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Home⇒ Everyday Science GK⇒ Chemistry
Note:- You can add tough questions into your favourite list for second revision. |
Q21 ⇒ The mass of POthat will be obtained from the reaction of 1.33 gram of Pand 5.07 of oxygen is 3.05 gram [other wrong options] [Discuss in forum] 2.05 gram 4.05 gram 5.05 gram |
Q22 ⇒ The first metal used by man was copper [other wrong options] [Discuss in forum] iron gold bronze |
Q23 ⇒ The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is Henry's law [other wrong options] [Discuss in forum] Dalton's law Gay Lussac's law Raoult's law |
Q24 ⇒ The mass of one Avogadro number of helium atom is 4.00 gram [other wrong options] [Discuss in forum] 1.00 gram 8.00 gram 4 x 6.02 x 1023 gram |
Q25 ⇒ The method that cannot be used for removing permanent hardness of water is boiling [other wrong options] [Discuss in forum] adding sodium carbonate distillation adding caustic soda |
Q26 ⇒ The number of moles of solute present in 1 kg of a solvent is called its molality [other wrong options] [Discuss in forum] molarity normality formality |
Q27 ⇒ The most important ore of aluminium is bauxite [other wrong options] [Discuss in forum] magnetite haematite monazite |
Q28 ⇒ Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be 01:16:02 [other wrong options] [Discuss in forum] 02:16:02 02:16:01 01:01:01 |
Q29 ⇒ What are the number of moles of CO2 which contains 16 g of oxygen? 0.5 mole [other wrong options] [Discuss in forum] 0.2 mole 0.4 mole 0.25 mole |
Q30 ⇒ The major constituent of air is nitrogen [other wrong options] [Discuss in forum] carbon dioxide oxygen hydrogen |
Q31 ⇒ The hydronium ion is H3O+ [other wrong options] [Discuss in forum] H+ HO - H2+ |
Q32 ⇒ The octane number of zero is assigned to n-heptane [other wrong options] [Discuss in forum] 2-methyl octane iso-octane 3-methyl octane |
Q33 ⇒ The items amenable to detection by soft x-rays are genuine coins from counterfeit coins [other wrong options] [Discuss in forum] contrabands lead in bullets narcotics |
Q34 ⇒ The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle? 0.01 minute [other wrong options] [Discuss in forum] 3 billion years 100 years 13 days |
Q35 ⇒ The mass number of an atom is equal to the number of nucleons [other wrong options] [Discuss in forum] the number of protons the number of protons and electrons the number of neutrons |
Q36 ⇒ The main buffer system of the human blood is H2CO3 - HCO3 [other wrong options] [Discuss in forum] H2CO3 - CO32- CH3COOH - CH3COO- NH2CONH2 - NH2CONH+ |
Q37 ⇒ The organic reaction represented by equation CH- CH = O + HNOH gives CH- CH - NH + HO is an example of a condensation reaction [other wrong options] [Discuss in forum] an addition reaction an oxidation reaction an elimination reaction |
Q38 ⇒ The main use of salt in the diet is to produce in small amounts the hydrochloric acid required for the digestion of food [other wrong options] [Discuss in forum] make the taste of food better ease the process of cooking increase the solubility of food particles in water |
Q39 ⇒ The most electronegative element among the following is fluorine [other wrong options] [Discuss in forum] sodium bromine oxygen |
Q40 ⇒ The main chemical constituent of clay is aluminium silicate [other wrong options] [Discuss in forum] silicon oxide aluminium borosilicate zeolites |
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