MCQOPTIONS
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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.
| 4951. |
The oxidation states shown by hydrogen are |
| A. | -1 only |
| B. | Zero only |
| C. | +1, -1, 0 |
| D. | +1 only |
| Answer» D. +1 only | |
| 4952. |
Hydrogen readily combines with non-metals and thus it shows its |
| A. | Electronegativity character |
| B. | Electropositive character |
| C. | Both a and b |
| D. | None of these |
| Answer» C. Both a and b | |
| 4953. |
Which position for hydrogen explain all its properties |
| A. | At the top of halogen |
| B. | At the top of alkali metals |
| C. | At the top of carbon family |
| D. | None of these |
| Answer» E. | |
| 4954. |
Hydrogen acts as a reducing agent and thus resembles |
| A. | Halogen |
| B. | Noble gas |
| C. | Radioactive elements |
| D. | Alkali metals |
| Answer» E. | |
| 4955. |
Ionization energy of hydrogen is |
| A. | Equal to that of chlorine |
| B. | Lesser than that of chlorine |
| C. | Slightly higher than that of chlorine |
| D. | Much higher than that of chlorine |
| Answer» D. Much higher than that of chlorine | |
| 4956. |
Which is distilled first [Pb. PMT 2002] |
| A. | Liquid \[C{{O}_{2}}\] |
| B. | Liquid \[{{N}_{2}}\] |
| C. | Liquid \[{{O}_{2}}\] |
| D. | Liquid \[{{H}_{2}}\] |
| Answer» E. | |
| 4957. |
Hydrogen is |
| A. | Electropositive |
| B. | Electronegative |
| C. | Both electropositive as well as electronegative |
| D. | Neither electropositive nor electronegative |
| Answer» D. Neither electropositive nor electronegative | |
| 4958. |
Which of the following statements is most applicable to hydrogen |
| A. | It can act as a reducing agent |
| B. | It can act as an oxidising agent |
| C. | It can act both as oxidising and reducing agent |
| D. | It can neither act as oxidising nor as a reducing agent |
| Answer» D. It can neither act as oxidising nor as a reducing agent | |
| 4959. |
Which of the halogen has maximum affinity for hydrogen |
| A. | \[{{F}_{2}}\] |
| B. | \[C{{l}_{2}}\] |
| C. | \[B{{r}_{2}}\] |
| D. | \[{{I}_{2}}\] |
| Answer» B. \[C{{l}_{2}}\] | |
| 4960. |
When electric current is passed through an ionic hydride in the molten state |
| A. | Hydrogen is liberated at the anode |
| B. | Hydrogen is liberated at the cathode |
| C. | No reaction takes place |
| D. | Hydride ion migrates towards cathode |
| Answer» B. Hydrogen is liberated at the cathode | |
| 4961. |
Which of the following terms is not correct for hydrogen |
| A. | Its molecule is diatomic |
| B. | It exists both as \[{{H}^{+}}\] and \[{{H}^{-}}\] in different chemical compounds |
| C. | It is the only species which has no neutrons in the nucleus |
| D. | Heavy water is unstable because hydrogen is substituted by its isotope deuterium |
| Answer» E. | |
| 4962. |
Which of the following explanation is best for not placing hydrogen with alkali metals or halogen |
| A. | The ionization energy of hydrogen is high for group of alkali metals or halogen |
| B. | Hydrogen can form compounds |
| C. | Hydrogen is a much lighter element than the alkali metals or halogens |
| D. | Hydrogen atom does not contain any neutron |
| Answer» D. Hydrogen atom does not contain any neutron | |
| 4963. |
Hydrogen combines with other elements by |
| A. | Losing an electron |
| B. | Gaining an electron |
| C. | Sharing an electron |
| D. | Losing, gaining or sharing electron |
| Answer» E. | |
| 4964. |
An element reacts with hydrogen to form a compound A which on treatment with water liberates hydrogen gas. The element can be |
| A. | Nitrogen |
| B. | Chlorine |
| C. | Selenium |
| D. | Calcium |
| Answer» E. | |
| 4965. |
Which of the following metal do not liberate hydrogen from dilute hydrochloric acid |
| A. | Zn |
| B. | Mg |
| C. | Fe |
| D. | Au |
| Answer» E. | |
| 4966. |
Hydrogen can be prepared by mixing steam, and water gas at 500°C in the presence of \[F{{e}_{3}}{{O}_{4}}\] and \[C{{r}_{2}}{{O}_{3}}\]. This process is called |
| A. | Nelson process |
| B. | Serpeck?s process |
| C. | Bosch process |
| D. | Parke?s process |
| Answer» D. Parke?s process | |
| 4967. |
Which pair does not show hydrogen isotopes [UPSEAT 2003] |
| A. | Ortho hydrogen and para hydrogen |
| B. | Protium and deuterium |
| C. | Deuterium and tritium |
| D. | Tritium and protium |
| Answer» B. Protium and deuterium | |
| 4968. |
Hydrogen can be fused to form helium at [AFMC 2005] |
| A. | High temperature and high pressure |
| B. | High temperature and low pressure |
| C. | Low temperature and high pressure |
| D. | Low temperature and low pressure |
| Answer» B. High temperature and low pressure | |
| 4969. |
Hydrogen ion \[{{H}^{-}}\] is isoelectronic with |
| A. | Li |
| B. | He |
| C. | \[{{H}^{+}}\] |
| D. | \[L{{i}^{-}}\] |
| Answer» C. \[{{H}^{+}}\] | |
| 4970. |
The difference between heat of adsorption of ortho and para hydrogen is |
| A. | \[0.4kJ\text{ }mo{{l}^{1}}\] |
| B. | \[0.8kJ\text{ }mo{{l}^{1}}\] |
| C. | Zero |
| D. | None of these |
| Answer» B. \[0.8kJ\text{ }mo{{l}^{1}}\] | |
| 4971. |
Ortho-hydrogen and para-hydrogen resembles in which of the following property |
| A. | Thermal conductivity |
| B. | Magnetic properties |
| C. | Chemical properties |
| D. | Heat capacity |
| Answer» D. Heat capacity | |
| 4972. |
An ionic compound is dissolved simultaneously in heavy water and simple water. Its solubility is |
| A. | Larger in heavy water |
| B. | Smaller in heavy water |
| C. | Solubility is same in both |
| D. | Smaller in simple water |
| Answer» C. Solubility is same in both | |
| 4973. |
Number of nucleons in \[{{D}_{2}}\] molecule is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 4974. |
The sum of protons, electrons and neutrons in the heaviest isotope of hydrogen is |
| A. | 6 |
| B. | 5 |
| C. | 4 |
| D. | 3 |
| Answer» D. 3 | |
| 4975. |
Which is poorest reducing agent |
| A. | Nascent hydrogen |
| B. | Atomic hydrogen |
| C. | Dihydrogen |
| D. | All have same reducing strength |
| Answer» D. All have same reducing strength | |
| 4976. |
Metals like platinum and palladium can absorb large volumes of hydrogen under special conditions. Such adsorbed hydrogen by the metal is known as |
| A. | Adsorbed hydrogen |
| B. | Occluded hydrogen |
| C. | Reactive hydrogen |
| D. | Atomic hydrogen |
| Answer» C. Reactive hydrogen | |
| 4977. |
The metal which displaces hydrogen from a boiling caustic soda solution is |
| A. | As |
| B. | Zn |
| C. | Mg |
| D. | Fe |
| Answer» C. Mg | |
| 4978. |
Hydrogen burns in air with a [RPET 2003] |
| A. | Light bluish flame |
| B. | Yellow flame |
| C. | Green flame |
| D. | None of these |
| Answer» B. Yellow flame | |
| 4979. |
Which of the following produces hydrolith with dihydrogen |
| A. | Mg |
| B. | Al |
| C. | Cu |
| D. | Ca |
| Answer» E. | |
| 4980. |
The adsorption of hydrogen by metals is called [EAMCET 1999; Manipal PMT 1999] |
| A. | Dehydrogenation |
| B. | Hydrogenation |
| C. | Occlusion |
| D. | Adsorption |
| Answer» D. Adsorption | |
| 4981. |
Hydrogen does not combine with |
| A. | Antimony |
| B. | Sodium |
| C. | Bismuth |
| D. | Helium |
| Answer» E. | |
| 4982. |
Hydrogen cannot reduce |
| A. | Hot CuO |
| B. | \[F{{e}_{2}}{{O}_{3}}\] |
| C. | Hot \[Sn{{O}_{2}}\] |
| D. | Hot \[A{{l}_{2}}{{O}_{3}}\] |
| Answer» E. | |
| 4983. |
Ordinary hydrogen at room temperature is a mixture of |
| A. | 75% of o-Hydrogen + 25% of p-Hydrogen |
| B. | 25% of o-Hydrogen + 75% of p-Hydrogen |
| C. | 50% of o-Hydrogen + 50% of p-Hydrogen |
| D. | 1% of o-Hydrogen + 99% of p-Hydrogen |
| Answer» B. 25% of o-Hydrogen + 75% of p-Hydrogen | |
| 4984. |
The colour of hydrogen is [MP PET 2004] |
| A. | Black |
| B. | Yellow |
| C. | Orange |
| D. | Colourless |
| Answer» E. | |
| 4985. |
The nuclei of tritium \[({{H}^{3}})\] atom would contain neutrons |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 4986. |
Which of the following can adsorb largest volume of hydrogen gas |
| A. | Finely divided platinum |
| B. | Finely divided nickel |
| C. | Colloidal palladium |
| D. | Colloidal platinum |
| Answer» D. Colloidal platinum | |
| 4987. |
Hydrogen from HCl can be prepared by [Pb. CET 1997] |
| A. | Mg |
| B. | Cu |
| C. | P |
| D. | Pt. |
| Answer» B. Cu | |
| 4988. |
Action of water or dilute mineral acids on metals can give [Kerala (Med.) 2002] |
| A. | Monohydrogen |
| B. | Tritium |
| C. | Dihydrogen |
| D. | Trihydrogen |
| Answer» D. Trihydrogen | |
| 4989. |
Ortho and para hydrogen differ in [AFMC 2001] |
| A. | Proton spin |
| B. | Electron spin |
| C. | Nuclear charge |
| D. | Nuclear reaction |
| Answer» B. Electron spin | |
| 4990. |
Hydrogen resembles in many of its properties [MH CET 2001] |
| A. | Halogen |
| B. | Alkali metals |
| C. | Both a and b |
| D. | None of these |
| Answer» D. None of these | |
| 4991. |
Metal hydride on treatment with water gives [Bihar CEE 1995] |
| A. | \[{{H}_{2}}{{O}_{2}}\] |
| B. | \[{{H}_{2}}O\] |
| C. | Acid |
| D. | Hydrogen |
| Answer» E. | |
| 4992. |
Which is used hydrogen generators [CPMT 1999] |
| A. | NaH |
| B. | HI |
| C. | \[{{S}_{6}}{{H}_{3}}\] |
| D. | None of these |
| Answer» B. HI | |
| 4993. |
The reaction of \[{{H}_{2}}S+{{H}_{2}}{{O}_{2}}\to S+2{{H}_{2}}O\] manifests [UPSEAT 2000] |
| A. | Acidic nature of \[{{H}_{2}}{{O}_{2}}\] |
| B. | Alkaline nature of \[{{H}_{2}}{{O}_{2}}\] |
| C. | Oxidising nature of \[{{H}_{2}}{{O}_{2}}\] |
| D. | Reducing action of \[{{H}_{2}}{{O}_{2}}\] |
| Answer» D. Reducing action of \[{{H}_{2}}{{O}_{2}}\] | |
| 4994. |
Hydrogen peroxide is reduced by [CPMT 2000; CBSE PMT 2000; KCET 2002] |
| A. | Ozone |
| B. | Barium peroxide |
| C. | Acidic solution of \[KMn{{O}_{4}}\] |
| D. | Lead sulphide suspension |
| Answer» E. | |
| 4995. |
The oxide that gives hydrogen peroxide \[({{H}_{2}}{{O}_{2}})\] on the treatment with a dilute acid \[({{H}_{2}}S{{O}_{4}})\] is [Pb. PMT 1999] |
| A. | \[Mn{{O}_{2}}\] |
| B. | \[Pb{{O}_{2}}\] |
| C. | \[N{{a}_{2}}{{O}_{2}}\] |
| D. | \[Ti{{O}_{2}}\] |
| Answer» D. \[Ti{{O}_{2}}\] | |
| 4996. |
The volume of oxygen liberated from \[0.68gm\] of \[{{H}_{2}}{{O}_{2}}\] is [Pb. PMT 2004] |
| A. | \[112\,ml\] |
| B. | \[224\,ml\] |
| C. | \[56\,ml\] |
| D. | \[336\,ml\] |
| Answer» C. \[56\,ml\] | |
| 4997. |
HCl is added to the following oxides which one would give \[{{H}_{2}}{{O}_{2}}\] [Kurukshetra CEE 1998] |
| A. | \[Mn{{O}_{2}}\] |
| B. | \[Pb{{O}_{2}}\] |
| C. | \[Ba{{O}_{2}}\] |
| D. | None of these |
| Answer» D. None of these | |
| 4998. |
The \[H-O-O\] bond angle in \[{{H}_{2}}{{O}_{2}}\] is [Kerala PMT 2004] |
| A. | \[{{107.28}^{o}}\] |
| B. | \[{{109.28}^{o}}\] |
| C. | \[{{104.5}^{o}}\] |
| D. | \[{{106}^{o}}\] |
| E. | \[{{97}^{o}}\] |
| Answer» F. | |
| 4999. |
\[{{H}_{2}}{{O}_{2}}\] acts as an oxidising agent in [Kerala PMT 2004] |
| A. | Neutral medium |
| B. | Acidic medium |
| C. | Alkaline medium |
| D. | Alkaline and neutral medium |
| E. | Acidic and alkaline medium |
| Answer» F. | |
| 5000. |
In which of the following reactions, \[{{H}_{2}}{{O}_{2}}\] acts as a reducing agent [EAMCET 2001] |
| A. | \[Pb{{O}_{2}}(s)+{{H}_{2}}{{O}_{2}}(aq)\to PbO(s)+{{H}_{2}}O(l)+{{O}_{2}}(g)\] |
| B. | \[N{{a}_{2}}S{{O}_{3}}(aq)+{{H}_{2}}{{O}_{2}}(aq)\to N{{a}_{2}}S{{O}_{4}}(aq)+{{H}_{2}}O(l)\] |
| C. | \[2Kl(aq)+{{H}_{2}}{{O}_{2}}(aq)\to 2KOH(aq)+{{I}_{2}}(s)\] |
| D. | \[KN{{O}_{2}}(aq)+{{H}_{2}}{{O}_{2}}(aq)\to KN{{O}_{3}}(aq)+{{H}_{2}}O(l)\] |
| Answer» B. \[N{{a}_{2}}S{{O}_{3}}(aq)+{{H}_{2}}{{O}_{2}}(aq)\to N{{a}_{2}}S{{O}_{4}}(aq)+{{H}_{2}}O(l)\] | |