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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.
| 3951. |
The number of moles of \[S{{O}_{2}}C{{l}_{2}}\] in \[13.5gm\] is [CPMT 1994] |
| A. | 0.1 |
| B. | 0.2 |
| C. | 0.3 |
| D. | 0.4 |
| Answer» B. 0.2 | |
| 3952. |
In a solution of \[7.8\,gm\] benzene \[{{C}_{6}}{{H}_{6}}\] and \[46.0\,gm\] toluene \[({{C}_{6}}{{H}_{5}}C{{H}_{3}})\], the mole fraction of benzene in this solution is [BHU 1981, 87] |
| A. | \[1/6\] |
| B. | \[1/5\] |
| C. | \[1/2\] |
| D. | \[1/3\] |
| Answer» B. \[1/5\] | |
| 3953. |
The weight of \[{{H}_{2}}{{C}_{2}}{{O}_{4}}.\,2{{H}_{2}}O\] required to prepare \[500ml\] of \[0.2N\] solution is [EAMCET 1991] |
| A. | \[126g\] |
| B. | \[12.6g\] |
| C. | \[63g\] |
| D. | \[6.3g\] |
| Answer» E. | |
| 3954. |
Which of the following has maximum number of molecules [CBSE PMT 2002] |
| A. | 16 gm of \[{{O}_{2}}\] |
| B. | 16 gm of \[N{{O}_{2}}\] |
| C. | 7 gm of \[{{N}_{2}}\] |
| D. | 2 gm of \[{{H}_{2}}\] |
| Answer» E. | |
| 3955. |
When \[1.80gm\] glucose dissolve in \[90\,gm\] of \[{{H}_{2}}O\], the mole fraction of glucose is [AFMC 2000] |
| A. | 0.00399 |
| B. | 0.00199 |
| C. | 0.0199 |
| D. | 0.998 |
| Answer» C. 0.0199 | |
| 3956. |
The concentration of an aqueous solution of \[0.01M\,C{{H}_{3}}OH\] solution is very nearly equal to which of the following [BITS 1992] |
| A. | \[0.01%\,C{{H}_{3}}OH\] |
| B. | \[0.01m\,C{{H}_{3}}OH\] |
| C. | \[{{x}_{C{{H}_{3}}OH}}=0.01\] |
| D. | \[0.99M\,{{H}_{2}}O\] |
| E. | \[0.01N\,C{{H}_{3}}OH\] |
| Answer» F. | |
| 3957. |
3.65 gms of HCl is dissolved in 16.2 gms of water. The mole fraction of HCl in the resulting solution is [EAMCET 2003] |
| A. | 0.4 |
| B. | 0.3 |
| C. | 0.2 |
| D. | 0.1 |
| Answer» E. | |
| 3958. |
1000 gms aqueous solution of \[CaC{{O}_{3}}\] contains 10 gms of carbonate. Concentration of the solution is [CPMT 1985] |
| A. | 10 ppm |
| B. | 100 ppm |
| C. | 1000 ppm |
| D. | 10000 ppm |
| Answer» E. | |
| 3959. |
Increasing the temperature of an aqueous solution will cause [IIT Screening 1993] |
| A. | Decrease in molality |
| B. | Decrease in molarity |
| C. | Decrease in mole fraction |
| D. | Decrease in % w/w |
| Answer» C. Decrease in mole fraction | |
| 3960. |
The sum of the mole fraction of the components of a solution is |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 4 |
| Answer» C. 2 | |
| 3961. |
Volume of water needed to mix with 10 ml 10N \[HN{{O}_{3}}\] to get 0.1 N \[HN{{O}_{3}}\] [UPSEAT 2003] |
| A. | 1000 ml |
| B. | 990 ml |
| C. | 1010 ml |
| D. | 10 ml |
| Answer» C. 1010 ml | |
| 3962. |
What is the molality of a solution which contains 18 g of glucose \[({{C}_{6}}{{H}_{12}}{{O}_{6}})\] in 250 g of water [UPSEAT 2001] |
| A. | 4.0 m |
| B. | 0.4 m |
| C. | 4.2 m |
| D. | 0.8 m |
| Answer» C. 4.2 m | |
| 3963. |
Calculate the molality of 1 litre solution of 93% \[{{H}_{2}}S{{O}_{4}}\](weight/volume). The density of the solution is 1.84 g /ml [UPSEAT 2000] |
| A. | 10.43 |
| B. | 20.36 |
| C. | 12.05 |
| D. | 14.05 |
| Answer» E. | |
| 3964. |
The normality of \[0.3M\] phosphorus acid \[({{H}_{3}}P{{O}_{3}})\] is [IIT 1999; AIIMS 2000] |
| A. | 0.1 |
| B. | 0.9 |
| C. | 0.3 |
| D. | 0.6 |
| Answer» E. | |
| 3965. |
The molality of 90% \[{{H}_{2}}S{{O}_{4}}\] solution is [density=1.8 gm/ml] [MP PMT 2004] |
| A. | 1.8 |
| B. | 48.4 |
| C. | 9.18 |
| D. | 94.6 |
| Answer» D. 94.6 | |
| 3966. |
If 25 ml of 0.25 M NaCl solution is diluted with water to a volume of 500ml the new concentration of the solution is [UPSEAT 2000, 01] |
| A. | 0.167 M |
| B. | 0.0125 M |
| C. | 0.833 M |
| D. | 0.0167 M |
| Answer» C. 0.833 M | |
| 3967. |
The volume of water to be added to \[100c{{m}^{3}}\] of 0.5 N \[{{H}_{2}}S{{O}_{4}}\] to get decinormal concentration is [KCET (Engg.) 2001] |
| A. | 400 \[c{{m}^{3}}\] |
| B. | 500 \[c{{m}^{3}}\] |
| C. | 450 \[c{{m}^{3}}\] |
| D. | 100 \[c{{m}^{3}}\] |
| Answer» B. 500 \[c{{m}^{3}}\] | |
| 3968. |
If one mole of a substance is present in \[1\,kg\] of solvent, then [CPMT 1996] |
| A. | It shows molar concentration |
| B. | It shows molal concentration |
| C. | It shows normality |
| D. | It shows strength \[gm/gm\] |
| Answer» C. It shows normality | |
| 3969. |
0.5 M of \[{{H}_{2}}S{{O}_{4}}\] is diluted from 1 litre to 10 litre, normality of resulting solution is [AFMC 2005] |
| A. | 1 N |
| B. | 0.1 N |
| C. | 10 N |
| D. | 11 N |
| Answer» C. 10 N | |
| 3970. |
Molecular weight of glucose is 180. A solution of glucose which contains 18 gms per litre is [AFMC 1978] |
| A. | 2 molal |
| B. | 1 molal |
| C. | 0.1 molal |
| D. | 18 molal |
| Answer» D. 18 molal | |
| 3971. |
The number of moles of solute per kg of a solvent is called its [DPMT 1983; IIT 1985; CPMT 1999] |
| A. | Molarity |
| B. | Normality |
| C. | Molar fraction |
| D. | Molality |
| Answer» E. | |
| 3972. |
1.0 gm of pure calcium carbonate was found to require 50 ml of dilute \[HCl\]for complete reaction. The strength of the \[HCl\] solution is given by [CPMT 1986] |
| A. | 4 N |
| B. | 2 N |
| C. | 0.4 N |
| D. | 0.2 N |
| Answer» D. 0.2 N | |
| 3973. |
On passing \[{{H}_{2}}S\] gas through a solution of \[C{{u}^{+}}\] and \[Z{{n}^{+2}}\] ions, CuS is precipitated first because [AMU 2001] |
| A. | Solubility product of CuS is equal to the ionic product of ZnS |
| B. | Solubility product of CuS is equal to the solubility product of ZnS |
| C. | Solubility product of CuS is lower than the solubility product of ZnS |
| D. | Solubility product of CuS is greater than the solubility product of ZnS |
| Answer» E. | |
| 3974. |
What will be the molarity of a solution containing \[5g\] of sodium hydroxide in \[250\,ml\] solution [MP PET 1999; BHU 1999; KCET 1999; AIIMS 2000; Pb. CET 2000] |
| A. | 0.5 |
| B. | 1.0 |
| C. | 2.0 |
| D. | 0.1 |
| Answer» B. 1.0 | |
| 3975. |
The molarity of a solution of \[N{{a}_{2}}C{{O}_{3}}\] having \[10.6g/500ml\] of solution is [AFMC 1992; DCE 2000] |
| A. | \[0.2M\] |
| B. | \[2M\] |
| C. | \[20M\] |
| D. | \[0.02M\] |
| Answer» B. \[2M\] | |
| 3976. |
Which is heaviest [CBSE PMT 1991] |
| A. | 25 gm of mercury |
| B. | 2 moles of water |
| C. | 2 moles of carbon dioxide |
| D. | 4 gm atoms of oxygen |
| Answer» D. 4 gm atoms of oxygen | |
| 3977. |
The distribution law is applied for the distribution of basic acid between [UPSEAT 2001] |
| A. | Water and ethyl alcohol |
| B. | Water and amyl alcohol |
| C. | Water and sulphuric acid |
| D. | Water and liquor ammonia |
| Answer» D. Water and liquor ammonia | |
| 3978. |
Which of the following concentration factor is affected by change in temperature [DCE 2002] |
| A. | Molarity |
| B. | Molality |
| C. | Mole fraction |
| D. | Weight fraction |
| Answer» B. Molality | |
| 3979. |
The weight of pure \[NaOH\] required to prepare \[250c{{m}^{3}}\] of \[0.1N\] solution is [KCET 1991; Kerala PMT 2004] |
| A. | \[4g\] |
| B. | \[1g\] |
| C. | \[2g\] |
| D. | \[10g\] |
| Answer» C. \[2g\] | |
| 3980. |
How many grams of dibasic acid (mol. wt. 200) should be present in \[100ml\] of its aqueous solution to give decinormal strength [AIIMS 1992; CBSE PMT 1999; AFMC 1999; KCET 2000; CPMT 2001] |
| A. | \[1g\] |
| B. | \[2g\] |
| C. | \[10g\] |
| D. | \[20g\] |
| Answer» B. \[2g\] | |
| 3981. |
To prepare a solution of concentration of 0.03 g/ml of \[AgN{{O}_{3}}\], what amount of \[AgN{{O}_{3}}\] should be added in 60 ml of solution [AFMC 2005] |
| A. | 1.8 |
| B. | 0.8 |
| C. | 0.18 |
| D. | None of these |
| Answer» B. 0.8 | |
| 3982. |
How many \[gm\] of \[{{H}_{2}}S{{O}_{4}}\] is present in \[0.25gm\] mole of \[{{H}_{2}}S{{O}_{4}}\] [CPMT 1990] |
| A. | 24.5 |
| B. | 2.45 |
| C. | 0.25 |
| D. | 0.245 |
| Answer» B. 2.45 | |
| 3983. |
\[9.8g\] of \[{{H}_{2}}S{{O}_{4}}\] is present in 2 litres of a solution. The molarity of the solution is [EAMCET 1991; MP PMT 2002] |
| A. | \[0.1M\] |
| B. | \[0.05M\] |
| C. | \[0.2M\] |
| D. | \[0.01M\] |
| Answer» C. \[0.2M\] | |
| 3984. |
The volume strength of \[1.5\,N\,{{H}_{2}}{{O}_{2}}\] solution is [CBSE PMT 1997; BHU 2002] |
| A. | 4.8 |
| B. | 5.2 |
| C. | 8.8 |
| D. | 8.4 |
| Answer» E. | |
| 3985. |
The mole fraction of water in 20% aqueous solution of \[{{H}_{2}}{{O}_{2}}\] is [EAMCET 1993] |
| A. | \[\frac{77}{68}\] |
| B. | \[\frac{68}{77}\] |
| C. | \[\frac{20}{80}\] |
| D. | \[\frac{80}{20}\] |
| Answer» C. \[\frac{20}{80}\] | |
| 3986. |
Mole fraction \[(X)\] of any solution is equal to |
| A. | \[\frac{\text{No}\text{. of moles of solute}}{\text{Volume of solution in litre}}\] |
| B. | \[\frac{\text{No}\text{. of gram equivalent of solute}}{\text{Volume of solution in litre}}\] |
| C. | \[\frac{\text{No}\text{. of moles of solute}}{\text{Mass of solvent in kg}}\] |
| D. | \[\frac{\text{No}\text{. of moles of any constituent}}{\text{Total no}\text{. of moles of all constituents}}\] |
| Answer» E. | |
| 3987. |
Molarity of \[0.2N\,{{H}_{2}}S{{O}_{4}}\] is [KCET 2005] |
| A. | 0.2 |
| B. | 0.4 |
| C. | 0.6 |
| D. | 0.1 |
| Answer» E. | |
| 3988. |
10.6 grams of a substance of molecular weight 106 was dissolved in \[100ml\]. \[10ml\] of this solution was pipetted out into a \[1000ml\] flask and made up to the mark with distilled water. The molarity of the resulting solution is [EAMCET 1998] |
| A. | \[1.0M\] |
| B. | \[{{10}^{-2}}M\] |
| C. | \[{{10}^{-3}}M\] |
| D. | \[{{10}^{-4}}M\] |
| Answer» C. \[{{10}^{-3}}M\] | |
| 3989. |
The mole fraction of the solute in one molal aqueous solution is [CBSE PMT 2005] |
| A. | 0.027 |
| B. | 0.036 |
| C. | 0.018 |
| D. | 0.009 |
| Answer» D. 0.009 | |
| 3990. |
What volume of \[0.8\,M\] solution contains 0.1 mole of the solute [AFMC 1984] |
| A. | \[100\,ml\] |
| B. | \[125\,ml\] |
| C. | \[500\,ml\] |
| D. | \[62.5\,ml\] |
| Answer» C. \[500\,ml\] | |
| 3991. |
Conc. \[{{H}_{2}}S{{O}_{4}}\] has a density of 1.98 gm/ml and is 98% \[{{H}_{2}}S{{O}_{4}}\] by weight. Its normality is [MP PET 2002] |
| A. | 2 N |
| B. | 19.8 N |
| C. | 39.6 N |
| D. | 98 N |
| Answer» D. 98 N | |
| 3992. |
Which of the following solutions has the highest normality [JIPMER 1991] |
| A. | 8 gm of \[KOH\]/ litre |
| B. | \[N\] phosphoric acid |
| C. | 6 gm of \[NaOH\]/ 100 ml |
| D. | \[0.5M\,{{H}_{2}}S{{O}_{4}}\] |
| Answer» D. \[0.5M\,{{H}_{2}}S{{O}_{4}}\] | |
| 3993. |
Which of the following should be done in order to prepare \[0.40M\,NaCl\] starting with \[100\,ml\] of \[0.30M\,NaCl\] (mol.wt. of \[NaCl=58.5\]) [BIT 1992] |
| A. | Add \[0.585\,g\,NaCl\] |
| B. | Add \[20\,ml\] water |
| C. | Add \[0.010ml\,NaCl\] |
| D. | Evaporate \[10ml\] water |
| Answer» B. Add \[20\,ml\] water | |
| 3994. |
A solution of \[A{{l}_{2}}{{(S{{O}_{4}})}_{3}}\,\{d=1.253\,gm/ml\}\]contain 22% salt by weight. The molarity, normality and molality of the solution is [MP PET 2004] |
| A. | 0.805 M, 4.83 N, 0.825 M |
| B. | 0.825 M, 48.3 N, 0.805 M |
| C. | 4.83 M, 4.83 N, 4.83 M |
| D. | None |
| Answer» B. 0.825 M, 48.3 N, 0.805 M | |
| 3995. |
The normal amount of glucose in \[100ml\] of blood (8?12 hours after a meal) is [BHU 1981] |
| A. | \[8\,mg\] |
| B. | \[80\,mg\] |
| C. | \[200\,mg\] |
| D. | \[800\,mg\] |
| Answer» C. \[200\,mg\] | |
| 3996. |
Molar solution means 1 mole of solute present in [BCECE 2005] |
| A. | 1000g of solvent |
| B. | 1 litre of solvent |
| C. | 1 litre of solution |
| D. | 1000g of solution |
| Answer» D. 1000g of solution | |
| 3997. |
Two solutions of a substance (non electrolyte) are mixed in the following manner 480 ml of 1.5M first solution + 520 mL of 1.2M second solution. What is the molarity of the final mixture [AIEEE 2005] |
| A. | 1.20 M |
| B. | 1.50 M |
| C. | 1.344 M |
| D. | 2.70 M |
| Answer» D. 2.70 M | |
| 3998. |
The normality of a solution of sodium hydroxide 100 ml of which contains 4 grams of \[NaOH\] is [CMC Vellore 1991] |
| A. | 0.1 |
| B. | 40 |
| C. | 1.0 |
| D. | 0.4 |
| Answer» D. 0.4 | |
| 3999. |
If 5.85 gms of \[NaCl\] are dissolved in 90 gms of water, the mole fraction of \[NaCl\]is [CMC Vellore 1991; MP PMT 1994; AFMC 1998] |
| A. | 0.1 |
| B. | 0.2 |
| C. | 0.3 |
| D. | 0.01 |
| E. | 0.0196 |
| Answer» F. | |
| 4000. |
The number of moles of a solute in its solution is 20 and total number of moles are 80. The mole fraction of solute is [MP PMT 1997] |
| A. | 2.5 |
| B. | 0.25 |
| C. | 1 |
| D. | 0.75 |
| Answer» C. 1 | |