Objective Questions In Chemistry – General Science Materials For Competitive Examinations Part 7
401. Temporary hardness of water is due to bicarbonates of Ca & Mg
402. An element with atomic number 7 will contain 7 electrons & 7 protons
403. Paracetamol is analgesic
404. Chemical equilibrium is noted in the reaction reversible
405. Hypo, used in photography, is sodium thiosulphate
406. Which will explode on detonation in the dry Sodium
407. In fat, the functional group is ester
408. Which among the following has the highest fuel value? fat
409. Which of the following has maximum electronegativity? S
410. In an endothermic reaction washing soda
411. Sodium bicarbonate is called baking soda
412. The chemical equation that correctly represents the reaction between hydrogen and oxygen is 2H2+O2?2H2O
413. Which is neither an element nor a compound? air
414. Which of the following substances is used for preservation of food grains? sodium benzoate
415. The water that does not produce good lather with soap is called hard water
416.Tha acid used in a car battery is sulphuric acid
417. Which of the following gases makes the major proportion of air? nitrogen
418. The growing plants need which of the following elements in largest quantity? nitrogen
419. Sodium thiosulphate is called hypo
420. Formalin is used as preservative
421. Among the following an anaesthetic is chloroform
422. Which one of the following is an example of a carcinogenic compound? Chloroform
423. The main constituent of glass is
calcium silicate
424. The rich source of nicotin is tobacco
425. The ozone layer in the upper atmosphere is formed due to the following reaction oxygen and UV-rays
426. The relative mass of an electrons is
427. Maximum 14 electrons are accommodated in sub shell f
428. Dynamite was discovered by Alfred Nobel
429. Chemically cane sugar is Sucrose
430. For the manufacture of cement, which of the following is used in the largest quantity? Calcium oxide
431. Bleaching powder has Chlorine
432. Iodised Salt is a mixture of common salt with Potassium iodide
433. Nitrogen is found in organic
substance proteins
434. Plant and animal wastes on biodegradation give Bio gas
435. Biogas mainly contains Methane
436. Which metal is present in Vitamin B12? Cobalt
437. Chalk is calcium carbonate
438. Metals lose electrons
439. The reagent that bleaches the colour of the fabric is SO3
440. Nicotine is Alkaloid
441. Oxidation involves loss of electrons
442. During the fermentation of sugars, the enzyme which converts glucose into ethyl alcohol is zymase
443. Pick the odd one out DDT
444. Gun powder is a mixture of charcoal, sulphur and potassium nitrate
445. Which is the non-inflammable organic compound CCI4
446. The substance that is not polymeric is Glucose
447. ……. is used as an anaesthetic Nitrous oxide
448. Which is used as a Lubricant? Graphite
449. Protein is made up of Amino acid
450. Which of the following is ka carbohydrate? Cane-sugar
