------- surfactants perform well over a wide range water hardness and PH?
------- surfactants perform well over a wide range water hardness and PH?
Cationic | |
Anionic | |
Neutral | |
Nonionic |
پاک اسٹڈی لائبریری اپنی خدمات کو بہتر کرنے کے لئے نئے سوفٹ وئیر انسٹال کررہی ہے ۔ اس لئے آئندہ کچھ دن آپ کو کچھ صفحات تک رسائی میں مشکلات کا سامنا ہوسکتا ہے ۔ جس کے لئے ہم معذرت خواہ ہیں۔
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Chemistry mcqs
Zn(s)/Zn+2(aq) 1M | | Cu+2(aq) 1M/Cu(s) is representation of reaction in-------?
Zn(s)/Zn+2(aq) 1M | | Cu+2(aq) 1M/Cu(s) is representation of reaction in-------?
Voltaic cell | |
Nelsons cell | |
Daniel cell | |
Downs cell |
Without suction pump filtration is ---------?
Without suction pump filtration is ---------?
All are possible | |
Fast process | |
Rapid process | |
Slow process |
With impurities like P and S the open hearth furnace is lined with ?
With impurities like P and S the open hearth furnace is lined with ?
Fe2O3 | |
FeO | |
CaO MgO | |
SiO2 |
Why does Ethyl Alcohol show high boiling point then Acetone?
Why does Ethyl Alcohol show high boiling point then Acetone?
Due to Hydrogen bonding | |
Due to high molecular weight | |
Due to its Acidic nature | |
Due to its Low molecular weight |
Why do we determined the boiling point of a liquid?
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
Who used the term Concentrationwindow to draw the arbitrary lines of demarcation
Dr.A.Walash | |
Schwartz | |
S.E.Manhan | |
Einstein |
Who made volume and pressure correction to explain deviation of gases from ideal behaviour ?
Who made volume and pressure correction to explain deviation of gases from ideal behaviour ?
Charles | |
Clausius | |
Boltzman | |
Vander waal |
Which type of bond is formed by overlap of p orbitals --------?
Which type of bond is formed by overlap of p orbitals --------?
Neither | |
Pi | |
Both | |
Sigma |
Which substance can be used for disinfecting water ?
Which substance can be used for disinfecting water ?
Ozone | |
Alums | |
All | |
KMnO4 |
Which statement is wrong ?
Which statement is wrong ?
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 | |
CFCs play effective role in removing O3 in the stratosphere |
Which statement is incorrect about catalyst----------?
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 ?
Which statement is consistent with Hunds rule ?
There is maximum of two electrons is an orbital. | |
The electrons in the same atom cannot have the same four quantum numbers | |
None | |
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. |
Which state of matter has the lowest density ?
Which state of matter has the lowest density ?
Liquid | |
Solid | |
Plasma | |
Gas |
Which specie has unpaired electrons in antibonding molecular orbitals--------?
Which specie has unpaired electrons in antibonding molecular orbitals--------?
B2 | |
N2-2 | |
O2+2 | |
O2-2 |
Which solids are called true solids --------?
Which solids are called true solids --------?
Metallic | |
Crystalline | |
Vitreous | |
Amorphous |
Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution ?
Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution ?
0.0002M HCI | |
0.2 mole of NaCI with 0.2 mole of HNO3 | |
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?
Which set of quantum numbers is not allowed?
n=2,l=1,m1=0,ms=+1/2 | |
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 |
Which sequence of steps is correct for the manufacture of cement ?
Which sequence of steps is correct for the manufacture of cement ?
mixing heating grinding crushing | |
crushing mixing heating grinding and mixing | |
crushing grinding mixing heating | |
crushing heating mixing grinding |
Which Oxide of Manganese is amphoteric?
Which Oxide of Manganese is amphoteric?
Mn2O3 | |
Mn2O7 | |
MnO2 | |
MnO |
Which order of reaction obeys the relation t1/2 = 1/Ka----------?
Which order of reaction obeys the relation t1/2 = 1/Ka----------?
Zero order | |
Third order | |
First order | |
Second order |
Which one shows high %age of the ionic character ?
Which one shows high %age of the ionic character ?
HCI | |
HBr | |
H2O | |
HF |
Which one of the followings possesses melting point below 0°C?
Which one of the followings possesses melting point below 0°C?
Phosphorus | |
Bismuth | |
Nitrogen | |
Carbon |
Which one of the following will be sulphonated readily ?
Which one of the following will be sulphonated readily ?
Nitrobenzene | |
Toluene | |
Benzene | |
Chlorobenzene |
Which one of the following substances conducts electricity by the movement of ions ?
Which one of the following substances conducts electricity by the movement of ions ?
Graphite | |
Molten sodium chloride | |
Mercury | |
Copper |