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Chemistry Test 15
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Chemistry Test 15
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  • Question 1/30
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    1 and 4

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    1. The voltage is usually 12 V. 2. Electrolyte used is hydrochloric acid. 3. Electrodes are lead and copper. 4. Capacity is expressed in ampere -hour. What of the above statements are correct ?
    Solutions
    1 and 4
  • Question 2/30
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    Hydrogen

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    Which one of the following has the highest fuel value ?
    Solutions
    Hydrogen
  • Question 3/30
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    Methane and air

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    Mixture of which one of the following pairs of gases is the cause of occurrence of most of the explosions in mines ?
    Solutions
    Methane and air
  • Question 4/30
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    Ethylene glycol

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    Which one of the following is used as an antifreeze for the automobile engines ?
    Solutions
    Ethylene glycol
  • Question 5/30
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    Barium is a good absorber of X-ray and this helps the stomach to appear clearly in contrast with the other regions in the picture

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    Barium in a suitable form is administered to patients before an X-ray examination of the stomach, because
    Solutions
    Barium is a good absorber of X-ray and this helps the stomach to appear clearly in contrast with the other regions in the picture
  • Question 6/30
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    Lithium and osmium

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    Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively ?
    Solutions
    Lithium and osmium
  • Question 7/30
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    A-(2),B-(4),C-(1),D-(3)

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    Match List-I with List-II and select the correct answer using the codes given below the lists: List-I                                        List-II A. Potassium bromide                 1. Fertiliser B. Potassium nitrate                   2. Photography C. Potassium sulphate                 3. Bakery D. Monopotassium tartarate          4. Gunpowder
    Solutions
    A-(2),B-(4),C-(1),D-(3)
  • Question 8/30
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    Nitroglycerine

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    Which one of the following is used as an explosive ?
    Solutions
    Nitroglycerine
  • Question 9/30
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    1 and 3 are correct

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    Consider the following statements: Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to 1. Act as a reducing agent. 2. Remove silica associated with the iron ore. 3. Function as fuel to supply heat. 4. Act as an oxidizing agent
    Solutions
    1 and 3 are correct
  • Question 10/30
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    Gamma rays

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    Cobalt -60 is commonly used in radiation therapy because it emits
    Solutions
    Gamma rays
  • Question 11/30
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    Potato contains water where as paper does not contain water.

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    If a potato is placed on a pure paper plate which is white and unprinted and put in a microwave oven,the potato heats up but the paper plate does not. This is because:
    Solutions
    Potato contains water where as paper does not contain water.
  • Question 12/30
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    1 and 2

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    Consider the following statements: Glass can be etched or scratched by 1. Diamond     2. Hydrofluoric acid      3. Aquaregia    4. Cone,sulphuric acid Which of these statements are correct ?
    Solutions
    1 and 2
  • Question 13/30
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    The formation of hypochlorous acid when chlorine is added to water.

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    Chlorination is a process used for water-purification. The disinfecting action of chlorine is mainly due to
    Solutions
    The formation of hypochlorous acid when chlorine is added to water.
  • Question 14/30
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    Zinc oxide

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    Aluminium surfaces are often 'anodized '. Thic means the deposition of a layer of
    Solutions
    Zinc oxide
  • Question 15/30
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    2 and 3

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    Hard water is not suitable for 1. Drinking     2. Washing clothes with soap    3. Use in bollers 4. Irrigating crops Which of these statements are correct ?
    Solutions
    2 and 3
  • Question 16/30
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    Malaria is caused by several species of Plasmodium.

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    Widespread resistance of malarial parasite to drugs like chloroquine has prompted attempts to develop a malarial vaccine to combat malaria. Why is it difficult to develop an effective malaria vaccine?
    Solutions
    Malaria is caused by several species of Plasmodium.
  • Question 17/30
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    Absorbs moisture

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    A small pouch containing silica gel is often found in bottles of medicine in tablet or powder form because silica gel
    Solutions
    Absorbs moisture
  • Question 18/30
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    Hawk

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    A pesticide which is a chlorinated hydrocarbon is sprayed on a food crop. The food chain is: Food crop-Rat -snake -Hawk. In this food chain, the highest concentration of the pesticide would accumulate in which one of the following?
    Solutions
    Hawk
  • Question 19/30
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    A-(2),B-(1),C-(4),D-(3)

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    Match List-I with List-II and select the correct answer using the codes given below the lists: List-I                       List-II A. German silver         1. Tin B. Solder                   2. Nickel C. Bleaching Powder     3. Sodium D. Hypo                     4. Chlorine
    Solutions
    A-(2),B-(1),C-(4),D-(3)
  • Question 20/30
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    1,2,3 and 4

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    India-based Neutrino Observatory is included by the Planning Commission as a mega science project under the 11th Five-year Plan. In this context,consider the following statements: 1. Neutrinos are chargeless elementary particles that travel close to the          speed of light. 2. Neutrinous are created in nuclear reactions of beta decay. 3. Neutrinous have a negligible, but non zero mass. 4. Trillions of Neutrinous pass through human body every second. Which of the statements given above are correct ?
    Solutions
    1,2,3 and 4
  • Question 21/30
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    Nichrome

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    Which one of the following materials very hard and very ductile ?
    Solutions
    Nichrome
  • Question 22/30
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    2 and 3 only

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    Consider the following : 1. Oxides of Hydrogen 2. Oxides of Nitrogen 3. Oxides of Sulphur Which of the above causes/cause acid rain ?
    Solutions
    2 and 3 only
  • Question 23/30
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    Both A and R are true but R is NOT the correct explanation of A

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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) : 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 24/30
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    Methane with air

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    Most of the explosions in mines occur due to the mixing of
    Solutions
    Methane with air
  • Question 25/30
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    They are adapted to grow in nitrogen deficient soils and thus depend on insects for sufficient nitrogenous nutrition.

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    Some species of plants are insectivorous. Why ?
    Solutions
    They are adapted to grow in nitrogen deficient soils and thus depend on insects for sufficient nitrogenous nutrition.
  • Question 26/30
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    Both A and R are true and R is the correct explanation of A

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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) : 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 27/30
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    Zirconium

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    Which one of the following is NOT radioactive ?
    Solutions
    Zirconium
  • Question 28/30
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    1 and 3 only

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    What is the difference between a CFL and  an LED lamp ? 1.  To produce light, a CFL uses mercury vapour and phosphor while an LED           lamp uses semiconductor material. 2. The average life span of a CFL is mach longer than that of an LED lamp. 3. A CFL is less energy -efficient as  compared to an LED lamp. Which of the statements given above is/are correct ?
    Solutions
    1 and 3 only
  • Question 29/30
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    A is true but R is false

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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) : Sodium metal is stored under Kerosene.Reason (R)     : Metallic sodium melts when exposed to air.
    Solutions
    A is true but R is false
  • Question 30/30
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    A-(2),B-(3),C-(1),D-(4)

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    Match List-I with List-II and select the correct answer using the codes given below the lists: List-I                            List-II (Characteristic )                (Particle ) A. Zero mass                 1. Positron B. Fractional charge         2. Neutrino C. Fractional spin             3. Quark D. Integral spin               4. Phonon
    Solutions
    A-(2),B-(3),C-(1),D-(4)
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