Banner 0
Banner 1
Banner 2
Banner 3
Banner 4
Banner 5
Banner 6
Banner 7
Banner 8
Banner 9
AI Mentor
Check Your IQ
Free Expert Demo
Try Test

Courses

Dropper NEET CourseDropper JEE CourseClass - 12 NEET CourseClass - 12 JEE CourseClass - 11 NEET CourseClass - 11 JEE CourseClass - 10 Foundation NEET CourseClass - 10 Foundation JEE CourseClass - 10 CBSE CourseClass - 9 Foundation NEET CourseClass - 9 Foundation JEE CourseClass -9 CBSE CourseClass - 8 CBSE CourseClass - 7 CBSE CourseClass - 6 CBSE Course
Offline Centres

Q.

A compound X on heating gives a colorless gas. The residue is dissolved in water to obtain Y. Excess carbon dioxide is bubbled through an aqueous solution Y and Z is formed. Z on gently heating gives back X. The compound X is?


see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.
An Intiative by Sri Chaitanya

a

CaCO3

b

Na2CO3

c

Ca(HCO3) 2

d

K2CO3 

answer is A.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

JEE

NEET

NEET

Foundation JEE

Foundation JEE

Foundation NEET

Foundation NEET

CBSE

CBSE

Detailed Solution

Concept- In response to the inquiry, chemical X is produced when a colorless gas is heated. It's carbon dioxide that is that colorless gas.
The responses to the question can be written as follows:
When compound X is heated, carbon dioxide, an invisible gas, is produced along with the residue (Calcium Oxide) .
CaCO 3 → Δ CaO+ CO 2 ↑  
To produce the desired result, the residue (Calcium Oxide) is dissolved in water (Calcium Hydroxide) .
CaO+ H 2 O→Ca (OH) 2  
A surplus of carbon dioxide bubbles through an aqueous solution of Y (calcium hydroxide) , forming Z. (Calcium Bicarbonate) .
Ca (OH) 2 +2 CO 2 → Excess   Ca HCO 3 2  
Z (Calcium Bicarbonate) returns to X after being gently heated (Calcium Carbonate) . Ca HCO 3 2 → Δ CaCO 3 + CO 2 ↑+ H 2 O  
The aforementioned responses show that the compound
X   is CaCO 3   - Calcium carbonate
Y   is Ca (OH) 2   - Calcium hydroxide
Z   is Ca HCO 3 2   - Calcium bicarbonate
The molecule is calcium carbonate; hence option (1) is the correct response. − CaCO 3  
Hence, the correct answer is option 1.
 
Watch 3-min video & get full concept clarity
score_test_img

courses

No courses found

Related Blogs
Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation
Result Producing online coaching for JEE/NEET of south India
Largest All India Test Series for JEE/NEET
Best Online Course for IIT JEE
Best Online Course for NEET
Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!

Related Blogs
Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation
Result Producing online coaching for JEE/NEET of south India
Largest All India Test Series for JEE/NEET
Best Online Course for IIT JEE
Best Online Course for NEET
Best Online Course for CBSE

best study material, now at your finger tips!

  • promsvg

    live classes

  • promsvg

    progress tracking

  • promsvg

    24x7 mentored guidance

  • promsvg

    study plan analysis

download the app

gplay
mentor

Download the App

gplay
whats app icon
personalised 1:1 online tutoring