Category: NEET Chemistry Objective Questions

300+ TOP MCQs on Water Or Hydride Of Oxygen 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 Water Or Hydride Of Oxygen Multiple Choice Questions

MCQs on Water Or Hydride Of Oxygen :

1. Water is oxidised to oxygen by
(A) H2O2
(B) KMnO4
(C) ClO2
(D) fluorine

Answer

Answer: (d)

2. The H-O-H bond angle in a water molecule is about
(A) 90o
(B) 105o
(C) 135o
(D) 180o

Answer

Answer: (b)

3. The action of water or dilute mineral acids on metals can give
(A) tritium
(B) dihydrogen
(C) trihydrogen
(D) mono hydrogen

Answer

Answer: (b)

4. Reaction of potassium with water is
(A) hydrolysis
(B) absorption
(C) exothermic
(D) Endothermic

Answer

Answer: (c)

5. Water softening by Clarke’s process uses
(A) potash alum
(B) calcium bicarbonate
(C) calcium hydroxide
(D) sodium bicarbonate

Answer

Answer: (c)

6. A variety of water which contains soluble salts of Ca and Mg is known as
(A) soft water
(B) heavy water
(C) conductivity water
(D) hard water

Answer

Answer: (d)

7. Oxygen does not react with
(A) Na
(B) P
(C) Cl
(D) S

Answer

Answer: (c)

8. The gas O3 (ozone) cannot oxidise
(A) KI
(B) FeSo4
(C) KMnO4
(D) K2MnO4

Answer

Answer: (c)

9. The molarity of pure water at 277K is
(A) 1M
(B) 5M
(C) 55.5M
(D) 2.5M

Answer

Answer: (c)

10. Which one of the following substances has the highest proton affinity?
(A) NH3
(B) H2O
(C) PH3
(D) H2S

Answer

Answer: (a)

300+ TOP MCQs on Oxidation Number and Oxidation State 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 Oxidation Number and Oxidation State Multiple Choice Questions

MCQs on Oxidation Number and Oxidation State :

1. Number of moles of K2Cr2O7 reduced by 1 mole of Sn2+ is
(A) 1/6
(B) 1/3
(C) 2/3
(D) 1

Answer

Answer: (b)

2. The oxidation number of carbon in CH2Cl2 is
(A) 0
(B) 2
(C) 3
(D) 5

Answer

Answer: (a)

3. Which of the following will not be oxidised by O3?
(A) KI
(B) FeSO4
(C) KMnO4
(D) K2MnO4

Answer

Answer: (c)

4. The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution is
(A) +4
(B) +6
(C) +2
(D) +3

Answer

Answer: (d)

5. What products are expected from the disproportionation reaction of hypochlorous acid?
(A) HCl and Cl2O
(B) HCl and HClO3
(C) HClO3 and Cl2O
(D) HClO2 and HClO4

Answer

Answer: (b)

6. Which of the following elements does not show disproportionation tendency?
(A) Cl
(B) Br
(C) F
(D) I

Answer

Answer: (c)

7. What is the oxidation number of chlorine in HClO4?
(A) +3
(B) +5
(C) +7
(D) +8

Answer

Answer: (c)

8. The oxidation state of each Cl in CaOCl2 is
(A) 0
(B) +1
(C) -1
(D) +1, -1

Answer

Answer: (d)

9. The products formed when an aqueous solution of NaBr is electrolysed in a cell having inert electrodes are
(A) Na and Br2
(B) Na and O2
(C) H2, Br2, NaOH
(D) H2 and O2

Answer

Answer: (c)

10. Number of moles of MnO4– required to oxidise one mole of ferrous oxalate completely in the acidic medium will be
(A) 7.5 moles
(B) 0.2 moles
(C) 0.6 moles
(D) 0.4 moles

Answer

Answer: (c)

300+ TOP MCQs on Solutions Chemistry 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 Solutions Chemistry Multiple Choice Questions

MCQs on Solutions Chemistry :

1. The mole fraction of the solute in one molal aqueous solution is
(A) 0.009
(B) 0.018
(C) 0.027
(D) 0.036

Answer

Answer: (b)

2. 5 cm3 of acetone is added to 100 cm3 of water, the vapour pressure of water over the solution will be
(A) equal to the vapour pressure of pure water.
(B) less than the vapour pressure of pure water.
(C) greater than the vapour pressure of pure water.
(D) very large.

Answer

Answer: (b)

3. The density of a solution prepared by dissolving 129g of urea in 1000g of water is 1.15g/ml. The molarity of this solution is
(A) 1.78M
(B) 1.02M
(C) 2.05M
(D) 0.50M

Answer

Answer: (c)

4. If at a certain temperature the vapour pressure of pure water is 25 mm Hg and that of a very dilute aqueous urea solution is 24.5 mm Hg, the molality of the solution is:
(A) 0.02
(B) 1.2
(C) 1.11
(D) 0.08

Answer

Answer: (c)

5. The relationship between osmotic pressure at 273K when 10g glucose (P1), 10g urea (P2) and 10g sucrose (P3) are dissolved in 250ml of water is
(A) P1 > P2 > P3
(B) P3 > P1 > P2
(C) P2 > P1 > P3
(D) P2 > P3 > P1

Answer

Answer: (c)

6. Two liquids X and Y form an ideal solution. At 300K vapour pressure of the solution containing 1mol of X and 3 mol of Y is 550 mm Hg. At the same temperature, if 1 mol of Y is further added to this solution, the vapour pressure of the solution increases by 10 mm Hg. Vapour pressure of X and Y in the pure states will be respectively
(A) 300 and 400
(B) 400 and 600
(C) 500 and 600
(D) 200 and 300

Answer

Answer: (b)

7. Mixing up equal volumes of 0.1M NaOH and 0.1M CH3COOH yields a solution which is
(A) basic
(B) acidic
(C) neutral
(D) None

Answer

Answer: (a)

8. Equal volumes of 0.1M AgNO3 and 0.2M NaCl are mixed. The concentration of NO3– ions in the mixture will be
(A) 0.1M
(B) 0.05M
(C) 0.2M
(D) 0.15M

Answer

Answer: (b)

9. Which of the following should be done in order to prepare 0.4M NaCl starting with 100ml of 0.3M NaCl?
(A) add 5.85g of NaCl
(B) and 20ml water
(C) add 0.01 mol NaCl
(D) evaporate 10ml of water

Answer

Answer: (c)

10. The volume of 0.025M H3PO4 required to neutralise 25ml of 0.03M Ca(OH)2 is
(A) 20ml
(B) 25ml
(C) 40ml
(D) 50ml

Answer

Answer: (a)

300+ TOP MCQs on Alkene and Answers

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MCQs on Alkene :

1. Which of the following compounds react most readily with Br(g)?
(A) C2H2
(B) C3H6
(C) C2H4
(D) C4H10

Answer

Answer: (d)

2. When propene reacts with HBr in the presence of peroxide, it gives rise to
(A) allyl bromide
(B) isopropyl bromide
(C) n-propyl bromide
(D) 3-bromopropane

Answer

Answer: (d)

3. Find the alkene with maximum stability
(A) cis-2-Butene
(B) trans-2-Butene
(C) 1-Butene
(D) All have the same stability

Answer

Answer: (d)

4. Ethylene bromide on treatment with Zn gives
(A) Alkyne
(B) Alkene
(C) Alkane
(D) All of the above

Answer

Answer: (d)

5. Which of the following reactions is common in alkenes?
(A) Addition
(B) Elimination
(C) Substitution
(D) Superposition

Answer

Answer: (d)

6. Cis-trans isomerism in alkenes is due to
(A) chiral carbon
(B) free rotation about single bond
(C) free rotation about double bond
(D) restricted rotation about double bond

Answer

Answer: (d)

7. Baeyer’s reagent is used to detect
(A) glucose
(B) double bonds
(C) oxidation
(D) reduction

Answer

Answer: (d)

8. Which of the following will form 2 acetaldehyde molecules on ozonolysis?
(A) 1-pentene
(B) 2-pentene
(C) 1-butene
(D) 2-butene

Answer

Answer: (d)

9. Which of the following reagents will form 1-propanol from propene?
(A) B2H6, H2O2, OH–
(B) Aq. KOH
(C) H2O, H2SO4
(D) Hg(OAc)2, NaBH4/H2O

Answer

Answer: (d)

10. Geometrical isomerism is exhibited by
(A) 2-Butene
(B) 2-Butyne
(C) 2-Butenol
(D) Butanol

Answer

Answer: (d)

300+ TOP MCQs on Hydrogen 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 Hydrogen Multiple Choice Questions

MCQs on Hydrogen :

1. Electrolysis of brine produces
(A) chlorine gas
(B) hydrogen gas
(C) sodium hydroxide
(D) all the above

Answer

Answer: (d)

2. A reactant containing the element that is oxidised is called
(A) reducing agent
(B) oxidising agent
(C) hydrogen
(D) sublime

Answer

Answer: (a)

3. By losing one or two electrons the atoms of metal are
(A) oxidised
(B) reduced
(C) hydrogenated
(D) sublimated

Answer

Answer: (a)

4. Electrolytes conduct electricity in
(A) solid state
(B) liquid state
(C) gaseous state
(D) plasma state

Answer

Answer: (b)

5. Loss of hydrogen atoms by an element is called
(A) hydrogenation
(B) oxidation
(C) reduction
(D) sublimation

Answer

Answer: (b)

6. The electrolyte among the following is
(A) NaOH
(B) Urea
(C) glucose
(D) benzene

Answer

Answer: (a)

7. O-O-H bond angle in H2O2 is
(A) 97°
(B) 106°
(C) 120°
(D) 109°28′

Answer

Answer: (a)

8. Which of the following is very high for proton?
(A) radius
(B) ionization potential
(C) charge
(D) hydration energy

Answer

Answer: (d)

9. The list which contains only elements is
(A) air, water, oxygen
(B) hydrogen, oxygen, brass
(C) air, water, fire, earth
(D) calcium, sulphur, carbon

Answer

Answer: (d)

10. The smallest part of an element that cannot exist as a free state is
(A) ion
(B) charge
(C) atom
(D) molecule

Answer

Answer: (c)

300+ TOP MCQs on Oxidation Reduction 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 Oxidation Reduction Multiple Choice Questions

MCQs on Oxidation Reduction :

1. The total of the oxidation number in an element is
(A) charge
(B) volatility
(C) reduction
(D) oxidation

Answer

Answer: (a)

2. The reduction is a gain of
(A) electrons
(B) protons
(C) neutros
(D) oxygen

Answer

Answer: (a)

3. Which of the following is not a reducing agent?
(A) CO2
(B) SO2
(C) NO2
(D) ClO2

Answer

Answer: (a)

4. A number which is assigned to each atom or ion in a compound which explains its degree of oxidation is called
(A) oxidation state only
(B) oxidation number
(C) oxidation degree only
(D) oxidation state and number

Answer

Answer: (d)

5. The gain of oxygen is known as
(A) oxidation
(B) reduction
(C) halogenation
(D) chlorination

Answer

Answer: (a)

6. Which of the following undergoes a maximum change in its oxidation number, when a mixture of oxalic acid, potassium chlorate and sulphuric acid is heated?
(A) S
(B) Cl
(C) H
(D) C

Answer

Answer: (b)

7. The oxidation number for oxygen will always be
(A) 2
(B) -2
(C) 1
(D) -1

Answer

Answer: (b)

8. The reduction is the decrease in
(A) oxidation number
(B) charge
(C) solubility
(D) none of the above

Answer

Answer: (a)

9. The reaction in which oxidation and reduction takes place at the same time is called
(A) redox reaction
(B) oxidation reaction
(C) reduction reaction
(D) none of the above

Answer

Answer: (a)

10. Hydrogen (H2) is used for making
(A) margarine only
(B) ammonia only
(C) salts
(D) margarine and ammonia

Answer

Answer: (d)