Please refer to Assignments Class 11 Chemistry Hydrogen Chapter 9 with solved questions and answers. We have provided Class 11 Chemistry Assignments for all chapters on our website. These problems and solutions for Chapter 9 Hydrogen Class 11 Chemistry have been prepared as per the latest syllabus and books issued for the current academic year. Learn these solved important questions to get more marks in your class tests and examinations.
Hydrogen Assignments Class 11 Chemistry
Question. Dihydrogen gas may be prepared by heating caustic soda on
(a) Cu
(b) Zn
(c) Na
(d) Ag
Answer
B
Question. The maximum density of water at 40C is :
(a) 1.0 g / cm³
(b) 0.998 g / cm³
(c) 0.918 g / cm³
(d) 1.2 g / dm³
Answer
A
Question. The atomic weights of isotopes of all element are different due to different number of __________.
(a) Protons
(b) Electrons
(c) Neutrons
(d) None of Above
Answer
C
Question. Water gas is mixture of hydrogen H2 and
(a) CO
(b) CO2
(c) Cl2
(d) SO2
Answer
A
Question. Which of the following pair of substance will not evolve H2 gas
(a) Iron and aqueous H2SO4
(b) Copper and HCl(aq)
(c) Sodium and Ethanol
(d) Iron and Steam
Answer
B
Question. The number of electron hydrogen contains in its K shell is
(a) 1
(b) 2
(c) 3
(d) 4
Answer
A
Question. Water shows anomalous behavior between
(a) 0 to 4 °C
(b) 0 to 5 °C
(c) 0 to -4 °C
(d) 4 to 0 °C
Answer
A
Question. Hydrogen has isotopes
(a) 2
(b) 3
(c) 4
(d) 5
Answer
C
Question. Tritium __________ radio active isotope.
(a) Beta-Emitting
(b) Alpha – Emitting
(c) Gamma-Emitting
(d) None of the Above
Answer
A
Question. When water is dropped over sodium peroxide, the colourless gas produced is:
(a) DiNitrogen
(b) DiOxygen
(c) DiHydrogen
(d) Hydrogen Peroxide
Answer
B
