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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.
| 4801. |
When rain is accompained by a thunderstorm, the collected rain water will have a pH value [AIEEE 2003] |
| A. | Slightly lower than that of rain water without thunderstorm |
| B. | Slightly higher than that when the thunderstorm is not there |
| C. | Uninfluenced by occurrence of thunderstorm |
| D. | Which depends on the amount of dust in air |
| Answer» B. Slightly higher than that when the thunderstorm is not there | |
| 4802. |
\[pH\]values of \[HCl\] and \[NaOH\] solutions each of strength \[\frac{N}{100}\] will be respectively [MP PMT 1999] |
| A. | 2 and 2 |
| B. | 2 and 12 |
| C. | 12 and 2 |
| D. | 2 and 10 |
| Answer» C. 12 and 2 | |
| 4803. |
For preparing a buffer solution of \[pH\]6 by mixing sodium acetate and acetic acid, the ratio of the concentration of salt and acid should be\[({{K}_{a}}={{10}^{-5}})\] [MP PET 1997] |
| A. | \[1\,\,:\,\,10\] |
| B. | \[10\,\,:\,\,1\] |
| C. | \[100\,\,:\,\,1\] |
| D. | \[1\,\,:\,\,100\] |
| Answer» C. \[100\,\,:\,\,1\] | |
| 4804. |
Which is incorrect for buffer solution [CPMT 1985] |
| A. | It contains weak acid and its conjugate base |
| B. | It contains weak base and its conjugate acid |
| C. | In this there is very less change is \[pH\] value when very less amount of acid and base is mixed |
| D. | None of the above |
| Answer» E. | |
| 4805. |
pH value of a solution, whose hydronium ion concentration is \[6.2\times {{10}^{-9}}mol/\,l,\] is [AFMC 1999; AIIMS 2000] |
| A. | 6.21 |
| B. | 7.21 |
| C. | 7.75 |
| D. | 8.21 |
| Answer» E. | |
| 4806. |
The compound whose 0.1 M solution is basic is [IIT 1986; MP PMT 1991] |
| A. | Ammonium acetate |
| B. | Calcium carbonate |
| C. | Ammonium sulphate |
| D. | Sodium acetate |
| Answer» E. | |
| 4807. |
A is an aqueous acid; B is an aqueous base. They are diluted separately, then [KCET 2002] |
| A. | \[pH\] of A increases and \[pH\] of B decreases |
| B. | \[pH\] of A increases and \[pH\] of B decreases till \[pH\] in each case is 7 |
| C. | \[pH\] of A and B increase |
| D. | \[pH\] of B and A decrease |
| Answer» B. \[pH\] of A increases and \[pH\] of B decreases till \[pH\] in each case is 7 | |
| 4808. |
Given pH of a solution A is 3 and it is mixed with another solution B having pH 2. If both mixed then resultant pH of the solution will be [BHU 2005] |
| A. | 3.2 |
| B. | 1.9 |
| C. | 3.4 |
| D. | 3.5 |
| Answer» C. 3.4 | |
| 4809. |
On adding solid potassium cyanide to water [MP PMT 1989] |
| A. | pH will increase |
| B. | pH will decrease |
| C. | pH will not change |
| D. | Electrical conductance will not change |
| Answer» B. pH will decrease | |
| 4810. |
Which one has \[pH\] 12 [Roorkee 1995] |
| A. | \[0.01\,M\,\,KOH\] |
| B. | \[1\,N\,\,KOH\,\,ml\] |
| C. | \[1\,N\,NaOH\,\,ml\] |
| D. | \[3.0\times {{10}^{-7}}\,M\] |
| Answer» B. \[1\,N\,\,KOH\,\,ml\] | |
| 4811. |
Which of the following 0.1M solution will contain the largest concentration of hydronium ions [NCERT 1971, 73] |
| A. | \[NaHC{{O}_{3}}\] |
| B. | \[N{{H}_{4}}Cl\] |
| C. | \[HCl\] |
| D. | \[N{{H}_{3}}\] |
| Answer» D. \[N{{H}_{3}}\] | |
| 4812. |
\[pH+pOH\]equal to [NCERT 1975] |
| A. | Zero |
| B. | Fourteen |
| C. | A negative number |
| D. | Infinity |
| Answer» C. A negative number | |
| 4813. |
The \[pH\]of an aqueous solution having hydroxide ion concentration as \[1\times {{10}^{-5}}\] is [MP PMT 1991] |
| A. | 5 |
| B. | 9 |
| C. | 4.5 |
| D. | 11 |
| Answer» C. 4.5 | |
| 4814. |
The \[pH\]value of \[0.1\,\,M\,\,HCl\]is approximately 1. What will be the approximate \[pH\]value of 0.05 \[M\,\,{{H}_{2}}S{{O}_{4}}\] [MP PMT 1991] |
| A. | 0.05 |
| B. | 0.5 |
| C. | 1 |
| D. | 2 |
| Answer» D. 2 | |
| 4815. |
Which one of the following statements is not true [AIEEE 2003] |
| A. | The conjugate base of \[{{H}_{2}}PO_{4}^{-}\] is \[HPO_{4}^{2-}\] |
| B. | \[pH+pOH=14\] for all aqueous solutions |
| C. | The \[pH\] of \[1\times {{10}^{-8}}M\,HCl\] is 8 |
| D. | 96,500 coulombs of electricity when passed through a \[CuS{{O}_{4}}\] solution deposits 1 gram equivalent of copper at the cathode |
| Answer» D. 96,500 coulombs of electricity when passed through a \[CuS{{O}_{4}}\] solution deposits 1 gram equivalent of copper at the cathode | |
| 4816. |
Which of the following will not function as a buffer solution [Roorkee 2000] |
| A. | \[NaCl\] and \[NaOH\] |
| B. | \[NaOH\] and \[N{{H}_{4}}OH\] |
| C. | \[C{{H}_{3}}COON{{H}_{4}}\] and \[HCl\] |
| D. | Borax and boric acid |
| Answer» B. \[NaOH\] and \[N{{H}_{4}}OH\] | |
| 4817. |
Assuming complete dissociation, which of the following aqueous solutions will have the same \[pH\]value [Roorkee Qualifying 1998] |
| A. | \[N{{H}_{3}}\] of \[0.01\,\,M\,\,HCl\] |
| B. | \[_{10}\frac{1}{{{K}_{a}}}\] of \[0.01\,\,M\,\,{{H}_{2}}S{{O}_{4}}\] |
| C. | \[50\,\,ml\] of \[_{10}\frac{1}{{{K}_{a}}}\] |
| D. | Mixture of 50 \[ml\] of \[0.02\,\,M\,\,{{H}_{2}}S{{O}_{4}}\] and \[50\,\,ml\] of \[0.02\,\,M\,\,NaOH\] |
| Answer» B. \[_{10}\frac{1}{{{K}_{a}}}\] of \[0.01\,\,M\,\,{{H}_{2}}S{{O}_{4}}\] | |
| 4818. |
The \[pH\] of a \[{{10}^{-9}}M\] solution of \[HCl\] in water is [UPSEAT 2000, 02] |
| A. | 8 |
| B. | ? 8 |
| C. | Between 7 and 8 |
| D. | Between 6 and 7 |
| Answer» E. | |
| 4819. |
The \[pH\] of a \[0.001\,M\,NaOH\] will be [MP PMT 1995; UPSEAT 2001] |
| A. | 3 |
| B. | 2 |
| C. | 11 |
| D. | 12 |
| Answer» D. 12 | |
| 4820. |
A \[pH\] of 7 signifies [CPMT 1974; DPMT 1982] |
| A. | Pure water |
| B. | Neutral solution |
| C. | Basic solution |
| D. | Acidic solution |
| Answer» B. Neutral solution | |
| 4821. |
An aqueous solution of sodium carbnate has a pH greater than 7 becaue [DCE 2003] |
| A. | It contains more carbonate ions than \[{{H}_{2}}O\] molecules |
| B. | Contains more hydroxide ions than carbonate ions |
| C. | \[N{{a}^{+}}\]ions react with water |
| D. | Carbonate ions react with \[{{H}_{2}}O\] |
| Answer» C. \[N{{a}^{+}}\]ions react with water | |
| 4822. |
The rapid change of pH near the stoichiometric point of an acid-base titration is the basis of indicator detection. pH of the solution is related to ratio of the concentrations of the conjugate acid (HIn) and base \[(I{{n}^{-}})\]forms of the indicator by the expression [CBSE PMT 2004] |
| A. | \[\log \frac{[HIn]}{[I{{n}^{-}}]}=pH-p{{K}_{In}}\] |
| B. | \[\log \frac{[I{{n}^{-}}]}{[HIn]}=pH-p{{K}_{In}}\] |
| C. | \[\log \frac{[I{{n}^{-}}]}{[HIn]}=p{{K}_{In}}-pH\] |
| D. | \[\log \frac{[HIn]}{[I{{n}^{-}}]}=p{{K}_{In}}-pH\] |
| Answer» C. \[\log \frac{[I{{n}^{-}}]}{[HIn]}=p{{K}_{In}}-pH\] | |
| 4823. |
In a mixing of acetic acid and sodium acetate the ratio of concentration of the salts to the acid is increased ten times. Then the pH of the solution [KCET 2004] |
| A. | Increase by one |
| B. | Decreases by one |
| C. | Decrease ten fold |
| D. | Increases ten fold |
| Answer» B. Decreases by one | |
| 4824. |
What will be the \[pH\]value of 0.05 M \[Ba{{(OH)}_{2}}\]solution [CPMT 2004] |
| A. | 12 |
| B. | 13 |
| C. | 1 |
| D. | 12.96 |
| Answer» C. 1 | |
| 4825. |
Which of the following is a Lewis base [CPMT 2004] |
| A. | NaOH |
| B. | \[N{{H}_{3}}\] |
| C. | \[BC{{l}_{3}}\] |
| D. | All of these |
| Answer» C. \[BC{{l}_{3}}\] | |
| 4826. |
Buffer solution is prepared by mixing [MH CET 2003] |
| A. | Strong acid + its salt of strong base |
| B. | Weak acid + its salt of weak base |
| C. | Strong acid + its salt of weak base |
| D. | Weak acid + its salt of strong base |
| Answer» E. | |
| 4827. |
\[pH\]scale was introduced by [UPSEAT 2004] |
| A. | Arrhenius |
| B. | Sorensen |
| C. | Lewis |
| D. | Lowry |
| Answer» C. Lewis | |
| 4828. |
pH of a solution is 9.5. The solution is [MH CET 2000] |
| A. | Neutral |
| B. | Acidic |
| C. | Basic |
| D. | Amphoteric |
| Answer» D. Amphoteric | |
| 4829. |
Equivalent weight of an acid [UPSEAT 2004] |
| A. | Depends on the reaction involved |
| B. | Depends upon the number of oxygen atoms present |
| C. | Is always same |
| D. | None of the above |
| Answer» B. Depends upon the number of oxygen atoms present | |
| 4830. |
\[Ka\]of \[{{H}_{2}}{{O}_{2}}\]is of the order of [DCE 2004] |
| A. | \[{{10}^{-12}}\] |
| B. | \[{{10}^{-14}}\] |
| C. | \[{{10}^{-16}}\] |
| D. | \[{{10}^{-10}}\] |
| Answer» B. \[{{10}^{-14}}\] | |
| 4831. |
A solution of weak acids is diluted by adding an equal volume of water. Which of the following will not change [JIPMER 1997] |
| A. | Strength of the acid |
| B. | The value of \[[{{H}_{3}}{{O}^{+}}]\] |
| C. | \[pH\]of the solution |
| D. | The degree of dissociation of acid |
| Answer» C. \[pH\]of the solution | |
| 4832. |
The concentration of hydrogen ion \[[{{H}^{+}}]\] in 0.01 M \[HCl\] is [EAMCET 1979] |
| A. | \[{{10}^{12}}\] |
| B. | \[{{10}^{-2}}\] |
| C. | \[{{10}^{-1}}\] |
| D. | \[{{10}^{-12}}\] |
| Answer» C. \[{{10}^{-1}}\] | |
| 4833. |
The pH of normal KOH is [MP PET 1990] |
| A. | 1 |
| B. | 0 |
| C. | 14 |
| D. | 7 |
| Answer» D. 7 | |
| 4834. |
The \[pH\] of an aqueous solution containing \[[{{H}^{+}}]=3\times {{10}^{-3}}M\] is [MP PET 2001,04] |
| A. | 2.471 |
| B. | 2.523 |
| C. | 3.0 |
| D. | ? 3 |
| Answer» C. 3.0 | |
| 4835. |
\[{{H}_{4}}{{O}^{+}}\]of a solution is 4. The hydroxide ion concentration of the solution would be [NCERT 1981; CBSE PMT 1991; MP PMT 1994] |
| A. | \[{{10}^{-4}}\] |
| B. | \[{{10}^{-10}}\] |
| C. | \[{{10}^{-2}}\] |
| D. | \[{{10}^{-12}}\] |
| Answer» C. \[{{10}^{-2}}\] | |
| 4836. |
A weak monoprotic acid of 0.1 M, ionizes to 1% in solution. What will be the pH of solution [MNR 1988] |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 11 |
| Answer» D. 11 | |
| 4837. |
The hydrogen ion concentration of 0.001 \[M\,\,NaOH\] solution is [AFMC 1983] |
| A. | \[1\times {{10}^{-2}}mole/litre\] |
| B. | \[1\times {{10}^{-11}}mole/litre\] |
| C. | \[1\times {{10}^{-14}}mole/litre\] |
| D. | \[1\times {{10}^{-12}}mole/litre\] |
| Answer» C. \[1\times {{10}^{-14}}mole/litre\] | |
| 4838. |
Which will have maximum \[pH\] [NCERT 1979] |
| A. | Distilled water |
| B. | \[1\,M\,\,N{{H}_{3}}\] |
| C. | \[1\,M\,\,NaOH\] |
| D. | Water saturated by chlorine |
| Answer» D. Water saturated by chlorine | |
| 4839. |
50 \[ml\] of \[2\,N\]acetic acid mixed with \[10\,ml\] of \[1\,\,N\]sodium acetate solution will have an approximate \[pH\] of [MP PMT/PET 1988] |
| A. | 4 |
| B. | 5 |
| C. | 6 |
| D. | 7 |
| Answer» B. 5 | |
| 4840. |
Assuming complete dissociation, the \[pH\] of a 0.01 M \[NaOH\]solution is equal to [NCERT 1975; CPMT 1977; DPMT 1982; BHU 1997] |
| A. | 2.0 |
| B. | 14.0 |
| C. | 12.0 |
| D. | 0.01 |
| Answer» D. 0.01 | |
| 4841. |
What will be hydrogen ion concentration in moles \[litr{{e}^{-1}}\] of a solution, whose \[pH\] is 4.58 [UPSEAT 2001] |
| A. | \[2.63\times {{10}^{-5}}\] |
| B. | \[3.0\times {{10}^{-5}}\] |
| C. | \[4.68\] |
| D. | None of these |
| Answer» B. \[3.0\times {{10}^{-5}}\] | |
| 4842. |
Which is not a buffer solution [CPMT 1990] |
| A. | \[N{{H}_{4}}Cl+N{{H}_{4}}OH\] |
| B. | \[C{{H}_{3}}COOH+C{{H}_{3}}COONa\] |
| C. | \[C{{H}_{3}}COON{{H}_{4}}\] |
| D. | Borax + Boric acid |
| Answer» D. Borax + Boric acid | |
| 4843. |
The solution of \[N{{a}_{2}}C{{O}_{3}}\] has \[pH\] [AMU 1988] |
| A. | Greater than 7 |
| B. | Less than 7 |
| C. | Equal to 7 |
| D. | Equal to zero |
| Answer» B. Less than 7 | |
| 4844. |
The one which has the highest value of \[pH\]is |
| A. | Distilled water |
| B. | \[N{{H}_{3}}\]Solution in water |
| C. | \[N{{H}_{3}}\] |
| D. | Water saturated with \[C{{l}_{2}}\] |
| Answer» C. \[N{{H}_{3}}\] | |
| 4845. |
Addition of which chemical will decrease the hydrogen ion concentration of an acetic acid solution [MP PMT 1990] |
| A. | \[N{{H}_{4}}Cl\] |
| B. | \[A{{l}_{2}}{{(S{{O}_{4}})}_{3}}\] |
| C. | \[AgN{{O}_{3}}\] |
| D. | \[HCN\] |
| Answer» E. | |
| 4846. |
The gastric juice in our stomach contains enough \[HCl\] to make the hydrogen ion concentration about \[0.01\,\,mole/litre.\] The \[pH\]of gastric juice is [NCERT 1974] |
| A. | 0.01 |
| B. | 1 |
| C. | 2 |
| D. | 14 |
| Answer» D. 14 | |
| 4847. |
The \[pH\] of \[1\,\,N\,\,{{H}_{2}}O\] is [CPMT 1988] |
| A. | 7 |
| B. | >7 |
| C. | <7 |
| D. | 0 |
| Answer» B. >7 | |
| 4848. |
The \[pH\] of a \[{{10}^{-10}}M\,NaOH\] solution is nearest to [UPSEAT 2001, 02] |
| A. | 10 |
| B. | 7 |
| C. | 4 |
| D. | \[-10\] |
| Answer» C. 4 | |
| 4849. |
\[pH\]of a 10 \[M\] solution of \[HCl\] is [CBSE PMT 1995] |
| A. | Less than 0 |
| B. | 2 |
| C. | 0 |
| D. | 1 |
| Answer» D. 1 | |
| 4850. |
The \[p{{K}_{a}}\] of acetylsalicylic acid (aspirin) is 3.5. The \[pH\] of gastric juice in human stomach is about 2-3 and the \[pH\] in the small intestine is about 8. Aspirin will be [IIT 1988; KCET 2003] |
| A. | Unionized in the small intestine and in the stomach |
| B. | Completely ionized in the small intestine and in the stomach |
| C. | Ionized in the stomach and almost unionized in the small intestine |
| D. | Ionized in the small intestine and almost unionized in the stomach |
| Answer» E. | |