MCQOPTIONS
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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.
| 1601. |
______ is an ingredient in antacids. |
| A. | Na2CO3 |
| B. | Na2CO3.10H2O |
| C. | NaHCO3 |
| D. | NH4Cl |
| Answer» D. NH4Cl | |
| 1602. |
Osmosis is the process of movement of water molecules from its |
| A. | higher concentration to its lower concentration through a cell wall. |
| B. | lower concentration to its higher concentration through a semi-permeable membrane. |
| C. | higher concentration to its lower concentration through a fully permeable membrane. |
| D. | higher concentration to its lower concentration through a semi-permeable membrane. |
| Answer» E. | |
| 1603. |
Consider the following table:Gasa/(kpa dm6 mol-1)b/(dm3 mol-1)A642.320.05196B155.210.04136C431.910.05196D155.210.4382a and b are van der Waals constants. The correct statement about the gases is: |
| A. | Gas C will occupy more volume than gas A; gas B will be more compressible than gas D |
| B. | Gas C will occupy lesser volume than gas A; gas B will be lesser compressible than gas D |
| C. | Gas C will occupy more volume than gas A; gas B will be lesser compressible than gas D |
| D. | Gas C will occupy lesser volume than gas A; gas B will be more compressible than gas D |
| Answer» B. Gas C will occupy lesser volume than gas A; gas B will be lesser compressible than gas D | |
| 1604. |
How many carbon and hydrogen atoms are there in Propane, respectively? |
| A. | 2, 4 |
| B. | 4, 7 |
| C. | 2, 6 |
| D. | 3, 8 |
| Answer» E. | |
| 1605. |
Alkaline earth metals are- |
| A. | Li, Na, K |
| B. | Fe, Co, Ni |
| C. | Ba, Sr, Ca |
| D. | Cu, Ag, Au |
| Answer» D. Cu, Ag, Au | |
| 1606. |
All acids produce ___________ gas on reacting with metals. |
| A. | Oxygen |
| B. | Hydrogen |
| C. | Carbon dioxide |
| D. | Nitrogen |
| Answer» C. Carbon dioxide | |
| 1607. |
Doberiener's system of classification into Triad was NOT found to be useful as he could identify only: |
| A. | Four triads |
| B. | Five triads |
| C. | Three triads |
| D. | Two triads |
| Answer» D. Two triads | |
| 1608. |
Conversion of RBr to RMgBr requires |
| A. | Mg / dry ether / N2 - atmosphere. |
| B. | Mg / moist ether / N2 - atmosphere. |
| C. | Mg / ethanol / N2 - atmosphere. |
| D. | Mg / dry ether / O2 - atmosphere |
| Answer» B. Mg / moist ether / N2 - atmosphere. | |
| 1609. |
IUPAC name of allyl chloride is - Identify. |
| A. | 3-chloro-prop-2-ene |
| B. | 1-chloro-prop-2-ene |
| C. | 1-chloro-prop-3-ene |
| D. | 3-chloro-prop-1-ene |
| Answer» E. | |
| 1610. |
Leclanche cell and Daniel cell are examples of |
| A. | both dry cell |
| B. | both wet cell |
| C. | dry cell, wet cell |
| D. | wet cell, dry cell |
| Answer» D. wet cell, dry cell | |
| 1611. |
Cobalt Oxide imparts which color to glass? |
| A. | Green |
| B. | Purple |
| C. | Blue |
| D. | White |
| Answer» D. White | |
| 1612. |
Aqueous solution of copper sulphate ________. |
| A. | Does not affect litmus |
| B. | Turns blue litmus red |
| C. | Affects both red and blue litmus |
| D. | Turns red litmus blue |
| Answer» C. Affects both red and blue litmus | |
| 1613. |
At what temperature does iron melt? |
| A. | 1638°C |
| B. | 1538°C |
| C. | 1583°C |
| D. | 1683°C |
| Answer» C. 1583°C | |
| 1614. |
In 540 grams of glucose, the number of moles present is: |
| A. | 4 |
| B. | 2 |
| C. | 1 |
| D. | 3 |
| Answer» E. | |
| 1615. |
Identify the pair of elastomers among the following. |
| A. | Neoprene, Nylon-6 |
| B. | Nylon 6, 6 & Nylon-2 Nylon -6 |
| C. | Poly acrylonitrile, Teflon |
| D. | Buna-N, Buna-S |
| Answer» E. | |
| 1616. |
A compound has fixed- |
| A. | Melting point |
| B. | Boiling point |
| C. | Melting and boiling point both |
| D. | None of these |
| Answer» D. None of these | |
| 1617. |
For a reaction, consider the plot of ln k versus 1/T given in the figure. If the rate constant of this reaction at 400 K is 10-5 s-1, then the rate constant at 500 K is |
| A. | 4 × 10-4 s-1 |
| B. | 10-6 s-1 |
| C. | 10-4 s-1 |
| D. | 2 × 10-4 s-1 |
| Answer» D. 2 × 10-4 s-1 | |
| 1618. |
Metals react with sodium hydroxide to produce _________. |
| A. | oxygen gas |
| B. | sodium |
| C. | water |
| D. | hydrogen gas |
| Answer» E. | |
| 1619. |
A gas which is not present in normal sample of air is _____________. |
| A. | Neon |
| B. | Chlorine |
| C. | Carbon dioxide |
| D. | Helium |
| Answer» C. Carbon dioxide | |
| 1620. |
Noble gases exist as individual ______. |
| A. | Atoms |
| B. | Molecules |
| C. | Elements |
| D. | Compounds |
| Answer» B. Molecules | |
| 1621. |
Detergents used for cleaning clothes are: |
| A. | Carbonates |
| B. | Bicarbonates |
| C. | Bismuthates |
| D. | Sulfonates |
| E. | None of the above / More than one above |
| Answer» E. None of the above / More than one above | |
| 1622. |
'Oil of vitriol' is the common name of which of the following? |
| A. | Nitric Acid |
| B. | Carbonic Acid |
| C. | Acetic Acid |
| D. | Sulphuric Acid |
| Answer» E. | |
| 1623. |
Metals are generally ______.I. DuctileII. MalleableIII. Poor conductors of heat |
| A. | Only I and II |
| B. | Only I and III |
| C. | Only II and III |
| D. | All I, II and III |
| Answer» B. Only I and III | |
| 1624. |
A mixture of sand and sugar is an example of- |
| A. | Heterogeneous mixture |
| B. | Homogeneous mixture |
| C. | Suspension |
| D. | Colloidal solution |
| Answer» B. Homogeneous mixture | |
| 1625. |
Bases are ____________ in taste. |
| A. | Salty |
| B. | Sweet |
| C. | Bitter |
| D. | Sour |
| Answer» D. Sour | |
| 1626. |
A compound ‘X’ on treatment with Br2/NaOH, provided C3H9N, which gives positive carbylamines test. Compound ‘X’ is |
| A. | CH3COCH2NHCH3 |
| B. | CH3CH2CH2CONH2 |
| C. | CH3CON(CH3)2 |
| D. | CH3CH2COCH2NH2 |
| Answer» C. CH3CON(CH3)2 | |
| 1627. |
Hall-Heroult’s process is given by |
| A. | \(ZnO+C\xrightarrow[]{coke,1673K}Zn+CO\) |
| B. | Cr2O3 + 2Al ⟶ Al2O3 + 2Cr |
| C. | 2Al2O3 + 3C ⟶ 4Al + 3CO2 |
| D. | Cu2+ (aq) + H2 (g) ⟶ Cu (s) + 2H+ (aq) |
| Answer» D. Cu2+ (aq) + H2 (g) ⟶ Cu (s) + 2H+ (aq) | |
| 1628. |
Glucose & Fructose are - Identify. |
| A. | Optical isomers |
| B. | Anomers |
| C. | Chain isomers |
| D. | Functional isomers |
| Answer» E. | |
| 1629. |
Among the following, the false statement is |
| A. | Tyndall effect can be used to distinguish between a colloidal solution and a true solution. |
| B. | It is possible to cause artificial rain by throwing electrified sand carrying charge opposite to the one on clouds from an aero plane. |
| C. | Lyophilic sol can be coagulated by adding an electrolyte. |
| D. | Latex is a colloidal solution of rubber particles which are positively charged. |
| Answer» E. | |
| 1630. |
Corrosion causes damage, especially that of: |
| A. | Ag |
| B. | Fe |
| C. | Al |
| D. | Cu |
| Answer» C. Al | |
| 1631. |
An example of a disproportionation reaction is: |
| A. | \({\rm{\;}}2{\rm{MnO}}_4^ - + 10{{\rm{I}}^ - } + 16{{\rm{H}}^ + } \to {\rm{\;}}2{\rm{M}}{{\rm{n}}^{2 + }} + 5{{\rm{I}}_2} + 8{{\rm{H}}_2}\) |
| B. | 2NaBr + Cl2 → 2NaCl + Br2 |
| C. | 2KMnO4 → K2 MnO4 + MnO2 + O2 |
| D. | 2CuBr → CuBr2 + Cu |
| Answer» E. | |
| 1632. |
On the cover (exposure), the property of a substance absorbing moisture from the air is said to be - |
| A. | Deliquescence |
| B. | Desiccation |
| C. | Osmosis |
| D. | Blooming |
| Answer» B. Desiccation | |
| 1633. |
_____ is a common name of ethanoic acid. |
| A. | Fuming acid |
| B. | Alcohol |
| C. | Sodium Hydroxide |
| D. | Acetic acid |
| Answer» E. | |
| 1634. |
How many types of isotopes does Scandium have? |
| A. | 10 |
| B. | 7 |
| C. | 9 |
| D. | 13 |
| Answer» E. | |
| 1635. |
Chlorine on reaction with hot and concentrated sodium hydroxide gives |
| A. | Cl- and ClO- |
| B. | \(C{l^ - }{\rm{and\;}}ClO_3^ -\) |
| C. | \(ClO_3^ - {\rm{\;and\;}}ClO_2^ -\) |
| D. | \(C{l^ - }{\rm{\;and}}\;ClO_2^ -\) |
| Answer» C. \(ClO_3^ - {\rm{\;and\;}}ClO_2^ -\) | |
| 1636. |
Among the following gases, which is the lightest gas in the periodic table? |
| A. | Oxygen |
| B. | Methane |
| C. | Nitrogen |
| D. | Hydrogen |
| Answer» E. | |
| 1637. |
Match the following :List - IList - IIa. Daltoni. Laws of motionb. Newtonii. Atomic theoryc. Faradayiii. Theory of relativity d. Einsteiniv. Laws of electromagnetic induction |
| A. | a - ii, b - i, c - iv, d - iii |
| B. | a - iii, b - iv, c - i, d - ii |
| C. | a - iv, b - iii, c - ii, d - ii |
| D. | a - i, b - ii, c - iii, d - iv |
| Answer» B. a - iii, b - iv, c - i, d - ii | |
| 1638. |
A solution contains 32 g of common salt in 320 g of water. Calculate the concentration in terms of mass by mass percentage of the solution. |
| A. | 9.09% |
| B. | 13.05% |
| C. | 9.09 g |
| D. | 8.84% |
| Answer» B. 13.05% | |
| 1639. |
If the rate of reaction does not depends upon the initial concentration of reactant, the order of reaction is: |
| A. | first |
| B. | second |
| C. | zero |
| D. | third |
| Answer» D. third | |
| 1640. |
IUPAC name ofHC ≡ C - CH2 - CH = CH2 is - |
| A. | Pent - 1 - en - 4 - yne |
| B. | Pent - 1 - yne - 4 - ene |
| C. | Pent - 2 - yne - 4 - ene |
| D. | None of these |
| Answer» C. Pent - 2 - yne - 4 - ene | |
| 1641. |
In the Modern Periodic Table, a zig-zag line separates ________. |
| A. | metals from non-metals |
| B. | metals from metalloids |
| C. | non-metals from metalloids |
| D. | metals from halogens |
| Answer» B. metals from metalloids | |
| 1642. |
Consider the following compounds:I. BF3II. IF7III. CO2IV. PCl5Among these compounds, the electrophiles are |
| A. | III and IV |
| B. | I, III and IV |
| C. | I, II, III and IV |
| D. | I and II |
| Answer» D. I and II | |
| 1643. |
_______is used as a fuel in cars with petrol. |
| A. | Ethanol |
| B. | Alcohol |
| C. | Benzene |
| D. | Butane |
| Answer» B. Alcohol | |
| 1644. |
Non-Metals are generally more electronegative due to their ________. |
| A. | A large number of electrons. |
| B. | Smaller atomic radii. |
| C. | Smaller atomic number. |
| D. | Smaller ionization energy. |
| Answer» C. Smaller atomic number. | |
| 1645. |
Directions: The following items consist of two statements, Statement I and Statement II. You are to examine these two statements carefully and select the answers to these items using the code given below:Statement I: Oxygen gas is easily produced at a faster rate by heating a mixture of Potassium Chlorate and Manganese dioxide than heating Potassium chlorate alone.Statement II: Manganese dioxide acts as a negative catalyst. |
| A. | Both the statements are individually true and Statement II is the correct explanation of statement I |
| B. | Both the statements are individually true but Statement II is not the correct explanation of Statement I |
| C. | Statement I is true but Statement II is false |
| D. | Statement I is false but Statement II is true |
| Answer» D. Statement I is false but Statement II is true | |
| 1646. |
Magnesium ribbon burns with a dazzling ______ flame. |
| A. | blue |
| B. | white |
| C. | green |
| D. | red |
| Answer» C. green | |
| 1647. |
Natural fibers are made from a simple molecule that is known as ________. |
| A. | Plastics |
| B. | Cellulose |
| C. | Polymer |
| D. | Monomer |
| Answer» E. | |
| 1648. |
Bronze is a/an ________. |
| A. | Alloy |
| B. | Non-metal |
| C. | Metal |
| D. | Metalloid |
| Answer» B. Non-metal | |
| 1649. |
A and B are in ideal condition. The ratio of molecular weights of A and B is 1 : 4. The pressure of the gas mixture of A and B with equal weight is P atm. What is the partial pressure (in atm) of mixture B? |
| A. | \(\frac{P}{2}\) |
| B. | \(\frac{P}{5}\) |
| C. | \(\frac{P}{2.5}\) |
| D. | \(\frac{P}{4}\) |
| Answer» C. \(\frac{P}{2.5}\) | |
| 1650. |
Chlorination of benzene under photochemical condition takes place by |
| A. | Nucleophilic substitution |
| B. | Electrophilic substitution |
| C. | Free radical mechanism |
| D. | Carbocation intermediate |
| Answer» C. Free radical mechanism | |