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chemistery

(47 Posts)

By dilip choudhary

chemistery

This discussion has been closed. You may post your queries in General SSC Discussion
Unanswered All
Mary Spandana
Posted on Jun 18, 2018 12:28 PM

Match the column - I (type of solid) with column - II (example) and select the correct option.

Column - I
 Column - II
P. Molecular solid 1. Silicic oxide
Q. Ionic solid 2. Copper
R. Metallic solid 3. Kickerite
S. Covalent network solid 4. Naphthalene

 
P - 4, Q - 3, R - 2, S - 1
P - 1, Q - 3, R - 2, S - 4
P - 2, Q - 3, R - 4, S - 1
P - 4, Q - 2, R - 3, S - 1
P - 1, Q - 2, R - 3, S - 4
Please type your answer before submitting.
Mary Spandana

Fullerence has carbon atoms which are bonded through covalent bonds then how is it a molecelar solid

Mary Spandana
Posted on Jun 18, 2018 12:26 PM

Which of the following statements is/are not correct about halite structure?
1. Cations occupy the lattice points of expanded fcc lattice and the anions occupy all the octahedral holes.
2. The limiting radius ratio is in between 0.414 and 0.732.
3. The coordination numbers of cation and anion are 4 and 8 respectively.
4. The general formula of ionic compounds having halite structure is AB.

 
1 and 2
1 and 3
1 and 4
2 and 3
3 and 4
Please type your answer before submitting.
Mary Spandana

Isn't the 2nd option right too?

Anirudh Kalla
Shared from IISER Mock - 1 on Jun 10, 2018 4:53 PM

A solution is 0.1 M in each of Pb2+ and Fe2+ ions. If powders of lead and iron are added in this solution, which of the following facts comes out to be true?

 
More of Fe and Pb2+ ions are formed.
More of Pb and Fe2+ ions are formed.
Concentrations of Pb2+ and Fe2+ ions are increased.
Concentrations of Pb2+ and Fe2+ ions are decreased.
Please type your answer before submitting.
Anirudh Kalla

Since the volume remains virtually constant wont the increase in conc. be a direct implication of increase in the number of ions

Aravind
Shared from EAPCET Mock - 3 on Apr 28, 2018 7:45 AM

Which of the following statements about halogens is correct?

 
F2 has a higher bond dissociation energy than Cl2.
The electron affinities are in the order: F > Cl > Br > I.
HI is the strongest hydrohalic acid.
Van der Waals forces are the weakest in iodine.
All halogens show variable oxidation states.
Please type your answer before submitting.
Aravind

Hydrofluoric acid is considered a weak acid, while the other hydrohalic acids (HCl, HBr, HI) are strong acids. ... source:googloe

Syed Mustafa
Posted on Apr 27, 2018 11:58 PM

Which of the following species are isoelectronic?

 
N, O, F, Ne
Na+, Mn2+, Al3+, Si4+
Cl-, Ar, Ca2+, Ti4+
Be, Mg2+, Ca, Si2+
Please type your answer before submitting.
Syed Mustafa

Which of the following species are isoelectric