NEET Exam  >  NEET Tests  >  Chemistry Practice Tests: CUET Preparation  >  Chemistry: CUET Mock Test - 8 - NEET MCQ

Chemistry: CUET Mock Test - 8 - NEET MCQ


Test Description

40 Questions MCQ Test Chemistry Practice Tests: CUET Preparation - Chemistry: CUET Mock Test - 8

Chemistry: CUET Mock Test - 8 for NEET 2024 is part of Chemistry Practice Tests: CUET Preparation preparation. The Chemistry: CUET Mock Test - 8 questions and answers have been prepared according to the NEET exam syllabus.The Chemistry: CUET Mock Test - 8 MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Chemistry: CUET Mock Test - 8 below.
Solutions of Chemistry: CUET Mock Test - 8 questions in English are available as part of our Chemistry Practice Tests: CUET Preparation for NEET & Chemistry: CUET Mock Test - 8 solutions in Hindi for Chemistry Practice Tests: CUET Preparation course. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free. Attempt Chemistry: CUET Mock Test - 8 | 40 questions in 45 minutes | Mock test for NEET preparation | Free important questions MCQ to study Chemistry Practice Tests: CUET Preparation for NEET Exam | Download free PDF with solutions
1 Crore+ students have signed up on EduRev. Have you? Download the App
Chemistry: CUET Mock Test - 8 - Question 1

Which of the following is not an oxo-acid of nitrogen?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 1

Hyponitric acid does not exist. The rest three mentioned are commonly occurring oxoacids of nitrogen. Hyponitrous acid, H2N2O2 is an isomer tautomer of nitramide, with the structure of the former being HON = NOH. Nitrous acid, HNO2 is usually formed in the atmosphere prior conversion to nitric acid. It is highly unstable.

Chemistry: CUET Mock Test - 8 - Question 2

Which of the following reactions best represents lab scale preparation of nitric acid?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 2

The most appropriate lab scale preparation method of nitric acid, HNO3 is using an alkali nitrate salt and react it with concentration nitric acid in a glass retort. Nitrous acid being highly unstable decomposes into nitric acid. The other two sets of reaction represent the industrial process of manufacturing nitric acid i.e. Ostwald’s process.

Chemistry: CUET Mock Test - 8 - Question 3

What is the catalyst used in the industrial manufacture of nitric acid?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 3

Pt-Rh gauze sheet is widely used as the catalyst in ammonic oxidation, the first step of Ostwald’s process. Fe2O3 is used in Haber’s process; V2O5 in contact process and Zn (Hg) is used in Clemmensen reduction of aldehydes.
 

Chemistry: CUET Mock Test - 8 - Question 4

Which of these gases is released upon treating zinc with diluted and then concentrated nitric acid?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 4

The products released depend on the concentration of nitric acid. In case of zinc metal, diluted nitric acid treatment release nitrous oxide and concentrated nitric acid causes the release of nitrogen dioxide.

Chemistry: CUET Mock Test - 8 - Question 5

Which reagent is predominantly used in pickling of stainless steel?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 5

Pickling of stainless steel is the process of removal of a thin layer of the alloyed metal from the surface. The common reagent used is nitric acid along with calculated amounts of hydrofluoric acid.

Chemistry: CUET Mock Test - 8 - Question 6

How many moles of nitric acid is required to convert 1 mole of sulfur to sulfuric acid?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 6

1 mole of sulfur, S8 requires 48 moles of concentrated nitric acid. The reaction is given by S8 + 48HNO3 → 8H2SO4 + 48NO2 + 16H2O. 10, 4 and 20 moles of concentrated nitric acid is required to produce iodic acid, carbon dioxide and phosphoric acid from 1 mole of iodine, carbon and phosphorus, respectively.
 

Chemistry: CUET Mock Test - 8 - Question 7

What product(s) is/are formed when aluminum metal is treated with concentrated nitric acid?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 7

Aluminum does not dissolve in nitric acid. This is because treatment with nitric acid results in the formation of a tough oxide layer. This oxide layer prevents it from further reacting with the oxide. Hence, the compound formed is Al2O3 i.e. aluminum (III) oxide.

Chemistry: CUET Mock Test - 8 - Question 8

What is the nitric acid – water composition by mass, respectively, for the components to form an azeotrope?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 8

Experimentally, it is determined that nitric acid and water form a constant boiling azeotrope at 68% – 32% by mass composition, respectively. Here, it becomes impossible to separate water and nitric acid by distillation methods. Thus, concentrated sulfuric acid is used for dehydration and removal of water.

Chemistry: CUET Mock Test - 8 - Question 9

What is the name of the industrial process to manufacture nitric acid?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 9

Ostwald’s process is the name of the industrial process to manufacture nitric acid in bulk. It involves the oxidation of ammonia which forms nitric oxide. This is then reacted with more oxygen to produce nitrogen dioxide. Subsequently, nitrogen dioxide is dissolved in water to produce adequate concentrations of nitric acid. Contact process is used to produce sulfuric acid. Solvay is used to obtain sodium carbonate and Haber-Bosch to obtain ammonia.

Chemistry: CUET Mock Test - 8 - Question 10

Which of the following is true regarding nitric acid?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 10

Nitric acid is a very weak reducing agent since it has a polar O – H bond. This breaks to donate the H+ ion which is why it is a strong oxidizing agent and a strong acid. Since there is only one cleavable O – H bond, the basicity of nitric acid is unity (one HNO3 molecule can donate only 1 H+ ion). It exists as a planar molecule in vapor phase.

Chemistry: CUET Mock Test - 8 - Question 11

What happens to the size of atoms of elements of p-block as we move from left to right in the same period?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 11

The size of the atoms of the elements decrease from left to right in the same period. Considering the row to be the same, the electrons are added to the same shell. However, the increase in atomic number reflects the increase in number of protons i.e. the positive charge. Hence, the overall effective nuclear charge increases. Consequently, the electron cloud is pulled even more closer to the nucleus of the atom. Therefore, the size decreases.

Chemistry: CUET Mock Test - 8 - Question 12

Why does nitrogen show poor tendency towards catenation?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 12

The N – N single bond is highly weak and unstable due to high magnitude of inter-electronic repulsions of non-bonding electrons which in turn is caused by the single bond’s small bond length. As a result the catenation tendency becomes weaker due to the mentioned factors leading to instability.

Chemistry: CUET Mock Test - 8 - Question 13

Which gas is released when copper chips are subjected to concentrated nitric acid?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 13

Treating copper chips with concentrated nitric acid releases toxic brown gas, NO2, nitrogen (IV) oxide. It is a reddish-brown gas with pungent odor.

Chemistry: CUET Mock Test - 8 - Question 14

Which of the following ions is the brown ring test useful for determining?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 14

The brown ring test is used to determine the presence of nitrate ions, NO3-. Dilute ferrous sulfate solution is added to solution containing nitrate ion. Following this, concentrated sulfuric acid is added along the sides of the test tube. A brown ring is formed at the junction concentrated sulfuric acid and solutions.

Chemistry: CUET Mock Test - 8 - Question 15

What is the oxidation state of nitrogen in di-nitrogen trioxide?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 15

Di-nitrogen trioxide is formulated as N2O3
The oxidation state of oxygen atom is fixed at -2 since it is the more electronegative atom in this case.
If oxidation state of nitrogen is assumed to be ‘x’, then:
2x + (3x -2) = 0
2x – 6 = 0
x = +3
The oxidation state of nitrogen is +3.

Chemistry: CUET Mock Test - 8 - Question 16

What catalyst is used for oxidation of ammonia to produce nitric acid?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 16

Ammonia is oxidized to nitrogen (II) oxide in the presence of Pt/Rh gauze catalyst at a temperature of 500 K and a pressure of 9 bars. The nitrous oxide is then converted to nitrogen dioxide which is further reacted with water to produce nitric acid. The NO formed is recycled.

Chemistry: CUET Mock Test - 8 - Question 17

What shape is the HNO3 molecule in its gaseous state?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 17

In the gas state, the nitric acid molecule has a triangular planar shape with a steric number of 3 no lone pairs of electron. There are two major resonance forms of nitric acid.

Chemistry: CUET Mock Test - 8 - Question 18

What is the primary product of Haber-Bosch process?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 18

The primary product of Haber-Bosch process is ammonia, NH3. In this process, N2(g) and H2(g) are reacted at a high temperature of 700 K and 200 atm pressure in presence of iron-bed catalysts. It is an exothermic process which takes place in accordance with Le Chatelier’s principle. Nitric acid is produced by Ostwald’s process. Nitrous acid is produced by reacting sodium nitrite with a mineral and pyridine by Chichibabin process.

Chemistry: CUET Mock Test - 8 - Question 19

What is the maximum covalency of the nitrogen atom?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 19

Covalency of an atom refers to the number of electrons that atom can share to form chemical bonds. Usually it is the number of bonds formed by the atom. In case of nitrogen, its atom can share up to four electrons, one in the s-subshell and the other three in the p-subshell. In addition to this, absence of d-orbitals restricts its covalency to four only.

Chemistry: CUET Mock Test - 8 - Question 20

What is the type of metallurgy in which the ore is leached and the metal is collected by using electrolysis?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 20

Hydrometallurgy is a technique within the field of extractive metallurgy, the obtaining of metals from their ores. Hydrometallurgy involves the use of aqueous solutions for the recovery of metals from ores, concentrates, and recycled or residual materials.

Chemistry: CUET Mock Test - 8 - Question 21

When is the ore subjected to leach?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 21

The ore is subjected to leaching when both the ore and impurity are insoluble in water. Leaching process is commonly referred to as extraction. This is a process in which water soluble substances are washed out from soil or wastes.

Chemistry: CUET Mock Test - 8 - Question 22

Roasting results in the formation of oxides. But why are oxide ores are subjected to roasting?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 22

Oxide ores are subjected to roasting to remove the volatile impurities in the form of their oxides. It is easier to obtain metals from their oxides (by reduction) than from carbonates or sulphides. So before reduction can be done, the ore is converted into metal oxide.

Chemistry: CUET Mock Test - 8 - Question 23

How is ore-dressing of iron done?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 23

 In magnetic separators, the effect of magnetism is used to separate ferromagnetic materials from non-magnetic materials. In principle, this process is also suitable for the iron ores siderite and hematite, which become weakly magnetic when heated.

Chemistry: CUET Mock Test - 8 - Question 24

Which of the following metals is not extracted by electrolysis?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 24

Actually the extraction of a metal from its ore depends upon the selection of a proper reducing agent. Iron is a moderately active metal and its oxides can be reduced using carbon and not by using electrolysis. Reactive metals, such as aluminium, are extracted by electrolysis, while a less reactive metal, such as iron, may be extracted by reduction with carbon.

Chemistry: CUET Mock Test - 8 - Question 25

What is the main reaction occurring in the blast furnace during extraction of iron from haematite?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 25

The main reaction occurring in the blast furnace during extraction of iron from haematite is:
Fe2O3 + 3CO → 2Fe + 3CO2
This reaction involves the reduction of iron (III) oxide to iron and oxidation of carbon monoxide to carbon dioxide.

Chemistry: CUET Mock Test - 8 - Question 26

Which of the following ores are concentrated by froth flotation?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 26

The froth flotation method is widely used for the concentration of sulphide ores such as zinc blende (ZnS), copper pyrites (CuFeS2), galena (PbS), etc. This method is based upon the fact that the surface of the sulphide ores is preferentially wetted by oils while that of gangue is preferentially wetted by water.

Chemistry: CUET Mock Test - 8 - Question 27

Which of the following statements is wrong?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 27

Smelting is the process of extraction of a metal from its oxide by reduction with carbon (coke). Alkali metals, alkaline earth metals, etc. cannot be prepared by reduction of their respective oxides with carbon. The slag formed during smelting has high melting point and is lighter than the metal.

Chemistry: CUET Mock Test - 8 - Question 28

Which of the following is the chief ore of aluminium?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 28

Bauxite is the chief ore of aluminium. The composition of bauxite is Al2O3.2H2O, it’s a mixture of hydrated iron oxide and hydrated aluminium oxide. Kaolinite is another ore of aluminium but its less availability is less compare to bauxite and the extraction of aluminium from kaolinite is a hard process and costs more.

Chemistry: CUET Mock Test - 8 - Question 29

What is the composition of Kaolinite?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 29

Kaolinite is a soft clay type material with the chemical composition [Al2(OH)4Si2O4]. It’s basically made up of hydrous aluminium silicates, they comprise the principle ingredients of kaolin (china clay). It is usually white in appearance and sometimes red due to iron oxide.

Chemistry: CUET Mock Test - 8 - Question 30

Which of the following is not a suitable ore for extracting iron?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 30

The composition of iron pyrite is FeS2. Iron pyrite is exothermic and can cause hazard in mines, it is more economical to extract iron from other ores such as magnetite and hematite. Pyrites are generally unstable and might turn into sulfurous minerals.

Chemistry: CUET Mock Test - 8 - Question 31

What is the concentration of zinc in calamine?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 31

The chemical composition of calamine is ZnCO3 with 98 percent concentration of zinc. It is available in abundance and can be artificially prepared in laboratories. It is used in medication to relieve pain and itching.

Chemistry: CUET Mock Test - 8 - Question 32

Silver is extracted from which of the following ore?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 32

rgentite also knows as silver glance is the only given silver ore in the above options with chemical composition Ag2S. Silver is extracted from silver glance by a simple process known as smelting or chemical leaching.

Chemistry: CUET Mock Test - 8 - Question 33

What is the composition of brass?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 33

Brass is an alloy of copper and zinc, typically 63 percent copper and 37 percent zinc. Sometimes poor quality brass may contain a little lead. Brass is naturally corrosion resistant and has very low friction. It is used for construction of water pipes and fittings.

Chemistry: CUET Mock Test - 8 - Question 34

Which of the following is the finest iron ore?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 34

Magnetite is the finest iron ore with a very high content of iron up to 72 percent. It has a very good magnetic property and is valuable in electrical industry. Hematite is another very important iron ore but the iron content of hematite is slightly lower than magnetite.

Chemistry: CUET Mock Test - 8 - Question 35

Which of the following is not an example of a water-in-oil emulsion?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 35

In an emulsion of water-in-oil (w/o), water is the dispersed phase and oil is the dispersion medium. Cod liver oil, butter and cold cream are all examples of the water-in-oil type of emulsions.

Chemistry: CUET Mock Test - 8 - Question 36

What is the difference between vanishing cream and cold cream?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 36

Vanishing cream is an oil-in-water emulsion, that is, oil is the dispersed phase and water is the dispersion medium. Cold cream is a water-in-oil emulsion, that is, water is the dispersed phase and oil is the dispersion medium.

Chemistry: CUET Mock Test - 8 - Question 37

Which of the following statements regarding emulsions is false?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 37

Emulsions can be separated into their constituent liquids by boiling, freezing, centrifuging, electrostatic precipitation by adding large amounts of the electrolyte to precipitate out the dispersed phase or by chemical destruction of the emulsifying agent.

Chemistry: CUET Mock Test - 8 - Question 38

What is the emulsifier present in milk that makes it stable?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 38

The emulsifier or emulsifying agent present in dairy emulsions is Casein. Casein is a slow-digesting dairy protein that people often take as a supplement.The most common form of casein is sodium caseinate.

Chemistry: CUET Mock Test - 8 - Question 39

What is the dispersion of a liquid in another liquid called?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 39

The dispersion of a liquid in a solid is called gel. The dispersion of a gas in a liquid medium is called foam. The dispersion of a liquid in another liquid is called emulsion. The dispersion of a solid or liquid in a gaseous medium is called aerosol.

Chemistry: CUET Mock Test - 8 - Question 40

Which of the following statement about emulsions is true?

Detailed Solution for Chemistry: CUET Mock Test - 8 - Question 40

The digestion of fats in the intestines takes place by the process of emulsification. A small amount of the fat reacts with the alkaline solution present in the intestines to form a sodium soap.

260 tests
Information about Chemistry: CUET Mock Test - 8 Page
In this test you can find the Exam questions for Chemistry: CUET Mock Test - 8 solved & explained in the simplest way possible. Besides giving Questions and answers for Chemistry: CUET Mock Test - 8, EduRev gives you an ample number of Online tests for practice

Up next

Download as PDF

Up next

How to Prepare for NEET

Read our guide to prepare for NEET which is created by Toppers & the best Teachers
Download the FREE EduRev App
Track your progress, build streaks, highlight & save important lessons and more!