- 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
67 - General Chemistry Questions Answers
the position of both an electron and a helium atom is known within 1nm. further the momentum of the electron is known within 5*10-26 kgm/s. the minimum uncertainity in the measurement of the momentum of the helium atom is
according to Heisenberg principle product of uncertainity in position and momentum of a particle is greater than or equal to h/4π, since uncertanity in position of both the particle are same so same will be the momentum uncertainty minima.
the frequency of radiation emitted when the electron falls n=4 to n=1 in a hydrogen atom will be (given ionisation energy of H =2.18*I0-18 J/atom )
ans=3.08*1015
for n = 1 E = 2.18*10-18
for n = 4 E = 2.18*10-18/16
so hν = 15*2.18*10-18/16
so ν = 15*2.18*10-18/16*6.634*10-34
so ν = 3.08*1015
which of the following has highest energy?
1)S-S
2)O-O
3)Se-Se
4)Te-Te
O-O 498.36 kJ/mole
S-S 425.30 kJ/mole
Se-Se 332.6 kJ/mole
Te-Te 259.8 kJ/mole
which of the following has zero dipole moment? and how?
1)1-butane
2)2-methyl, 1-propyl
3)cis 2-butane
4)trans 2-butane
i think it should be trans 2 butene
1-what is the hybridisation of s and p in s8 and P4 respectively?
sp3 both
THE STRUCTURE OF HYDROGEN PEROXIDE IS NON-PLANER.HOW?
The structure of HYDROGEN PEROXIDE is like an open book. O-O bond is present in the joint and both H atom on the opposite side. Hybridisation will be sp3 for all bonds
A mixture of FeO and Fe304 when heated in air to constant weight gains 5% in its weight. The % of FeO in the sample
let FeO = x gm and FeO+Fe2O3= y gm so FeO = [72/(72+160)]*y and Fe2O3 = [160/(160+72)]*y
2FeO + 1/2O2 ----------> Fe2O3
so amount of Fe2O3 formed by x gm FeO = 160x/144
similarly amount of Fe2O3 formed by [72/(72+160)]*y gm FeO = 160 [72/(72+160)]*y/144
so total Fe2O3 = 160x/144 + 160 [72/(72+160)]*y/144 + [160/(160+72)]*y = 160x/144 + [160*72/232]y/144 + 160y/232
now according to the given condition {[160x/144 + [160*72/232]y/144 + 160y/232}/{x+y) = 105/100
now solve
What is the volume of a gas at NTP and STP ?
question is irrelevant, amount of gas is not given
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
Sir the formula for converting volume in STP condition is given in my book if volume is not given in STP condition. But my problem is that I don't know how to use it . please explain me this formula and I request you to give me Ques. related to this formula.
Formula for converting volume at temperature T to STP is
P1V1/T1 = P2V2/T2