ST. MARY’S ACADEMY
Hanuman Nagar, Raja Bajar, Arwal Road, Jehanabad
SUBJECT: SCIENCE CLASS: X FM: 20 Time: 1 hour
Pre-periodic - 1(2023-24)
GENERAL INTSTRUCTIONS: All the questions are compulsory.
 Write answers in good Hand writing.
 Marks are allotted to each question individually
A. Objective type questions.
1×5 = 5 Marks
a) Derive SI unit of current by it’s formula in terms of charge and time.
b) Define least count.
c) Write the expression of Ohm’s law?
d) Write an example of combination reaction.
e) Write chemical formula of Slacked lime .
B. Short answer type questions.
2×3 = 6 Marks
1) Define displacement reaction and write an example also.
2) Find the current drawn from circuit
3) Write short note on Antibiotics
C. Long answer type questions.
3×3 = 9 Marks
1) An electric circuit having 3 resistance connected in parallel each of 4
ohm connected to a cell of potential difference 10 V. Find the drawn
from the circuit .
2) What is neutralization reaction? Give an example also.
3) Derive the formula to calculate equivalent resistance of series and
parallel connection.