MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 2539 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1401. |
How many structural isomers are possible for Pentane? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» E. | |
| 1402. |
One of the characteristics of polymer is |
| A. | High temperature stability |
| B. | High mechanical strength |
| C. | High elongation |
| D. | Low hardness |
| Answer» D. Low hardness | |
| 1403. |
Most electropositive element is- |
| A. | K |
| B. | Mg |
| C. | F |
| D. | Na |
| Answer» B. Mg | |
| 1404. |
New Rupee 5 coins are now made of |
| A. | Ferritic stainless steel |
| B. | Silver and steel |
| C. | Cupro nickel alloy |
| D. | Copper and brass |
| Answer» B. Silver and steel | |
| 1405. |
A process will be spontaneous at all temperatures if: |
| A. | ∆H < 0 and ∆S < 0 |
| B. | ∆H > 0 and ∆S < 0 |
| C. | ∆H < 0 and ∆S > 0 |
| D. | ∆H > 0 and ∆S > 0 |
| Answer» D. ∆H > 0 and ∆S > 0 | |
| 1406. |
Alloy steel containing chromium to resist rusting is known as? |
| A. | Wrought iron |
| B. | Stainless steel |
| C. | Hard steel |
| D. | Cast iron |
| Answer» C. Hard steel | |
| 1407. |
77 °F is equal to ________. |
| A. | 25 °C |
| B. | 15 °C |
| C. | 20 °C |
| D. | 10 °C |
| Answer» B. 15 °C | |
| 1408. |
In pure water, the concentration(s) of ________. |
| A. | H+ ions is equal to that of oxide ions |
| B. | H+ and OH- ions are unequal |
| C. | OH- ions is more than that of oxides |
| D. | H+ and OH- ions are equal |
| Answer» E. | |
| 1409. |
Density of water ________ when it freezes below 4°C. |
| A. | decreases |
| B. | increases |
| C. | remain constant |
| D. | No option is correct. |
| Answer» B. increases | |
| 1410. |
Limestone is a sedimentary rock composed primarily of _________ |
| A. | Nitrogen Oxide |
| B. | Sodium bicarbonate |
| C. | Sodium Chloride |
| D. | Calcium Carbonate |
| Answer» E. | |
| 1411. |
Acids are mostly stored in containers made of ______. |
| A. | Soil |
| B. | Glass |
| C. | Metals |
| D. | None of these |
| Answer» C. Metals | |
| 1412. |
Brass is an alloy of copper and ______. |
| A. | zinc |
| B. | tin |
| C. | iron |
| D. | silver |
| Answer» B. tin | |
| 1413. |
Atomic weight of an element is compared with which of the following to get the atomic weight of that element? |
| A. | Oxygen |
| B. | Carbon |
| C. | Hydrogen |
| D. | Nitrogen |
| Answer» C. Hydrogen | |
| 1414. |
According to the principle of energy conservation, when a piston in an automobile engine compresses the gas in a cylinder, which of the following must occur? |
| A. | Kinetic energy of gas must increase |
| B. | The gas must undergo a change of state |
| C. | The gas must undergo a chemical change |
| D. | None of the above |
| Answer» B. The gas must undergo a change of state | |
| 1415. |
______ is a saturated hydrocarbon |
| A. | Acetylene |
| B. | Propene |
| C. | Ethene |
| D. | Ethane |
| Answer» E. | |
| 1416. |
Chloro - Fluoro carbons are consisted of- |
| A. | only carbons |
| B. | only carbons and chlorine |
| C. | only carbon, chlorine and flourine |
| D. | only chlorine and fluorine |
| Answer» D. only chlorine and fluorine | |
| 1417. |
A compound of formula A2 B3 has the hcp lattice. Which atom forms the hcp lattice and what fraction of tetrahedral voids is occupied by the other atoms? |
| A. | hcp lattice- \(A,\frac{2}{3}\) tetrahedral voids- B |
| B. | hcp lattice- \(A,\frac{1}{3}\) tetrahedral voids- B |
| C. | hcp lattice- \(B,\frac{1}{3}\) tetrahedral voids- A |
| D. | hcp lattice- \(B,\frac{2}{3}\) tetrahedral voids- A |
| Answer» D. hcp lattice- \(B,\frac{2}{3}\) tetrahedral voids- A | |
| 1418. |
Isotopes of an element have the same ‘Z’ value but differ in: |
| A. | Number of neutrons in the nucleus |
| B. | Number of electrons in the atom |
| C. | Number of protons in the nucleus |
| D. | Number of protons and electrons in the atom |
| Answer» B. Number of electrons in the atom | |
| 1419. |
Arrange the following substances in chronological order of their first synthesis in lab:1. Black gold2. Fullerene3. Graphene4. KevlarSelect correct answer from the codes given below: |
| A. | 1 2 3 4 |
| B. | 4 2 3 1 |
| C. | 2 4 3 1 |
| D. | 4 1 2 3 |
| Answer» C. 2 4 3 1 | |
| 1420. |
Among the colloids cheese (C), milk (M) and smoke (S), the correct combination of the dispersed phase and dispersion medium, respectively is |
| A. | C: liquid in solid; M: liquid in liquid; S: solid in gas |
| B. | C: solid in liquid; M: liquid in liquid; S: gas in solid |
| C. | C: liquid in solid; M: liquid in solid; S: solid in gas |
| D. | C: solid in liquid; M: solid in liquid; S: solid in gas |
| Answer» B. C: solid in liquid; M: liquid in liquid; S: gas in solid | |
| 1421. |
Gold is alloyed with which metal to make it harder? |
| A. | Cu |
| B. | Sn |
| C. | Na |
| D. | C |
| Answer» B. Sn | |
| 1422. |
In the Western countries, radiators of cars are filled with alcohols instead of water because, |
| A. | Water has lower freezing point than alcohol |
| B. | Alcohol has lower freezing point than water |
| C. | Water is more combustible than alcohol |
| D. | Alcohol is more combustible than water |
| Answer» C. Water is more combustible than alcohol | |
| 1423. |
Gun-powder is a ___________? |
| A. | Molecule |
| B. | Mixture |
| C. | Element |
| D. | Compound |
| Answer» C. Element | |
| 1424. |
16 g oxygen contains ______ atoms of oxygen. |
| A. | 6.022 × 10-23 |
| B. | 6.022 × 1023 |
| C. | 6.022 × 1022 |
| D. | 6.022 × 10-22 |
| Answer» C. 6.022 × 1022 | |
| 1425. |
In an electrochemical cell, Ag+ ions in AgNO3 are reduced to Ag metal at the cathode and Cu is oxidized to Cu2+ at the anode. A current of 0.7 A is passed through the cell for 10 min. The mass (in grams) of silver deposited and copper dissolved, respectively, are: [Faraday Constant = 96,485 C mol−1, Atomic Weight of Ag = 107.9, Atomic Weight of Cu = 63.55] |
| A. | 0.469 and 0.138 |
| B. | 0.235 and 0.138 |
| C. | 0.469 and 0.069 |
| D. | 0.235 and 0.069 |
| Answer» B. 0.235 and 0.138 | |
| 1426. |
Bohr’s model is related to which of the following? |
| A. | Plum pudding model |
| B. | Nuclear theory |
| C. | The concept of quantization of energy |
| D. | Dual nature of the electron |
| Answer» D. Dual nature of the electron | |
| 1427. |
Ethanoic acid liberates hydrogen gas when it react with which of the following? |
| A. | NaOH |
| B. | NaHCO3 |
| C. | Na2CO3 |
| D. | Na |
| Answer» E. | |
| 1428. |
Match List - I with List - II and select the correct answer from the codes given below the lists:List - IList - IIA. Kevlar1. ExplosiveB. Taxol2. Synthetic fibreC. Zinc Phosphide3. Anticancer drugD. Nitrocellulose4. Rodenticide |
| A. | A - 2, B - 4, C - 3, D - 1 |
| B. | A - 2, B - 3, C - 4, D - 1 |
| C. | A - 4, B - 3, C - 1, D - 2 |
| D. | A - 3, B - 1, C - 2, D - 4 |
| Answer» C. A - 4, B - 3, C - 1, D - 2 | |
| 1429. |
Baking soda is: |
| A. | NaHCO3 |
| B. | Na2CO3 |
| C. | Na2HCO3 |
| D. | None of these |
| Answer» B. Na2CO3 | |
| 1430. |
Atomic numbers of four elements are as follows: F (9), P (15), Cl (17), Ar (18).Which of the following two elements would be chemically similar? |
| A. | F and CI |
| B. | F and P |
| C. | Cl and P |
| D. | F and Ar |
| Answer» B. F and P | |
| 1431. |
Bauxite is the ore of: |
| A. | Iron |
| B. | Aluminum |
| C. | Copper |
| D. | Gold |
| Answer» C. Copper | |
| 1432. |
Identify the Soap less soap among the following. |
| A. | Medicated soap |
| B. | Toilet soap |
| C. | Glycerine soap |
| D. | Laundry soap |
| Answer» E. | |
| 1433. |
Na, Mg, Al, Si, P, S, Cl and Ar belong to the ________ period of the modern periodic table. |
| A. | Third |
| B. | First |
| C. | Second |
| D. | Fourth |
| Answer» B. First | |
| 1434. |
Common metals arranged in order of their decreasing reactivity is known as: |
| A. | Activity series |
| B. | Electrolytic reduction |
| C. | Conductivity |
| D. | Reactivity |
| Answer» B. Electrolytic reduction | |
| 1435. |
From which of the following elements, the smallest and lightest positive ion was obtained and called it as proton? |
| A. | Helium |
| B. | Hydrogen |
| C. | Oxygen |
| D. | Neon |
| Answer» C. Oxygen | |
| 1436. |
‘German silver’ is used to make decorative articles, coinage metal, ornaments, etc. The name is given because: |
| A. | It is an alloy of copper and contains silver as one of its components. |
| B. | Germans were the first to use silver. |
| C. | Its appearance is like silver. |
| D. | It is an alloy of silver. |
| Answer» D. It is an alloy of silver. | |
| 1437. |
A solution is prepared by dissolving 0.6 g of urea (molar mass = 60 g mol-1) and 1.8 g of glucose (molar mass = 180 g mol-1) in 100 mL of water at 27°C. The osmotic pressure of the solution is:(R = 0.08206 L atm K-1 mol-1) |
| A. | 8.2 atm |
| B. | 2.46 atm |
| C. | 4.92 atm |
| D. | 1.64 atm |
| Answer» D. 1.64 atm | |
| 1438. |
_____ is the molecular mass of H2SO4 |
| A. | 98 u |
| B. | 99 u |
| C. | 90 u |
| D. | 96 u |
| Answer» B. 99 u | |
| 1439. |
Match List I with List II and select the correct answer using the code given below the Lists: List I(Compound) List II(Nature) A.Sodium hydroxide 1.Strong acid B.Calcium oxide2.Alkali C.Acetic acid3.Weak acid D.Hydrochloric acid4.Base |
| A. | A - 2, B - 3, C - 4, D - 1 |
| B. | A - 2, B - 4, C - 3, D - 1 |
| C. | A - 1, B - 4, C - 3, D - 2 |
| D. | A - 1, B - 3, C - 4, D - 2 |
| Answer» C. A - 1, B - 4, C - 3, D - 2 | |
| 1440. |
A cylindrical wire of length L and radius r has a resistance of R. The resistance of another wire of the same material but thrice its length and one-third its radius will be __________. |
| A. | 27R |
| B. | 9R |
| C. | R |
| D. | 3R |
| Answer» B. 9R | |
| 1441. |
\({92^{{U^{235}}}}\) undergoes successive disintegrations with the end product of \({82^{{U^{203}}}}\). The number of α and β particles emitted are |
| A. | α = 6, β = 4 |
| B. | α = 6, β = 0 |
| C. | α = 8, β = 6 |
| D. | α = 3, β = 3 |
| Answer» D. α = 3, β = 3 | |
| 1442. |
Name the only metal that is antibacterial. |
| A. | Sodium |
| B. | Copper |
| C. | Iron |
| D. | Aluminium |
| Answer» C. Iron | |
| 1443. |
'Brine' is |
| A. | common name of bleaching powder |
| B. | aqueous solution of chlorine |
| C. | saturated solution of NaCl |
| D. | aqueous solution of Na2SO4 |
| Answer» D. aqueous solution of Na2SO4 | |
| 1444. |
Acid rain is caused by SO2 and NO2 gases present in polluted air. The pH of acid rain will be about |
| A. | 1.6 |
| B. | 5.2 |
| C. | 7 |
| D. | 10 |
| Answer» C. 7 | |
| 1445. |
Excess fluoride in drinking water causes |
| A. | Lung disease |
| B. | Intestinal infection |
| C. | Fluorosis |
| D. | Rickets |
| Answer» D. Rickets | |
| 1446. |
Formations of new substance occurs during |
| A. | Combustion of coal |
| B. | Evaporation of acetone |
| C. | Sublimation of camphor |
| D. | Melting of butter |
| Answer» B. Evaporation of acetone | |
| 1447. |
Helium gas is used in gas balloons instead of hydrogen gas because it is |
| A. | Lighter than hydrogen |
| B. | More abundant than hydrogen |
| C. | Non-combustible |
| D. | More stable |
| Answer» D. More stable | |
| 1448. |
________ turns the red litmus paper into blue. |
| A. | Acid |
| B. | Base |
| C. | Salts |
| D. | No option is correct |
| Answer» C. Salts | |
| 1449. |
Aluminium is manufactured from |
| A. | copper ore |
| B. | Bauxite ore |
| C. | Mica ore |
| D. | Manganese ore |
| Answer» C. Mica ore | |
| 1450. |
_______ is an alkali metal. |
| A. | Sodium |
| B. | Manganese |
| C. | Aluminium |
| D. | Magnesium |
| Answer» B. Manganese | |