(A) Similar physical properties (X)
(B) Similar chemical properties (X)
(C) Both A and b (X)
(D) None ()
Answers: All the transition elements show None.
(A) Enzymes (X)
(B) Nitrogenous bases ()
(C) Carbohydrates (X)
(D) Lipids (X)
Answers: Purines and pyrimidines are Nitrogenous bases.
(A) Carbon (X)
(B) Arsenic (X)
(C) Nitrogen ()
(D) Sulphur (X)
Answers: . Which of the following element doesnot show allotropy Nitrogen.
(A) fats (X)
(B) resins (X)
(C) iodine (X)
(D) all the above ()
Answers: Benzene is a good solvent for all the above.
(A) 0?C (X)
(B) 273.16K (X)
(C) ?273.16 K (X)
(D) ?273.16?C ()
Answers: If a graph is plotted between temperature on x-axis and volume on y-axis for 1 mole of gas then we get straight line which cuts the temperature exis at ?273.16?C.
(A) phenol is unsaturated. (X)
(B) 2-bromophenol is insoluble in water. (X)
(C) a hydroxy group makes the benzene ring more susceptible to electrophilic attack ()
(D) acid-base reaction. (X)
Answers: a hydroxy group makes the benzene ring more susceptible to electrophilic attack