Jeevith Publications 2nd PUC Chemistry. We covered all the Jeevith Publications 2nd PUC Chemistry in this post for free so that you can practice well for the exam.
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Jeevith Publications 2nd PUC Chemistry Objective for Students
LPG is a mixture of
(a) methane and butane
(b) butane and propane
(c) methane and propane
(d) ethane and propane
Option b – butane and propane
Which one among the following agents is added to domestic LPG cylinders to help in the detection of gas leakage?
(a) Methanol
(b) Ethanol
(c) Thioethanol
(d) Chloroform
Option c – Thioethanol
CNG is
(a) Compressed Natural Gas
(b) Cyanogen Natural Gas
(c) Condensed Nitrogen Gas
(d) Controlled Natural Gas
Option a – Compressed Natural Gas
Quality diesel is measured in terms of its
(a) cetane number
(b) octane number
(c) gold number
(d) Avogadro’s number
Option a – cetane number
The stench due to leakage from the LPG cylinder is because of
(a) Methane
(b) Propane
(c) Butane
(d) Ethyl mercaptan
Option d – Ethyl mercaptan
In the context of alternative sources of energy, ethanol as a viable bio-fuel can be obtained from
(a) sugarcane
(b) potato
(c) rice
(d) wheat
Option a – sugarcane
Biogas is formed through
(a) fermentation
(b) oxidation
(c) aerobic respiration
(d) reduction
Option a – fermentation
Which of the following fuels has a calorific value equal to petrol?
(a) Methane
(b) Kerosene
(c) CNG
(d) LPG
Option b – Kerosene
Gasohol is a mixture of
(a) gasoline and methanol.
(b) gasoline and ethanol.
(c) gasoline and propanol.
(d) methanol and ethanol.
Option b – gasoline and ethanol
Glycol is added to aviation gasoline because it
(a) reduces the evaporation of petrol.
(b) increase the efficiency of petrol.
(c) prevents freezing of petrol.
(d) reduce consumption of petrol.
Option c – prevents freezing of petrol
Hydrogen gas can be conveniently used as fuel for running vehicles if it is absorbed at a very low temperature by a substance only to be released at the temperature generated by the exhaust. What is that substance found in India?
(a) Hydride
(b) Coals
(c) Soapstone
(d) Resins
Option a – Hydride
Consider the following statements. I. Fuels with low octane numbers are ideal for diesel engines. II. The use of gasoline with low octane numbers may lead to the problem of engine knocking. Which of the statement(s) given above is/are correct?
(a) Only I
(b) Only II
(c) Both I and II
(d) Neither I nor II
Option c – Both I and II
Consider the following features of newer models of motor cars. I. Radial tyres II. Streamlined body III. Multipoint fuel injection IV. Catalytic converter with exhaust Which of these features make the new models of motor cars more fuel efficient?
(a) I and II
(b) II and III
(c) II, III and IV
(d) I, III and IV
Option d – I, III and IV
Consider the following statements I. Liquefied Natural Gas (LNG) is liquefied under extremely cold temperatures and high pressure to facilitate storage or transportation in specially designed vessels. II. The First LNG terminal in India was built in Hassan. III. Natural Gas Matters (NGM) are separated from LPG and these include ethane, propane, butane, and natural gasoline. Which of the statements given above is/are correct?
(a) Only I
(b) I and III
(c) II and II
(d) I, II, and III
Option a – Only I
How CNG is a cleaner fuel? I. It produces oxides of Sulphur and Nitrogen in very small amounts. II. It makes the environment less polluted. III. It emits less greenhouse gases.
(a) Only I and II
(b) Only II and III
(c) Only I and III
(d) All I, II, and III
Option c – Only I and III
The substances which vaporize during burning give
(a) Brent crude
(b) flame
(c) diesel
(d) petroleum
Option b – flame
The innermost region of flame has the temperature
(a) highest
(b) lowest
(c) medium
(d) high to low
Option b – lowest
The middle region of the flame has color.
(a) Yellow
(b) Black
(c) Red
(d) White
Option a – Yellow
Which one of the flames is used by the Goldsmith to heat the gold?
(a) Innermost region
(b) Middle region
(c) Outermost region
(d) None of these
Option c – Outermost region
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