------- surfactants perform well over a wide range water hardness and PH?
------- surfactants perform well over a wide range water hardness and PH?
 | Neutral |
| Cationic |
 | Nonionic |
| Anionic |
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-------?
| Nelsons cell |
| Downs cell |
| Daniel cell |
| Voltaic cell |
Without suction pump filtration is ---------?
Without suction pump filtration is ---------?
| Slow process |
| Fast process |
| All are possible |
| Rapid 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 |
| CaO MgO |
| FeO |
| SiO2 |
Why does Ethyl Alcohol show high boiling point then Acetone?
Why does Ethyl Alcohol show high boiling point then Acetone?
| Due to its Low molecular weight |
| Due to its Acidic nature |
| Due to high molecular weight |
| Due to Hydrogen bonding |
Why do we determined the boiling point of a liquid?
Why do we determined the boiling point of a liquid?
| To Check temperature |
| None of These |
| To check its Acidity and Basicity |
| To check its Purity and nature |
Who used the term Concentrationwindow to draw the arbitrary lines of demarcation
Who used the term Concentrationwindow to draw the arbitrary lines of demarcation
| S.E.Manhan |
| Einstein |
| Schwartz |
| Dr.A.Walash |
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 ?
| Boltzman |
| Vander waal |
| Charles |
| Clausius |
Which type of bond is formed by overlap of p orbitals --------?
Which type of bond is formed by overlap of p orbitals --------?
| Sigma |
| Both |
| Pi |
| Neither |
Which substance can be used for disinfecting water ?
Which substance can be used for disinfecting water ?
| Alums |
| Ozone |
| All |
| KMnO4 |
Which statement is wrong ?
Which statement is wrong ?
| CFCs play effective role in removing O3 in the stratosphere |
| in the equatorial region it acts as pollutant |
| ozone acts as filter for UV radiations |
| the amount of ozone layer is greater in the region close to the equator |
Which statement is incorrect about catalyst----------?
Which statement is incorrect about catalyst----------?
| it is used in smaller amount |
| specific in action |
| it affects specific rate constant |
| decrease activation energy |
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 |
| Vitreous |
| Amorphous |
| Crystalline |
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 ?
| 0.4 mole of CH3COOH with 0.4 mole of NaOH |
| 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 |
Which set of quantum numbers is not allowed?
Which set of quantum numbers is not allowed?
| n=2,l=0,m1=0,ms-1/2 |
| n=2,l=1,m1-1,ms=+1/2 |
| n=2,l=2,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 ?
Which sequence of steps is correct for the manufacture of cement ?
| crushing heating mixing grinding |
| crushing mixing heating grinding and mixing |
| crushing grinding mixing heating |
| mixing heating grinding crushing |
Which Oxide of Manganese is amphoteric?
Which Oxide of Manganese is amphoteric?
| Mn2O7 |
| Mn2O3 |
| MnO |
| MnO2 |