MCQs
Total Questions : 99
| Page 9 of 10 pages
Answer: Option C. -> Alfred Bernhard Nobel
ALFRED BERNHARD NOBEL WAS A SWEDISH CHEMIST, ENGINEER, INVENTOR, BUSINESSMAN, AND PHILANTHROPIST. ATOMIC NUMBER 102 WAS NAMED AFTER HIM.
ALFRED BERNHARD NOBEL WAS A SWEDISH CHEMIST, ENGINEER, INVENTOR, BUSINESSMAN, AND PHILANTHROPIST. ATOMIC NUMBER 102 WAS NAMED AFTER HIM.
Answer: Option A. -> Proton
THE PRESENCE OF POSITIVELY CHARGED PARTICLES IN AN ATOM HAS BEEN PREDICTED BY GOLDSTEIN BASED ON THE ELECTRICAL NEUTRALITY OF AN ATOM. THE DISCOVERY OF PROTON BY GOLDSTEIN WAS DONE ON THE BASIS OF THE CATHODE RAY EXPERIMENT CONDUCTED BY USING A PERFORATED CATHODE.
THE PRESENCE OF POSITIVELY CHARGED PARTICLES IN AN ATOM HAS BEEN PREDICTED BY GOLDSTEIN BASED ON THE ELECTRICAL NEUTRALITY OF AN ATOM. THE DISCOVERY OF PROTON BY GOLDSTEIN WAS DONE ON THE BASIS OF THE CATHODE RAY EXPERIMENT CONDUCTED BY USING A PERFORATED CATHODE.
Answer: Option B. -> Carbon Dioxide
SCOTTISH PHYSICIAN JOSEPH BLACK IS ATTRIBUTED WITH THE DISCOVERY OF MAGNESIUM, LATENT HEAT, SPECIFIC HEAT, AND CARBON DIOXIDE. HE FOUND THAT LIMESTONE (CALCIUM CARBONATE) COULD BE HEATED OR TREATED WITH ACIDS TO YIELD A GAS HE CALLED “FIXED AIR.” THIS FIXED AIR WAS DENSER THAN AIR AND SUPPORTED NEITHER FLAME NOR ANIMAL LIFE. HE ALSO FOUND OUT THAT WHEN BUBBLED THROUGH LIMEWATER, IT WOULD PRECIPITATE CALCIUM CARBONATE. HE CONCLUDED THAT FIXED AIR IS PRODUCED BY ANIMAL RESPIRATION AND MICROBIAL FERMENTATION.
SCOTTISH PHYSICIAN JOSEPH BLACK IS ATTRIBUTED WITH THE DISCOVERY OF MAGNESIUM, LATENT HEAT, SPECIFIC HEAT, AND CARBON DIOXIDE. HE FOUND THAT LIMESTONE (CALCIUM CARBONATE) COULD BE HEATED OR TREATED WITH ACIDS TO YIELD A GAS HE CALLED “FIXED AIR.” THIS FIXED AIR WAS DENSER THAN AIR AND SUPPORTED NEITHER FLAME NOR ANIMAL LIFE. HE ALSO FOUND OUT THAT WHEN BUBBLED THROUGH LIMEWATER, IT WOULD PRECIPITATE CALCIUM CARBONATE. HE CONCLUDED THAT FIXED AIR IS PRODUCED BY ANIMAL RESPIRATION AND MICROBIAL FERMENTATION.
Answer: Option D. -> Michael Faraday
ALTHOUGH MICHAEL FARADAY (1791-1867) IS PRIMARILY KNOWN FOR HIS RESEARCH ON ELECTROMAGNETISM, HE MADE SIGNIFICANT CONTRIBUTIONS TO THE FIELD OF CHEMISTRY, INCLUDING DISCOVERING CHLORINE AND CARBON. FARADAY ALSO DISCOVERED BENZENE, CONTRIBUTED TO THE DEVELOPMENT OF ELECTROLYSIS, AND MADE MODERN CHEMISTRY LABS POSSIBLE BY INVENTING AN EARLY BUNSEN BURNER. HE IS GENERALLY CONSIDERED ONE OF THE GREATEST SCIENTISTS OF ALL TIME.
ALTHOUGH MICHAEL FARADAY (1791-1867) IS PRIMARILY KNOWN FOR HIS RESEARCH ON ELECTROMAGNETISM, HE MADE SIGNIFICANT CONTRIBUTIONS TO THE FIELD OF CHEMISTRY, INCLUDING DISCOVERING CHLORINE AND CARBON. FARADAY ALSO DISCOVERED BENZENE, CONTRIBUTED TO THE DEVELOPMENT OF ELECTROLYSIS, AND MADE MODERN CHEMISTRY LABS POSSIBLE BY INVENTING AN EARLY BUNSEN BURNER. HE IS GENERALLY CONSIDERED ONE OF THE GREATEST SCIENTISTS OF ALL TIME.
Answer: Option D. -> Methane
BY THE DESTRUCTIVE DISTILLATION OF COAL, WE CAN OBTAIN COAL GAS, COAL TAR AND AMMONIA. COKE IS LEFT AS A RESIDUE. COAL GAS CONTAINS METHANE, CARBON MONOXIDE AND HYDROGEN. SINCE ALL THE THREE ARE COMBUSTIBLE, COAL GAS IS A GOOD FUEL WITH A HIGH CALORIFIC VALUE.
BY THE DESTRUCTIVE DISTILLATION OF COAL, WE CAN OBTAIN COAL GAS, COAL TAR AND AMMONIA. COKE IS LEFT AS A RESIDUE. COAL GAS CONTAINS METHANE, CARBON MONOXIDE AND HYDROGEN. SINCE ALL THE THREE ARE COMBUSTIBLE, COAL GAS IS A GOOD FUEL WITH A HIGH CALORIFIC VALUE.
Answer: Option C. -> Fractional Distillation
FRACTIONAL DISTILLATION IS BASED ON THE FACT THAT THE DIFFERENT COMPONENTS OF OIL HAVE DIFFERENT BOILING POINTS. IN THIS PROCESS, OIL IS HEATED IN A FURNACE TO 400 DEGREE CELSIUS(752 F) AND IT VAPOURISES. THE VAPOURS ARE INTRODUCED INTO A TALL FRACTIONATING COLUMN.
FRACTIONAL DISTILLATION IS BASED ON THE FACT THAT THE DIFFERENT COMPONENTS OF OIL HAVE DIFFERENT BOILING POINTS. IN THIS PROCESS, OIL IS HEATED IN A FURNACE TO 400 DEGREE CELSIUS(752 F) AND IT VAPOURISES. THE VAPOURS ARE INTRODUCED INTO A TALL FRACTIONATING COLUMN.
Answer: Option D. -> 1, 2 & 3
MOST OFTEN THE SOIL IN THE FIELDS IS TOO ACIDIC. IF THE SOIL IS TOO ACIDIC (HAVING LOW PH), IT IS TREATED WITH MATERIALS LIKE QUICKLIME (CALCIUM OXIDE) OR SLAKED LIME (CALCIUM HYDROXIDE) OR CHALK (CALCIUM CARBONATE). THUS, A FARMER SHOULD TREAT HIS SOIL WITH LIME OR SLAKED LIME OR CHALK IN HIS FIELDS WHEN THE SOIL IS TOO ACIDIC.
MOST OFTEN THE SOIL IN THE FIELDS IS TOO ACIDIC. IF THE SOIL IS TOO ACIDIC (HAVING LOW PH), IT IS TREATED WITH MATERIALS LIKE QUICKLIME (CALCIUM OXIDE) OR SLAKED LIME (CALCIUM HYDROXIDE) OR CHALK (CALCIUM CARBONATE). THUS, A FARMER SHOULD TREAT HIS SOIL WITH LIME OR SLAKED LIME OR CHALK IN HIS FIELDS WHEN THE SOIL IS TOO ACIDIC.
Answer: Option D. -> All are correct
SIR SHANTI SWAROOP BHATNAGAR (1894 – 1955) WAS A COLLOID CHEMIST, ACADEMIC AND SCIENTIFIC ADMINISTRATOR. HE WAS FIRST DIRECTOR-GENERAL OF CSIR AND FIRST CHAIRMAN OF THE UNIVERSITY GRANTS COMMISSION. HE ESTABLISHED A TOTAL OF TWELVE NATIONAL LABORATORIES IN THE COUNTRY THUS WINNING THE EPITHET OF FATHER OF RESEARCH LABORATORIES IN INDIA.
SIR SHANTI SWAROOP BHATNAGAR (1894 – 1955) WAS A COLLOID CHEMIST, ACADEMIC AND SCIENTIFIC ADMINISTRATOR. HE WAS FIRST DIRECTOR-GENERAL OF CSIR AND FIRST CHAIRMAN OF THE UNIVERSITY GRANTS COMMISSION. HE ESTABLISHED A TOTAL OF TWELVE NATIONAL LABORATORIES IN THE COUNTRY THUS WINNING THE EPITHET OF FATHER OF RESEARCH LABORATORIES IN INDIA.
Answer: Option A. -> Only 1
COMMON INDICATORS, LIKE LITMUS, METHYL ORANGE AND PHENOLPHTHALEIN EASILY DETECT WHETHER A SOLUTION IS ACIDIC OR ALKALINE, BUT THEY CANNOT EASILY DETERMINE HOW MUCH A GIVEN ACIDIC SOLUTION IS STRONGER THAN ANOTHER ACIDIC SOLUTION. IT MEANS THEY CANNOT REALLY TELL US THE PH VALUE OF DIFFERENT ACIDIC OR ALKALINE SOLUTIONS. IN CASE OF LITMUS, WE CANNOT TELL ABOUT PH VALUES OF 5, 6 AND 7. SIMILARLY, IN CASE OF METHYL ORANGE PH VALUES BETWEEN 3 AND 8 WILL NOT BE VERY ACCURATE.
COMMON INDICATORS, LIKE LITMUS, METHYL ORANGE AND PHENOLPHTHALEIN EASILY DETECT WHETHER A SOLUTION IS ACIDIC OR ALKALINE, BUT THEY CANNOT EASILY DETERMINE HOW MUCH A GIVEN ACIDIC SOLUTION IS STRONGER THAN ANOTHER ACIDIC SOLUTION. IT MEANS THEY CANNOT REALLY TELL US THE PH VALUE OF DIFFERENT ACIDIC OR ALKALINE SOLUTIONS. IN CASE OF LITMUS, WE CANNOT TELL ABOUT PH VALUES OF 5, 6 AND 7. SIMILARLY, IN CASE OF METHYL ORANGE PH VALUES BETWEEN 3 AND 8 WILL NOT BE VERY ACCURATE.
Answer: Option C. -> Magnesium Hydroxide
PEOPLE SUFFERING FROM ACIDITY ARE GIVEN ANTACID TABLETS, CONTAINING MAGNESIUM HYDROXIDE WHICH NEUTRALIZES EXCESS HCL PRODUCED IN STOMACH.
PEOPLE SUFFERING FROM ACIDITY ARE GIVEN ANTACID TABLETS, CONTAINING MAGNESIUM HYDROXIDE WHICH NEUTRALIZES EXCESS HCL PRODUCED IN STOMACH.
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