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MCQOPTIONS
This section includes 11242 Mcqs, each offering curated multiple-choice questions to sharpen your Joint Entrance Exam - Main (JEE Main) knowledge and support exam preparation. Choose a topic below to get started.
| 9101. |
Which carbohydrate is used in silvering of mirrors [BHU 1973; CPMT 1991] |
| A. | Sucrose |
| B. | Starch |
| C. | Glucose |
| D. | Fructose |
| Answer» D. Fructose | |
| 9102. |
?Rayon? is |
| A. | Natural silk |
| B. | Artificial silk |
| C. | Natural plastic or rubber |
| D. | Synthetic plastic |
| Answer» C. Natural plastic or rubber | |
| 9103. |
\[C-14\] is used in carbon dating of dead objects because [DPMT 1996] |
| A. | Its half-life is \[{{10}^{3}}\] years |
| B. | Its half-life is \[{{10}^{4}}\] years |
| C. | It is found in nature abundantly and in definite ratio |
| D. | It is found in dead animals abundantly |
| Answer» D. It is found in dead animals abundantly | |
| 9104. |
Which of the following is wrongly matched [KCET (Med.) 1999] |
| A. | German silver \[Cu+Zn+Ni\] |
| B. | Alnico \[Fe+Al+Ni+CO\] |
| C. | Monel metal \[Cu+Zn+Sn\] |
| D. | Duralumin \[Al+Cu+Mg+Mn\] |
| Answer» D. Duralumin \[Al+Cu+Mg+Mn\] | |
| 9105. |
A well stoppered thermos flask contains some ice cubes. This is an example of a [AIIMS 1992] |
| A. | Closed system |
| B. | Open system |
| C. | Isolated system |
| D. | Non-thermodynamic system |
| Answer» D. Non-thermodynamic system | |
| 9106. |
The percentage of \[{{P}_{2}}{{O}_{5}}\]in diammonium hydrogen phosphate \[{{(N{{H}_{4}})}_{2}}HP{{O}_{4}}\]is [CPMT 1992] |
| A. | 23.48 |
| B. | 46.96 |
| C. | 53.78 |
| D. | 71.00 |
| Answer» D. 71.00 | |
| 9107. |
Enzymes are [CPMT 1974, 81] |
| A. | Micro-organisms |
| B. | Proteins |
| C. | Inorganic compounds |
| D. | Moulds |
| Answer» C. Inorganic compounds | |
| 9108. |
When the temperature is raised, the viscosity of liquid decreases, this is because [Kerala (Med.) 2002] |
| A. | Decreased volume of the solution |
| B. | Increase in temperature increases the average kinetic energy of molecules, which overcome the attractive force between them |
| C. | Decreased covalent and hydrogen bond forces |
| D. | Increased attraction between molecules |
| Answer» C. Decreased covalent and hydrogen bond forces | |
| 9109. |
The final product of complete oxidation of hydrocarbons is [CPMT 1981] |
| A. | Acid |
| B. | Aldehyde |
| C. | \[{{H}_{2}}O+C{{O}_{2}}\] |
| D. | Dihydric alcohol |
| Answer» D. Dihydric alcohol | |
| 9110. |
1.520 g of the hydroxide of a metal on ignition gave 0.995 gm of oxide. The equivalent weight of metal is [DPMT 1984] |
| A. | 1.520 |
| B. | 0.995 |
| C. | 19.00 |
| D. | 9.00 |
| Answer» E. | |
| 9111. |
\[{{V}_{2}}{{O}_{5}}\] is useful as catalyst in |
| A. | Manufacture of \[{{H}_{2}}S{{O}_{4}}\] |
| B. | Manufacture of \[HN{{O}_{3}}\] |
| C. | Manufacture of \[N{{a}_{2}}C{{O}_{3}}\] |
| D. | It is not a catalyst |
| Answer» B. Manufacture of \[HN{{O}_{3}}\] | |
| 9112. |
Which of the following will show increase in weight when kept in magnetic field |
| A. | \[Ti{{O}_{2}}\] |
| B. | \[F{{e}_{2}}{{(S{{O}_{4}})}_{3}}\] |
| C. | \[KMn{{O}_{4}}\] |
| D. | \[ScC{{l}_{3}}\] |
| Answer» C. \[KMn{{O}_{4}}\] | |
| 9113. |
Which of the following statements is wrong |
| A. | Catalysts can aid a rapid reaching of the equilibrium position, but do not change the position of the equilibrium |
| B. | Homogeneous catalysis generally involves an equilibrium reaction between at least one of the reactants and the catalyst |
| C. | Heterogeneous catalysis involves chemisorption on the surface of the catalyst |
| D. | Positive catalysts raise the energy of activation of the reaction they catalyse |
| Answer» E. | |
| 9114. |
Which of the following gases is used for welding [CPMT 1996] |
| A. | Methane |
| B. | Ethane |
| C. | Acetylene |
| D. | Ethene |
| Answer» D. Ethene | |
| 9115. |
Which of the following solutions has highest osmotic pressure [CPMT 1977] |
| A. | \[1\,M\,NaCl\] |
| B. | 1 M urea |
| C. | 1 M sucrose |
| D. | 1 M glucose |
| Answer» B. 1 M urea | |
| 9116. |
The chemical formula for certain pyrophosphate is \[C{{a}_{2}}{{P}_{2}}{{O}_{7}}\] , the formula of its ferric pyrophosphate will be |
| A. | \[F{{e}_{2}}{{({{P}_{2}}{{O}_{7}})}_{3}}\] |
| B. | \[F{{e}_{4}}({{P}_{4}}{{O}_{14}})\] |
| C. | \[F{{e}_{4}}{{({{P}_{2}}{{O}_{7}})}_{3}}\] |
| D. | \[F{{e}_{3}}P{{O}_{4}}\] |
| Answer» D. \[F{{e}_{3}}P{{O}_{4}}\] | |
| 9117. |
The purification of the colloidal particles from crystalloid dimensions through semipermeable membrane is known as [BHU 1979; MP PMT 1999; CBSE 1996; Pb. CET 2002] |
| A. | Coagulation |
| B. | Dialysis |
| C. | Ultrafiltration |
| D. | Peptisation |
| Answer» C. Ultrafiltration | |
| 9118. |
White of an egg is partly coagulated by heating which can be again obtained back by some pepsin and little \[HCl\]. This process is called |
| A. | Peptization |
| B. | Coagulation |
| C. | Precipitation |
| D. | None of these |
| Answer» B. Coagulation | |
| 9119. |
Which of the substances \[Na,\,\,Hg,\,\,S,\,\,Pt\] and graphite can be used as electrodes in electrolytic cells having aqueous solutions [AIIMS 1982] |
| A. | \[Na,\,\,Pt\]and graphite |
| B. | \[Na\]and \[Hg\] |
| C. | \[Pt\]and graphite only |
| D. | \[Na\]and \[Al\]only |
| Answer» D. \[Na\]and \[Al\]only | |
| 9120. |
An endothermic reaction with high activation energy for the forward reaction is given by the diagram: [AIIMS 2005] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» D. | |
| 9121. |
Hydrogen bomb is based on the principle of [AIEEE 2005] |
| A. | Nuclear fission |
| B. | Natural radioactivity |
| C. | Nuclear fusion |
| D. | Artificial radioactivity |
| Answer» D. Artificial radioactivity | |
| 9122. |
Glucose and fructose form [MP PMT 1986] |
| A. | Same osazone |
| B. | Same acid on oxidation |
| C. | Same alcohol when reduced |
| D. | Different osazone |
| Answer» B. Same acid on oxidation | |
| 9123. |
Which of the following is the least random state of water |
| A. | Ice |
| B. | Liquid water |
| C. | Steam |
| D. | All present same random state |
| Answer» B. Liquid water | |
| 9124. |
Which of the following statements is false for isopentane [MP PET 1996] |
| A. | It has three \[C{{H}_{3}}\] groups |
| B. | It has one \[C{{H}_{2}}\] group |
| C. | It has one CH group |
| D. | It has a carbon which is not bonded to hydrogen |
| Answer» E. | |
| 9125. |
Orford process is used in extraction of |
| A. | \[Fe\] |
| B. | \[Co\] |
| C. | \[Pt\] |
| D. | \[Ni\] |
| Answer» E. | |
| 9126. |
The IUPAC name of \[C{{H}_{3}}-\underset{OH\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\,C{{H}_{2}}-\overset{C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,\,}{\mathop{\underset{OH}{\mathop{\underset{|\,\,\,\,\,}{\mathop{C-}}\,}}\,}}\,}}\,C{{H}_{3}}\] and \[\underset{CN\,\,\,\,\,\,\,CN\,\,\,\,\,\,CN\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{H}_{2}}-CH-C{{H}_{2}}}}\,}}\,\] [Pb. CET 2004; DCE 2002; MNR 1984; CPMT 1983, 93; RPMT 1999] |
| A. | 1, 1-dimethyl-1, 3-butanediol and propanetricarbyl amine |
| B. | 4-methyl-2, 4-pentanediol and 1, 2, 3 propanetrinitrile |
| C. | 2-methyl 2, 4-pentanediol and 3 cyano 1, 5-pentanedinitrile |
| D. | 1, 3, 3-trimethyl 1,3-propanediol and 1, 2, 3 tricyano propane |
| Answer» D. 1, 3, 3-trimethyl 1,3-propanediol and 1, 2, 3 tricyano propane | |
| 9127. |
Metals like Pt and Pd can adsorb large volume of hydrogen under specific conditions. Such adsorbed hydrogen by the metal is known as |
| A. | Occluded hydrogen |
| B. | Absorbed hydrogen |
| C. | Reactive hydrogen |
| D. | Atomic hydrogen |
| Answer» B. Absorbed hydrogen | |
| 9128. |
Bauxite ore is concentrated by [MP PET 1994; KCET 1999; UPSEAT 2001] |
| A. | Froth flotation |
| B. | Electromagnetic separation |
| C. | Chemical separation |
| D. | Hydraulic separation |
| Answer» D. Hydraulic separation | |
| 9129. |
\[_{95}A{{m}^{241}}\] and \[_{90}T{{h}^{234}}\] belong respectively to [MP PMT 1999] |
| A. | \[4n\] and \[4n+1\] radioactive disintegration series |
| B. | \[4n+1\] and \[4n+2\] radioactive disintegration series |
| C. | \[4n+1\] and \[4n+3\] radioactive disintegration series |
| D. | \[4n+1\] and \[4n\] radioactive disintegration series |
| Answer» C. \[4n+1\] and \[4n+3\] radioactive disintegration series | |
| 9130. |
Which one of the following on heating will not give \[C{{O}_{2}}\] [NDA 1999; BHU 2000] |
| A. | \[CaC{{O}_{3}}\] |
| B. | \[N{{a}_{2}}C{{O}_{3}}\] |
| C. | \[PbC{{O}_{3}}\] |
| D. | \[L{{i}_{2}}C{{O}_{3}}\] |
| Answer» C. \[PbC{{O}_{3}}\] | |
| 9131. |
NaOH is prepared by the method [AFMC 2005] |
| A. | Down?s cell |
| B. | Castner cell |
| C. | Solvay process |
| D. | Castner Kellner cell |
| Answer» E. | |
| 9132. |
LPG is a mixture of [MP PMT 1999; KCET 2005] |
| A. | \[{{C}_{6}}{{H}_{12}}+{{C}_{6}}{{H}_{6}}\] |
| B. | \[{{C}_{4}}{{H}_{10}}+{{C}_{3}}{{H}_{8}}\] |
| C. | \[{{C}_{2}}{{H}_{4}}+{{C}_{2}}{{H}_{2}}\] |
| D. | \[{{C}_{2}}{{H}_{4}}+C{{H}_{4}}\] |
| Answer» C. \[{{C}_{2}}{{H}_{4}}+{{C}_{2}}{{H}_{2}}\] | |
| 9133. |
An example of a disaccharide made up of two units of the same monosaccharides is [KCET 1989; MP PET 1996; AFMC 2005] |
| A. | Sucrose |
| B. | Maltose |
| C. | Lactose |
| D. | None of these |
| Answer» C. Lactose | |
| 9134. |
Potash alum is a [CPMT 1986; MNR 1981] |
| A. | Complex salt |
| B. | Acid salt |
| C. | Double salt |
| D. | Normal salt |
| Answer» D. Normal salt | |
| 9135. |
Which is represented by the formula \[{{C}_{n}}{{H}_{2n-2}}\] [CPMT 1975, 76; EAMCET 1979; MP PET 2003 |
| A. | Alkane |
| B. | Alkyne |
| C. | Alkene |
| D. | None of these |
| Answer» C. Alkene | |
| 9136. |
Metalloid among the following is [DPMT 2001] |
| A. | \[Si\] |
| B. | \[C\] |
| C. | \[Pb\] |
| D. | \[Ge\] |
| Answer» E. | |
| 9137. |
Nylon-66 is a [RPET 1999; MP PMT 1993] |
| A. | Natural polymer |
| B. | Condensation polymer |
| C. | Addition polymer |
| D. | Substitution polymer |
| Answer» C. Addition polymer | |
| 9138. |
The IUPAC name of following compounds is \[\underset{COOH\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{HOOC-C{{H}_{2}}-CH-C{{H}_{2}}-C{{H}_{2}}-COOH}}\,}}\,\] [Kerala CET 2005] |
| A. | 2-(Carboxy methyl)-pentane-1, 5-dioic acid |
| B. | 3-Carboxy hexane -1, 6 dioic acid |
| C. | Butane, 1, 2, 4,-Tricarboxylic acid |
| D. | 4-Carboxy hexane-1, 6 dioic acid |
| E. | 1, 2 dicarboxypentanoic acid |
| Answer» C. Butane, 1, 2, 4,-Tricarboxylic acid | |
| 9139. |
Name the alkene with molecular formula \[{{C}_{10}}{{H}_{20}}\] [Kerala (Med.) 2003] |
| A. | Dodecene |
| B. | Undecene |
| C. | Decene |
| D. | Heptene |
| Answer» D. Heptene | |
| 9140. |
What is the co-ordination number of the metal in \[{{\left[ Co{{(en)}_{2}}C{{l}_{2}} \right]}^{+}}\] |
| A. | 4 |
| B. | 5 |
| C. | 6 |
| D. | 3 |
| Answer» D. 3 | |
| 9141. |
Which one of the following is a true peroxide [RPET 1999; CPMT 1981; Roorkee 1995] |
| A. | \[S{{O}_{2}}\] |
| B. | \[Ba{{O}_{2}}\] |
| C. | \[Mn{{O}_{2}}\] |
| D. | \[N{{O}_{2}}\] |
| Answer» C. \[Mn{{O}_{2}}\] | |
| 9142. |
Benzene on treatment with a mixture of conc. \[HN{{O}_{3}}\] and conc. \[{{H}_{2}}S{{O}_{4}}\] at \[{{100}^{o}}C\] gives |
| A. | Nitrobenzene |
| B. | m-dinitrobenzene |
| C. | p-dinitrobenzene |
| D. | o-dinitrobenzene |
| Answer» C. p-dinitrobenzene | |
| 9143. |
?Shellac? secreted by lac insects is |
| A. | Natural plastic |
| B. | Natural resin |
| C. | Natural elastic |
| D. | Any of these |
| Answer» C. Natural elastic | |
| 9144. |
In the extraction of zinc which gas is burnt in the jackets surrounding the retorts |
| A. | Water gas |
| B. | Producer gas |
| C. | Oil gas |
| D. | Coal gas |
| Answer» C. Oil gas | |
| 9145. |
The rate constant of a reaction at temperature 200K is 10 times less than the rate constant at 400 K. What is the activation energy \[({{E}_{a}})\]of the reaction (R = gas constant) [EAMCET 2003] |
| A. | 1842.4 R |
| B. | 921.2 R |
| C. | 460.6 R |
| D. | 230.3 R |
| Answer» C. 460.6 R | |
| 9146. |
The metal which gives hydrogen on treatment with acid as well as sodium hydroxide is [MP PET 1996] |
| A. | Iron |
| B. | Zinc |
| C. | Copper |
| D. | None of the above |
| Answer» C. Copper | |
| 9147. |
The specific conductance of a solution is 0.2 \[oh{{m}^{-1}}c{{m}^{-1}}\]and conductivity is 0.04 \[oh{{m}^{-1}}\]. The cell constant would be [RPET 1999] |
| A. | 1 \[c{{m}^{-1}}\] |
| B. | 0 \[c{{m}^{-1}}\] |
| C. | 5 \[c{{m}^{-1}}\] |
| D. | 0.2 \[c{{m}^{-1}}\] |
| Answer» D. 0.2 \[c{{m}^{-1}}\] | |
| 9148. |
Which of the following is the weakest base [IIT 1980] |
| A. | \[NaOH\] |
| B. | \[Ca\,{{(OH)}_{2}}\] |
| C. | \[N{{H}_{4}}OH\] |
| D. | \[KOH\] |
| Answer» D. \[KOH\] | |
| 9149. |
Sulphuric acid provides a example of [Kerala CET (Med.) 2002] |
| A. | Co-ordinate bonds |
| B. | Non-covalent compound |
| C. | Covalent and co-ordinate bond |
| D. | Non-covalent ion |
| Answer» D. Non-covalent ion | |
| 9150. |
The freezing points of equimolar solutions of glucose, \[KN{{O}_{3}}\] and \[AlC{{l}_{3}}\] are in the order of [AMU 2000] |
| A. | \[AlC{{l}_{3}}<KN{{O}_{3}}<\text{Glucose}\] |
| B. | \[\text{Glucose}<KN{{O}_{3}}<AlC{{l}_{3}}\] |
| C. | \[\text{Glucose}<AlC{{l}_{3}}<KN{{O}_{3}}\] |
| D. | \[AlC{{l}_{3}}<\text{Glucose}<KN{{O}_{3}}\] |
| Answer» B. \[\text{Glucose}<KN{{O}_{3}}<AlC{{l}_{3}}\] | |