------- surfactants perform well over a wide range water hardness and PH?
------- surfactants perform well over a wide range water hardness and PH?
Nonionic | |
Neutral | |
Cationic | |
Anionic |
------- surfactants perform well over a wide range water hardness and PH?
Nonionic | |
Neutral | |
Cationic | |
Anionic |
Zn(s)/Zn+2(aq) 1M | | Cu+2(aq) 1M/Cu(s) is representation of reaction in-------?
Voltaic cell | |
Daniel cell | |
Nelsons cell | |
Downs cell |
Without suction pump filtration is ---------?
Rapid process | |
Slow process | |
Fast process | |
All are possible |
With impurities like P and S the open hearth furnace is lined with ?
CaO MgO | |
Fe2O3 | |
FeO | |
SiO2 |
Why does Ethyl Alcohol show high boiling point then Acetone?
Due to Hydrogen bonding | |
Due to its Low molecular weight | |
Due to its Acidic nature | |
Due to high molecular weight |
Why do we determined the boiling point of a liquid?
To check its Acidity and Basicity | |
None of These | |
To check its Purity and nature | |
To Check temperature |
Who used the term Concentrationwindow to draw the arbitrary lines of demarcation
Einstein | |
S.E.Manhan | |
Schwartz | |
Dr.A.Walash |
Who made volume and pressure correction to explain deviation of gases from ideal behaviour ?
Clausius | |
Vander waal | |
Boltzman | |
Charles |
Which type of bond is formed by overlap of p orbitals --------?
Pi | |
Both | |
Neither | |
Sigma |
Which substance can be used for disinfecting water ?
All | |
KMnO4 | |
Alums | |
Ozone |
Which statement is wrong ?
CFCs play effective role in removing O3 in the stratosphere | |
the amount of ozone layer is greater in the region close to the equator | |
in the equatorial region it acts as pollutant | |
ozone acts as filter for UV radiations |
Which statement is incorrect about catalyst----------?
specific in action | |
it affects specific rate constant | |
decrease activation energy | |
it is used in smaller amount |
Which statement is consistent with Hunds rule ?
None | |
The electrons in the same atom cannot have the same four quantum numbers | |
Electrons fill orbitals with parallel spins until all the orbitals of the same energy are half filled then they go into sub-shells with anti-parallel (opposite) spin. | |
There is maximum of two electrons is an orbital. |
Which state of matter has the lowest density ?
Liquid | |
Plasma | |
Gas | |
Solid |
Which specie has unpaired electrons in antibonding molecular orbitals--------?
N2-2 | |
O2-2 | |
O2+2 | |
B2 |
Which solids are called true solids --------?
Crystalline | |
Amorphous | |
Vitreous | |
Metallic |
Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution ?
0.2 mole of NaCI with 0.2 mole of HNO3 | |
0.0002M HCI | |
0.4 mole of NH3 with 0.2 mole of HCI | |
0.4 mole of CH3COOH with 0.4 mole of NaOH |
Which set of quantum numbers is not allowed?
n=2,l=2,m1=1,ms-1/2 | |
n=2,l=0,m1=0,ms-1/2 | |
n=2,l=1,m1-1,ms=+1/2 | |
n=2,l=1,m1=0,ms=+1/2 |
Which sequence of steps is correct for the manufacture of cement ?
mixing heating grinding crushing | |
crushing grinding mixing heating | |
crushing mixing heating grinding and mixing | |
crushing heating mixing grinding |
Which Oxide of Manganese is amphoteric?
Mn2O3 | |
Mn2O7 | |
MnO2 | |
MnO |