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Chemistry Test 16
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Chemistry Test 16

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  • Question 1/30
    1 / -0

    Directions For Questions

    1,2 and 3

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    Consider the following : 1. Carbon dioxide 2. Oxides of Nitrogen 3. Oxides of Sulphur Which of the above is/are the emission/emissions from coal combustion at thermal power plants ?
    Solutions
    1,2 and 3
  • Question 2/30
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    Directions For Questions

    Both of them give colour with iodine

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    Which one of the following statements regarding starch and cellulose is NOT correct ?
    Solutions
    Both of them give colour with iodine
  • Question 3/30
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    Methane, ethane, propane and butane

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    Which one of the following is the correct sequence in increasing order of molecular weights of the hydrocarbons ?
    Solutions
    Methane, ethane, propane and butane
  • Question 4/30
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    Directions For Questions

    Aspartame is several times sweeter than table sugar,hence food items made with small quantities of aspartame yield fewer calories on oxidation

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    Aspartame is an artificial sweetener sold in the market. It consists of amino acids and provides calories like other amino acids. Yet it is used as a lowcalorie sweetening agent in food items. What is the basis of this use ?
    Solutions
    Aspartame is several times sweeter than table sugar,hence food items made with small quantities of aspartame yield fewer calories on oxidation
  • Question 5/30
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    Directions For Questions

    1 and 2 are correct

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    Consider the following statements about acetylene: 1. It is used in welding industry 2. It is a raw material for perparing plastics 3. It is easily obtained by mixing silicon carbide and water Of these statements :
    Solutions
    1 and 2 are correct
  • Question 6/30
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    Directions For Questions

    Aufbau principle

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    In an atom, the order of filling up of the orbitals is governed by
    Solutions
    Aufbau principle
  • Question 7/30
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    Directions For Questions

    A is false but R is true

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    Directions: The following items consist of two statements, one labelled as the 'Assertion (A)' and the other as 'Reason(R)'. You are to examine these two statements carefully and select the answer to these items using the codes given below : Assertion (A): The main constituent of the Liuefied Petroleum Gas is methane.Reason (R)    : Methane can be used directly for burning in homes and factories                       where it can be supplied through pipelines.
    Solutions
    A is false but R is true
  • Question 8/30
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    Directions For Questions

    Hydrolysis

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    An aqueous solution of copper sulphate is acidic in nature because the salt undergoes
    Solutions
    Hydrolysis
  • Question 9/30
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    Both A and R are true but R is NOT the correct explanation of A

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    Assertion (A):  Formic acid is a stronger acid than acetic acid.Reason (R): Formic acid is an organic acid.
    Solutions
    Both A and R are true but R is NOT the correct explanation of A
  • Question 10/30
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    Directions For Questions

    2 only

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    Consider the following statements with reference to the Periodic Table of chemical elements: 1. Lonisation potential gradually decreases along a period. 2. In a group of elements,electron affinity decreases as the atomic weight         increases. 3. In a given period, electronegativity decreases as  the atomic number           increases. Which of these statement(S) is/are correct ?
    Solutions
    2 only
  • Question 11/30
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    Directions For Questions

    only 1

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    With reference to ionic compounds, consider the following statements: 1. Ionic compounds are insoluble in alcohol. 2. Ionic compounds in the solid state are good conductors of electricity. Which of these statements is/are correct ?
    Solutions
    only 1
  • Question 12/30
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    Directions For Questions

    Both A and R are true and R is the correct explanation of A

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    Assertion (A): Phenyl is used as a household germicide.Reason (R):  Phenyl is a phenol derivative and phenol is an effective germicide.
    Solutions
    Both A and R are true and R is the correct explanation of A
  • Question 13/30
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    The presence of NaCl increases the rate of setting of Plaster of Paris

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    Which one of the following statements is NOT correct ?
    Solutions
    The presence of NaCl increases the rate of setting of Plaster of Paris
  • Question 14/30
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    A is true but R is false

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    Assertion (A): Sodium metal is stored under Kerosene.Reason (R): Metallic sodium melts when exposed to air.
    Solutions
    A is true but R is false
  • Question 15/30
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    Directions For Questions

    Orientation

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    Regarding the atom of a chemical element,the magnetic quantum number refers to
    Solutions
    Orientation
  • Question 16/30
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    Directions For Questions

    Both A and R are true and R is the correct explanation of A

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    Assertion (A):  To dilute sulphuric acid,acid is added to water and not water to acid.Reason (R): Specific heat of water is quite large.
    Solutions
    Both A and R are true and R is the correct explanation of A
  • Question 17/30
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    Directions For Questions

    Liquid Sodium is employed as a coolant in nuclear reactors

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    Which one of the following statements is correct ?
    Solutions
    Liquid Sodium is employed as a coolant in nuclear reactors
  • Question 18/30
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    Directions For Questions

    Both A and R are true and R is the correct explanation of A

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    Assertion (A): Large cold storage plants use ammonia as refrigerant while domestic refrigerators use chlorofluorocarbons.Reason (R): Ammonia can be liquified at ambient temperatures at low pressures.
    Solutions
    Both A and R are true and R is the correct explanation of A
  • Question 19/30
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    Directions For Questions

    only 1

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    Consider the following statements: The purpose of adding sodium sulphate and sodium silicate to the detergent in a washing powder is 1. To keep the washing powder dry. 2. To maintain the alkalinity of the powder. Which of these statements is/are correct ?
    Solutions
    only 1
  • Question 20/30
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    Directions For Questions

    Both A and R are true and R is the correct explanation of A

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    Assertion (A): A chemical reaction becomes faster at higher temperatures.Reason (R): At higher temperatures, molecular motion becomes more rapid.
    Solutions
    Both A and R are true and R is the correct explanation of A
  • Question 21/30
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    Directions For Questions

    1,2 and 3

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    Consider the following statements : 1. Baking soda is used in fire extinguishers. 2. Quicklime is used in the manufacture of glass. 3. Gypsum is used in the manufacture of Plaster of Paris. Which of the statements given above is/are correct ?
    Solutions
    1,2 and 3
  • Question 22/30
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    Directions For Questions

    A is false but R is true

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    Assertion (A): With the increase of temperature, the viscosity of glycerine increases.Reason (R): Rise temperature increases kinetic energy of molecules.
    Solutions
    A is false but R is true
  • Question 23/30
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    Directions For Questions

    A-(3),B-(4),C-(2),D-(1)

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    Match List-I (Fuel Gases)  with List-II (Major Constituents) and select the correct answer using the codes given below the lists: List-I               List-II A. CNG           1. Carbon monoxide, Hydrogen B. Coal gas      2. Butane, Propane C. LPG            3. Methane, Ethane D. Water gas    4. Hydrogen, Methane,Carbon monoxide
    Solutions
    A-(3),B-(4),C-(2),D-(1)
  • Question 24/30
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    Directions For Questions

    Both A and R are true and R is the correct explanation of A

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    Assertion (A):  Synthetic detergents can lather well in hard water.Reason (R):  Synthetic detergents form soluble calcium and magnesium salts with hard water.
    Solutions
    Both A and R are true and R is the correct explanation of A
  • Question 25/30
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    Directions For Questions

    18 parts gold and 6 parts other metals

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    Standard 18-carat gold sold in the market contains
    Solutions
    18 parts gold and 6 parts other metals
  • Question 26/30
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    Directions For Questions

    2 and 3

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    Consider the following statements 1. Anhydrous sodium carbonate is commonly known as baking soda. 2. Baking soda is used in fire extinguishers. 3. Bleaching powder is manufactured in Hasenclever plant. Which of the statements given above is/are correct ?
    Solutions
    2 and 3
  • Question 27/30
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    Directions For Questions

    Gold>Mercury > Steel

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    Which one of the following is the correct sequence of the given substances in the decreasing order of their densities ?
    Solutions
    Gold>Mercury > Steel
  • Question 28/30
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    Directions For Questions

    A is false but R is true

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    Assertion (A): In the periodic table of chemical elements, election affinity is always found to increase from top to bottom in a group.Reason (R): In a group, the atomic radii generally increase from top to bottom.
    Solutions
    A is false but R is true
  • Question 29/30
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    Directions For Questions

    1,2 and 4 only

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    Consider the following chemicals : 1. Benzene     2. Carbon tetrachloride   3. Sodium carbonate 4. Trichloroethylene Which of the above is/are used as dry cleaning chemicals?
    Solutions
    1,2 and 4 only
  • Question 30/30
    1 / -0

    Directions For Questions

    A is false but R is true

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    Assertion (A):  The main constituent of the Liquefied Petroleum Gas is methane. Reason (R): Methane can be used directly for burining in homes and factories where it can be supplied through pipelines.
    Solutions
    A is false but R is true
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