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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.
| 5001. |
\[{{K}_{a}}\] of \[{{H}_{2}}{{O}_{2}}\] is of the order of [MP PMT 1994] |
| A. | \[{{10}^{-12}}\] |
| B. | \[{{10}^{-14}}\] |
| C. | \[{{10}^{-16}}\] |
| D. | \[{{10}^{-10}}\] |
| Answer» B. \[{{10}^{-14}}\] | |
| 5002. |
On shaking \[{{H}_{2}}{{O}_{2}}\] with acidified potassium dichromate and ether, ethereal layer becomes |
| A. | Green |
| B. | Red |
| C. | Blue |
| D. | Black |
| Answer» D. Black | |
| 5003. |
The structure of \[{{H}_{2}}{{O}_{2}}\] is |
| A. | Open book like |
| B. | Linear |
| C. | Closed book |
| D. | Pyramidal |
| Answer» B. Linear | |
| 5004. |
\[{{H}_{2}}{{O}_{2}}\to 2{{H}^{+}}+{{O}_{2}}+2{{e}^{-}}\]; \[E{}^\circ =-0.68\,V\]. This equation represents which of the following behaviour of \[{{H}_{2}}{{O}_{2}}\] |
| A. | Reducing |
| B. | Oxidising |
| C. | Acidic |
| D. | Catalytic |
| Answer» B. Oxidising | |
| 5005. |
Which of the following is wrong about \[{{H}_{2}}{{O}_{2}}\]? It is used |
| A. | As aerating agent in production of spong rubber |
| B. | As an antichlor |
| C. | For restoring white colour of blackened lead painting |
| D. | None of these |
| Answer» E. | |
| 5006. |
\[{{H}_{2}}{{O}_{2}}\] on reacting with ethene gives |
| A. | Ethane |
| B. | Ethanal |
| C. | Ethylene glycol |
| D. | Ethanol |
| Answer» D. Ethanol | |
| 5007. |
Decomposition of \[{{H}_{2}}{{O}_{2}}\] is prevented by |
| A. | NaOH |
| B. | \[Mn{{O}_{2}}\] |
| C. | Acetanilide |
| D. | Oxalic acid |
| Answer» D. Oxalic acid | |
| 5008. |
Nitrates of all metals are |
| A. | Soluble in water |
| B. | Insoluble |
| C. | Coloured |
| D. | Unstable |
| Answer» B. Insoluble | |
| 5009. |
\[{{H}_{2}}{{O}_{2}}\] is a |
| A. | Weak acid |
| B. | Weak base |
| C. | Neutral |
| D. | None of these |
| Answer» B. Weak base | |
| 5010. |
\[{{H}_{2}}{{O}_{2}}\] used in rockets has the concentration |
| A. | 0.5 |
| B. | 0.7 |
| C. | 0.3 |
| D. | 0.9 |
| Answer» E. | |
| 5011. |
\[{{H}_{2}}{{O}_{2}}\] is |
| A. | Poor polar solvent than water |
| B. | Better polar solvent than \[{{H}_{2}}O\] |
| C. | Both have equal polarity |
| D. | Better polar solvent but its strong auto oxidising ability limits its use as such |
| Answer» E. | |
| 5012. |
Which substance cannot be reduced by \[{{H}_{2}}{{O}_{2}}\] |
| A. | \[KMn{{O}_{4}}/{{H}_{2}}S{{O}_{4}}\] |
| B. | \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}/{{H}_{2}}S{{O}_{4}}\] |
| C. | \[A{{g}_{2}}O\] |
| D. | \[F{{e}^{3+}}\] |
| Answer» E. | |
| 5013. |
Which of the following cannot be oxidised by \[{{H}_{2}}{{O}_{2}}\] |
| A. | \[{{O}_{3}}\] |
| B. | \[KI/HCl\] |
| C. | PbS |
| D. | \[N{{a}_{2}}S{{O}_{3}}\] |
| Answer» B. \[KI/HCl\] | |
| 5014. |
Which substance does not speed up decomposition of \[{{H}_{2}}{{O}_{2}}\] |
| A. | Glycerol |
| B. | Pt |
| C. | Gold |
| D. | \[Mn{{O}_{2}}\] |
| Answer» B. Pt | |
| 5015. |
1 ml of \[{{H}_{2}}{{O}_{2}}\] solution gives 10 ml of \[{{O}_{2}}\] at NTP. It is |
| A. | 10 vol. \[{{H}_{2}}{{O}_{2}}\] |
| B. | 20 vol. \[{{H}_{2}}{{O}_{2}}\] |
| C. | 30 vol. \[{{H}_{2}}{{O}_{2}}\] |
| D. | 40 vol. \[{{H}_{2}}{{O}_{2}}\] |
| Answer» B. 20 vol. \[{{H}_{2}}{{O}_{2}}\] | |
| 5016. |
In lab \[{{H}_{2}}{{O}_{2}}\] is prepared by [CPMT 2002; MH CET 2003; Pb. PMT 2004; BCECE 2005] |
| A. | Cold \[{{H}_{2}}S{{O}_{4}}+Ba{{O}_{2}}\] |
| B. | \[HCl+Ba{{O}_{2}}\] |
| C. | Conc.\[{{H}_{2}}S{{O}_{4}}+N{{a}_{2}}{{O}_{2}}\] |
| D. | \[{{H}_{2}}+{{O}_{2}}\] |
| Answer» B. \[HCl+Ba{{O}_{2}}\] | |
| 5017. |
Which one of the following is a true peroxide |
| A. | \[N{{O}_{2}}\] |
| B. | \[Mn{{O}_{2}}\] |
| C. | \[Ba{{O}_{2}}\] |
| D. | \[S{{O}_{2}}\] |
| Answer» D. \[S{{O}_{2}}\] | |
| 5018. |
\[{{H}_{2}}{{O}_{2}}\] is manufactured these days [DCE 2004] |
| A. | By the action of \[{{H}_{2}}{{O}_{2}}\] on \[Ba{{O}_{2}}\] |
| B. | By the action of \[{{H}_{2}}S{{O}_{4}}\] on \[N{{a}_{2}}{{O}_{2}}\] |
| C. | By electrolysis of 50% \[{{H}_{2}}S{{O}_{4}}\] |
| D. | By burning hydrogen in excess of oxygen |
| Answer» D. By burning hydrogen in excess of oxygen | |
| 5019. |
20 volume \[{{H}_{2}}{{O}_{2}}\] solution has a strength of about |
| A. | 0.3 |
| B. | 0.06 |
| C. | 0.03 |
| D. | 0.1 |
| Answer» C. 0.03 | |
| 5020. |
Equivalent weight of \[{{H}_{2}}{{O}_{2}}\] is |
| A. | 17 |
| B. | 34 |
| C. | 68 |
| D. | 18 |
| Answer» B. 34 | |
| 5021. |
Hydrogen peroxide is used as |
| A. | Oxidising agent |
| B. | Reducing agent |
| C. | Both as oxidising and reducing agent |
| D. | Drying agent |
| Answer» D. Drying agent | |
| 5022. |
The strength in volumes of a solution containing 30.36 g/litre of \[{{H}_{2}}{{O}_{2}}\] is [UPSEAT 2004] |
| A. | 10 volume |
| B. | 20 volume |
| C. | 5 volume |
| D. | None of these |
| Answer» B. 20 volume | |
| 5023. |
The volume of oxygen liberated from 15 ml of 20 volume \[{{H}_{2}}{{O}_{2}}\] is [MH CET 2003] |
| A. | 250 ml |
| B. | 300 ml |
| C. | 150 ml |
| D. | 200 ml |
| Answer» C. 150 ml | |
| 5024. |
The volume strength of 1.5 N \[{{H}_{2}}{{O}_{2}}\] solution is [BHU 2004; Pb. CET 2004] |
| A. | 8.4 litres |
| B. | 4.2 litres |
| C. | 16.8 litres |
| D. | 5.2 litres |
| Answer» B. 4.2 litres | |
| 5025. |
The structure of \[{{H}_{2}}{{O}_{2}}\] is [CBSE 1999; AFMC 2004] |
| A. | Planar |
| B. | Linear |
| C. | Spherical |
| D. | Non-planar |
| Answer» E. | |
| 5026. |
Fenton's reagent is [MP PET 2000; RPET 2000] |
| A. | \[FeS{{O}_{4}}+{{H}_{2}}{{O}_{2}}\] |
| B. | \[Zn+HCl\] |
| C. | \[Sn+HCl\] |
| D. | None of these |
| Answer» B. \[Zn+HCl\] | |
| 5027. |
\[{{H}_{2}}{{O}_{2}}\] will oxidise [Roorkee 1995] |
| A. | \[KMn{{O}_{4}}\] |
| B. | PbS |
| C. | \[Mn{{O}_{2}}\] |
| D. | \[{{H}_{2}}S\] |
| Answer» C. \[Mn{{O}_{2}}\] | |
| 5028. |
What is the product of the reaction of \[{{H}_{2}}{{O}_{2}}\] with \[C{{l}_{2}}\] [RPET 2003] |
| A. | \[{{O}_{2}}+HOCl\] |
| B. | \[HCl+{{O}_{2}}\] |
| C. | \[{{H}_{2}}O+HCl\] |
| D. | \[HCl+{{H}_{2}}\] |
| Answer» C. \[{{H}_{2}}O+HCl\] | |
| 5029. |
There is a sample of 10 volume of hydrogen peroxide solution. Calculate its strength [UPSEAT 2001] |
| A. | 0.03 |
| B. | 0.04045 |
| C. | 0.02509 |
| D. | 0.03035 |
| Answer» E. | |
| 5030. |
In which of the following reaction hydrogen peroxide is a reducing agent [BHU 1995] |
| A. | \[2FeC{{l}_{2}}+2HCl+{{H}_{2}}{{O}_{2}}\to 2FeC{{l}_{3}}+2{{H}_{2}}O\] |
| B. | \[C{{l}_{2}}+{{H}_{2}}{{O}_{2}}\to 2HCl+{{O}_{2}}\] |
| C. | \[2HI+{{H}_{2}}{{O}_{2}}\to 2{{H}_{2}}O+{{I}_{2}}\] |
| D. | \[{{H}_{2}}S{{O}_{3}}+{{H}_{2}}{{O}_{2}}\to {{H}_{2}}S{{O}_{4}}+{{H}_{2}}O\] |
| Answer» C. \[2HI+{{H}_{2}}{{O}_{2}}\to 2{{H}_{2}}O+{{I}_{2}}\] | |
| 5031. |
Which concept best explains that o-nitrophenol is more volatile than p-nitrophenol [AIIMS 1980, 82; Kurukshetra CEE 1998; MP PET 2002] |
| A. | Resonance |
| B. | Hyperconjugation |
| C. | Hydrogen bonding |
| D. | Steric hindrence |
| Answer» D. Steric hindrence | |
| 5032. |
As a result of \[sp\] hybridization, we get [IIT 1984] |
| A. | Two mutual perpendicular orbitals |
| B. | Two orbitals at \[{{180}^{o}}\] |
| C. | Four orbitals in tetrahedral directions |
| D. | Three orbitals in the same plane |
| Answer» C. Four orbitals in tetrahedral directions | |
| 5033. |
The reason for exceptionally high boiling point of water is [DPMT 1986; NCERT 1976; AMU 1984; EAMCET 1979; MP PMT 1993; AIIMS 1996; KCET 2001; CPMT 2003] |
| A. | Its high specific heat |
| B. | Its high dielectric constant |
| C. | Low ionization of water molecules |
| D. | Hydrogen bonding in the molecules of water |
| Answer» E. | |
| 5034. |
In the following which species does not contain \[s{{p}^{3}}\] hybridization [DPMT 1985] |
| A. | \[SO_{4}^{2-}\] |
| B. | \[C{{H}_{4}}\] |
| C. | \[{{H}_{2}}O\] |
| D. | \[C{{O}_{2}}\] |
| Answer» E. | |
| 5035. |
H-bond is not present in [BCECE 2005] |
| A. | Water |
| B. | Glycerol |
| C. | Hydrogen fluoride |
| D. | Hydrogen Sulphide |
| Answer» E. | |
| 5036. |
Contrary to other hydrogen halides, hydrogen fluoride is a liquid because [MP PMT 1990; AMU 1983; EAMCET 1980] |
| A. | Size of \[F\]atom is small |
| B. | \[HF\]is a weak acid |
| C. | \[HF\]molecule are hydrogen bonded |
| D. | Fluorine is highly reactive |
| Answer» D. Fluorine is highly reactive | |
| 5037. |
Which is the weakest among the following types of bond [NCERT 1979; MADT Bihar 1984] |
| A. | Ionic bond |
| B. | Metallic bond |
| C. | Covalent bond |
| D. | Hydrogen bond |
| Answer» E. | |
| 5038. |
When two ice cubes are pressed over each other, they unit to form one cube. Which of the following force is responsible for holding them together [NCERT 1978] |
| A. | Vander Waal's forces |
| B. | Hydrogen bond formation |
| C. | Covalent attraction |
| D. | Dipole?dipole attraction |
| Answer» C. Covalent attraction | |
| 5039. |
Select the compound from the following which dissolves in water [IIT 1980] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» E. | |
| 5040. |
H ? bonding is maximum in [BHU 2003] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» C. | |
| 5041. |
is a liquid while is gas due to [BHU 2003] |
| A. | Covalent bonding |
| B. | Molecular attraction |
| C. | H ? bonding |
| D. | H ? bonding and molecular attraction |
| Answer» D. H ? bonding and molecular attraction | |
| 5042. |
Hydrogen bond energy is equal to [UPSEAT 2003] |
| A. | 3 ? 7 kcals |
| B. | 30 ? 70 kcals |
| C. | 3 ? 10 kcals |
| D. | 30 ? 70 kcals |
| Answer» D. 30 ? 70 kcals | |
| 5043. |
Which of the following has minimum melting point [UPSEAT 2003] |
| A. | CsF |
| B. | HCl |
| C. | HF |
| D. | LiF |
| Answer» C. HF | |
| 5044. |
Which of the following compounds has the highest boiling point [JIPMER 2002] |
| A. | HCl |
| B. | HBr |
| C. | |
| D. | |
| Answer» D. | |
| 5045. |
Which one has the highest boiling point [MP PET 2002] |
| A. | Acetone |
| B. | Ethyl alcohol |
| C. | Diethyl ether |
| D. | Chloroform |
| Answer» C. Diethyl ether | |
| 5046. |
has a much higher boiling point than because [UPSEAT 2002; MNR 1994] |
| A. | has a larger molecular weight |
| B. | undergoes umbrella inversion |
| C. | forms hydrogen bond |
| D. | contains ionic bonds whereas contains covalent bonds |
| Answer» D. contains ionic bonds whereas contains covalent bonds | |
| 5047. |
Which contains hydrogen bond [MP PMT 1989] |
| A. | \[HF\] |
| B. | \[HCl\] |
| C. | \[HBr\] |
| D. | \[HI\] |
| Answer» B. \[HCl\] | |
| 5048. |
The boiling point of a compound is raised by [DPMT 2001] |
| A. | Intramolecular hydrogen bonding |
| B. | Intermolecular hydrogen bonding |
| C. | Covalent bonding |
| D. | Ionic covalent |
| Answer» C. Covalent bonding | |
| 5049. |
Which of the following shows hydrogen bonding [CPMT 2000] |
| A. | |
| B. | P |
| C. | As |
| D. | Sb |
| Answer» B. P | |
| 5050. |
Which of the following hydrogen bonds are strongest in vapour phase [AMU 1999] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» B. | |