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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.
| 4001. |
The number of molecules in \[16gm\] of methane is [MP PET/PMT 1998] |
| A. | \[3.0\times {{10}^{23}}\] |
| B. | \[6.02\times {{10}^{23}}\] |
| C. | \[\frac{16}{6.02}\times {{10}^{23}}\] |
| D. | \[\frac{16}{3.0}\times {{10}^{23}}\] |
| Answer» C. \[\frac{16}{6.02}\times {{10}^{23}}\] | |
| 4002. |
The molality of a solution is [MP PMT 1996] |
| A. | Number of moles of solute per \[1000\,ml\] of the solvent |
| B. | Number of moles of solute per \[1000\,gm\]of the solvent |
| C. | Number of moles of solute per \[1000\,ml\] of the solution |
| D. | Number of gram equivalents of solute per \[1000\,ml\] of the solution |
| Answer» C. Number of moles of solute per \[1000\,ml\] of the solution | |
| 4003. |
3.0 molal NaOH solution has a density of 1.110 g/ml. The molarity of the solution is [BVP 2003] |
| A. | 3.0504 |
| B. | 3.64 |
| C. | 3.05 |
| D. | 2.9732 |
| Answer» E. | |
| 4004. |
What will be the normality of a solution containing 4.9 g. \[{{H}_{3}}P{{O}_{4}}\] dissolved in 500 ml water [MP PMT 2003] |
| A. | 0.3 |
| B. | 1.0 |
| C. | 3.0 |
| D. | 0.1 |
| Answer» B. 1.0 | |
| 4005. |
36g water and 828g ethyl alcohol form an ideal solution. The mole fraction of water in it, is [MP PMT 2003] |
| A. | 1.0 |
| B. | 0.7 |
| C. | 0.4 |
| D. | 0.1 |
| Answer» E. | |
| 4006. |
2.0 molar solution is obtained , when 0.5 mole solute is dissolved in [MP PMT 2003] |
| A. | 250 ml solvent |
| B. | 250 g solvent |
| C. | 250 ml solution |
| D. | 1000 ml solvent |
| Answer» D. 1000 ml solvent | |
| 4007. |
Dilute one litre 1 molar \[{{H}_{2}}S{{O}_{4}}\] solution by 5 litre water, the normality of that solution is [DPMT 1983] |
| A. | \[0.2N\] |
| B. | \[5\,N\] |
| C. | \[10\,N\] |
| D. | 0.33 N |
| Answer» E. | |
| 4008. |
25ml of a solution of barium hydroxide on titration with a 0.1molar solution of hydrochloric acid gave a litre value of 35 ml. The molarity of barium hydroxide solution was [AIEEE 2003] |
| A. | 0.07 |
| B. | 0.14 |
| C. | 0.28 |
| D. | 0.35 |
| Answer» B. 0.14 | |
| 4009. |
The amount of \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] (eq. wt. 49.04) required to prepare 100 ml of its 0.05 N solution is [JIPMER 2002] |
| A. | 2.9424 g |
| B. | 0.4904 g |
| C. | 1.4712 g |
| D. | 0.2452 g |
| Answer» E. | |
| 4010. |
5 ml of N HCl, 20 ml of N/2 \[{{H}_{2}}S{{O}_{4}}\] and 30 ml of N/3 HNO3 are mixed together and volume made to one litre. The normally of the resulting solution is [Kerala CET (Med.) 2003] |
| A. | \[\frac{N}{5}\] |
| B. | \[\frac{N}{10}\] |
| C. | \[\frac{N}{20}\] |
| D. | \[\frac{N}{40}\] |
| E. | \[\frac{N}{25}\] |
| Answer» E. \[\frac{N}{25}\] | |
| 4011. |
Which statement is true for solution of 0.020 M \[{{H}_{2}}S{{O}_{4}}\] [DPMT 2001] |
| A. | 2 litre of the solution contains 0.020 mole of \[SO_{4}^{2-}\] |
| B. | 2 litre of the solution contains 0.080 mole of \[{{H}_{3}}{{O}^{+}}\] |
| C. | 1 litre of the solution contains 0.020 mole \[{{H}_{3}}{{O}^{+}}\] |
| D. | None of these |
| Answer» C. 1 litre of the solution contains 0.020 mole \[{{H}_{3}}{{O}^{+}}\] | |
| 4012. |
10 litre solution of urea contains 240g urea. The active mass of urea will be [KCET 2000] |
| A. | 0.04 |
| B. | 0.02 |
| C. | 0.4 |
| D. | 0.2 |
| Answer» D. 0.2 | |
| 4013. |
The volumes of \[4\,N\,HCl\] and \[10\,N\,HCl\] required to make 1 litre of \[6\,N\,HCl\] are [Kerala PMT 2004] |
| A. | 0.75 litre of 10 N HCl and 0.25 litre of 4 N HCl |
| B. | 0.25 litre of 4 N HCl and 0.75 litre of 10 N HCl |
| C. | 0.67 litre of 4 N HCl and 0.33 litre of 10 N HCl |
| D. | 0.80 litre of 4 N HCl and 0.20 litre of 10 N HCl |
| E. | 0.50 litre of 4 N HCl and 0.50 litre of 10 N HCl |
| Answer» D. 0.80 litre of 4 N HCl and 0.20 litre of 10 N HCl | |
| 4014. |
171 g of cane sugar \[({{C}_{12}}{{H}_{22}}{{O}_{11}})\] is dissolved in 1 litre of water. The molarity of the solution is [MP PMT 2001] |
| A. | 2.0 M |
| B. | 1.0 M |
| C. | 0.5 M |
| D. | 0.25 M |
| Answer» D. 0.25 M | |
| 4015. |
The molarity of a solution made by mixing 50ml of conc. \[{{H}_{2}}S{{O}_{4}}\] (36N) with 50 ml of water is [MP PMT 2001] |
| A. | 36 M |
| B. | 18 M |
| C. | 9 M |
| D. | 6 M |
| Answer» D. 6 M | |
| 4016. |
The amount of anhydrous \[N{{a}_{2}}C{{O}_{3}}\] present in 250 ml of 0.25 M solution is [DPMT 2001] |
| A. | 6.225 g |
| B. | 66.25 g |
| C. | 6.0 g |
| D. | 6.625 g |
| Answer» E. | |
| 4017. |
The normality of 2.3 M \[{{H}_{2}}S{{O}_{4}}\] solution is [KCET 2000] |
| A. | 2.3 N |
| B. | 4.6 N |
| C. | 0.46 N |
| D. | 0.23 N |
| Answer» C. 0.46 N | |
| 4018. |
When the concentration is expressed as the number of moles of a solute per litre of solution it known as [Kerala CET (Med.) 2002] |
| A. | Normality |
| B. | Molarity |
| C. | Mole fraction |
| D. | Mass percentage |
| E. | Molality |
| Answer» C. Mole fraction | |
| 4019. |
When a solute is present in trace quantities the following expression is used [Kerala CET (Med.) 2002] |
| A. | Gram per million |
| B. | Milligram percent |
| C. | Microgram percent |
| D. | Nano gram percent |
| E. | Parts per million |
| Answer» F. | |
| 4020. |
If 1 M and 2.5 litre NaOH solution is mixed with another 0.5 M and 3 litre NaOH solution, then molarity of the resultant solution will be [CBSE PMT 2002] |
| A. | 1.0 M |
| B. | 0.73 M |
| C. | 0.80 M |
| D. | 0.50 M |
| Answer» C. 0.80 M | |
| 4021. |
The number of molecules in 4.25 g of ammonia is approximately [CBSE PMT 2002] |
| A. | \[0.5\times {{10}^{23}}\] |
| B. | \[1.5\times {{10}^{23}}\] |
| C. | \[3.5\times {{10}^{23}}\] |
| D. | \[2.5\times {{10}^{23}}\] |
| Answer» C. \[3.5\times {{10}^{23}}\] | |
| 4022. |
The largest number of molecules is in [Kurukshetra CEE 1998] |
| A. | \[25g\] of \[C{{O}_{2}}\] |
| B. | \[46g\] of \[{{C}_{2}}{{H}_{5}}OH\] |
| C. | \[36g\] of \[{{H}_{2}}O\] |
| D. | \[54g\] of \[{{N}_{2}}{{O}_{5}}\] |
| Answer» D. \[54g\] of \[{{N}_{2}}{{O}_{5}}\] | |
| 4023. |
A solution contains 1 mole of water and 4 mole of ethanol. The mole fraction of water and ethanol will be |
| A. | 0.2 water + 0.8 ethanol |
| B. | 0.4 water + 0.6 ethanol |
| C. | 0.6 water + 0.8 ethanol |
| D. | 0.8 water + 0.2 ethanol |
| Answer» B. 0.4 water + 0.6 ethanol | |
| 4024. |
The number of moles of \[KCl\] in \[1000\,ml\] of 3 molar solution is [NCERT 1973] |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 1.5 |
| Answer» D. 1.5 | |
| 4025. |
If 18 gm of glucose \[({{C}_{6}}{{H}_{12}}{{O}_{6}})\] is present in 1000 gm of an aqueous solution of glucose, it is said to be [CPMT 1986] |
| A. | 1 molal |
| B. | 1.1 molal |
| C. | 0.5 molal |
| D. | 0.1 molal |
| Answer» E. | |
| 4026. |
A mixture has 18g water and 414g ethanol. The mole fraction of water in mixture is (assume ideal behaviour of the mixture) [MP PMT 2000] |
| A. | 0.1 |
| B. | 0.4 |
| C. | 0.7 |
| D. | 0.9 |
| Answer» B. 0.4 | |
| 4027. |
What weight of ferrous ammonium sulphate is needed to prepare 100 ml of 0.1 normal solution (mol. wt. 392) [CPMT 1983] |
| A. | 39.2 gm |
| B. | 3.92 gm |
| C. | 1.96 gm |
| D. | 19.6 gm |
| Answer» C. 1.96 gm | |
| 4028. |
A molal solution is one that contains one mole of a solute in [NCERT 1983; DPMT 1983; CPMT 1985; IIT 1986; MP PMT 1987; EAMCET 1990; MP PET 1994, 99] |
| A. | 1000 gm of the solvent |
| B. | One litre of the solvent |
| C. | One litre of the solution |
| D. | 22.4 litres of the solution |
| Answer» B. One litre of the solvent | |
| 4029. |
When 90 gm of water is mixed with 300 gm of acetic acid. The total number of moles will be |
| A. | 5 |
| B. | 10 |
| C. | 15 |
| D. | 20 |
| Answer» C. 15 | |
| 4030. |
4.0 gm of \[NaOH\] are contained in one decilitre of solution. Its molarity would be |
| A. | 4 M |
| B. | 2 M |
| C. | 1 M |
| D. | 1.5 M |
| Answer» D. 1.5 M | |
| 4031. |
The amount of \[NaOH\] in gms in \[250\,c{{m}^{3}}\] of a \[0.100\,M\,NaOH\] solution would be |
| A. | 4 gm |
| B. | 2 gm |
| C. | 1 gm |
| D. | 2.5 gm |
| Answer» D. 2.5 gm | |
| 4032. |
What is the volume of \[0.1\,N\,HCl\] required to react completely with \[1.0g\] of pure calcium carbonate \[(Ca=40,\,C=12\] and \[O=16)\] [KCET 1998] |
| A. | \[150\,c{{m}^{3}}\] |
| B. | \[250\,c{{m}^{3}}\] |
| C. | \[200\,c{{m}^{3}}\] |
| D. | \[100\,c{{m}^{3}}\] |
| Answer» D. \[100\,c{{m}^{3}}\] | |
| 4033. |
If we take \[44g\] of \[C{{O}_{2}}\] and \[14g\] of \[{{N}_{2}}\] what will be mole fraction of \[C{{O}_{2}}\] in the mixture [KCET 1990] |
| A. | 1/5 |
| B. | 1/3 |
| C. | 2/3 |
| D. | ¼ |
| Answer» D. ¼ | |
| 4034. |
How many moles of water are present in 180 \[g\] of water [JIPMER 1991; DPMT 1982; Manipal MEE 1995] |
| A. | 1 mole |
| B. | 18 mole |
| C. | 10 mole |
| D. | 100 mole |
| Answer» D. 100 mole | |
| 4035. |
The molarity of a \[0.2\,N\,N{{a}_{2}}C{{O}_{3}}\] solution will be [MP PMT 1987; Pb. CET 2004] |
| A. | 0.05 M |
| B. | 0.2 M |
| C. | 0.1 M |
| D. | 0.4 M |
| Answer» D. 0.4 M | |
| 4036. |
The molarity of pure water is [CPMT 1974, 88, 90; CMC Vellore 1991; RPET 1999; NCERT 1974, 76; MP PMT 1999; AMU 2002] |
| A. | 55.6 |
| B. | 5.56 |
| C. | 100 |
| D. | 18 |
| Answer» B. 5.56 | |
| 4037. |
If 5.85 g of NaCl (molecular weight 58.5) is dissolved in water and the solution is made up to 0.5 litre, the molarity of the solution will be [AMU 1999; Pb PMT 2000; AFMC 2001] |
| A. | 0.2 |
| B. | 0.4 |
| C. | 1.0 |
| D. | 0.1 |
| Answer» B. 0.4 | |
| 4038. |
How much water is needed to dilute 10 ml of 10 N hydrochloric acid to make it exactly decinormal (0.1 N) [EAMCET 1982] |
| A. | 990 ml |
| B. | 1000 ml |
| C. | 1010 ml |
| D. | 100 ml |
| Answer» B. 1000 ml | |
| 4039. |
Addition of conc. HCl to saturated \[BaC{{l}_{2}}\] solution precipitates \[BaC{{l}_{2}}\]; because [AMU 2000] |
| A. | It follows from Le Chatelier?s principle |
| B. | Of common-ion effect |
| C. | Ionic product \[(B{{a}^{++}}),\]\[(C{{l}^{-}})\]remains constant in a saturated solution |
| D. | At constant temperature, the product \[(B{{a}^{2+}}),\] \[{{(C{{l}^{-}})}^{2}}\] remains constant in a saturated solution |
| Answer» D. At constant temperature, the product \[(B{{a}^{2+}}),\] \[{{(C{{l}^{-}})}^{2}}\] remains constant in a saturated solution | |
| 4040. |
Molarity of a solution prepared by dissolving 75.5 g of pure KOH in 540 ml solution is [BHU 1999] |
| A. | 3.05 M |
| B. | 1.35 M |
| C. | 2.50 M |
| D. | 4.50 M |
| Answer» D. 4.50 M | |
| 4041. |
\[200ml\] of a solution contains \[5.85\,g\] dissolved sodium chloride. The concentration of the solution will be \[(Na=23;\,Cl=35.5)\] [MP PMT 1999] |
| A. | 1 molar |
| B. | 2 molar |
| C. | 0.5 molar |
| D. | 0.25 molar |
| Answer» D. 0.25 molar | |
| 4042. |
The weight of sodium carbonate required to prepare 500 ml of a semi- normal solution is [JIPMER 1999] |
| A. | 13.25 g |
| B. | 26.5 g |
| C. | 53 g |
| D. | 6.125 g |
| Answer» B. 26.5 g | |
| 4043. |
The molar solution of sulphuric acid is equal to [MP PET 1999] |
| A. | \[N\]solution |
| B. | \[2N\]solution |
| C. | \[N/2\] solution |
| D. | \[3N\]solution |
| Answer» C. \[N/2\] solution | |
| 4044. |
Molecular weight of urea is 60. A solution of urea containing \[6g\] urea in one litre is [BHU 1996, 99] |
| A. | 1 molar |
| B. | 1.5 molar |
| C. | 0.1 molar |
| D. | 0.01 molar |
| Answer» D. 0.01 molar | |
| 4045. |
An \[X\] molal solution of a compound in benzene has mole fraction of solute equal to 0.2. The value of \[X\] is [KCET 1996; DCE 2001] |
| A. | 14 |
| B. | 3.2 |
| C. | 4 |
| D. | 2 |
| Answer» C. 4 | |
| 4046. |
If 0.50 mol of \[CaC{{l}_{2}}\] is mixed with 0.20 mol of \[N{{a}_{3}}P{{O}_{4}}\], the maximum number of moles of \[C{{a}_{3}}{{(P{{O}_{4}})}_{2}}\] which can be formed, is [Pb. PMT 1998] |
| A. | 0.70 |
| B. | 0.50 |
| C. | 0.20 |
| D. | 0.10 |
| Answer» E. | |
| 4047. |
How much of NaOH is required to neutralise 1500 \[c{{m}^{3}}\] of 0.1 N HCl (At. wt. of Na =23) [KCET 2001] |
| A. | 4 g |
| B. | 6 g |
| C. | 40 g |
| D. | 60 g |
| Answer» C. 40 g | |
| 4048. |
A certain aqueous solution of \[FeC{{l}_{3}}\] (formula mass =162) has a density of \[1.1\,g/ml\] and contains \[20.0%\,FeC{{l}_{3}}\]. Molar concentration of this solution is [Pb. PMT 1998] |
| A. | 0.028 |
| B. | 0.163 |
| C. | 1.27 |
| D. | 1.47 |
| Answer» D. 1.47 | |
| 4049. |
What is the molarity of \[{{H}_{2}}S{{O}_{4}}\] solution, that has a density 1.84 gm/cc at \[{{35}^{o}}C\] and contains solute 98% by weight [AIIMS 2001] |
| A. | (a] 4.18 M |
| B. | 8.14 M |
| C. | 18.4 M |
| D. | 18 M |
| Answer» D. 18 M | |
| 4050. |
In a mixture of 1 gm \[{{H}_{2}}\] and 8 gm \[{{O}_{2}}\], the mole fraction of hydrogen is [Orissa JEE 2002] |
| A. | 0.667 |
| B. | 0.5 |
| C. | 0.33 |
| D. | None of these |
| Answer» B. 0.5 | |