Category: NEET Chemistry Objective Questions

300+ TOP MCQs on First Law of Thermodynamics and Hess Law 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 First Law of Thermodynamics and Hess Law Multiple Choice Questions

MCQs on First Law of Thermodynamics and Hess Law :

1. The variations in enthalpy that can not be detected per calorimeter can be detected with the aid of
(A) Newton’s law
(B) Hess’s law
(C) Krebs law
(D) Ohm’s law

Answer

Answer: (b)

2. The energy required to sever a given covalent bond is named
(A) bond energy
(B) bond enthalpy
(C) bond dissociation energy
(D) all of above

Answer

Answer: (d)

3. Changes in enthalpy in an exothermic reaction is
(A) positive
(B) negative
(C) constant
(D) neutral

Answer

Answer: (b)

4. The first law of thermodynamics states that energy can not be
(A) created only
(B) destroyed only
(C) converted
(D) created and destroyed

Answer

Answer: (d)

5. Hess’s law states that a chemical reaction is independent of the route by which chemical reactions takes place while keeping the same
(A) initial conditions only
(B) final conditions only
(C) mid-conditions
(D) initial and final conditions

Answer

Answer: (d)

6. The standard enthalpy change of neutralization involves the reaction of an acid with an alkali to form 1 mol of
(A) water
(B) oxygen
(C) nitrogen
(D) anhydrous salt

Answer

Answer: (a)

7. The change in the energy between a chemical reaction and the surroundings at constant temperature is called
(A) enthalpy change
(B) enthalpy
(C) enthalpy profile
(D) dynamic enthalpy

Answer

Answer: (a)

8. To initiate a reaction the minimum energy which is required to break bonds is called
(A) bond energy
(B) activation energy
(C) breaking energy
(D) ionization energy

Answer

Answer: (a)

9. The standard condition for enthalpy changes are
(A) the pressure of 100 kPa
(B) temperature 298K
(C) normal physical state
(D) all of above

Answer

Answer: (d)

10. The application of law of thermodynamics to the enthalpy change was done by
(A) Newton
(B) Hess’s
(C) Lewis
(D) Sophocles

Answer

Answer: (b)

300+ TOP MCQs on Soil Pollution 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 Soil Pollution Multiple Choice Questions

MCQs on Soil Pollution :

1. Which of the following serves as an indicator of atmospheric pollution?
(A) fern
(B) liverworts
(C) hornworts
(D) epiphytic lichens

Answer

Answer: (d)

2. In 1984, the Bhopal gas tragedy took place because methyl isocyanate
(A) reacted with ammonia
(B) reacted with water
(C) reacted with DDT
(D) reacted with CO2

Answer

Answer: (b)

3. Negative soil pollution is
(A) reduction in soil productivity due to erosion and overuse
(B) reduction in soil productivity due to addition of pesticides and industrial wastes
(C) converting fertile land into harden land by dumping ash, sludge and garbage
(D) None of the above

Answer

Answer: (a)

4. Air pollution that occurs in sunlight is
(A) reducing smog
(B) acid rain
(C) oxidizing smog
(D) fog

Answer

Answer: (c)

5. The layer of atmosphere between 10km to 50km above the sea level is called as
(A) troposphere
(B) thermosphere
(C) stratosphere
(D) mesosphere

Answer

Answer: (c)

6. The concentration of dissolved oxygen in cold water can go up to
(A) 14 ppm
(B) 8 ppm
(C) 10 ppm
(D) 16 ppm

Answer

Answer: (c)

7. The quantity of DDT at each trophic level in the food chain
(A) decreases
(B) remains the same
(C) increases
(D) changes

Answer

Answer: (c)

8. Formation of London smog takes place in
(A) winter during day time
(B) summer during day time
(C) summer during morning time
(D) winter during morning time

Answer

Answer: (d)

9. Brewery and sugar factory waste alter the quality of a water body by increasing
(A) temperature
(B) turbidity
(C) pH
(D) COD and BOD

Answer

Answer: (d)

10. In a coal-fired power plant electrostatic precipitators are installed to control the emission of
(A) SO2
(B) NO2
(C) SPM
(D) CO

Answer

Answer: (c)

300+ TOP MCQs on Polymers 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 Polymers Multiple Choice Questions

MCQs on Polymers :

1. Nylon threads are made of
(A) polyester polymer
(B) polyamide polymer
(C) polyethylene polymer
(D) polyvinyl polymer

Answer

Answer: (b)

2. Which of the following is a branched polymer?
(A) low density polymer
(B) polyester
(C) high density polymer
(D) nylon

Answer

Answer: (a)

3. On the basis of mode of formation polymers can be classified:
(A) as addition polymers only
(B) as condensation polymers only
(C) as copolymers
(D) as addition and condensation polymers

Answer

Answer: (d)

4. The process of heat softening, moulding and cooling to rigidness can be repeated for which plastics?
(A) thermoplastics
(B) thermosetting plastics
(C) both (a) and (b)
(D) neither (a) nor (b)

Answer

Answer: (a)

5. The polymer used in making hair synthetic hair wigs is mage up of
(A) CH2=CHCl
(B) CH2=CHCOOCH3
(C) C6H5CH=CH2
(D) CH2=CH-CH=CH2

Answer

Answer: (a)

6. Which of the following monomers form biodegradable polymers?
(A) 3-hydroxybutanoic acid + 3-hydroxypentanoic acid
(B) Glycine + amino caproic acid
(C) ethylene glycol + phthalic acid
(D) both a and b

Answer

Answer: (d)

7. In addition polymer, monomer used is
(A) unsaturated compounds
(B) saturated compounds
(C) bifunctional saturated compounds
(D) trifunctional saturated compounds

Answer

Answer: (a)

8. Polymer formation from monomer starts by
(A) the condensation reaction between monomers
(B) the coordinate reaction between monomers
(C) conversion of monomer to monomer ions by protons
(D) hydrolysis of monomers

Answer

Answer: (a)

9. Which of the following statements is not correct for fibres?
(A) Fibres possess high tensile strength and high modulus
(B) Fibres impart crystalline nature
(C) Characteristic features of fibres are due to strong intermolecular forces like hydrogen bonding
(D) All are correct

Answer

Answer: (d)

10. Which of the following does not undergo additional polymerization?
(A) vinyl chloride
(B) butadiene
(C) styrene
(D) all of the above undergoes addition polymerizations

Answer

Answer: (d)

300+ TOP MCQs on States of Matter 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 States of Matter Multiple Choice Questions

MCQs on States of Matter :

1. A container with a pin-hole contains equal moles of H2(g) and O2(g). Find the fraction of oxygen gas escaped at the same time when one-fourth of hydrogen gas escapes
(A) 1/16
(B) 1/4
(C) 1/2
(D) 1/8

Answer

Answer: (a)

2. What are the conditions for gas like Carbon monoxide to obey the ideal gas laws?
(A) low temperature and low pressure
(B) low temperature and high pressure
(C) high temperature and low pressure
(D) high temperature and high pressure

Answer

Answer: (c)

3. If the temperature is doubled, the average velocity of a gaseous molecule increases by
(A) 4
(B) 1.4
(C) 2
(D) 2.8

Answer

Answer: (b)

4. Find the molecular mass of a gas that takes three times more time to effuse as compared to He with the same volume
(A) 9 u
(B) 64 u
(C) 27 u
(D) 36 u

Answer

Answer: (d)

5. At the same temperature, the average molar kinetic energy of N2 and CO is
(A) KE1 > KE2
(B) KE1 < KE2
(C) KE1 = KE2
(D) insufficient information given

Answer

Answer: (c)

6. Find the temperature at which the rate of effusion of N2 is 1.625 times to that of SO2 at 500℃
(A) 620℃
(B) 173℃
(C) 110℃
(D) 373℃

Answer

Answer: (a)

7. Find the change in the root mean square speed of the gas on raising the temperature from 27℃ to 927℃
MCQs on States of Matter for NEET 2
(A) becomes times
(B) gets doubled
(C) gets halved
(D) remains same

Answer

Answer: (b)

8. Find the relation between probable velocity, mean velocity and root mean square velocity
MCQs on States of Matter for NEET 1

Answer

Answer: (c)

9. If 1.204 x 1021 molecules of H2SO4 are removed from 392 mg of H2SO4, find the moles of H2SO4 left.
(A) 4 x 10-3
(B) 1.5 x 10-3
(C) 1.2 x 10-3
(D) 2 x 10-3

Answer

Answer: (d)

10. Find the fraction of the total pressure exerted by hydrogen if it is mixed with ethane in an empty container at 25℃
(A) 15/16
(B) 1/16
(C) 1/2
(D) 1

Answer

Answer: (a)