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Science Preparation for Engineering Entrance

(2706 Posts)

This thread is dedicated to preparation for Science section of Engineering Entrance exams like IITJEE, RPET, BITSAT, GCET, EAMCET, ISAT, KEAM, WBJEE etc. You may share questions related to all topics from Physics and Chemistry.

Question should not exceed 100 characters.Use add options for multiple choice questions and "Uploadimage/Add related data" for passage text papers.
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Niharika Patnaikuni
Shared from Hydrocarbons - 2 (CBSE) on Jan 18, 2023 8:42 AM



The final product in the above reaction is

 
2-cyclohexylethanol
cyclohexylethanal
5-oxohexanal
cyclohexanecarbaldehyde
cyclohexylethanoic acid
Please type your answer before submitting.

Is (Ch3)2S

Kausalya
Shared from IUPAC Nomenclature on Jul 19, 2021 5:42 PM

IUPAC name of the organic compound that is written by the following structure is_____.

 
Hexane-1,3,5-trinitrile
Heptane-1,3,5-trinitrile
3-cyanohexane-1,6-dinitrile
Butane-1,3,4-trinitrile
Butane-1,2,4-trinitrile
Please type your answer before submitting.

Since the longest chain has 4 carbon atoms its butane and 3 cyanide groups its tri nitrile 123 becoz its the lowest locant possible
rn

Raghavendra Joshi
Shared from BITSAT Mock - 9 on Jul 04, 2021 8:29 PM

Which of the following statements account(s) for the acidic nature of acetylene?

 
Acetylene contains more number of hydrogen atoms than carbon atoms.
Acetylene has a greater percentage of carbon content.
Sigma electron density of C-H bond of acetylene is closer to carbon, which has 50% of s-character.
All of these
Please type your answer before submitting.

A and C both are correct, right?

Raghavendra Joshi
Shared from BITSAT Mock - 7 on Jun 29, 2021 11:10 AM

Consider the following reaction.



'A' and 'B' are

 
Please type your answer before submitting.

How can double bond be more stable than ring? mustn't option b be correct?

Shreya Singhal
Shared from BITSAT Mock - 6 on Sep 20, 2020 12:03 AM

In the conversion of limestone to lime,

CaCO3 (s) CaO (s) + CO2 (g),

the values of H0 and S0 are +179.1kJ mol-1 and 160.2 J/K, respectively, at 298 K and 1 bar. Assuming that H0 and S0 do not change with temperature, the temperature above which conversion of limestone to lime will be spontaneous is

 
1008 K
1200 K
845 K
1118 K
Please type your answer before submitting.

Stupid answers