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.
| 2901. |
Oxidation number of \[Fe\]in \[{{K}_{3}}[Fe{{(CN)}_{6}}]\] is [AMU 1988] |
| A. | + 2 |
| B. | + 3 |
| C. | + 1 |
| D. | + 4 |
| Answer» C. + 1 | |
| 2902. |
The oxidation number of fluorine in \[{{F}_{2}}O\] is [CPMT 1982; BHU 1982; EAMCET 1986] |
| A. | - 1 |
| B. | 1 |
| C. | + 2 |
| D. | -2 |
| Answer» B. 1 | |
| 2903. |
The oxidation number of nickel in \[{{K}_{4}}[Ni{{(CN)}_{4}}]\] is [JIPMER 1999] |
| A. | - 2 |
| B. | -1 |
| C. | + 2 |
| D. | 0 |
| Answer» E. | |
| 2904. |
Identify the element which can have highest oxidation numbers [AIIMS 1996] |
| A. | \[N\] |
| B. | \[O\] |
| C. | \[Cl\] |
| D. | \[C\] |
| Answer» D. \[C\] | |
| 2905. |
The oxidation number of C in \[C{{O}_{2}}\]is [MP PET 2001] |
| A. | -2 |
| B. | 2 |
| C. | -4 |
| D. | 4 |
| Answer» E. | |
| 2906. |
When \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] is converted to \[{{K}_{2}}Cr{{O}_{4}},\] the change in the oxidation state of chromium is [NCERT 1981] |
| A. | 0 |
| B. | 6 |
| C. | 4 |
| D. | 3 |
| Answer» B. 6 | |
| 2907. |
In the series ethane, ethylene and acetylene, the \[C-H\] bond energy is [NCERT 1977] |
| A. | The same in all the three compounds |
| B. | Greatest in ethane |
| C. | Greatest in ethylene |
| D. | Greatest in acetylene |
| Answer» E. | |
| 2908. |
The double bond between the two carbon atoms in ethylene consists of [NCERT 1981; EAMCET 1979] |
| A. | Two sigma bonds at right angles to each other |
| B. | One sigma bond and one pi bond |
| C. | Two pi bonds at right angles to each other |
| D. | Two pi bonds at an angle of \[{{60}^{o}}\] to each other |
| Answer» C. Two pi bonds at right angles to each other | |
| 2909. |
\[\pi \]bond is formed [JIPMER 2002] |
| A. | By overlapping of atomic orbitals on the axis of nuclei |
| B. | By mutual sharing of pi electron |
| C. | By sidewise overlapping of half filled p-orbitals |
| D. | By overlapping of s-orbitals with p-orbitals |
| Answer» D. By overlapping of s-orbitals with p-orbitals | |
| 2910. |
Strongest bond is [DPMT 1990] |
| A. | \[C-C\] |
| B. | \[C=C\] |
| C. | \[C\equiv C\] |
| D. | All are equally strong |
| Answer» D. All are equally strong | |
| 2911. |
In a double bond connecting two atoms, there is a sharing of [CPMT 1977, 80, 81; NCERT 1975; Bihar MEE 1980; MP PET 1999] |
| A. | 2 electrons |
| B. | 1 electron |
| C. | 4 electrons |
| D. | All electrons |
| Answer» D. All electrons | |
| 2912. |
The number and type of bonds between two carbon atoms in calcium carbide are [AIEEE 2005] |
| A. | One sigma, one pi |
| B. | One sigma, two pi |
| C. | Two sigma, one pi |
| D. | Two singma, two pi |
| Answer» C. Two sigma, one pi | |
| 2913. |
Which type of overlapping results the formation of a \[\pi \]bond [DPMT 1981] |
| A. | Axial overlapping of \[s-s\] orbitals |
| B. | Lateral overlapping of \[p-p\]orbitals |
| C. | Axial overlapping of \[p-p\] orbitals |
| D. | Axial overlapping of \[s-p\] orbitals |
| Answer» C. Axial overlapping of \[p-p\] orbitals | |
| 2914. |
Number of sigma bonds in \[{{P}_{4}}{{O}_{10}}\] is [AIEEE 2002] |
| A. | 6 |
| B. | 7 |
| C. | 17 |
| D. | 16 |
| Answer» E. | |
| 2915. |
Number of bonds in \[S{{O}_{2}}\] [DCE 2001] |
| A. | Two s and two p |
| B. | Two s and one p |
| C. | Two s, two p and one lone pair |
| D. | None of these |
| Answer» D. None of these | |
| 2916. |
The bond in the formation of fluorine molecule will be [MP PMT 1987] |
| A. | Due to \[PC{{l}_{5}}\] overlapping |
| B. | Due to \[s-p\] overlapping |
| C. | Due to \[{{H}_{2}}{{O}_{2}}>{{O}_{3}}>{{O}_{2}}\] overlapping |
| D. | Due to hybridization |
| Answer» D. Due to hybridization | |
| 2917. |
In which of following there exists a \[p\pi -d\pi \] bonding [AFMC 2001] |
| A. | Diamond |
| B. | Graphite |
| C. | Dimethyl amine |
| D. | Trisilylamine |
| Answer» E. | |
| 2918. |
In \[{{N}_{2}}\]molecule, the atoms are bonded by [MP PET 1996; UPSEAT 2001] |
| A. | One s, Two p |
| B. | One s, One p |
| C. | Two s, One p |
| D. | Three s bonds |
| Answer» B. One s, One p | |
| 2919. |
The \[p-p\] orbital overlapping is present in the following molecule [MP PET 1994] |
| A. | Hydrogen |
| B. | Hydrogen bromide |
| C. | Hydrogen chloride |
| D. | Chlorine |
| Answer» E. | |
| 2920. |
Which of the following is not correct [CBSE PMT 1990] |
| A. | A sigma bond is weaker than \[\pi \]bond |
| B. | A sigma bond is stronger than \[\pi \]bond |
| C. | A double bond is stronger than a single bond |
| D. | A double bond is shorter than a single bond |
| Answer» B. A sigma bond is stronger than \[\pi \]bond | |
| 2921. |
The most acidic compound among the following is [MP PET 1993] |
| A. | \[C{{H}_{3}}C{{H}_{2}}OH\] |
| B. | \[{{C}_{6}}{{H}_{5}}OH\] |
| C. | \[C{{H}_{3}}COOH\] |
| D. | \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\] |
| Answer» D. \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\] | |
| 2922. |
The number of sigma and pi bonds in 1-butene-3-yne are [IIT 1989] |
| A. | 5 sigma and 5 pi |
| B. | 7 sigma and 3 pi |
| C. | 8 sigma and 2 pi |
| D. | 6 sigma and 4 pi |
| Answer» C. 8 sigma and 2 pi | |
| 2923. |
Triple bond in ethyne is formed from [MP PMT 1990; NCERT 1979; EAMCET 1978; AMU 1985; CPMT 1988; MADT Bihar 1982; MH CET 2000] |
| A. | Three sigma bonds |
| B. | Three pi bonds |
| C. | One sigma and two pi bonds |
| D. | Two sigma and one pi bond |
| Answer» D. Two sigma and one pi bond | |
| 2924. |
Semipermeable membrane is that which permits the passage of [BHU 1979; CPMT 1977, 84, 90; MP PMT 1994] |
| A. | Solute molecules only |
| B. | Solvent molecules only |
| C. | Solute and solvent molecules both |
| D. | Neither solute nor solvent molecules |
| Answer» C. Solute and solvent molecules both | |
| 2925. |
In osmosis [DPMT 1985] |
| A. | Solvent molecules move from higher concentration to lower concentration |
| B. | Solvent molecules move from lower to higher concentration |
| C. | Solute molecules move from higher to lower concentration |
| D. | Solute molecules move from lower to higher concentration |
| Answer» C. Solute molecules move from higher to lower concentration | |
| 2926. |
The relationship between osmotic pressure at \[273\,K\] when \[10g\] glucose \[({{P}_{1}}),\,10g\] urea \[({{P}_{2}})\] and \[10g\] sucrose \[({{P}_{3}})\] are dissolved in \[250ml\] of water is [CBSE PMT 1996] |
| A. | \[{{P}_{1}}>{{P}_{2}}>{{P}_{3}}\] |
| B. | \[{{P}_{3}}>{{P}_{1}}>{{P}_{2}}\] |
| C. | \[{{P}_{2}}>{{P}_{1}}>{{P}_{3}}\] |
| D. | \[{{P}_{2}}>{{P}_{3}}>{{P}_{1}}\] |
| Answer» D. \[{{P}_{2}}>{{P}_{3}}>{{P}_{1}}\] | |
| 2927. |
Which of the following aqueous solutions are isotonic \[(R=0.082\] atm \[{{K}^{-1}}mo{{l}^{-1}})\] [Roorkee Qualifying 1998] |
| A. | \[0.01\,M\] glucose |
| B. | \[0.01\,M\,NaN{{O}_{3}}\] |
| C. | \[500\,ml\] solution containing \[0.3\,g\] urea |
| D. | \[0.04\,N\,HCl\] |
| Answer» B. \[0.01\,M\,NaN{{O}_{3}}\] | |
| 2928. |
Which of the following aqueous solutions produce the same osmotic pressure [Roorkee 1999] |
| A. | 0.1 M NaCl solution |
| B. | 0.1 M glucose solution |
| C. | 0.6 g urea in 100 ml solution |
| D. | 1.0 g of a non-electrolyte solute (X) in 50 ml solution (Molar mass of X = 200) |
| Answer» C. 0.6 g urea in 100 ml solution | |
| 2929. |
A solution of urea contain 8.6 gm/litre (mol. wt. 60.0). It is isotonic with a 5% solution of a non-volatile solute. The molecular weight of the solute will be [MP PMT 1986] |
| A. | 348.9 |
| B. | 34.89 |
| C. | 3489 |
| D. | 861.2 |
| Answer» B. 34.89 | |
| 2930. |
As a result of osmosis the volume of solution [JIPMER 2000] |
| A. | Increases |
| B. | Decreases |
| C. | Remains constant |
| D. | Increases or decreases |
| Answer» E. | |
| 2931. |
In osmosis reaction, the volume of solution |
| A. | Decreases slowly |
| B. | Increases slowly |
| C. | Suddenly increases |
| D. | No change |
| Answer» C. Suddenly increases | |
| 2932. |
If osmotic pressure of a solution is \[2\,atm\] at \[273K\], then at \[546K\], the osmotic pressure is |
| A. | 0.5 atm |
| B. | 1 atm |
| C. | 2 atm |
| D. | 4 atm |
| Answer» E. | |
| 2933. |
If solubility of \[NaCl\] at \[{{20}^{o}}C\] is 35 \[gm\] per 100 gm of water. Then on adding 50 gm of \[NaCl\] to the same volume at same temperature the salt remains undissolved is |
| A. | 15 gm |
| B. | 20 gm |
| C. | 50 gm |
| D. | 35 gm |
| Answer» B. 20 gm | |
| 2934. |
If molecular weight of compound is increased then sensitivity is decreased in which of the following methods [DCE 2001] |
| A. | Elevation in boiling point |
| B. | Viscosity |
| C. | Osmosis |
| D. | Dialysis |
| Answer» E. | |
| 2935. |
Solvent molecules pass through the semipermeable membrane is called [CPMT 1983; MP PMT 1987; RPET 2000; DCE 2004] |
| A. | Electrolysis |
| B. | Electrophoresis |
| C. | Cataphoresis |
| D. | Osmosis |
| Answer» E. | |
| 2936. |
The solution containing \[4.0gm\] of a polyvinyl chloride polymer in 1 litre of dioxane was found to have an osmotic pressure \[6.0\times {{10}^{-4}}\] atmosphere at\[300K\], the value of R used is 0.082 litre atmosphere\[mol{{e}^{-1}}{{k}^{-1}}\]. The molecular mass of the polymer was found to be [NCERT 1978] |
| A. | \[3.0\times {{10}^{2}}\] |
| B. | \[1.6\times {{10}^{5}}\] |
| C. | \[5.6\times {{10}^{4}}\] |
| D. | \[6.4\times {{10}^{2}}\] |
| Answer» C. \[5.6\times {{10}^{4}}\] | |
| 2937. |
A solution contains non-volatile solute of molecular mass \[{{M}_{p}}\]. Which of the following can be used to calculate molecular mass of the solute in terms of osmotic pressure (m = Mass of solute, V = Volume of solution and p = Osmotic pressure) [CBSE PMT 2002] |
| A. | \[Mp=\left( \frac{m}{\pi } \right)\,VRT\]\[\] |
| B. | \[Mp=\left( \frac{m}{V} \right)\frac{RT}{\pi }\] |
| C. | \[Mp=\left( \frac{m}{V} \right)\frac{\pi }{RT}\] |
| D. | \[Mp=\left( \frac{m}{V} \right)\,\pi RT\] |
| Answer» C. \[Mp=\left( \frac{m}{V} \right)\frac{\pi }{RT}\] | |
| 2938. |
At constant temperature, the osmotic pressure of a solution [CPMT 1986] |
| A. | Directly proportional to the concentration |
| B. | Inversely proportional to the concentration |
| C. | Directly proportional to the square of the concentration |
| D. | Directly proportional to the square root of the concentration |
| Answer» B. Inversely proportional to the concentration | |
| 2939. |
If a \[0.1M\] solution of glucose (mol. wt. 180) and \[0.1\,\text{molar}\] solution of urea (mol. wt. 60) are placed on the two sides of a semipermeable membrane to equal heights, then it will be correct to say [CBSE PMT 1992] |
| A. | There will be no net movement across the membrane |
| B. | Glucose will flow across the membrane into urea solution |
| C. | Urea will flow across the membrane into glucose solution |
| D. | Water will flow from urea solution into glucose solution |
| Answer» B. Glucose will flow across the membrane into urea solution | |
| 2940. |
Osmotic pressure of a urea solution at \[{{10}^{o}}C\] is \[500\,\,mm.\] Osmotic pressure of the solution become 105.3 mm. When it is diluted and temperature raised to \[{{25}^{o}}C.\] The extent of dilution is [MP PET 2004] |
| A. | 6 Times |
| B. | 5 Times |
| C. | 7 Times |
| D. | 4 Times |
| Answer» C. 7 Times | |
| 2941. |
Two solutions of \[KN{{O}_{3}}\] and \[C{{H}_{3}}COOH\] are prepared separately. Molarity of both is \[0.1\,M\] and osmotic pressures are \[{{P}_{1}}\] and \[{{P}_{2}}\] respectively. The correct relationship between the osmotic pressures is [CPMT 1983, 84; Pb CET 2004] |
| A. | \[{{P}_{2}}>{{P}_{1}}\] |
| B. | \[{{P}_{1}}={{P}_{2}}\] |
| C. | \[{{P}_{1}}>{{P}_{2}}\] |
| D. | \[\frac{{{P}_{1}}}{{{P}_{1}}+{{P}_{2}}}=\frac{{{P}_{2}}}{{{P}_{1}}+{{P}_{2}}}\] |
| Answer» D. \[\frac{{{P}_{1}}}{{{P}_{1}}+{{P}_{2}}}=\frac{{{P}_{2}}}{{{P}_{1}}+{{P}_{2}}}\] | |
| 2942. |
Which of the following molecules would diffuse through a cell membrane [NCERT 1978] |
| A. | Fructose |
| B. | Glycogen |
| C. | Haemoglobin |
| D. | Catalase |
| Answer» B. Glycogen | |
| 2943. |
The osmotic pressure in atmospheres of 10% solution of canesugar at \[{{69}^{o}}C\] is [AFMC 1991] |
| A. | 724 |
| B. | 824 |
| C. | 8.21 |
| D. | 7.21 |
| Answer» D. 7.21 | |
| 2944. |
The osmotic pressure of a dilute solution is directly proportional to the [MP PMT 1987] |
| A. | Diffusion rate of the solute |
| B. | Ionic concentration |
| C. | Elevation of B.P. |
| D. | Flow of solvent from a concentrated to a dilute solution |
| Answer» C. Elevation of B.P. | |
| 2945. |
The osmotic pressure of a decinormal solution of \[BaC{{l}_{2}}\] in water is |
| A. | Inversely proportional to its celsius temperature |
| B. | Inversely proportional to its absolute temperature |
| C. | Directly proportional to its celsius temperature |
| D. | Directly proportional to its absolute temperature |
| Answer» E. | |
| 2946. |
At the same temperature, following solution will be isotonic [MP PMT 1985] |
| A. | 3.24 gm of sucrose per litre of water and 0.18 gm glucose per litre of water |
| B. | 3.42 gm of sucrose per litre and 0.18 gm glucose in 0.1 litre water |
| C. | 3.24 gm of sucrose per litre of water and 0.585 gm of sodium chloride per litre of water |
| D. | 3.42 gm of sucrose per litre of water and 1.17 gm of sodium chloride per litre of water |
| Answer» C. 3.24 gm of sucrose per litre of water and 0.585 gm of sodium chloride per litre of water | |
| 2947. |
Osmotic pressure of a solution containing 0.1 mole of solute per litre at \[273K\] is (in atm) [CPMT 1988] |
| A. | \[\frac{0.1}{1}\times 0.08205\times 273\] |
| B. | \[0.1\times 1\times 0.08205\times 273\] |
| C. | \[\frac{1}{0.1}\times 0.08205\times 273\] |
| D. | \[\frac{0.1}{1}\times \frac{273}{0.08205}\] |
| Answer» B. \[0.1\times 1\times 0.08205\times 273\] | |
| 2948. |
The molecular weight of \[NaCl\] determined by osmotic pressure method will be |
| A. | Same as theoritical value |
| B. | Higher than theoritical value |
| C. | Lower than theoritical value |
| D. | None of these |
| Answer» D. None of these | |
| 2949. |
Which one of the following would lose weight on exposure to atmosphere [NCERT 1975] |
| A. | Concentrated \[{{H}_{2}}S{{O}_{4}}\] |
| B. | Solid \[NaOH\] |
| C. | A saturated solution of \[C{{O}_{2}}\] |
| D. | Anhydrous sodium carbonate |
| Answer» D. Anhydrous sodium carbonate | |
| 2950. |
Solutions having the same osmotic pressure under a given set of conditions are known as [BHU 1979; EAMCET 1979; CPMT 1990; MP PMT 1999; AFMC 1999, 2001] |
| A. | Hypertonic |
| B. | Hypotonic |
| C. | Normal |
| D. | Isotonic |
| Answer» E. | |