------- surfactants perform well over a wide range water hardness and PH?
------- surfactants perform well over a wide range water hardness and PH?
 | Cationic |
 | Nonionic |
| Anionic |
| Neutral |
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-------?
| Daniel cell |
| Voltaic cell |
| Downs cell |
| Nelsons cell |
Without suction pump filtration is ---------?
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 ?
With impurities like P and S the open hearth furnace is lined with ?
| FeO |
| SiO2 |
| Fe2O3 |
| CaO MgO |
Why does Ethyl Alcohol show high boiling point then Acetone?
Why does Ethyl Alcohol show high boiling point then Acetone?
| Due to its Acidic nature |
| Due to its Low molecular weight |
| 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 its Acidity and Basicity |
| To check its Purity and nature |
| None of These |
| 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
| S.E.Manhan |
| Schwartz |
| Einstein |
| 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 ?
| Vander waal |
| Boltzman |
| Clausius |
| Charles |
Which type of bond is formed by overlap of p orbitals --------?
Which type of bond is formed by overlap of p orbitals --------?
| Sigma |
| Neither |
| Both |
| Pi |
Which substance can be used for disinfecting water ?
Which substance can be used for disinfecting water ?
| Alums |
| All |
| KMnO4 |
| Ozone |
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----------?
| decrease activation energy |
| it affects specific rate constant |
| specific in action |
| it is used in smaller amount |
Which statement is consistent with Hunds rule ?
Which statement is consistent with Hunds rule ?
| None |
| There is maximum of two electrons is an orbital. |
| 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. |
Which state of matter has the lowest density ?
Which state of matter has the lowest density ?
| Gas |
| Liquid |
| Plasma |
| Solid |
Which specie has unpaired electrons in antibonding molecular orbitals--------?
Which specie has unpaired electrons in antibonding molecular orbitals--------?
| N2-2 |
| B2 |
| O2+2 |
| O2-2 |
Which solids are called true solids --------?
Which solids are called true solids --------?
| Vitreous |
| Amorphous |
| Crystalline |
| Metallic |
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 ?
| 0.2 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?
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=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 ?
| crushing grinding mixing heating |
| mixing heating grinding crushing |
| crushing mixing heating grinding and mixing |
| 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----------?
| Second order |
| First order |
| Third order |
| Zero order |
Which one shows high %age of the ionic character ?
Which one shows high %age of the ionic character ?
| HF |
| HCI |
| HBr |
| H2O |
Which one of the followings possesses melting point below 0°C?
Which one of the followings possesses melting point below 0°C?
| Bismuth |
| Carbon |
| Nitrogen |
| Phosphorus |
Which one of the following will be sulphonated readily ?
Which one of the following will be sulphonated readily ?
| Benzene |
| Nitrobenzene |
| Toluene |
| 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 ?
| Mercury |
| Copper |
| Molten sodium chloride |
| Graphite |