User:Neeti m/B.Sc.(H)Chemistry-part-II/House Exam Computer XII-2010

B.Sc. (Hons.)/II-(NS) CHEMISTRY-Paper-XII(a) (Computers and their Applications to Chemistry) House Examination-2010 Acharya Narendra Dev College

Time: 1Hour

Maximum Marks :25

1. Write the full form of the following:

(i) ALU(ii) MOS(iii) PDF(iv) ASCII(v)BASIC

(1x5)

2 Which of the following cannot be used as file name in BASIC. Give reason.

(i) New(ii) Maxwell(iii) Boltzman1(iv) 12chem(v) hello

(1x5)

3 Write commands for the execution of the following jobs on a computer in DOS.

1. 1. Copying a file MYFILE.BAS from C drive to D drive as MYFILE2.BAS
   2. Viewing all the files in C drive together with their details, page wise.

(1x2)

4 Specify which of the following can be used as input or output or both devices?

1. 1. Scanner (ii) Keyboard (iii) Monitor (iv) DVD (v) Printer (vi) Hard disk

(3)

5 (a) Write the following numbers as normalized floating point numbers

(i) –24689(ii) 0.000789

(b) Express the following numbers as decimal numbers

(i)1010(ii) 1000110

(c) Express the following as BASIC expressions

(i) x³+C_ax² −(K_a +C_a.K_w)x +K_aK_w(ii) V = nRT/(P + an²/ V²)+nb

(1,2,2)

6 (a)Write a program in BASIC to find the sum of first N natural numbers and the sum of the square roots of first N natural numbers.

(b)Give the use of the following commands

(i)RND(ii) DIM

(3,2)