Question 541 Which of the following among alkali metals is most reactive? A) Na B) K C) Rb D) Cs No Details
Question 543 Which has maximum calorific value? A) Fat B) Protein C) Carbohydrate D) Amino acid No Details
Question 544 Which of the following catalyst is sensitive to tempreture changes? A) Fe B) Pt C) Ni D) Enzyme No Details
Question 546 Which of the following gases will have the highest rate of diffusion? A) O2 B) CO2 C) NH3 D) N2 No Details
Question 547 Red litmus paper is changed into blue in solution of? A) Base B) Acid C) Salt D) None No Details
Question 549 The maximum number of hydrogen bonds is a H2O molecule is? A) 1 B) 2 C) 3 D) 4 No Details
Question 550 The heaviest naturally occurring elements is? A) Thorium B) Uranium C) Mercury D) Polonium No Details