MCQOPTIONS
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MCQOPTIONS
This section includes 2539 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 401. |
Knocking sound occurs in engine when fuel………. |
| A. | Ignites slowly |
| B. | Ignites rapidly |
| C. | Contains water |
| D. | Is mixed with machine oil |
| Answer» C. Contains water | |
| 402. |
Which of the following products is formed when benzaldehyde is treated with CH3 MgBr and theaddition product so obtained is subjected to acid hydrolysis. |
| A. | Secondary alcohol |
| B. | A primary alcohol |
| C. | Phenol |
| D. | Tert-Butyl alcohol |
| Answer» B. A primary alcohol | |
| 403. |
Pick out the alkane which differs from the other members of the group. |
| A. | 2,2-dimethyl propane |
| B. | Pentane |
| C. | 2-methyl butane |
| D. | 2,2-dimethyl butane |
| Answer» E. | |
| 404. |
Which of the following has the highest boiling point……….. |
| A. | Neopentane |
| B. | n-butane |
| C. | n-heptane |
| D. | Isobutane |
| Answer» D. Isobutane | |
| 405. |
The tetrahedral nature of carbon was first given by…………. |
| A. | Kekule |
| B. | Le Bell and Van't Hoff |
| C. | Pauling |
| D. | Armstrong and Bayer |
| Answer» C. Pauling | |
| 406. |
Anhydrous sodium acetate on heating with sodalime gives…………. |
| A. | Acetic acid |
| B. | Methane |
| C. | Calcium acetate |
| D. | Ethane |
| Answer» C. Calcium acetate | |
| 407. |
Grignard reagent on reaction with acetone forms……… |
| A. | Tertiary alcohol |
| B. | Secondary alcohol |
| C. | Acetic acid |
| D. | Acetaldehyde |
| Answer» B. Secondary alcohol | |
| 408. |
Cyclohexane, a hydrocarbon floats on water because………… |
| A. | It is immiscible with water |
| B. | Its density is low as compared to water |
| C. | It is non-polar substance |
| D. | It is immiscible and lighter than water |
| Answer» B. Its density is low as compared to water | |
| 409. |
Ethanol is prepared industrially by……… |
| A. | Hydration of ethylene |
| B. | Fermentation of sugars |
| C. | Both the above |
| D. | None of these |
| Answer» D. None of these | |
| 410. |
The most important method of preparation of hydrocarbons of lower carbon number is…………. |
| A. | Pyrolysis of higher carbon number hydrocarbons |
| B. | Electrolysis of salts of fatty acids |
| C. | Sabatier and Senderen's reaction |
| D. | Direct synthesis |
| Answer» B. Electrolysis of salts of fatty acids | |
| 411. |
Coconut oil upon alkaline hydrolysis gives……. |
| A. | Glycol |
| B. | Alcohol |
| C. | Glycerol |
| D. | Ethylene oxide |
| Answer» D. Ethylene oxide | |
| 412. |
Which of the following is most soluble in water…… |
| A. | Normal butyl alcohol |
| B. | Isobutyl alcohol |
| C. | Tertiary butyl alcohol |
| D. | Secondary butyl alcohol |
| Answer» D. Secondary butyl alcohol | |
| 413. |
Boiling point of alcohol is comparatively higher than that corresponding alkane due to……. |
| A. | Intermolecular hydrogen bonding |
| B. | Intramolecular hydrogen bonding |
| C. | Volatile nature |
| D. | None of these |
| Answer» B. Intramolecular hydrogen bonding | |
| 414. |
IUPAC name of CHO CCl3 is………….. |
| A. | Chloral |
| B. | Trichloro acetaldehyde |
| C. | 1, 1, 1-trichloroethanal |
| D. | 2, 2, 2-trichloroethanal |
| Answer» E. | |
| 415. |
The addition of HCN to carbonyl compounds is an example of ………. |
| A. | Nucleophilic substitution |
| B. | Electrophilic addition |
| C. | Nucleophilic addition |
| D. | Electrophilic substitution |
| Answer» D. Electrophilic substitution | |
| 416. |
Benzaldehyde can be prepared by oxidation of toluene by …………. |
| A. | Acidic KMnO4 |
| B. | K2Cr2 O7 |
| C. | CrO2Cl2 |
| D. | All of these |
| Answer» D. All of these | |
| 417. |
Cannizzaro reaction is given by………… |
| A. | HCHO |
| B. | CH3COCH3CH |
| C. | CH3CHO |
| D. | CH3CH2OH |
| Answer» B. CH3COCH3CH | |
| 418. |
Which of the following compound has maximum boiling point…….. |
| A. | n-hexane |
| B. | n-pentane |
| C. | 2, 2-dimethyl propane |
| D. | 2-methyl butane |
| Answer» B. n-pentane | |
| 419. |
Methyl alcohol can be distinguished from ethyl alcohol using …… |
| A. | Fehling solution |
| B. | Schiff's reagent |
| C. | Sodium hydroxide and iodine |
| D. | Phthalein fusion test |
| Answer» D. Phthalein fusion test | |
| 420. |
In the dichlorination reaction of propane, mixture of products are obtained. How many isomers,the mixture contains………… |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 421. |
Photochemical chlorination of alkane is initiated by a process of…………… |
| A. | Pyrolysis |
| B. | Substitution |
| C. | Cracking |
| D. | Homolysis |
| Answer» E. | |
| 422. |
Benzyl alcohol and sodium benzoate is obtained by the action of sodium hydroxide on benzaldehyde.This reaction is known as …………… |
| A. | Perkin’s reaction |
| B. | Cannizzaro’s reaction |
| C. | Sandmeyer’s reaction |
| D. | Claisen condensation |
| Answer» C. Sandmeyer’s reaction | |
| 423. |
Dehydration of ethanol gives…… |
| A. | Acetic acid |
| B. | Ethane |
| C. | Ethylene |
| D. | Acetylene |
| Answer» D. Acetylene | |
| 424. |
The characteristic grouping of secondary alcohols is……. |
| A. | CHOH |
| B. | COH |
| C. | CH2OH |
| D. | COHOH |
| Answer» B. COH | |
| 425. |
Propionic acid is subjected to reduction with hydroiodic acid in the presence of a little P, the product formed is………… |
| A. | Ethane |
| B. | Propane |
| C. | Butane |
| D. | None of these |
| Answer» C. Butane | |
| 426. |
Which one of the following compounds does not give addition reactions……………… |
| A. | Aldehydes |
| B. | Alkanes |
| C. | Alkenes |
| D. | Alkynes |
| Answer» C. Alkenes | |
| 427. |
The shape of methane molecule is……….. |
| A. | Linear |
| B. | Trigonal planar |
| C. | Square planar |
| D. | Tetrahedral |
| Answer» E. | |
| 428. |
Pentanol is a…….. |
| A. | Primary alcohol |
| B. | Secondary alcohol |
| C. | Tertiary alcohol |
| D. | None of these |
| Answer» D. None of these | |
| 429. |
The -OH group of methyl alcohol cannot be replaced by chlorine by the action of…… |
| A. | Chlorine |
| B. | Hydrogen chloride |
| C. | Phosphorus trichloride |
| D. | Phosphorus pentachloride |
| Answer» B. Hydrogen chloride | |
| 430. |
By means of calcium chloride which of following can be dried…… |
| A. | Methanol |
| B. | Ethanol |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» E. | |
| 431. |
Acid catalyzed hydration of alkenes except ethene leads to the formation of …… |
| A. | Primary alcohol |
| B. | Secondary or tertiary alcohol |
| C. | Mixture of primary and secondary alcohols |
| D. | Mixture of secondary and tertiary alcohols |
| Answer» C. Mixture of primary and secondary alcohols | |
| 432. |
When a mixture of methane and oxygen is passed through heated molybdenum oxide, the mainproduct formed is……….. |
| A. | Methanoic acid |
| B. | Ethanal |
| C. | Methanol |
| D. | Methanal |
| Answer» E. | |
| 433. |
Which group is present on alcohol. |
| A. | OH |
| B. | C=O |
| C. | CHO |
| D. | NO2 |
| Answer» B. C=O | |
| 434. |
Which of the following types of isomerism is shown by Pentanone. |
| A. | Chain isomerism |
| B. | Position isomerism |
| C. | Functional isomerism |
| D. | All of these |
| Answer» E. | |
| 435. |
Which of the following statements is not true for ethane…………. |
| A. | It can be chlorinated with chlorine |
| B. | It can be catalytically hydrogenated |
| C. | When oxidised produces CO2 and H2O |
| D. | It is a homologue of iso-butane |
| Answer» C. When oxidised produces CO2 and H2O | |
| 436. |
In HMG-CoA-Reductase Inhibitors, Lactone ring may be substituted at |
| A. | C- 15 |
| B. | C- 16 |
| C. | C-17 |
| D. | C -18 |
| Answer» D. C -18 | |
| 437. |
The physical half life of radioactive 131I is: |
| A. | 8 hours |
| B. | 8 days |
| C. | 16 days |
| D. | 60 days |
| Answer» C. 16 days | |
| 438. |
Methyldopa differs from clonidine in the following respect: |
| A. | It is less likely to cause rebound hypertension on sudden discontinuation |
| B. | It does not reduce plasma renin activity |
| C. | It has a central as well as peripheral site of antihypertensive action |
| D. | It does not produce central side effects |
| Answer» B. It does not reduce plasma renin activity | |
| 439. |
Which of the following drugs is most likely to accentuate varient (Prinzmetal) angina? |
| A. | Propranolol |
| B. | Atenolol |
| C. | Verapamil |
| D. | Dipyridamole |
| Answer» B. Atenolol | |
| 440. |
Beneficial effect/effects of diuretics in CHF patients include the following: |
| A. | Symptomatic relief |
| B. | Regression of pathological changes |
| C. | Prolongation of life expectancy |
| D. | Both ‘A’ and ‘C’ |
| Answer» B. Regression of pathological changes | |
| 441. |
Identify high ceiling diuretic. |
| A. | Chlorthiazide |
| B. | Furosemide |
| C. | Spironolactone |
| D. | Amiloride |
| Answer» C. Spironolactone | |
| 442. |
Select the most appropriate hypolipidemic drug for a patient with raised LDL-cholesterol level butnormal triglyceride level: |
| A. | A HMG-CoA reductase inhibitor |
| B. | A fibric acid derivative |
| C. | Gugulipid |
| D. | Nicotinic acid |
| Answer» B. A fibric acid derivative | |
| 443. |
Thiazide diuretics and furosemide have directionally opposite effect on the net renal excretion ofthe following substance: |
| A. | Uric acid |
| B. | Calcium |
| C. | Magnesium |
| D. | Bicarbonate |
| Answer» C. Magnesium | |
| 444. |
Trapping of iodide by the following organ/organs is enhanced by thyrotropin: |
| A. | Thyroid |
| B. | Salivary gland |
| C. | Placenta |
| D. | All of the above |
| Answer» B. Salivary gland | |
| 445. |
Which of the following is a potassium retaining diuretic: |
| A. | Triamterene |
| B. | Trimethoprim |
| C. | Tizanidine |
| D. | Trimetazidine |
| Answer» B. Trimethoprim | |
| 446. |
Plasma expanders are used in the following conditions except: (Note: They will increase circulating blood volume and thus preload on heart, which will worsen heart failure.) |
| A. | Congestive heart failure |
| B. | Extensive burns |
| C. | Mutilating injuries |
| D. | Endotoxin shock |
| Answer» B. Extensive burns | |
| 447. |
The following is true of procainamide except: |
| A. | It generates an active metabolite in the body |
| B. | Its plasma half-life is longer than that of quinidine |
| C. | On long-term use, it can cause systemic lupus erythematosus like illness |
| D. | It is effective in many cases of ventricular extrasystoles, not responding to lignocaine |
| Answer» C. On long-term use, it can cause systemic lupus erythematosus like illness | |
| 448. |
Choose the correct statement about osmotic diuretics: |
| A. | They are large molecular weight substances which form colloidal solution |
| B. | Their primary site of action is collecting ducts in the kidney |
| C. | They increase water excretion without increasing salt excretion |
| D. | They can lower intraocular pressure |
| Answer» E. | |
| 449. |
Though nitrates and calcium channel blockers are both vasodilators, they are used concurrentlyin angina pectoris, because: |
| A. | They antagonise each other’s side effects |
| B. | Nitrates primarily reduce preload while calcium channel blockers primarily reduce after-load |
| C. | Nitrates increase coronary flow while calcium channel blockers reduce cardiac work |
| D. | Both ‘B’ and ‘C’ are correct |
| Answer» C. Nitrates increase coronary flow while calcium channel blockers reduce cardiac work | |
| 450. |
Which of the following drugs is a potassium channel opener? |
| A. | Nicorandil |
| B. | Hydralazine |
| C. | Glibenclamide |
| D. | Amiloride |
| Answer» B. Hydralazine | |