- Organic Chemistry
- Aldehydes and Ketones
- Alkyl Halides, Alcohols and ethers
- Amines and other nitrogen compounds
- Aromatic Chemistry
- Carbohydrates, Amino acids, protein, Vitamin and Fat
- Carboxylic acids and its derivatives
- Chemistry in daily life
- General Mechanism in organic compounds
- Hydrocarbons
- Nomenclature and isomerism
216 - Chemistry Questions Answers
Is flurine has more oxidising power ?
yes it is a very good oxidising agent
Is there any difference b/w SULPHUR AND SULFUR ??
no there is no difference
In diamond,carbon atom occupy FCC lattice points as well as alternate tetrahedral voids.If edge length of the unit cell is 356pm,then radius of carbon atom is?
for fcc lattice a√2 = 4r
how many lattice points are there in one unit cell of face centered tetragonal
8 corners contributing 1/8
6 faces contributing 1/2
IN A GIVEN COMPD THE BONDING FORCES ARE AT SHORT RANGE & ARE SPHERICALLY DISTRIBUTED . THE TYPE OF BONDING REFERRED TO IS C/A
A) COVALENT
B) METALLIC
C) HYDROGEN
D) IONIC
the formation of covalent bond requires overlapping of partially occupied short-range repulsive potential due to the distortion of the electron clouds
so answer will be covalent
THE CONSTANT a IN VAN DER WALL'S EQN IS MAXM IN
A) He
B) NH3
C) CO2
D) N2
| Carbon dioxide | a = 3.640 |
| Helium | a = 0.03457 |
| Nitrogen | a = 1.408 |
| Ammonia | a = 4.225 |
more ideal gases has lower values of a
THE PRESSURE OF ATMOSPHERE AIR IS 720 mm . THE PRESSURE OF WATER VAPOUR IN THE AIR IS
A) 5.55
B) 21
C) 18
D) ZERO
In this question atmospheric pressure should be given then
P0 - 720 mm will be the answer.
the heat of formation of MgO, Al2O3, , And SiO2 Are -692, -1676, -911 kJ/mol . most stable oxide is
A) MgO
B) Al2O3
C) SiO2
D) can't be predicted
Al2O3
what will be the conc of nitrate ion when 400ml of 0.1 M AgNO3 is mixed with 100 ml of 0.2 m BaBr2
no. of miligm. eq. of AgNO3 = 400*0.1 = 40
no. of miligm. eq. of BaBr2 = 100*0.2*2 = 40
so no of miligm. eq. of Ba(NO3)2 = 40 so no. of milimoles of Ba(NO3)2 = 20
so [NO3-] = 20*2/500 = .08 M
WHICH OF THE FOLLOWING HAS LOWEST BOILING PT. (HARY. PMT 2003)
1) NaCl
2) CuCl
3) CuCI2
4) CsCl
SIR ANSWER GIVEN IS(3) . BUT AS THE NO. OF IONS IS MAX IN CuCl2 SO IT SHOULD HAVE MAX BP . THEN WHY ITS BP WILL BE MIN. ??
The only possibility is that the dissociation of the salt CuCl2 is low yet NaCl and CsCl are strongly dissociable salts. But CuCl should be less dissociable than CuCl2 . On this basis answer should be CuCl.
It is also probable that the question will be highest boiling point.