Applications of Computers in Chemistry — DU B.Sc (hons) Chemistry Previous Year Question Papers

Time: 3 Hours aximum Marks : 90 Answer six questions in all. 1. (a) Explain with examples, what each of the below functions do : 5 (iii) round (m, n) (b) What would be the output of the below lines of code :: 2×5=10 (i) print ("chemistry" * 2t". join (I'p', 'Y' (ii) if (abs (-2)> = 2 and (5% 3 = = 2)) : print ('Yes') (iii) for x in range (2) : nparray = np. array ([listl, list 2]) print (nparray. shape) plt. plot (x, y) 2. (a) Write the full form of below acronyms : (b) Write the below algebraic/scientific expressions in Python friendly format : (c) Six parts of the below program are missing and shown as underlines. Find all the six missing part: 5 def throw_dice (1) : ."• # Simulate throwing two dice by randomly selecting a number from 1 to 6 playerl _throw = player 2 _ throw = print ("Player 1 throws : ",player1. _throw) print ("Player 2 throws: ",player2_throw) # Determine the winner based on who gets the larger number print ("Player 1 wins !") print ("Player 2 wins !") print ('It's a tie !") # Run the dice - throwing game throw _dice () 3. (a) What is the difference between : 1×5=5 (i) Storage and Memory (ii) Interpreted Language and Compiled (b) Write python programs to : (i) plot a simple sine curve from - 2 radians to + 2 radians 2.5 (ii) convert any given angle from degrees to radians using function 2.5 (c) Write a Python program to evaluate the integral J(x'-3x+2)dx" using the integration. There is no need to show the output. 4. (a) Which of the following is ą valid Python variable name. Wherever you mention it is invalid, please provide a one - line reason why it is invalid. 1×5=5 (iii) 2 sigma (v) i_am_a_really_really_long python_variable_name (b) Write a Python program to identify Armstrong numbers using string manipulations. An Armstrong number is a number that is equal to the sum of its own digits each raised to the power of the number of digits in the number. 5 Given the periodic table of elements in the dictionary format as follows : Write a Python program to find the first 8 Prime Numbers and then print the symbols of elements corresponding to these numbers from the above periodic table P as a list. For example, the list's first two elements would be ["He" ; "Li"....] 5 (c) The below program produces FIVE lines of output. Provide all 5 lines of output in the correct sequence : 5 print (c. pop ()) print (b)", a = a * len (b) print (len (d.keys () )) • 5. (a). Find and correct the errors in the below lines (iii) print "quantum" ( (iv) for i = 1 to 4 print i (v) import numpy into up (b) Do any two parts from the below 3 parts for this question : 2,5×2=5 Write python programs (without the use of numpy/scipy/statistics) to (i) Find the average and standard deviation of a given list of numbers (ii) To Print the first 10 terms of a Fibonacci series (iii) Print the difference between the first 10 odd numbers and the first 10 even numbers and show that it will be zero. Please exclude o from your computation.