MCQOPTIONS
Saved Bookmarks
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.
| 3351. |
Urea is preferred to ammonium sulphate as a nitrogeneous fertilizer because [KCET 2003] |
| A. | It is more soluble in water |
| B. | It is cheaper than ammonium sulphate |
| C. | It is quite stable |
| D. | It does not cause acidity in the soil |
| Answer» E. | |
| 3352. |
In case of nitrogen, \[NC{{l}_{3}}\] is possible but not \[NC{{l}_{5}}\] while in case of phosphorous, \[PC{{l}_{3}}\] as well as \[PC{{l}_{5}}\]are possible. It is due to [AIEEE 2002] |
| A. | Availability of vacant d-orbital in P but not in N |
| B. | Lower electronegativity of P than N |
| C. | Lower tendency of H bond formation in P than N |
| D. | Occurrence of P in solid while N in gaseous state at room temperature |
| Answer» B. Lower electronegativity of P than N | |
| 3353. |
The three important oxidation states of phosphorus are [Kerala (Med.) 2002] |
| A. | \[-3,\,+3\] and \[+5\] |
| B. | \[-3,\,+3\] and \[-5\] |
| C. | \[-3,\,+4\] and \[-4\] |
| D. | \[-3,\,+3\] and \[+4\] |
| Answer» B. \[-3,\,+3\] and \[-5\] | |
| 3354. |
The most common minerals of phosphorus are [Kerala (Med.) 2002] |
| A. | Hydroxy apatite and kernite |
| B. | Colemanite and fluoraptite |
| C. | Borax and fluoraptite |
| D. | Hydroxy apatite and colemanite |
| E. | Hydroxy apatite and fluorapatile |
| Answer» F. | |
| 3355. |
Atoms in a \[{{P}_{4}}\] molecule of white phosphorus are arranged regularly in space in which of the following way [Kerala (Engg.) 2002] |
| A. | At the corners of tetrahedron |
| B. | At the corners of a cube |
| C. | At the corners of a four membered ring |
| D. | At the centre and corners of an equilateral triangle |
| Answer» B. At the corners of a cube | |
| 3356. |
Solid \[PC{{l}_{5}}\] exits as [JIPMER 2002] |
| A. | \[PC{{l}_{5}}\] |
| B. | \[PCl_{4}^{+}\] |
| C. | \[PCl_{6}^{-}\] |
| D. | \[PCl_{4}^{+}\] and \[PCl_{6}^{-}\] |
| Answer» E. | |
| 3357. |
Superphosphate is a mixture of [KCET (Med.) 2001] |
| A. | \[Ca{{({{H}_{2}}P{{O}_{4}})}_{2}}{{H}_{2}}O+CaC{{l}_{2}}\,.\,2{{H}_{2}}O\] |
| B. | \[C{{a}_{3}}{{(P{{O}_{4}})}_{2}}\,.\,{{H}_{2}}O+CaC{{l}_{2}}\,.\,2{{H}_{2}}O\] |
| C. | \[C{{a}_{3}}{{(P{{O}_{4}})}_{2}}\,.\,{{H}_{2}}O+2CaS{{O}_{4}}\,.\,2{{H}_{2}}O\] |
| D. | \[Ca{{({{H}_{2}}P{{O}_{4}})}_{2}}.\,{{H}_{2}}O+2CaS{{O}_{4}}\,.\,2{{H}_{2}}O\] |
| Answer» E. | |
| 3358. |
\[HN{{O}_{3}}\] in aqueous solution yields [AMU 2000] |
| A. | \[NO_{3}^{-}\] and \[{{H}^{+}}\] |
| B. | \[NO_{3}^{-}\] and \[{{H}_{3}}{{O}^{+}}\] |
| C. | \[NO_{2}^{-}\] and \[O{{H}^{-}}\] |
| D. | \[{{N}_{2}}{{O}_{5}}\] and \[{{H}_{2}}O\] |
| Answer» C. \[NO_{2}^{-}\] and \[O{{H}^{-}}\] | |
| 3359. |
In the following reaction \[{{P}_{4}}+3NaOH+3{{H}_{2}}O\to P{{H}_{3}}+3Na{{H}_{2}}P{{O}_{2}}\] [MP PMT 1994] |
| A. | Phosphorus is oxidised |
| B. | Phosphorus is oxidised and reduced |
| C. | Phosphorus is reduced |
| D. | Sodium is oxidized |
| Answer» C. Phosphorus is reduced | |
| 3360. |
Which of the following has highest boiling point [MP PET 1994] |
| A. | \[N{{H}_{3}}\] |
| B. | \[P{{H}_{3}}\] |
| C. | \[As{{H}_{3}}\] |
| D. | \[Sb{{H}_{3}}\] |
| Answer» E. | |
| 3361. |
Which of the following exhibits highest solubility in water [MP PET 1994] |
| A. | \[N{{H}_{3}}\] |
| B. | \[P{{H}_{3}}\] |
| C. | \[As{{H}_{3}}\] |
| D. | \[Sb{{H}_{3}}\] |
| Answer» B. \[P{{H}_{3}}\] | |
| 3362. |
Sodium hydroxide solution reacts with phosphorus to give phosphine. To bring about this reaction, we need [KCET 1989] |
| A. | White phosphorus and dil. \[NaOH\] |
| B. | White phosphorus and conc. \[NaOH\] |
| C. | Red phosphorus and dil. \[NaOH\] |
| D. | Red phosphorus and conc. \[NaOH\] |
| Answer» C. Red phosphorus and dil. \[NaOH\] | |
| 3363. |
Blasting of TNT is done by mixing [AFMC 1993] |
| A. | \[N{{H}_{4}}Cl\] |
| B. | \[N{{H}_{4}}N{{O}_{3}}\] |
| C. | \[N{{H}_{4}}N{{O}_{2}}\] |
| D. | \[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\] |
| Answer» C. \[N{{H}_{4}}N{{O}_{2}}\] | |
| 3364. |
When equal weights of the two fertilizers, urea and ammonium sulphate are taken, urea contains [KCET 1989] |
| A. | Less nitrogen than ammonium sulphate |
| B. | As much nitrogen as ammonium sulphate |
| C. | Twice the amount of nitrogen present in ammonium sulphate |
| D. | More than twice the amount of nitrogen present in ammonium sulphate |
| Answer» E. | |
| 3365. |
Among the following nitrates, Lead nitrate, Silver nitrate and Ammonium nitrate; the one that decomposes without leaving any solid residue is [NCERT 1983] |
| A. | Lead nitrate |
| B. | Ammonium nitrate |
| C. | Silver nitrate |
| D. | Sodium nitrate |
| Answer» C. Silver nitrate | |
| 3366. |
Thomas slag is [CPMT 1988] |
| A. | \[C{{a}_{3}}{{(P{{O}_{4}})}_{2}}\] |
| B. | \[MnSi{{O}_{3}}\] |
| C. | \[CaSi{{O}_{3}}\] |
| D. | \[FeSi{{O}_{3}}\] |
| Answer» B. \[MnSi{{O}_{3}}\] | |
| 3367. |
Which one has the highest percentage of nitrogen [KCET 1991; CBSE PMT 1993; AIIMS 1996, MP PET 2001; RPET 2003] |
| A. | Urea |
| B. | Ammonium sulphate |
| C. | Ammonium nitrate |
| D. | Calcium nitrate |
| Answer» B. Ammonium sulphate | |
| 3368. |
At high temperature nitrogen combines with calcium carbide \[(Ca{{C}_{2}})\] to give [DPMT 1981, 85; AFMC 1998; MP PET 2000] |
| A. | Calcium cyanide |
| B. | Calcium cyanamide |
| C. | Calcium carbonate |
| D. | Calcium nitride |
| Answer» C. Calcium carbonate | |
| 3369. |
\[BiC{{l}_{3}}\] on hydrolysis forms a white precipitate of [CPMT 1988] |
| A. | Bismuthio acid |
| B. | Bismuth oxychloride |
| C. | Bismuth pentachloride |
| D. | Bismuth hydroxide |
| Answer» C. Bismuth pentachloride | |
| 3370. |
The number of hydroxyl group in pyrophosphoric acid is [KCET 1993] |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 7 |
| Answer» C. 5 | |
| 3371. |
Cyanamide process is used in the formation of [BHU 1995] |
| A. | \[{{N}_{2}}\] |
| B. | \[HN{{O}_{3}}\] |
| C. | \[N{{H}_{3}}\] |
| D. | \[P{{H}_{3}}\] |
| Answer» D. \[P{{H}_{3}}\] | |
| 3372. |
In Birkeland-Eyde process, the raw material used is [CPMT 1982, 86] |
| A. | Air |
| B. | \[N{{H}_{3}}\] |
| C. | \[N{{O}_{2}}\] |
| D. | \[HN{{O}_{3}}\] |
| Answer» B. \[N{{H}_{3}}\] | |
| 3373. |
Which is not an acid salt [MNR 1989] |
| A. | \[Na{{H}_{2}}P{{O}_{3}}\] |
| B. | \[Na{{H}_{2}}P{{O}_{2}}\] |
| C. | \[N{{a}_{3}}H{{P}_{2}}{{O}_{6}}\] |
| D. | \[N{{a}_{4}}{{P}_{2}}{{O}_{7}}\] |
| Answer» E. | |
| 3374. |
Oxidation state of + 1 for phosphorus is found in [MP PMT 1991; MP PET 2001] |
| A. | \[{{H}_{3}}P{{O}_{3}}\] |
| B. | \[{{H}_{3}}P{{O}_{4}}\] |
| C. | \[{{H}_{3}}P{{O}_{2}}\] |
| D. | \[{{H}_{4}}{{P}_{2}}{{O}_{7}}\] |
| Answer» D. \[{{H}_{4}}{{P}_{2}}{{O}_{7}}\] | |
| 3375. |
\[{{H}_{3}}P{{O}_{3}}\] is [CPMT 1977, 79, 94; NCERT 1981; MP PMT 1980] |
| A. | A tribasic acid |
| B. | A dibasic acid |
| C. | Neutral |
| D. | A monobasic acid |
| Answer» C. Neutral | |
| 3376. |
\[PC{{l}_{3}}\] reacts with water to form [KCET 1990; CBSE PMT 1991; CPMT 2003] |
| A. | \[P{{H}_{3}}\] |
| B. | \[{{H}_{3}}P{{O}_{3}},\]\[HCl\] |
| C. | \[POC{{l}_{3}}\] |
| D. | \[{{H}_{3}}P{{O}_{4}}\] |
| Answer» C. \[POC{{l}_{3}}\] | |
| 3377. |
\[{{P}_{2}}{{O}_{5}}\] is heated with water to give [CBSE PMT 1991; DPMT 2000] |
| A. | Hypophosphorus acid |
| B. | Orthophosphorus acid |
| C. | Hypophosphoric acid |
| D. | Orthophosphoric acid |
| Answer» E. | |
| 3378. |
One of the acid listed below is formed from \[{{P}_{2}}{{O}_{3}}\] and the rest are formed from \[{{P}_{2}}{{O}_{5}}\]. The acid formed from phosphorus (III) oxide is [NCERT 1975] |
| A. | \[HP{{O}_{3}}\] |
| B. | \[{{H}_{4}}{{P}_{2}}{{O}_{7}}\] |
| C. | \[{{H}_{3}}P{{O}_{4}}\] |
| D. | \[{{H}_{3}}P{{O}_{3}}\] |
| Answer» E. | |
| 3379. |
With reference to protonic acids, which of the following statements is correct [CPMT 1990] |
| A. | \[P{{H}_{3}}\] is more basic than \[N{{H}_{3}}\] |
| B. | \[P{{H}_{3}}\] is less basic than \[N{{H}_{3}}\] |
| C. | \[P{{H}_{3}}\] is equally basic as \[N{{H}_{3}}\] |
| D. | \[P{{H}_{3}}\] is amphoteric while \[N{{H}_{3}}\] is basic |
| Answer» C. \[P{{H}_{3}}\] is equally basic as \[N{{H}_{3}}\] | |
| 3380. |
When aluminium phosphide is treated with dil. sulphuric acid [KCET 1989] |
| A. | \[S{{O}_{2}}\] is liberated |
| B. | \[P{{H}_{3}}\] is evolved |
| C. | \[{{H}_{2}}S\] is evolved |
| D. | \[{{H}_{2}}\] is evolved |
| Answer» C. \[{{H}_{2}}S\] is evolved | |
| 3381. |
Phosphine is produced by adding water to [KCET 1991] |
| A. | \[Ca{{C}_{2}}\] |
| B. | \[HP{{O}_{3}}\] |
| C. | \[C{{a}_{3}}{{P}_{2}}\] |
| D. | \[{{P}_{4}}{{O}_{10}}\] |
| Answer» D. \[{{P}_{4}}{{O}_{10}}\] | |
| 3382. |
Ammonium nitrate decomposes on heating into [NCERT 1974,75; CPMT 1973, 78, 88, 94; AMU 1984] |
| A. | Ammonia and nitric acid |
| B. | Nitrous oxide and water |
| C. | Nitrogen, hydrogen and ozone |
| D. | Nitric oxide, nitrogen dioxide and hydrogen |
| Answer» C. Nitrogen, hydrogen and ozone | |
| 3383. |
\[P{{H}_{4}}I+NaOH\] forms [CBSE PMT 1991] |
| A. | \[P{{H}_{3}}\] |
| B. | \[N{{H}_{3}}\] |
| C. | \[{{P}_{4}}{{O}_{6}}\] |
| D. | \[{{P}_{4}}{{O}_{10}}\] |
| Answer» B. \[N{{H}_{3}}\] | |
| 3384. |
Phosphine is not obtained by the reaction [MP PMT 1989] |
| A. | White P is heated with \[NaOH\] |
| B. | Red P is heated with \[NaOH\] |
| C. | \[C{{a}_{3}}{{P}_{2}}\] reacts with water |
| D. | Phosphorus trioxide is boiled with water |
| Answer» C. \[C{{a}_{3}}{{P}_{2}}\] reacts with water | |
| 3385. |
In modern process phosphorus is manufactured by [CPMT 1974, 78, 81] |
| A. | Heating a mixture of phosphorite mineral with sand and coke in electric furnace |
| B. | Heating calcium phosphate with coke |
| C. | Heating bone ash with coke |
| D. | Heating the phosphate mineral with sand |
| Answer» B. Heating calcium phosphate with coke | |
| 3386. |
White phosphorus when boiled with strong solution of caustic soda produces [CPMT 1989,03] |
| A. | Phosphine |
| B. | Phosphoric acid |
| C. | Phosphorus acid |
| D. | No reaction |
| Answer» B. Phosphoric acid | |
| 3387. |
Mixture used for the tips of match stick is [DPMT 1984] |
| A. | \[S+K\] |
| B. | \[S{{b}_{2}}{{S}_{3}}\] |
| C. | \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}+S+\]red P |
| D. | \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}+K+S\] |
| Answer» D. \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}+K+S\] | |
| 3388. |
Which of the following properties of white phosphorus are shared by red phosphorus [NCERT 1973, 74] |
| A. | It shows phosphorescenes in air |
| B. | It reacts with hot aqueous \[NaOH\] to give phosphine |
| C. | It dissolves in carbon disulphide |
| D. | It burns when heated in air |
| Answer» E. | |
| 3389. |
Bones glow in the dark because [EAMCET 1980] |
| A. | They contain shining material |
| B. | They contain red phosphorus |
| C. | White phosphorus undergoes slow combustion in contact with air |
| D. | White phosphorus changes into red form |
| Answer» D. White phosphorus changes into red form | |
| 3390. |
Which of the following phosphorus is most stable [AFMC 1992] |
| A. | Red |
| B. | White |
| C. | Black |
| D. | All stable |
| Answer» B. White | |
| 3391. |
Red phosphorus can be obtained from white phosphorus by [KCET 1989] |
| A. | Heating it with a catalyst in an inert atmosphere |
| B. | Distilling it in an inert atmosphere |
| C. | Dissolving it in carbon disulphide and crystallizing |
| D. | Melting it and pouring the liquid into water |
| Answer» B. Distilling it in an inert atmosphere | |
| 3392. |
Phosphide ion has the electronic structure similar to that of [CPMT 1988] |
| A. | Nitride ion |
| B. | Fluoride ion |
| C. | Sodium ion |
| D. | Chloride ion |
| Answer» E. | |
| 3393. |
White phosphorus \[\left( {{P}_{4}} \right)\] has [IIT 1998] |
| A. | Six P - P single bonds |
| B. | Four P - P single bonds |
| C. | Four lone pairs of electrons |
| D. | PPP angle of \[{{60}^{o}}\] |
| Answer» B. Four P - P single bonds | |
| 3394. |
\[PC{{l}_{5}}\] exists but \[NC{{l}_{5}}\] does not because [EAMCET 1977, 82] |
| A. | Nitrogen has no vacant orbitals |
| B. | \[NC{{l}_{5}}\] is unstable |
| C. | Nitrogen atom is much smaller |
| D. | Nitrogen is highly inert |
| Answer» B. \[NC{{l}_{5}}\] is unstable | |
| 3395. |
A hydride of nitrogen which is acidic is [NCERT 1978, 80; CPMT 1980; BHU 1986] |
| A. | \[N{{H}_{3}}\] |
| B. | \[{{N}_{2}}{{H}_{4}}\] |
| C. | \[{{N}_{2}}{{H}_{2}}\] |
| D. | \[{{N}_{3}}H\] |
| Answer» E. | |
| 3396. |
Nitrogen is essential constituent of all [MP PMT 1990] |
| A. | Proteins |
| B. | Fats |
| C. | Proteins and fats |
| D. | None of these |
| Answer» B. Fats | |
| 3397. |
Ammonia gas can be collected by the displacement of [NCERT 1989, 90] |
| A. | Conc. \[{{H}_{2}}S{{O}_{4}}\] |
| B. | Brine |
| C. | Water |
| D. | Mercury |
| Answer» E. | |
| 3398. |
A mixture of ammonia and air at about \[{{800}^{o}}C\] in the presence of Pt gauze forms [Pb. CET 1989] |
| A. | \[{{N}_{2}}O\] |
| B. | \[NO\] |
| C. | \[N{{H}_{2}}OH\] |
| D. | \[{{N}_{2}}{{O}_{3}}\] |
| Answer» C. \[N{{H}_{2}}OH\] | |
| 3399. |
Concentrated nitric acid oxidises cane sugar to [CBSE PMT 1991] |
| A. | \[C{{O}_{2}}\] and \[{{H}_{2}}O\] |
| B. | \[CO\] and \[{{H}_{2}}O\] |
| C. | \[CO,\] \[C{{O}_{2}}\] and \[{{H}_{2}}O\] |
| D. | Oxalic acid and water |
| Answer» E. | |
| 3400. |
Nitrogen dioxide [KCET 1989] |
| A. | Dissolves in water forming nitric acid |
| B. | Does not dissolve in water |
| C. | Dissolves in water to form nitrous acid and gives off oxygen |
| D. | Dissolves in water to form a mixture of nitrous and nitric acids |
| Answer» E. | |