Email
Chat with tutor
logo

Ask Questions, Get Answers

X
 
Answer
Comment
Share
Q)

A mixture of Al and Zn weighing 1.67g was completely dissolved in acid and evolved 1.69litre of $H_2$ at NTP.What was the weight of Al in original mixture?

$(a)\;1.25g\qquad(b)\;2.5g\qquad(c)\;1g\qquad(d)\;2g$

1 Answer

Comment
A)
Let 'a'g and 'b'g are weights of Al and Zn in mixture
$a+b=1.67$--------(1)
Meq of Al+Meq of Zn=Meq of $H_2$
$\large\frac{a}{\Large\frac{27}{3}}$$\times 1000+\large\frac{b}{\Large\frac{65}{2}}$$\times 1000=\large\frac{1.69}{\Large\frac{22.4}{2}}$$\times 1000$-----(2)
From equation (1) & (2)
$a=1.25g\qquad Al$
$b=0.42g\qquad Zn$
Hence (a) is the correct answer.
Help Clay6 to be free
Clay6 needs your help to survive. We have roughly 7 lakh students visiting us monthly. We want to keep our services free and improve with prompt help and advanced solutions by adding more teachers and infrastructure.

A small donation from you will help us reach that goal faster. Talk to your parents, teachers and school and spread the word about clay6. You can pay online or send a cheque.

Thanks for your support.
Continue
Please choose your payment mode to continue
Home Ask Homework Questions
Your payment for is successful.
Continue
Clay6 tutors use Telegram* chat app to help students with their questions and doubts.
Do you have the Telegram chat app installed?
Already installed Install now
*Telegram is a chat app like WhatsApp / Facebook Messenger / Skype.
...