On this page we have uploaded MBOSE HSSLC Class 11 Question Paper for Chemistry released by www.mbose.in. The question paper provided here from Meghalaya State Board. Download the 2019 question paper pdf as well.
Meghalaya State Board has published subject wise question paper for this year Class 11 students in its official portal www.mbose.in. Here we have published Class 11 MBOSE question paper 2019-20 for Chemistry subject. For more information regarding Meghalaya HSSLC Class 11 2019 Exam Date, Exam Pattern, Time, Date, How to prepare follow our website.
Meghalaya Board (MBOSE) HSSLC Class 11 Question Papers – Chemistry Subject
Choose the correct answer:
(1) Metals, non-metals and semi-metals can only be found in:
(a) s – block
(b) p – block
(c) d – block
(d) f – block
(2) Considering the elements B, C, N and F the correct order of their non-metallic character is:
(a) B > C > N > F
(b) C > B > N > F
(c) F > N > C > B
(d) F > N > B > C
(3) Which one of the following molecule does not have zero dipole moment:
(a) CO2
(b) BF3
(c) H2O
(d) CCl4
(4) Which one of the following is not an example of redox reaction?
(a) CuO + H2 à Cu + H2O
(b) Fe2O3 + 3CO à2Fe + 3CO2
(c) 2K + F2 à 2KF
(d) BaCl2 + H2SO4 à BaSO4 + 2HCl
(5) The IUPAC name for:
(a) 1-chloro-2-nitro-4-methylbenzene
(b) 1-chloro-4-methyl-2-nitrobenzene
(c) 2-chloro-1-nitro-5-methylbenzene
(d) m-nitro-p-chlorotoluene
Part – II
(6) State the law of definite proportion.
(7) Write the electronic configuration of Cr (atomic number = 24) or Ni2+ (atomic number = 28)
(8) Define Dalton’s law of partial pressure
(9) What is hard water?
(10) Write the structure of B2H6
Part – III
(11) Calculate the molality of 15% H2SO4 solution by mass.
(12) What will be the wavelength of a ball of mass 0.1 Kg moving with a velocity of 10 ms-1? (h = 6.626 ×10-34J)
(13) Derive de-Broglie’s equation.
(14) What is diagonal relationship? Discuss any two points to show diagonal relationship between Li and Mg.
Either
(15) What is Bond enthalpy? Arrange H2, N2 and O2 in increasing order of Bond enthalpy.
Or
Draw the structure of SF6 and SF4 on the basis of VSEPR theory.
(16) It water vapour is assumed to be a perfect gas, molar enthalpy change for vapourisation of 1 mol of water at 1 bar and 100°C is 41 kJ mol–1. Calculate the internal energy change, when 1 mol of water is vapourised at 1 bar pressure and 100°C.
Either
(17) What are Homolytic and Heterolytic cleavage?
Or
Define Anti–Markovnikov’s rule with suitable example.
Part – IV
(18) Draw the molecular orbital diagram of N2 molecule and interpret its magnetic behaviour.
Or
Draw the molecular orbital structure for C2H4 and C2H2 and mention their bond angles.
(19) (a) Calculate the volume occupied by 8.8 g of CO2 at 31.1°C and 1 bar pressure.
R = 0.83 bar L K-1 mol-1
(b) Write the formula of van der Waal’s equation of state.
20.) (a) What is buffer solution?
(b) The concentration of hydrogen ion in a sample of soft drink is 3.8 × 10-3 M. What is its pH?
(21) (a) Which element shows always a negative oxidation state?
(b) Balance the following equation in acidic medium by half – reaction method:
MnO–4 + Fe2+ à Mn2+ + Fe3+
Either
22.) (a) What are the Isotopes of Hydrogen?
(b) Explain the position of Hydrogen in the periodic table.
Or
(c) What are metallic hydrides? Give one example each.
(d) What is heavy water?
(23) (a) Why are alkali metals not found in nature?
(b) Write the equation involved in the manufacture of Na2CO3 in Solvay’s process.
24.) (a) What is Catenation?
(b) Why does graphite conduct electricity?
(c) Write one use of Zeolite.
25.) (a) What is a functional group?
(b) What is Inductive effect?
(c) Write the resonance structures of Aniline.
Either,
26.) (a) Write the two geometrical isomers of But-2-ene.
(b) Complete the following equation:
Or
(c) What is Wurtz reaction?
(d) Write the products of the following reaction:
Part – V
27.) A factory was started near a village. Suddenly villagers started feeling the presence of irritating vapour in the village and causes of headache, chest pain, cough, dryness of throat and breathing problems increased. Villagers could not understand the causes of these health problems. Explain how will you educate the people of such environmental hazards and will take up the matter with factory owner to solve these problems.
Either
(28) (a) Define closed system and isolated system.
(b) State 3rd law of thermodynamics.
(c) Derive the relation,
△H = △U – P △V
Or
(d) State Hess’s law of constant heat summation with example.
(e) Under which conditions a process can be spontaneous? Explain with the help of △G = △H – T △S
29.) (a) Why ice floats on water?
(b) Why hydrogen peroxide is stored in black plastic bottle?
(c) Complete the following reactions.
(30) (i) What is Homologous Series?
(ii) Write the Positional Isomers of C3H6O
(iii) What happens when (Give equation)
(a) Propyne is treated with hydrogen in presence of Ni as catalyst.
(b) Ethanol is heated with Conc. H2SO4 at 440K.
(c) Propene undergoes ozonolysis