MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 1184 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 951. |
Elements with similar chemical properties appear in the_________________? |
| A. | Same family |
| B. | Same period |
| C. | p block elements |
| D. | Right upper corner |
| Answer» B. Same period | |
| 952. |
Elements which emit natural radioactivity are known as __________ ? |
| A. | Radio elements |
| B. | Active elements |
| C. | Radioactive elements |
| D. | Nuclear elements |
| Answer» D. Nuclear elements | |
| 953. |
Elements in the same vertical group of the periodic table have same_______________? |
| A. | Number of valence electrons |
| B. | Atomic number |
| C. | Atomic mass |
| D. | Atomic volume |
| Answer» B. Atomic number | |
| 954. |
Elements of group IA IIA are _________________? |
| A. | Electronegative |
| B. | Electropositive |
| C. | Neutral |
| D. | IA is electropositive while IIA is electronegative |
| Answer» C. Neutral | |
| 955. |
Elements having high I.P values are____________________? |
| A. | Metals |
| B. | Non metals |
| C. | Liquids |
| D. | Solids |
| Answer» C. Liquids | |
| 956. |
Electronic configuration of K is_________________? |
| A. | [Ar]4s2 |
| B. | [Ar]4s1 |
| C. | [Kr]5s1 |
| D. | [He]2s1 |
| Answer» C. [Kr]5s1 | |
| 957. |
Electron was discovered by? |
| A. | Michael Faraday |
| B. | James Maxwell |
| C. | Yuri Gagarin |
| D. | J.J Thomson |
| Answer» E. | |
| 958. |
Electronic Configuration of Calcium (Ca) atom may be written as________? |
| A. | Ne, 4p2 |
| B. | Ar, 4s2 |
| C. | Ne, 4s2 |
| D. | Kr,4p2 |
| Answer» C. Ne, 4s2 | |
| 959. |
Electrolysis of dilute solution of NaCl results at the anode_______________? |
| A. | sodium |
| B. | hydrogen |
| C. | chlorine |
| D. | oxygen |
| Answer» E. | |
| 960. |
Electrode potential of Zn is__________________? |
| A. | oxidation |
| B. | reduction |
| C. | oxidation-reduction |
| D. | depends on the nature of the coupled electrode |
| Answer» E. | |
| 961. |
Electricity in voltaic cell is produced due to_________________? |
| A. | neutralization |
| B. | oxidation |
| C. | reduction |
| D. | both B & C |
| Answer» E. | |
| 962. |
Electric bulb filament is made of__________? |
| A. | Copper |
| B. | Aluminum |
| C. | Lead |
| D. | Tungsten |
| Answer» E. | |
| 963. |
Effective volume is usually taken for ____________ ? |
| A. | 2 moles of gas |
| B. | 1 mole of gas |
| C. | 5 moles of gas |
| D. | 3moles of gas |
| Answer» C. 5 moles of gas | |
| 964. |
Each catalyst has_________________? |
| A. | Specificity |
| B. | Special structure |
| C. | Its own Ea |
| D. | all of above |
| Answer» E. | |
| 965. |
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 | |
| 966. |
During which process empty spaces between particles become minimum ? |
| A. | ionization |
| B. | condensation |
| C. | fusion |
| D. | evaporation |
| Answer» C. fusion | |
| 967. |
During sulphonation of benzene H2SO4 generates the electrophile _________________? |
| A. | HSO4- |
| B. | SO2 |
| C. | SO3 |
| D. | H+ |
| Answer» D. H+ | |
| 968. |
Dry distillation of calcium acetate results in the formation of_________________? |
| A. | formaldehyde |
| B. | acetaldehyde |
| C. | methane |
| D. | acetone |
| Answer» E. | |
| 969. |
Downs cell is used to prepare_________________? |
| A. | Sodium carbonate |
| B. | Sodium bicarbonate |
| C. | Sodium metal |
| D. | Sodium hydroxide |
| Answer» D. Sodium hydroxide | |
| 970. |
Distance at which attractive forces of hydrogen overcome repulsive forces is __________ ? |
| A. | 75.2pm |
| B. | 75.3pm |
| C. | 75.5pm |
| D. | 75.4pm |
| Answer» E. | |
| 971. |
Direct conversion of solids into vapours is called ___________________? |
| A. | Solvent extraction |
| B. | sublimation |
| C. | crystallization |
| D. | vaporization |
| Answer» C. crystallization | |
| 972. |
Different components of a mixture have different Rf values due to________________? |
| A. | Polar solvent used |
| B. | Combination of solvents used |
| C. | Their different distribution coefficients in the solvent |
| D. | Distributive law |
| Answer» D. Distributive law | |
| 973. |
Diameter of an atom is in the order of________________? |
| A. | 0.2m |
| B. | 0.2mm |
| C. | 0.2nm |
| D. | 0.2pm |
| Answer» D. 0.2pm | |
| 974. |
Deuterium reacts with oxygen to form________________? |
| A. | Hard water |
| B. | Heavy water |
| C. | Soft water |
| D. | Water gas |
| Answer» C. Soft water | |
| 975. |
Density of H2SO4 in lead accumulator is__________________? |
| A. | 1.25g/cm3 |
| B. | 1.3g/cm3 |
| C. | 1.20g/cm3 |
| D. | 1.15g/cm3 |
| Answer» B. 1.3g/cm3 | |
| 976. |
Dempsters mass spectrometer has number of zones / parts_________________? |
| A. | 5 |
| B. | 4 |
| C. | 3 |
| D. | 2 |
| Answer» B. 4 | |
| 977. |
Dehalogenation of ethyl tetrahalide will give____________________? |
| A. | ethene |
| B. | ethyne |
| C. | ethyl halide |
| D. | all of the above are possible |
| Answer» C. ethyl halide | |
| 978. |
Decrease in oxidation number is called__________________? |
| A. | oxidation |
| B. | reduction |
| C. | oxidation-reduction |
| D. | all of above represent same entity |
| Answer» C. oxidation-reduction | |
| 979. |
DAP (Diammonium hydrogen phosphate) contains ______________ plant nutrients? |
| A. | 60% |
| B. | 65% |
| C. | 70% |
| D. | 75% |
| Answer» E. | |
| 980. |
CuSO4 + Zn?ZnSO4+Cu is___________________? |
| A. | Spontaneous reaction |
| B. | Non-spontaneous reaction |
| C. | Endothermic |
| D. | Exothermic |
| Answer» B. Non-spontaneous reaction | |
| 981. |
Crystallization does not involve_______________? |
| A. | heating |
| B. | sublimation |
| C. | cooling |
| D. | vaporization |
| Answer» C. cooling | |
| 982. |
Crystals of Na2CO3. 10H2O when exposed to air_________________? |
| A. | Lose water and remain solid |
| B. | Gain water and remain solid |
| C. | Gain water and become liquid |
| D. | Remains unchanged |
| Answer» B. Gain water and remain solid | |
| 983. |
Crystallites are present in_________________? |
| A. | crystalline solids |
| B. | amorphous solids |
| C. | liquid crystals |
| D. | all of the above |
| Answer» C. liquid crystals | |
| 984. |
Crystalline solids can be identified easily from their ___________________? |
| A. | Sharp melting point |
| B. | Definite geometry |
| C. | Transition temperature |
| D. | Colour |
| Answer» B. Definite geometry | |
| 985. |
Crude oil is blackish coloured liquid produced after the decay of organic matter present between_________________? |
| A. | earth layer |
| B. | mountains |
| C. | sedimentary rocks |
| D. | rocks |
| Answer» D. rocks | |
| 986. |
Critical temperature for different gases is different and depends upon______________? |
| A. | Size of molecule |
| B. | Shape of molecule |
| C. | Intermolecular attractions |
| D. | All of the above |
| Answer» E. | |
| 987. |
Covalent network crystals have_____________? |
| A. | higher melting point then molecular crystals |
| B. | lower melting point then molecular crystals |
| C. | discrete molecules linked by Van der waals forces |
| D. | hydrogen bonding |
| Answer» B. lower melting point then molecular crystals | |
| 988. |
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 | |
| 989. |
Conversion of reactant into product in unit time is called________________? |
| A. | rate of forward reaction |
| B. | rate of backward reaction |
| C. | rate constant |
| D. | rate co-efficient |
| Answer» B. rate of backward reaction | |
| 990. |
Consider the following redox reaction. Zn+dil HNO3? Zn (NO3)2 + N2O + H2O The coefficient number of HNO3 in the equation is__________________? |
| A. | 6 |
| B. | 8 |
| C. | 10 |
| D. | 4 |
| Answer» D. 4 | |
| 991. |
Consider the following reaction- 3Cl2 + 6NaOH ? NaClO3 + 5NaCl + 3H2O This reaction is_______________? |
| A. | Displacement reaction |
| B. | Double displacement reaction |
| C. | Disproportionation reaction |
| D. | Reduction reaction |
| Answer» D. Reduction reaction | |
| 992. |
Consider the following reaction- 2KCIO3 + H2C2O4 + H2SO4 ? K2SO4 + 2H2O + 2CO2 + Oxide Which oxide of chlorine is produced in the above reaction ? |
| A. | Cl2O |
| B. | ClO2 |
| C. | Cl2O6 |
| D. | Cl2O7 |
| Answer» C. Cl2O6 | |
| 993. |
Conjugated base of a weak acid is_________________? |
| A. | weak |
| B. | strong |
| C. | moderately weak |
| D. | unstable |
| Answer» C. moderately weak | |
| 994. |
Concept of Triads was introduced by_______________? |
| A. | Dobereiner |
| B. | Newland |
| C. | Mendeleev |
| D. | Al-Razi |
| Answer» B. Newland | |
| 995. |
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 | |
| 996. |
Compounds of nitrogen and phosphorus are mostly________________? |
| A. | ionic |
| B. | covalent |
| C. | polar |
| D. | all varieties are possible |
| Answer» C. polar | |
| 997. |
Compounds having same molecular formula but differ in structural formula are called __________________? |
| A. | polymer |
| B. | monomer |
| C. | isomer |
| D. | allotropes |
| Answer» D. allotropes | |
| 998. |
Compounds attracted by applied strong magnetic field are called__________________? |
| A. | diamagnetic |
| B. | paramagnetic |
| C. | good conductor |
| D. | ferromagnetic |
| Answer» C. good conductor | |
| 999. |
Compound containing benzene ring in their structure are __________________? |
| A. | aliphatic |
| B. | aromatic |
| C. | carboxylic acid |
| D. | carbohydrates |
| Answer» C. carboxylic acid | |
| 1000. |
Common example of carbohydrates are__________________? |
| A. | Cellulose glycogen galactose |
| B. | Glyceraldehydes glucose peptone |
| C. | Glycerol phospho lipids collagen |
| D. | Legumin amylopectin albumin |
| Answer» B. Glyceraldehydes glucose peptone | |