MCQOPTIONS
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MCQOPTIONS
This section includes 1262 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 701. |
In the production of wrought iron Mg Si and P are removed in the form of___________________? |
| A. | oxides |
| B. | silicates |
| C. | slag |
| D. | carbonates |
| Answer» D. carbonates | |
| 702. |
K2 (Cu(CN)4) which one is correct___________________? |
| A. | Potassium tetra cyano cupperate |
| B. | Co-ordination number is 2 |
| C. | Ligand is positively charged |
| D. | Central atom is present in avionic sphere |
| Answer» E. | |
| 703. |
When light is exposed to transition element then electrons jump from lower orbitals to higher orbitals in______________________? |
| A. | orbitals of f-subshell |
| B. | orbitals of d-subshell |
| C. | orbitals of p-subshell |
| D. | both A & B |
| Answer» E. | |
| 704. |
Industrial materials and thermal power stations are coated with______________________? |
| A. | Polyester resins |
| B. | Epoxy paints |
| C. | Polyamide resins |
| D. | Polyvinyl chloride |
| Answer» C. Polyamide resins | |
| 705. |
The species which donate two electron pairs in a coordination compound is called__________________? |
| A. | The species which donate two electron pairs in a coordination compound is called__________________? |
| B. | mono-dentate ligand |
| C. | poly-dentate ligand |
| D. | bi-dentate ligand |
| Answer» E. | |
| 706. |
When a compound of transition element is dissolved in a solution of salt then it produces____________________? |
| A. | simples ions |
| B. | complex ions |
| C. | double salts |
| D. | strong anions |
| Answer» C. double salts | |
| 707. |
Non-stoichiometric compounds of transition elements are called___________________? |
| A. | hydrates |
| B. | hydrides |
| C. | binary compounds |
| D. | interstitial compounds |
| Answer» E. | |
| 708. |
The oxidation state of transition elements is usually _______________________? |
| A. | variable |
| B. | constant |
| C. | single |
| D. | infinite |
| Answer» B. constant | |
| 709. |
Coordination number of the transition element in [Pt Cl NO2 (NH3)4]2- is____________________? |
| A. | 2 |
| B. | 6 |
| C. | 4 |
| D. | 8 |
| Answer» C. 4 | |
| 710. |
The oxidation number of central metal atom in [Ni(CO)4] is_________________? |
| A. | 0 |
| B. | 2 |
| C. | 4 |
| D. | 6 |
| Answer» D. 6 | |
| 711. |
The specie which donates electrons to central metal atom in coordination sphere is called____________________? |
| A. | anion |
| B. | cation |
| C. | Ligand is positively charged |
| D. | acid |
| Answer» D. acid | |
| 712. |
Right half cell contains _____________ electrode? |
| A. | A1 |
| B. | Zn |
| C. | Cu |
| D. | Fe |
| Answer» D. Fe | |
| 713. |
Which of the following can form a chealate______________________? |
| A. | ammine |
| B. | oxalato |
| C. | carbonyl |
| D. | cyano |
| Answer» C. carbonyl | |
| 714. |
The compound or complex ion which has a ring in its structure__________________? |
| A. | polydentate ligand |
| B. | chelate |
| C. | monodentate ligand |
| D. | hydrate |
| Answer» C. monodentate ligand | |
| 715. |
In K2Cr2O7 the oxidation number of chromium is____________________? |
| A. | 7 |
| B. | 6 |
| C. | -7 |
| D. | -6 |
| Answer» C. -7 | |
| 716. |
The reduction potential Zn is_________________? |
| A. | 0.76 |
| B. | -0.76 |
| C. | -0.55 |
| D. | 0.55 |
| Answer» C. -0.55 | |
| 717. |
Salt bridge transfers_______________? |
| A. | electrons |
| B. | anion |
| C. | current |
| D. | ions |
| Answer» E. | |
| 718. |
Electrode potential of Zn is__________________? |
| A. | oxidation |
| B. | reduction |
| C. | oxidation-reduction |
| D. | depends on the nature of the coupled electrode |
| Answer» E. | |
| 719. |
The half cells are interconnected through________________? |
| A. | wire |
| B. | salt bridge |
| C. | electric circuit |
| D. | no connection exists |
| Answer» C. electric circuit | |
| 720. |
E0red of an element cab be calculated by comparing it with _____________________? |
| A. | New electrode of same element |
| B. | SHE |
| C. | 1M solution of ions of respective element |
| D. | 2M solution of HCI |
| Answer» C. 1M solution of ions of respective element | |
| 721. |
Percentage of sulfuric acid in lead accumulator is__________________? |
| A. | 40% |
| B. | 25% |
| C. | 30% |
| D. | 50% |
| Answer» D. 50% | |
| 722. |
Potential of SHE is considered as__________________? |
| A. | zero |
| B. | unity |
| C. | constant |
| D. | multiple of 1 |
| Answer» B. unity | |
| 723. |
Shielding effect across the period ________________? |
| A. | Increases |
| B. | Decreases |
| C. | Constant |
| D. | None |
| Answer» D. None | |
| 724. |
Which of the following element act as inert electrode________________? |
| A. | Cu |
| B. | Ag |
| C. | Pt |
| D. | None |
| Answer» D. None | |
| 725. |
Voltaic cell can be recharged by______________? |
| A. | by addition of fresh solution |
| B. | by replacing external circuit with external source of electricity |
| C. | by removal of solution |
| D. | by heating it |
| Answer» C. by removal of solution | |
| 726. |
Chemical used in salt bridge is________________? |
| A. | KOH |
| B. | KCI |
| C. | KNO3 |
| D. | KBr |
| Answer» C. KNO3 | |
| 727. |
58.5g of of NaCl per 1 dm3 of solution of NaCl in water the concentration of solution will be___________________? |
| A. | 0.1 M |
| B. | 1 m |
| C. | 1 M |
| D. | 0.1 N |
| Answer» D. 0.1 N | |
| 728. |
H2 gas in SHE is filled at pressure of___________________? |
| A. | 760mm of Hg |
| B. | 750mm of Hg |
| C. | 780mm of Hg |
| D. | 800mm of Hg |
| Answer» B. 750mm of Hg | |
| 729. |
Greater value of standard reduction potential smaller will be tendency______________? |
| A. | to form positive ions |
| B. | to form negative ions |
| C. | gain electrons |
| D. | all are possible |
| Answer» B. to form negative ions | |
| 730. |
List of elements based on hydrogen scale is called________________? |
| A. | periodic table |
| B. | groups |
| C. | periods |
| D. | electrochemical series |
| Answer» E. | |
| 731. |
In galvanic cell Zn acts as an anode so its value of standard reduction potential in comparison to coupled electrode would be________________? |
| A. | greater |
| B. | lesser |
| C. | sum of reduction and oxidation potentials |
| D. | none |
| Answer» B. lesser | |
| 732. |
10ml of alcohol dissolve in 90ml of water unit of concentration used is________________? |
| A. | % w/w |
| B. | % w/v |
| C. | % v/v |
| D. | % v/w |
| Answer» D. % v/w | |
| 733. |
If electricity is passed through CuSO4 solution by using Pt electrode then which of the following possible change occurs ? |
| A. | H2 is deposited at cathode |
| B. | Colour of the solution becomes fade |
| C. | Cu is deposited at anode |
| D. | All are possible |
| Answer» C. Cu is deposited at anode | |
| 734. |
Lead accumulators are_______________? |
| A. | secondary cell |
| B. | primary cell |
| C. | voltaic cell |
| D. | both A & C |
| Answer» E. | |
| 735. |
Capacity of one lead accumulator cell is___________________? |
| A. | 1.5 volts |
| B. | 2 volts |
| C. | 3 volts |
| D. | 1 volts |
| Answer» C. 3 volts | |
| 736. |
Which has maximum oxidation number ? |
| A. | N |
| B. | Cr |
| C. | S |
| D. | Mn |
| Answer» E. | |
| 737. |
If the volume of solution is equal to sum of volumes of its all components then the solution_____________? |
| A. | will be an ideal solution |
| B. | will be non-ideal solution |
| C. | will show deviations from Raoults law |
| D. | both b & c |
| Answer» B. will be non-ideal solution | |
| 738. |
In an electrolytic cell current flows ? |
| A. | From cathode to anode in outer circuit |
| B. | From anode to cathode outside the cell |
| C. | From cathode to anode inside the cell |
| D. | both B & C |
| Answer» C. From cathode to anode inside the cell | |
| 739. |
Solution of Na2SO4 will be_________________? |
| A. | basic |
| B. | acidic |
| C. | neutral |
| D. | cannot be presicted without data |
| Answer» D. cannot be presicted without data | |
| 740. |
The solution which distils over with change in composition________________? |
| A. | ideal solution |
| B. | zeotropic solution |
| C. | azeotropic solution |
| D. | non-ideal solution |
| Answer» C. azeotropic solution | |
| 741. |
Which one of the following makes the bulk of hydrospheres content ? |
| A. | oceans |
| B. | glaciers & icecaps |
| C. | fresh water lakes and ponds |
| D. | All have equal distribution |
| Answer» B. glaciers & icecaps | |
| 742. |
Number of moles in 1 kg of solvent is called_________________? |
| A. | normality |
| B. | molarity |
| C. | molality |
| D. | mole fraction |
| Answer» D. mole fraction | |
| 743. |
Which of the following is not primary pollutant__________________? |
| A. | SO3 |
| B. | CO |
| C. | NO |
| D. | H2SO4 |
| Answer» E. | |
| 744. |
Concentration of solute molecule when they are in equilibrium with solid substance at particular temperature is called________________? |
| A. | saturated solution |
| B. | solubility |
| C. | unsaturated solution |
| D. | super saturated solution |
| Answer» C. unsaturated solution | |
| 745. |
1 molar solution of glucose in water contains weight of glucose________________? |
| A. | 180g/dm3 |
| B. | 170g/dm3 |
| C. | 190g/dm3 |
| D. | 195g/dm3 |
| Answer» B. 170g/dm3 | |
| 746. |
Which one of the following salt does not hydrolyzed________________? |
| A. | Na2SO4 |
| B. | AlCl3 |
| C. | CuSO4 |
| D. | NH4Cl |
| Answer» B. AlCl3 | |
| 747. |
Solution with maximum concentration of solute at given temperature is called________________? |
| A. | Super saturated solution |
| B. | unsaturated solution |
| C. | saturated solution |
| D. | dilute solution |
| Answer» D. dilute solution | |
| 748. |
Water of crystallization can be removed by________________? |
| A. | drying |
| B. | heating |
| C. | evaporation |
| D. | All of the above |
| Answer» C. evaporation | |
| 749. |
Homogeneous mixture of two or more than two compounds is called__________________? |
| A. | solution |
| B. | compound |
| C. | radical |
| D. | ion |
| Answer» B. compound | |
| 750. |
When common salt is dissolved in water ? |
| A. | Boiling point of water decrease |
| B. | Boiling point of water increase |
| C. | Boiling point of water remains same |
| D. | None of the above |
| Answer» C. Boiling point of water remains same | |