Objective Questions In Chemistry – General Science Materials For Competitive Examinations Part 6
351. Basic principle of the hydrogen bomb is nuclear fusion
352. The charge on a proton is 16?109C
353. The two isotopes of chlorine are 17CI37and17CI37; both of them contain
all of these
354. The metal which is found in liquid state at room temperature is Mercury
355. The major constituent of Super-phosphate of lime is Phosphorous
356. Electrovalent bond is formed between two electronegative elements
357. Of the following substances the one which can turn blue litmus paper to red is CH3COOH
358. The element having only proton in the nucleus is Hydrogen
359. pH of water 7
360. The sides of a match box contains red phosphorus
361. The acid which etches glass is hydrofluoric acid
362. Helium is preferred to hydrogen is airships because it does no form explosive mixture with air
363. Which of the following has the smell of garlic? phosphorus chloride
364. A common nitrogenous fertilizer is urea
365. Which element is a metalloid in the following? arsenic
366. Highest ionization energies are found in halogens
367. The bonds present in acetylene are 2pi, 3 sigma bonds
368. When methyl orange is added to hydrochloric acid, it takes the colour pink
369. The most abundantly found gas in atmosphere is nitrogen
370. Spirit is methyl alcohol
371. Among the following a fertilizer is calcium sulphate
372. In the modern periodic table, elements are classified on the basis of atomic number
373. Why is tungsten used in electric bulbs? it is cheaper than other metals
374. Radon is inert gas
375. ……. is a synthetic polymer PVC
376. The element that shows maximum catenation is carbon
377. In covalent solids…. occupy the lattice positions electrons
378. Ice is…… compound covalent
379. When silver tarnishes in air it turns black. This indicates that there is ……. in air. hydrogen sulphide
380. What is the black board chalk made of? lime
381. The substance that is not polymer is glucose
382. The main active ingredient of tea and coffee is caffeine
383. Riboflavin is a/an vitamin
384. The vitamin responsible for blood clotting is K
385. The most abundantly found metal in the human body is calcium
386. Steel contains 0.1 to 2% carbon
387. Morphine is a/an stimulant
388. Air contains what percentage of oxygen? 21
389. An atom of iron is …… times as heavy as an atom of hydrogen 238
390. Which is the gas emitted from the road vehicles causing pollution? carbon monoxide
391. Which of the following compounds is responsible for acid rain? Sulphur dioxide
392. Element discovered alter Mendeleef’s tabulation is germanium
393. The food which gives an athelete instant energy is glucose
394. Which is an example of an antibiotic? Streptomycin
395. Which of the following gases is known as laughing gas? Nitrous oxide
396. The acid associated with the soaps is fatty acid
397. The substance used in making hairdye is silver nitrate
398. The substance present in spurious liquors causing blindness is
methanol
399. The number of neutrons in 13AI27 is 14
400. Avagadro’s law is applicable to gases
