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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.
| 3301. |
In compounds of type \[EC{{l}_{3}}\], where \[E=B,\] P, As or \[Bi\], the angles \[Cl-E-Cl\] for different E are in the order [IIT-JEE 1999] |
| A. | \[B>P=As=Bi\] |
| B. | \[B>P>As>Bi\] |
| C. | \[B<P=As=Bi\] |
| D. | \[B<P<As<Bi\] |
| Answer» C. \[B<P=As=Bi\] | |
| 3302. |
One mole of calcium phosphide on reaction with excess water gives [IIT-JEE 1999] |
| A. | One mole of phosphine |
| B. | Two moles of phosphoric acid |
| C. | Two moles of phosphine |
| D. | One mole of phosphorous pentoxide |
| Answer» D. One mole of phosphorous pentoxide | |
| 3303. |
Which of the following is manufactured from the molecular nitrogen by bacteria [MP PET 1999] |
| A. | \[N{{O}_{3}}\] |
| B. | \[N{{O}_{2}}\] |
| C. | Amino acids |
| D. | Ammonia |
| Answer» B. \[N{{O}_{2}}\] | |
| 3304. |
Which of the following compound is tribasic acid [AIIMS 2002] |
| A. | \[{{H}_{3}}P{{O}_{2}}\] |
| B. | \[{{H}_{3}}P{{O}_{3}}\] |
| C. | \[{{H}_{3}}P{{O}_{4}}\] |
| D. | \[{{H}_{4}}{{P}_{2}}{{O}_{7}}\] |
| Answer» D. \[{{H}_{4}}{{P}_{2}}{{O}_{7}}\] | |
| 3305. |
Sides of match box have coating of [BHU 1995] |
| A. | Potassium chlorate, red lead |
| B. | Potassium chlorate, antimony sulphide |
| C. | Antimony sulphide, red phosphorus |
| D. | Antimony sulphide, red lead |
| Answer» D. Antimony sulphide, red lead | |
| 3306. |
Which of the following have least covalent \[P-H\] bond [CPMT 1996] |
| A. | \[P{{H}_{3}}\] |
| B. | \[{{P}_{2}}{{H}_{6}}\] |
| C. | \[{{P}_{2}}{{H}_{5}}\] |
| D. | \[PH_{6}^{+}\] |
| Answer» E. | |
| 3307. |
Atomic number of \[N\] is 7. The atomic number of IIIrd member of nitrogen family is [CPMT 1996] |
| A. | 23 |
| B. | 15 |
| C. | 33 |
| D. | 43 |
| Answer» D. 43 | |
| 3308. |
Which gas is obtained when urea is heated with \[HN{{O}_{2}}\] [CPMT 1996] |
| A. | \[{{N}_{2}}\] |
| B. | \[{{H}_{2}}\] |
| C. | \[{{O}_{2}}\] |
| D. | \[N{{H}_{3}}\] |
| Answer» B. \[{{H}_{2}}\] | |
| 3309. |
Which element from V group, gives most basic compound with hydrogen [MP PMT 1995] |
| A. | Nitrogen |
| B. | Bismuth |
| C. | Arsenic |
| D. | Phosphorus |
| Answer» B. Bismuth | |
| 3310. |
Which one of the following hydrides is least stable |
| A. | \[As{{H}_{3}}\] |
| B. | \[Sb{{H}_{3}}\] |
| C. | \[N{{H}_{3}}\] |
| D. | \[P{{H}_{3}}\] |
| Answer» C. \[N{{H}_{3}}\] | |
| 3311. |
In \[N{{H}_{3}}\] and \[P{{H}_{3}}\], the common is [AFMC 1995] |
| A. | Odour |
| B. | Combustibility |
| C. | Basic nature |
| D. | None of these |
| Answer» D. None of these | |
| 3312. |
Which salt can be classified as an acid salt [CPMT 1993] |
| A. | \[N{{a}_{2}}S{{O}_{4}}\] |
| B. | \[BiOCl\] |
| C. | \[Pb(OH)Cl\] |
| D. | \[N{{a}_{2}}HP{{O}_{4}}\] |
| Answer» E. | |
| 3313. |
The formula of an oxyacid of phosphorus is \[{{H}_{3}}P{{O}_{4}}\]. It is a [MP PMT 1996; CPMT 1999; J & K CET 2005] |
| A. | Dibasic acid |
| B. | Monobasic acid |
| C. | Tribasic acid |
| D. | Tetrabasic acid |
| Answer» D. Tetrabasic acid | |
| 3314. |
Nitrogen dioxide cannot be obtained by heating [CPMT 1989; IIT 1985; CPMT 1993] |
| A. | \[KN{{O}_{3}}\] |
| B. | \[Pb{{(N{{O}_{3}})}_{2}}\] |
| C. | \[Cu{{(N{{O}_{3}})}_{2}}\] |
| D. | \[AgN{{O}_{3}}\] |
| Answer» B. \[Pb{{(N{{O}_{3}})}_{2}}\] | |
| 3315. |
Producer gas is a mixture of [DPMT 1982; CPMT 1978] |
| A. | \[CO\] and \[{{N}_{2}}\] |
| B. | \[C{{O}_{2}}\] and\[{{H}_{2}}\] |
| C. | \[CO\] and \[{{H}_{2}}\] |
| D. | \[C{{O}_{2}}\] and \[{{N}_{2}}\] |
| Answer» B. \[C{{O}_{2}}\] and\[{{H}_{2}}\] | |
| 3316. |
Which of the following compounds does not exist [JIPMER 1997] |
| A. | \[SbC{{l}_{3}}\] |
| B. | \[BiC{{l}_{5}}\] |
| C. | \[SbC{{l}_{5}}\] |
| D. | \[AsC{{l}_{5}}\] |
| Answer» C. \[SbC{{l}_{5}}\] | |
| 3317. |
Conc.\[HN{{O}_{3}}\] can be stored in container of [MH CET 2001] |
| A. | Al |
| B. | Sn |
| C. | Cu |
| D. | Zn |
| Answer» B. Sn | |
| 3318. |
The oxidation number of phosphorus vary from [Kurukshetra CEE 1998; DCE 2001] |
| A. | -1 to +3 |
| B. | -3 to +3 |
| C. | -3 to +5 |
| D. | -5 to +1 |
| Answer» D. -5 to +1 | |
| 3319. |
Which oxide of nitrogen is obtained on heating ammonium nitrate at \[{{250}^{o}}C\] [AIIMS 1999] |
| A. | Nitric oxide |
| B. | Nitrous oxide |
| C. | Nitrogen dioxide |
| D. | Dinitrogen oxide |
| Answer» C. Nitrogen dioxide | |
| 3320. |
Aqua-regia is [Orissa JEE 2005] |
| A. | 1 : 3 conc. \[HN{{O}_{3}}\] and conc. \[HCl\] |
| B. | 1 : 2 conc. \[HN{{O}_{3}}\] and conc. \[HCl\] |
| C. | 3 : 1 conc. \[HN{{O}_{3}}\] and conc. \[HCl\] |
| D. | 2 : 1 conc. \[HN{{O}_{3}}\] and conc. \[HCl\] |
| Answer» B. 1 : 2 conc. \[HN{{O}_{3}}\] and conc. \[HCl\] | |
| 3321. |
Repeated use of which of the following fertilizers would increase the acidity of the soil [CBSE PMT 1998] |
| A. | Urea |
| B. | Potassium nitrate |
| C. | Ammonium sulphate |
| D. | Superphosphate of lime |
| Answer» D. Superphosphate of lime | |
| 3322. |
Which of the following has the highest dipole moment [CBSE PMT 1997] |
| A. | \[N{{H}_{3}}\] |
| B. | \[P{{H}_{3}}\] |
| C. | \[Sb{{H}_{3}}\] |
| D. | \[As{{H}_{3}}\] |
| Answer» B. \[P{{H}_{3}}\] | |
| 3323. |
The carbonate which does not leave a residue on heating is [JIPMER 1999; DCE 1999] |
| A. | \[N{{a}_{2}}C{{O}_{3}}\] |
| B. | \[A{{g}_{2}}C{{O}_{3}}\] |
| C. | \[CuC{{O}_{3}}\] |
| D. | \[{{(N{{H}_{4}})}_{2}}C{{O}_{3}}\] |
| Answer» E. | |
| 3324. |
\[HN{{O}_{2}}\] acts as [AFMC 1992] |
| A. | Oxidising agent |
| B. | Reducing agent |
| C. | Both a and b |
| D. | Its solution is stable |
| Answer» D. Its solution is stable | |
| 3325. |
Which of the following compounds is sparingly soluble in ammonia [JIPMER 1999] |
| A. | \[AgI\] |
| B. | \[AgBr\] |
| C. | \[AgCl\] |
| D. | \[CuC{{l}_{2}}\] |
| Answer» B. \[AgBr\] | |
| 3326. |
Ammonia is dried over [CPMT 2002; JIPMER 2002] |
| A. | Quick lime |
| B. | Slaked lime |
| C. | Anhy.\[CaC{{l}_{2}}\] |
| D. | None of these |
| Answer» B. Slaked lime | |
| 3327. |
Which compound is related to Haber's process [RPET 1999] |
| A. | \[C{{O}_{2}}\] |
| B. | \[{{H}_{2}}\] |
| C. | \[N{{O}_{2}}\] |
| D. | \[N{{H}_{3}}\] |
| Answer» E. | |
| 3328. |
Which of the following is nitrogenous fertilizers [CPMT 1999] |
| A. | Bone meal |
| B. | Thomas meal |
| C. | Nitro phosphate |
| D. | Ammonium sulphate |
| Answer» E. | |
| 3329. |
When \[HN{{O}_{3}}\] is dropped into the palm and washed with water, it turns into yellow. It shows the presence of [CPMT 1997] |
| A. | \[N{{O}_{2}}\] |
| B. | \[{{N}_{2}}O\] |
| C. | \[NO\] |
| D. | \[{{N}_{2}}{{O}_{5}}\] |
| Answer» B. \[{{N}_{2}}O\] | |
| 3330. |
The product obtained by heating\[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\]and \[KCNO\]is [DPMT 2000] |
| A. | Hydrocyanic acid |
| B. | Ammonia |
| C. | Ammonium cyanide |
| D. | Urea |
| Answer» E. | |
| 3331. |
On adding excess of ammonium hydroxide to a copper chloride solution. [MH CET 1999] |
| A. | A deep blue solution is obtained |
| B. | No change is observed |
| C. | Blue precipitate of copper hydroxide is obtained |
| D. | Black precipitate of copper oxide is obtained |
| Answer» B. No change is observed | |
| 3332. |
Which show maximum valency [CPMT 2003] |
| A. | Phosphorus |
| B. | Tin |
| C. | Antimony |
| D. | Bismuth |
| Answer» B. Tin | |
| 3333. |
Inertness of \[{{N}_{2}}\] gas is due to [DCE 2000; MP PET 2001] |
| A. | No vacant d-orbital |
| B. | High dissociation energy |
| C. | High electronegativity |
| D. | None |
| Answer» C. High electronegativity | |
| 3334. |
\[{{P}_{2}}{{O}_{5}}\] is used extensively as a [BVP 2003] |
| A. | Reducing agent |
| B. | Oxidising agent |
| C. | Dehydrating agent |
| D. | Preservative |
| Answer» D. Preservative | |
| 3335. |
When ammonia reacts with sodium hypochlorite, product containing nitrogen is [AFMC 2000] |
| A. | \[{{N}_{2}}\] |
| B. | \[{{N}_{2}}O\] |
| C. | \[N{{H}_{2}}OH\] |
| D. | \[{{H}_{2}}O\] |
| Answer» E. | |
| 3336. |
What may be expected to happen when phosphine gas is mixed with chlorine gas [AIEEE 2003] |
| A. | The mixture only cools down |
| B. | \[PC{{l}_{3}}\] and HCl are formed and the mixture warms up |
| C. | \[PC{{l}_{5}}\] and HCl are formed and the mixture cools down |
| D. | \[P{{H}_{3}}.\,C{{l}_{2}}\] is formed with warming up |
| Answer» D. \[P{{H}_{3}}.\,C{{l}_{2}}\] is formed with warming up | |
| 3337. |
Solution of sodium metal in liquid ammonia is strongly reducing due to the presence in the solution of the following [KCET 2000; MP PMT 2001] |
| A. | Sodium hydride |
| B. | Sodium amide |
| C. | Sodium atoms |
| D. | Solvated electrons |
| Answer» E. | |
| 3338. |
The reaction, which forms nitric oxide, is [KCET (Med.) 2001] |
| A. | C and \[{{O}_{2}}\] |
| B. | \[Cu\] and \[{{N}_{2}}O\] |
| C. | \[Na\] and \[N{{H}_{3}}\] |
| D. | \[Cu\] and \[HN{{O}_{3}}\] |
| Answer» E. | |
| 3339. |
Which of the following is a cyclic phosphate [KCET 1996] |
| A. | \[{{H}_{5}}{{P}_{3}}{{O}_{10}}\] |
| B. | \[{{H}_{6}}{{P}_{4}}{{O}_{13}}\] |
| C. | \[{{H}_{5}}{{P}_{5}}{{O}_{15}}\] |
| D. | \[{{H}_{7}}{{P}_{5}}{{O}_{16}}\] |
| Answer» D. \[{{H}_{7}}{{P}_{5}}{{O}_{16}}\] | |
| 3340. |
Which of the following is solid in nature [UPSEAT 2003; AFMC 2004] |
| A. | \[NO\] |
| B. | \[{{N}_{2}}O\] |
| C. | \[{{N}_{2}}{{O}_{3}}\] |
| D. | \[{{N}_{2}}{{O}_{5}}\] |
| Answer» E. | |
| 3341. |
Which of the following elements is most metallic [CPMT 1983; MP PMT 1993] |
| A. | Phosphorus |
| B. | Arsenic |
| C. | Antimony |
| D. | Bismuth |
| Answer» E. | |
| 3342. |
Sodium pyrophosphate is [CPMT 2003] |
| A. | \[N{{a}_{2}}{{P}_{2}}{{O}_{7}}\] |
| B. | \[N{{a}_{4}}{{P}_{2}}{{O}_{7}}\] |
| C. | \[NaP{{O}_{4}}\] |
| D. | \[N{{a}_{2}}P{{O}_{2}}\] |
| Answer» C. \[NaP{{O}_{4}}\] | |
| 3343. |
\[{{N}_{2}}\] combines with metal to form [JIPMER 2000] |
| A. | Nitride |
| B. | Nitrate |
| C. | Nitrite |
| D. | Nitrosyl chloride |
| Answer» B. Nitrate | |
| 3344. |
Nitrogen is obtained when \[NaN{{O}_{2}}\] reacts with [UPSEAT 2003] |
| A. | \[N{{H}_{4}}Cl\] |
| B. | \[N{{H}_{4}}N{{O}_{3}}\] |
| C. | \[{{(N{{H}_{4}})}_{2}}C{{O}_{3}}\] |
| D. | \[N{{H}_{4}}OH\] |
| Answer» B. \[N{{H}_{4}}N{{O}_{3}}\] | |
| 3345. |
A neutral fertilizer among the following compounds is [KCET 2002] |
| A. | Urea |
| B. | Ammonium nitrate |
| C. | Ammonium sulphate |
| D. | Calcium ammonium nitrate |
| Answer» C. Ammonium sulphate | |
| 3346. |
The pentavalence in phosphorus is more stable as compared to that of nitrogen even though they belong to the same group. It is due to [KCET 2002] |
| A. | Inert nature of nitrogen |
| B. | Reactivity of phosphorus |
| C. | Larger size of phosphorus atom |
| D. | Dissimilar electronic configuration |
| Answer» D. Dissimilar electronic configuration | |
| 3347. |
What would happen when a solution of potassium chromate is treated with an excess of dilute nitric acid [AIEEE 2003] |
| A. | \[C{{r}^{3+}}\] and \[C{{r}_{2}}O_{7}^{2-}\] are formed |
| B. | \[C{{r}_{2}}O_{7}^{2-}\]and \[{{H}_{2}}O\] are formed |
| C. | \[CrO_{4}^{2-}\] is reduced to \[+3\] state of \[Cr\] |
| D. | \[CrO_{4}^{2-}\] is oxidized to \[+7\] state of \[Cr\] |
| Answer» C. \[CrO_{4}^{2-}\] is reduced to \[+3\] state of \[Cr\] | |
| 3348. |
How can you synthesize nitric oxide in the laboratory [Orissa JEE 2003] |
| A. | Zinc with cold and dilute \[HN{{O}_{3}}\] |
| B. | Zinc with concentrated \[HN{{O}_{3}}\] |
| C. | Copper with cold and dilute \[HN{{O}_{3}}\] |
| D. | Heating \[N{{H}_{4}}N{{O}_{3}}\] |
| Answer» D. Heating \[N{{H}_{4}}N{{O}_{3}}\] | |
| 3349. |
Phosphine is generally prepared in the laboratory [CPMT 1983, 2003] |
| A. | By heating phosphorus in a current of hydrogen |
| B. | By heating white phosphorus with aqueous solution of caustic potash |
| C. | By decomposition of \[{{P}_{2}}{{H}_{4}}\] at \[{{110}^{o}}C\] |
| D. | By heating red phosphorus with an aqueous solution of caustic soda |
| Answer» C. By decomposition of \[{{P}_{2}}{{H}_{4}}\] at \[{{110}^{o}}C\] | |
| 3350. |
Liquid ammonia is used for refrigeration because [MP PET 2002] |
| A. | It has a high dipole moment |
| B. | It has a high heat of vapourisation |
| C. | It is basic |
| D. | It is a stable compound |
| Answer» C. It is basic | |