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Home⇒ Everyday Science GK⇒ Chemistry
Note:- You can add tough questions into your favourite list for second revision. |
Q1 ⇒ The heat required to raise the temperature of body by 1 K is called thermal capacity [other wrong options] [Discuss in forum] ![]() ![]() specific heat water equivalent None of the above |
Q2 ⇒ The molecules of which gas have highest speed? H2 at -73oC [other wrong options] [Discuss in forum] ![]() ![]() CH4 at 300 K N2 at 1,027oC O2 at 0oC |
Q3 ⇒ The high reactivity of fluorine is due to its high electro negativity [other wrong options] [Discuss in forum] ![]() ![]() small size of fluorine atom availability of d-orbitals strong F - F bond |
Q4 ⇒ The main active constituent of tea and coffee is caffeine [other wrong options] [Discuss in forum] ![]() ![]() nicotine chlorophyll aspirin |
Q5 ⇒ The ionic radii of N, O, Fand Nafollows the order N3- > O2- > F- > Na+ [other wrong options] [Discuss in forum] ![]() ![]() N3- > Na+ > O2- > F- Na+ > O2- > N3- > F- O2- > F- > Na+ > N3- |
Q6 ⇒ The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3 4 [other wrong options] [Discuss in forum] ![]() ![]() 5 2 zero |
Q7 ⇒ The oil used in the froth floatation process is pine oil [other wrong options] [Discuss in forum] ![]() ![]() coconut oil olive oil kerosene oil |
Q8 ⇒ The inherited traits of an organism are controlled by DNA molecules [other wrong options] [Discuss in forum] ![]() ![]() RNA molecules nucleotides enzymes |
Q9 ⇒ The nuclear particles which are assumed to hold the nucleons together are mesons [other wrong options] [Discuss in forum] ![]() ![]() electrons positrons neutrons |
Q10 ⇒ The maximum number of isomers for an alkene with molecular formula CHis 4 [other wrong options] [Discuss in forum] ![]() ![]() 5 2 3 |
Q11 ⇒ The iron ore magnetite consists of Fe2O3 [other wrong options] [Discuss in forum] ![]() ![]() Fe3OH4 FeCO3 3Fe2O3 .. 3H2O |
Q12 ⇒ The graphite rods in the nuclear reactor convert fast moving neutrons into thermal neutrons [other wrong options] [Discuss in forum] ![]() ![]() react with U to release energy produce neutrons undergo combustion which triggers the nuclear fission |
Q13 ⇒ The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called igneous rocks [other wrong options] [Discuss in forum] ![]() ![]() granite basalt sedimentary rocks |
Q14 ⇒ The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in 12 moles of KMnO4 [other wrong options] [Discuss in forum] ![]() ![]() 1.8 gram of H2O 0.6N H2SO4 4.6 gram of C2H5OH |
Q15 ⇒ The number of waves in n x 10Bohr's orbit are n [other wrong options] [Discuss in forum] ![]() ![]() n2 n-2 n3 |
Q16 ⇒ The nucleus of an atom consists of protons and neutrons [other wrong options] [Discuss in forum] ![]() ![]() electrons and neutrons electrons and protons All of the above |
Q17 ⇒ The heat energy produced when the human body metabolises 1 gram of fat is 39 KJ [other wrong options] [Discuss in forum] ![]() ![]() 30 KJ 1 KJ 29 KJ |
Q18 ⇒ The hardest form of carbon is diamond [other wrong options] [Discuss in forum] ![]() ![]() coke graphite charcoal |
Q19 ⇒ The National Chemical Laboratory is situated in Pune [other wrong options] [Discuss in forum] ![]() ![]() New Delhi Bangalore Patna |
Q20 ⇒ The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2orbit to 3orbit is 5x/36 [other wrong options] [Discuss in forum] ![]() ![]() 5x 7.2 x x/6 |
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