorders.

HUMAN PHYSIOLOGY (Breathing and Respiration, Exchange of Gases)
India Study Solution Biology Objective Type Theoretical Questions

TQ 1 (Q. No. 1-30)

For Q.No. 31-60 click: Breathing and Respiration, Exchange of Gases - Biology Objective Questions for NEET-UG, AIPMT, MBBS and Dental admission tests  

For Q. No. 61-67 click:  Breathing and Respiration, Exchange of Gases - Short answer Biology objective questions for NEET-UG, AIPMT, MBBS admission tests and similar exams  
For Q. No. 68-71 click:  Breathing and Respiration, Exchange of Gases - long answer questions for Entrance Exams and Admission Tests    

Very Short Answer Type Questions (Link for Hints and Solutions given at the end)

Question: 1: Write the name of main respiratory organ in human beings.

Question: 2: Name two animals which carry on anaerobic respiration.

Question: 3: Name the cavities which are separated by palate.

Question: 4: Give the name of the partition between thorax and abdomen.

 Question: 5: Which is the respiratory organ of earthworm?

Question: 6: Write the term used for respiratory organs of insects.

Question: 7: Name two group of animals that respire via gills.

Question: 8: Write the respiratory organ of tadpole larva of frog.

Question: 9: What is the main characteristic of gills?

Question: 10: Which group of animals have well-developed respiratory system?

Question: 11: Name the organ which helps in sound production.

Question: 12: Why is trachea surrounded by cartilaginous rings?

Question: 13: In which part nasal chamber opens?

Question: 14: What is the role of pleural membranes?

Question: 15: Which is the first step of respiration?

Question: 16: What is glottis?

Question: 17: What happens to the volume of thoracic cavity when muscle fibres of diaphragm contract?

Question: 18: What its the rate of breathing in a normal healthy man?

Question: 19: What is the effect on the volume of pulmonary cavity when volume of thoracic cavity increases?

Question: 20: What happens to ribs and sternum during contraction of external intercostal muscles?

Question: 21: Name the additional muscles which help in increasing the strength of breathing.

Question: 22: What happens when the pressure within the pulmonary cavity is more than the atmospheric air?

Question: 23: What its the value of expiratory reserve volume (ERV)?

Question: 24: Define tidal volume.

Question: 25: What is respiratory capacity?

Question: 26: What is the value of tidal volume in a normal healthy man per minute?

Question: 27: What is respiratory volume?

Question: 28: What are the factors on which vital capacity of lungs depend?

Question: 29: How can you estimate the value of functional residual capacity (FRC)?

Question: 30: In which of the following vital capacity is maximum: Athlete, Old man, Woman and Asthmatic.

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