- Select the correct statement from the following option.?
a) Conjugate effect is stronger than (-I) effect
b) Conjugate effect is weaker than (-I) effect
c) Conjugate effect is same as (-I) effect
d) None of the mentioned - which one is not isomer of butanone?
a) 2,3-epoxybutane
b) ethyl vinyl ether
c) 1,2-butanol
d) ter-butyl ether
43.larger the number of hyperconjugation structures, the stability of free radicals will __?
a) Increase
b) Decrease
c) Remains same
d) None of the mentioned
- Molisch test is used for _.?
a) Lipids
b) Proteins
c) Carbohydrates
d) Flavoproteins - Absorbance at 280nm is exhibited by proteins is due to?
a) aliphatic amino acids
b) aromatic amino acids
c) all amino acids
d) none of these - The compound does not contain the phosphate group, is?
a) Nucleotide
b) Nucleoside
c) Both A & B
d) None of these
47- Phosphate group is attached to which carbon of pentose sugar?
a) C-1
b) C-2
c) C-4
d) C-5
- If electricity is passed through a CuSO4 solution by using a Pt electrode then which of the following possible change occurs?
a) H2 is deposited at the cathode
b) Colour of the solution becomes fade
c) Cu is deposited at an anode
d) All are possible - The degree of dissociation of week electrolyte increases as?
a) Pressure Increases
b) Dilution decreases
c) Dilution increases
d) None - What is the pH of HCl solution when the hydrogen gas electrode shows a potential of -0.22 V at standard temperature and pressure?
a) 2.17
b) 2.98
c) 3.73
d) 3.14 - Which among the following reagent can be used to distinguish between CH2CHC≡CH from CH3CH≡CCH3?
a) Br2/CCl4
b) cold KMnO4
c) Ammonical AgNO3
d) Ag(NH3)2OH - Ethane is obtained by electrolyzing __?
a) Potassium formate
b) Potassium succinate
c) Potassium acetate
d) Potassium fumarate - Most of the explosions in the mines in due to?
a) methane and air
b) oxygen with acetylene
c) hydrogen with oxygen
d) none of these - Which statement is not true?
a) Alkanes undergo only substitution reactions
b) Alkenes and alkynes undergo both substitution and addition reactions
c) Alkanes undergo both substitution and addition reactions
d) none of these - Highest pH will be recorded for which of the following solutions if they are equimolar?
a) AlCl3
b) LiCl
c) BeCl2
d) BaCl2 - On increasing the concentration of reactants in a reversible reaction, then equilibrium constant will?
a) depend on the concentration
b) increase
c) unchanged
d) decrease - The pH of 10-3 mol dm-3 of an aqueous solution of H2SO4 is?
a) 3
b) 2.7
c) 2
d) 1.5 - The average rate and instantaneous rate of a reaction are equal?
a) at the start
b) at the end
c) in the middle
d) when two rates have a time interval equal to zero
59- Consider the equilibrium system:, 2ICl(s) <—-> I2(s) + Cl2(g), Which of the following changes will increase the total amount of of Cl2 that can be produced?
a) removing the Cl2 as it is formed
b) adding more ICl(s)
c) removing some of the I2(s)
d) all of the above
- Total number of nodes for 3d orbital is __?
a) 3
b) 2
c) 1
d) 0
