551. Phytochrome is Chromopeptide 552. Gobar gas is mixure of CH4CO and H2 553. Which chemical is used for preserving the biological specimens in the laboratories? Formaldehyde 554. Quarts is Calcium silicate 555. Which is the first man made element? TC 556. What is not correct about colloids? their stability is increased by adding an [...]
501. An aqueous solution of pH zero is none of the above 502. Economical method of separation of essential oils from nature sources is possible by fractional distillation 503. Dilantin sodium is an anti-inflammatory 504. One of the following is a heart drug Dizioxin 505. Nylon 66 is prepared from hexamethylene diamine and adipic acid [...]
The main raw material used in match industry is Potassium chlorate 452. An antifreeze used in automobile radiators is Glycal 453. Which one of the following is a cation? 454. Radioactive isotope of hydrogen is 1H3 455. Monozite is the principal source of Thorium 456. Vinegar is acetic acid 457. Which of the following was [...]
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 [...]
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 [...]
251. Which one of the following is a transition element? copper 252. The isotope 7N14 contains all of these 253. An atom of chlorine with atomic number 17 and mass number 35, contains in its nucleus 18 neutrons 254. Strach on hydrolysis gives Glucose 255. Which of the following helps the fermentation process? adding enzymes [...]
201. Fat is a lipid 202. Calorific value is in the order of fats? carbohydrates ?proteins 203. Vulcanisation is the process of a adding sulphur 204. Which one of the following is not a radioactive substance? calcium 205. Optical isomers have both (A) and (B) 206. The element with the maximum number of isotopes in [...]
101. Vinegar is 6-10% acetic acid 102. Gobar gas is a mixture of CH4, CO2&H2 103. Sand is SiO2 104. Rainwater helps to increase the ….of the soil nitrogen content 105. Which one of the following is not found in protein? S 106. Heavy water is the name given to D2O 107. Magnetron is used [...]
52 Petroleum mainly contains aromatic hydrocarbons 53. Bhopal gas tragedy of 1984 was caused by one of the following compounds: Methyl isocyanate 54. pH of blood is 7.4 55. The blue colour of water in the sea is due to scattering of blue light by water molecules 56. The acid present in vinegar is CH3COOH [...]
1. Zinc is not present in bronze 2. Dynamite was invented by Nobel 3. Periodic table was given by Mendeleev 4. Reduction is addition of Hydrogen. 5.Oxidation is addition of Oxygen. 5. The galvanized iron pipes are coated with zinc. 8. Non-stick kitchenwares are coated with Teflon. 9. Gobar gas mainly contains methane. 10. The [...]