1 All of the following substances are crystalline except_____________? Chemistry Medium Full question → A Ice B Diamond C Sucrose D Plastic
2 Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally______________? Chemistry Medium Full question → A ionic substances B metallic substances C molecular solids D covalent network solids
3 Which of the following is a substance? Chemistry Medium Full question → A Sea water B Brass C Tape water D Graphite
4 Sodium carbonate is produced by____________? Chemistry Medium Full question → A haber process B Amonia solvay process C decons process D lead chamber process
5 Electron was discovered by? Chemistry Medium Full question → A Michael Faraday B James Maxwell C Yuri Gagarin D J.J Thomson
6 The radioactive isotope of hydrogen is called___________? Chemistry Medium Full question → A tritium B deuterium C protium D ortho-hydrogen
7 The soul of chemistry is dealing with___________? Chemistry Medium Full question → A Internal structural changes in matter B Composition of matter C Properties of matter D Composition and properties of matter
8 Which of the following solids show anisotropy___________________? Chemistry Medium Full question → A Plastic B Glass C Rubber D None of the above
9 The rectified spirit is________________? Chemistry Medium Full question → A 12% alcohol B 90% alcohol C 95% alcohol D 100% alcohol
10 As a substance moves from a solid to a liquid all of the following changes occur except ? Chemistry Medium Full question → A molecules become more disordered. B K.E of the molecules decreases C intermolecular forces become weaker. D molecules move more frequently.
11 Oxygen (molecular weight = 32) diffuses at a rate of 10cm3/min under the same conditions of temperature and pressure how fast will hydrogen (molecular weight = 2) diffuse ? Chemistry Medium Full question → A 20cm3/min B 40cm3/min C 160cm3/min D 2.5cm3/min
12 Methyl alcohol is not used as___________________? Chemistry Medium Full question → A a solvent B an anti freezing agent C a substitute for petrol D for denaturing of ethyl alcohol
13 All the following variables are used to describle gases except__________________? Chemistry Medium Full question → A pressure B volume C moles D density
14 Dempsters mass spectrometer has number of zones / parts_________________? Chemistry Medium Full question → A 5 B 4 C 3 D 2
15 When 0.5 mole of phosphoric acid is dissolved in aqueous solution how many moles of -ve and +ve ions are collected altogether ? Chemistry Medium Full question → A 0.5 B 1 C 1.5 D 2
16 The nucleus of an atom of every element will always contain____________________? Chemistry Medium Full question → A neutrons B protons and electrons C protons D protons and neutrons
17 Which of the following methods is used to estimate hydrogen in an organic compound ? Chemistry Medium Full question → A Combustion method B Dumas method C Kjeldahls method D All of the above methods are for different purposes
18 Isotopes differ in_________________? Chemistry Medium Full question → A properties which depend upon mass B arrangement of electrons in orbitals C chemical properties D all of the above
19 Combustion analysis is performed to determine__________________? Chemistry Medium Full question → A Empirical formula B Molecular mass C Molecular formula D Formula mass
20 Qualitative analysis is carried out for _________________? Chemistry Medium Full question → A identification of elements B estimation of amounts of elements C molar ration of elements D molar volume of elements