Call Support +91-85588-96644
TCY online

Login

Sign Up

Please enter a Username or Email ID
Please enter a password
Keep me logged in
Please enter your name
Please enter your mobile number
You can't leave Captcha Code empty
By submitting this form, you agree to the Terms & Privacy Policy.
OR

Sign Up via Facebook

Sign Up via Google

Sign Up via Twitter

Download Software
Tests given

Download TCY App

OR
App Image

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.
Question should be at least 10 characters long.
+
Add Options | Community Guidelines
Cancel
Shreya Singhal
Shared from BITSAT Mock - 6 on Sep 20, 2020 12:11 AM

Directions: Match the following.

 
P - i, Q - ii, R - iii, S - iv
P - ii, Q - i, R - iv, S - iii
P - iii, Q - ii, R - iv, S - i
P - iii, Q - i, R - ii, S - iv
P - iv, Q - ii, R - iii, S - i
Please type your answer before submitting.

U better learn this and become sucessful, fo

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

Gaurav Singh
Shared from Paper-1 (2007) IIT-JEE on Sep 19, 2020 6:55 PM

Directions: The following question is based on the paragraph given below.


Chemical reactions involve interaction of atoms and molecules. A large number of atoms / molecules (approximately 6.023 ×1023) are present in a few grams of any chemical compound varying with their atomic /molecular masses. To handle such large numbers conveniently, the mole concept was introduced.
This concept has implications in diverse areas such as analytical chemistry, biochemistry electrochemistry and radiochemistry. The following example illustrates a typical case, involving chemical/electrochemical reaction, which requires a clear understanding of the mole concept. A 4.0 molar aqueous solution NaCl is prepared and 500 mL of this solution is electrolysed. This leads to the evolution of chlorine gas at one of the electrodes (atomic mass : Na = 23, Hg = 200;1 Faraday = 96500 coulombs).


The total number of moles of chlorine gas evolved is

 
0.5
1.0
2.0
3.0
Please type your answer before submitting.

Question is having wrong value of NaCl concentration. In question it is given [NaCl]=4.0M while in solution it is given, [NaCl]=0.4M

Chetan Vishnu
Shared from BITSAT Mock - 6 on Sep 16, 2020 8:00 PM

Which of the following compounds is named correctly?

 
Please type your answer before submitting.

IF FUNCTIONAL GRP IS IN RING ,IT WILL HAVE MORE PRIORITY SO KETONE WILL HAVE MORE PRIORITY THAN CARBOXYLIC ACID

Kishlay
Shared from BITSAT Mock - 6 on Sep 15, 2020 9:51 AM

On adding 0.1 M solution of [Ag+], [Ba2+] and [Ca2+] (each) in a Na2SO4 solution, compound that will be precipitated first is
[Ksp BaSO4 = 10-11, Ksp CaSO4 = 10-6 and Ksp Ag2SO4 = 10-5]

 
Ag2SO4
BaSO4
CaSO4
None of the above
Please type your answer before submitting.

You must specify how the answer must be given