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the density of KBr is 2.75g cm-3. the length of edges of the unit cell is 654pm predict the type of cubic lattice to which unit cell of KBr belongs

Posted by G R 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Priyanshu Singh 7 years, 1 month ago

We know that, Density=Z.M/a^3N° Where,M~molar mass a~edge of unit cell N°~avagadro number Given- a=654×10^(-12)m d=2.75gcm-3=2.75×10^6 g m-3, M=120 then,we get Z=4

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A certain quantity of a gas occupied 100 ml when collected over water at 15°C and 750mm pressure. It occupies 91.9 ml in dry state at NTP. Find the V.P. Of water at 15°C......?

Posted by Sushant Pandey 7 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why k2PtCl6 exist but K2NiCl6 doesn't?

Posted by Jeetu Kumar 5 years, 8 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

what is the symbol of aldehyde

Posted by Jassika Sohal 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Mahipal Choudhary 7 years, 1 month ago

When CHO group is present then there is an aldehyde

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Dhritideepa Gorai 7 years, 1 month ago

R-CHO

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How to convert haloalkanes i want to learn

Posted by Sapna Kumari 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Mohit Sepat 7 years, 1 month ago

To which and from which

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ANSWER

Ammonia is more basic than ammonium .explain

Posted by Rajat Shukla 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Ramendra Somendra 7 years, 1 month ago

Due to the presence of lone pair on NH3 molecule

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Tell me the difference between metallic conductor and electrolytic conductor.

Posted by Papay Kumari 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Aditya Kumar Mishra 7 years, 1 month ago

In mettalic conductor electrons flow via a metal but incase of electrolytic conductor electrons flow via electrolytic solitions

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Tell me the difference between ideal solution and non ideal solution.

Posted by Papay Kumari 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Aditya Kumar Mishra 7 years, 1 month ago

above answer is quite incomplete it is for entire range of concentrations

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Harshit Kumar 7 years, 1 month ago

ideal soln obey raoult law and non ideal siln not obey raoult law

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In adsorption the concentration of the adsorbate increase only at the surface of the adsorbate ,while in adsorption the concentration is uniform throughout the bulk of the solid. Can anyone explain this ???

Posted by Jayaasrii?? Jayaasrii 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Keerthana Raj 7 years, 1 month ago

This is because adsorption is a surface phenomenon whereas absorption occurs with the whole body. Its like the difference between dipping chalk in water and soaking a sponge in water.

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Lab manual practicals

Posted by Akash राजपूत 7 years, 1 month ago

CBSE > Class 12 > Chemistry

3 answers

Mohit Sepat 7 years, 1 month ago

Tel

1Thank You

Mahipal Choudhary 7 years, 1 month ago

Not getting your question

0Thank You

Yo Yo Honey Singh ? 7 years, 1 month ago

Kya lab manual practice. Speak clearly what you want to ask

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What is baking soda?

Posted by R K 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Yo Yo Honey Singh ? 7 years, 1 month ago

12th class me padh rahe ho baking soda kya hota hai nahi pata???

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???Give the reason for bleaching action of Cl2❔❓❔❓???. [NEET 2013]

Posted by Yo Yo Honey Singh ? 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

H T 7 years, 1 month ago

Cl2+ H2o. Gives. 2hcl +0 it is due to nascent oxygen

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Kiara Khurrana 7 years, 1 month ago

u r back karishma happy to see u

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Why flourine show +1oxidation state in HOF

Posted by Vishal Panwar 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Mahipal Choudhary 7 years, 1 month ago

It is an exception for fluorine

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Mahipal Choudhary 7 years, 1 month ago

Because flourine is the most electronegative element

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Some important question for fA 3

Posted by Arshdeep Singh 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Mohit Sepat 7 years, 1 month ago

Yes or agar h bhi toh chpter btao

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Yo Yo Honey Singh ? 7 years, 1 month ago

Fa khatm ho gya hai CCE pattern nahi raha

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Is tertiary alcohol give oxidation process ?????

Posted by Saloni S 7 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is non ideal solution ?

Posted by Ankit Yadav 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Sudhakar Mishra 7 years, 1 month ago

Non ideal solution is that solution which is not follow roults law

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Arnav Singh 7 years, 1 month ago

A solution which obeys raults law over entire range of concentration

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Why is sodium kept in kerocine oil?

Posted by Ankit Yadav 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

H T 7 years, 1 month ago

Not water

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Why does the zirconium and hafnium have same size?

Posted by Varsha Verma 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Kiranpreet Kaur 7 years, 1 month ago

Due to lanthanoid contraction

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ANSWER

What is addition compound

Posted by Aditya Sharma 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Aditya Sharma 7 years, 1 month ago

Addition of two salts in aqueous solution and then water is removed by heating , the remaining is known as addition compound.

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Why KMnO4 is coloured ?

Posted by Rakesh Chand 7 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

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M/20 oxalic acid

Posted by Kajal Singh 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Mohit Sepat 7 years, 1 month ago

What ??????oxalic acid

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Cr^+2 is a stronger reducing agent. Why?

Posted by Saniya Verma 7 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

On the basis of dispersion phase what type is micellel

Posted by Harshit Joshi 7 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why is Ka2 is less than ka1 for H2SO4 in water ❓❔

Posted by Yo Yo Honey Singh ? 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Anu Deepshikha 7 years, 1 month ago

H2SO4 IS A VERY STRONG ACID IN WATER MAINLY BECAUSE ITS FIRST IONIZATION TI H3O+ AND HSO4- IS LARGE. THE IONIZATION HSO4-TO H3O AND SO4 2- IS VERY VERY SMALL

2Thank You

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Why is amines less acidic than alcohol in comparable molecular mass

Posted by Neeraj Dubey 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Saloni S 7 years, 1 month ago

Since O is more electronegative than N, O can accommodate the negative charge more easily than N. As a result, the amide ion is less stable than the alkoxide ion. Hence, amines are less acidic than alcohols of comparable molecular masses.

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ANSWER

What is despersion phase?

Posted by Faizan Ansari 7 years, 1 month ago

CBSE > Class 12 > Chemistry