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Online Chemistry Quiz | Free Online Practice Test Questions and Answers

Online Chemistry Quiz

The Online Chemistry Quiz is a great help for those candidate who are preparing for any recruitment examination related to Chemistry. With the intention to help candidates in preparing for Chemistry test here we are providing Free Online Chemistry Practice Test. Students can check Latest Chemistry Questions and Answers from here.

With the help of these ChemistryTest Questions and Answers candidates can get to know that what kind of questions they have to face at the time of examination.After solving the Chemistry Quiz candidates can also estimate about their preparation for examination.

Here in this page we have listed some of the top most asked questions and answers during Chemistry Exam. You must check the Online Chemistry Quiz structured in the below section of this page which is created by team www.recruitmentinboxx.com

Online Chemistry Quiz

Question1: The nucleus of an atom consists of

  1. electrons and neutrons
  2. electrons and protons
  3. protons and neutrons
  4. All of the above

Answer: Option 3

Question2: The number of moles of solute present in 1 kg of a solvent is called its

  1. molality
  2. molarity
  3. normality
  4. formality

Answer: Option 1

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Question3: The most electronegative element among the following is

  1. sodium
  2. bromine
  3. fluorine
  4. oxygen

Answer: Option 3

Question4: The metal used to recover copper from a solution of copper sulphate is

  1. Na
  2. Ag
  3. Hg
  4. Fe

Answer: Option 4

Question5: The number of d-electrons in Fe2+ (Z = 26) is not equal to that of

  1. p-electrons in Ne(Z = 10)
  2. s-electrons in Mg(Z = 12)
  3. d-electrons in Fe(Z = 26)
  4. p-electrons in CI(Z = 17)

Answer: Option 4

Question6: The metallurgical process in which a metal is obtained in a fused state is called

  1. smelting
  2. roasting
  3. calcinations
  4. froth floatation

Answer: Option 1

Question7: The molecules of which gas have highest speed?

  1. H2 at -73oC
  2. CH4 at 300 K
  3. N2 at 1,027oC
  4. O2 at 0oC

Answer: Option 1

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Question8: The oldest rocks in the earth’s crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock’s called

  1. granite
  2. basalt
  3. igneous rocks
  4. sedimentary rocks

Answer: Option 3

Question9: The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is

  1. Dalton’s law
  2. Gay Lussac’s law
  3. Henry’s law
  4. Raoult’s law

Answer: Option 3

Question 10: The main buffer system of the human blood is

  1. H2CO3 – HCO3
  2. H2CO3 – CO32-
  4. NH2CONH2 – NH2CONH+

Answer: Option 1

Question 11: The gas present in the stratosphere which filters out some of the sun’s ultraviolet light and provides an effective shield against radiation damage to living things is

  1. helium
  2. ozone
  3. oxygen
  4. methane

Answer: Option 2

Question 12: The most commonly used bleaching agent is

  1. alcohol
  2. carbon dioxide
  3. chlorine
  4. sodium chlorine

Answer: Option 3

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Question 13: The nucleus of a hydrogen atom consists of

  1. 1 proton only
  2. 1 proton + 2 neutron
  3. 1 neutron only
  4. 1 electron only

Answer: Option 1

Question 14: The heat required to raise the temperature of body by 1 K is called

  1. specific heat
  2. thermal capacity
  3. water equivalent
  4. None of the above

Answer: Option 2

Question 15: The nuclear particles which are assumed to hold the nucleons together are

  1. electrons
  2. positrons
  3. neutrons
  4. mesons

Answer: Option 4

Question 16: The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is

  1. 2.05 gram
  2. 3.05 gram
  3. 4.05 gram
  4. 5.05 gram

Answer: Option 2

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Question 17: The octane number of zero is assigned to

  1. 2-methyl octane
  2. n-heptane
  3. iso-octane
  4. 3-methyl octane

Answer: Option 2

Question 18: The metal that is used as a catalyst in the hydrogenation of oils is

  1. Ni
  2. Pb
  3. Cu
  4. Pt

Answer: Option 1

Question 19: The most abundant rare gas in the atmosphere is

  1. He
  2. Ne
  3. Ar
  4. Xe

Answer: Option 3

Question 20: The Latin word formica means ant. The name formic acid is derived from this Latin word because

  1. this acid, in ancient times, was used to eliminate ant-hills
  2. this corrosive acid is secreted by ants to drive away their enemies
  3. this acid was first obtained by the distillation of ants
  4. ants are attracted by the odour of this acid

Answer: Option 3

Question 21: The ore which is found in abundance in India is

  1. monazite
  2. fluorspar
  3. bauxite
  4. magnetite

Answer: Option 1

Question 22: The inherited traits of an organism are controlled by

  1. RNA molecules
  2. nucleotides
  3. DNA molecules
  4. enzymes

Answer: Option 3

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Question 23: The heat energy produced when the human body metabolises 1 gram of fat is

  1. 30 KJ
  2. 1 KJ
  3. 39 KJ
  4. 29 KJ

Answer: Option 3

Question 24: What are the number of moles of CO2 which contains 16 g of oxygen?

  1. 0.5 mole
  2. 0.2 mole
  3. 0.4 mole
  4. 0.25 mole

Answer: Option 1

Question 25: The main use of salt in the diet is to

  1. make the taste of food better
  2. produce in small amounts the hydrochloric acid required for the digestion of food
  3. ease the process of cooking
  4. increase the solubility of food particles in water

Answer: Option 2

Question 26: The monomer of polythene is

  1. vinyl chloride
  2. ethylene
  3. ethyl alcohol
  4. None of the above

Answer: Option 2

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Question 27: The luster of a metal is due to

  1. its high density
  2. its high polishing
  3. its chemical inertness
  4. presence of free electrons

Answer: Option 4

Question 28: The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is

  1. 1.568 x 103
  2. 6.023 x 1019
  3. 4.84 x 1017
  4. 6.023 x 1023

Answer: Option 2

Question 29: The most malleable metal is

  1. platinum
  2. silver
  3. iron
  4. gold

Answer: Option 4

Question 30: The oil used in the froth floatation process is

  1. coconut oil
  2. olive oil
  3. kerosene oil
  4. pine oil

Answer: Option 4

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Question 31: The number of waves in n x 10th Bohr’s orbit are

  1. n2
  2. n
  3. n-2
  4. n3

Answer: Option 2

Question 32: The mass of one Avogadro number of helium atom is

  1. 1.00 gram
  2. 4.00 gram
  3. 8.00 gram
  4. 4 x 6.02 x 1023 gram

Answer: Option 2

Question 33: The items amenable to detection by soft x-rays are

  1. contrabands
  2. lead in bullets
  3. narcotics
  4. genuine coins from counterfeit coins

Answer: Option 4

Question 34: The material which can be deformed permanently by heat and pressure is called a

  1. thermoplastic
  2. thermoset
  3. chemical compound
  4. polymer

Answer: Option 2

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Question 35: The mass number of a nucleus is

  1. always less than its atomic number
  2. the sum of the number of protons and neutrons present in the nucleus
  3. always more than the atomic weight
  4. a fraction

Answer: Option 2

Question 36: The inexpensive and commonly used variety of glass is called soda glass. It is called so because

  1. was used initially for making bottles of soda(carbonated drink)
  2. is made using soda(sodium carbonate)
  3. was initially used for storing sodium carbonate
  4. is made using soda lime

Answer: Option 2

Question 37: The gas used in the manufacture of vanaspati from vegetable oil is

  1. hydrogen
  2. oxygen
  3. nitrogen
  4. carbon dioxide

Answer: Option 1

Question 38: The ionic radii of N3-, O2-, F- and Na+ follows the order

  1. N3-> O2- > F> Na+
  2. N3- > Na+> O2> F
  3. Na+ > O2- > N3-> F
  4. O2- > F> Na+ > N3

Answer: Option 1

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Question 39: The graphite rods in the nuclear reactor

  1. react with U to release energy
  2. produce neutrons
  3. undergo combustion which triggers the nuclear fission
  4. convert fast moving neutrons into thermal neutrons

Answer: Option 4

Question 40: The first metal used by man was

  1. iron
  2. copper
  3. gold
  4. bronze

Answer: Option 2

Question 41: The hydronium ion is

  1. H+
  2. HO
  3. H2+
  4. H3O+

Answer: Option 4

Question 42: The most electropositive elements among the following is

  1. Na
  2. Ca
  3. K
  4. Cs

Answer: Option 4

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Question 43: The method that cannot be used for removing permanent hardness of water is

  1. adding sodium carbonate
  2. distillation
  3. adding caustic soda
  4. boiling

Answer: Option 4

Question 44: The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?

  1. 3 billion years
  2. 100 years
  3. 0.01 minute
  4. 13 days

Answer: Option 3

Question 45: The gas used for artificial ripening of green fruit is

  1. ethylene
  2. ethane
  3. carbon dioxide
  4. acetylene

Answer: Option 1

Question 46: Zone refining is used for the purification of

  1. Au
  2. Ge
  3. Ag
  4. Cu

Answer: Option 2

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Question 47: The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is

  1. cineole
  2. engenol
  3. geraniol
  4. limonene

Answer: Option 1

Question 48: The molecule which has the highest percentage of ionic character among the following is

  1. HI
  2. HF
  3. HCI
  4. HBr

Answer: Option 2

Question 49: The high reactivity of fluorine is due to

  1. its high electro negativity
  2. small size of fluorine atom
  3. availability of d-orbitals
  4. strong F – F bond

Answer: Option 1

Question 50: The iron ore magnetite consists of

  1. Fe2O3
  2. Fe3OH4
  3. FeCO3
  4. 3Fe2O3 .. 3H2O

Answer: Option 1

Tips To Crack Chemistry Exam

  • It is very important to understand each and every topic and their basic concepts; hence you must go through the NCERT book.
  • First start with Physical Chemistry, solve examples, mug up all formulas. Once concepts are clear, try to implement concepts and procedures by solving max.
  • Chemistry as a subject is not too difficult, but actually scoring. Referring to model question papers will give you an insight in identifying the important and frequently asked questions.
  • When solving the Online Chemistry Test, try to complete it in a stipulated time.
  • You can prepare a formula chart of these topics and keep for revising them as they are quite helpful in objective exams.
  • The regular practice, positive attitude, hard work, coming up with solutions to problems and strengthening your weak areas will help you achieve your target.

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The Online Chemistry Quiz for Class 9/10/12/8/7 can also be solved online by visiting many online preparation and guidance sites. Here on this page we have stated some of the important questions of Online Chemistry Quiz Free. Online Chemistry Quiz is just like a Game, you can easily play it by giving answers and afterwards can check your performance. If you are thinking about buying Chemistry Books then you must consider Mcgraw Hill Books as these are one of best books.

We hope that this page will guide you with an idea about set of question that will be asked in coming exam. And thus you will be able to clear examination with good preparation. We wish you Good Luck!!!!

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