English version
C M MIRAZUL ISLAM
LECTURER, DHAKA RESIDENTIAL MODEL COLLEGE
Model Test
Sub.Elementary Science
Time - 2.30 hours Full Marks - 100
1.Write the correct answer in the answer script: 140 = 40
1. Which gas is used in the packet of chips?
(a) Oxygen (b) Nitrogen
(c) Hydrogen (d) Carbon dioxide
2.Which one is the natural causes of water pollution?
(a) Arsenic (b) Natural gas
(c) Diarrhoea (d) Aresenchosis
3.Which one of the following is a correct food chain?
(a) Grassesgrasshoppersnakesfrog
(b) Grasshoppersnakesgrassesfrog
(c) Snakesgrasshoppersnakesfrog
(d) Grassessnakesfroggrasshopper
4.When is Arsenic discovered first in Bangladesh?
(a) In 1992 (b) In 1994
(c) In 1995 (d) In 1993
5.Which one is the major source of water?
(a) River(b) Sea(c) Cloud (d) Wasa
6.Which one is a waterborne disease?
(a) cholera(b) influenza(c) pox (d) fever
7.What does acid rain contain?
(a) Nitrogen(b) Sulphuric powder
(c) Sulphuric Acid (d) None of these
8.Which one is the compound of air?
(a) Carbon-dioxide(b) Carbon-mono oxide(c) Nitrogen(d) Oxygen
9.Which of the following is not an element?
(a) Carbon-dioxide (b) Carbon-mono oxide(c) Helium (d) Oxygen
10.How many main elements of air?
(a) Tow(b) Three(c) Five (d) Four
11.Which is a poisonous gas?
(a) Carbon-dioxide (b) Carbon-mono oxide
(c) Oxygen (d) Nitrogen
12.Which one does increase if fuel is burnt?
(a) Carbon-mono oxide(b) Carbon-dioxide
(c) Water Vapour(d) Nitrogen
13.Urea is produced using gas of air?
(a) Oxygen(b) Nitrogen
(c) Hilium(d) Carbon-dioxide
14. What colour is used to mark a tubewell with Arsenic water?
(a) Green(b) Yellow(c) Blue (d) Red
15.How many states of water are there?
(a) 2 (b) 3(c) 4 (d) 5
16. How long time is pond water to be boiled for making it germ free?
(a) 5-10 minutes(b) 10-20 minutes
(c) 15-20 minutes
(d) more than 20 minutes
17.What does an animal use for respiratory activity?
(a) Neon(b) Argon(c) Oxygen(d) Nitrogen
18. Which one prevents food form decaying?
(a) Oxygen(b) Nitrogen(c) Hydrogen (d) Carbon-dioxide
19.The main source of energy —.
(a) Electricity (b) Plants
(c) The Sun (d) Animals
20. Which of the following is a food chain?
(a) Grassinsectfrog
(b) Froginsectgrass
(c) Insectfroggrass
(d) Grassfroginsect
21.Where from we take energy for existence?
(a) Soil(b) Water(c) Food (d) Air
22.How many kinds of pollution take place in our environment?
(a) 2 (b) 3(c) 4 (d) 5
23.What does cause the change of states of water?
(a) Pressure (b) Heat
(c) Sound (d) None of the above
24.What is the main factor for water cycle?
(a) Current of water
(b) Saltiness of sea water
(c) Heat from sun (d) All the above
25.Which is the best method of water fully free from germs?
(a) Filtration(b) Sedimentation
(c) Boiling(d) Chemicals
26.Water purified is used table —.
(a) Paracitamol (b) Renitid
(c) Halogen (d) Oxidin
27.Leaves of plants contain —.
(a) Pigments (b) Cholorophyll
(c) Photosynthesis (d) Food
28.The plants in presence of light and water produce food by the process of —
(a) Cholorophyll(b) Pigments
(c) Photosynthesis(d) Survival
29.Which one of the following causes air pollution?
(a) Use of pesticide
(b) Burning bricks in the brick fields
(c) Obstacle of rain water
(d) Use of chemical fertilizer
30.Which is the main reason of air, water and soil pollution?
(a) Waster from industry
(b) Use of vehicle
(c) Open latrine upon a water-body (d) Meet the demand of population
31.In which state does water remain on high mountain peaks?
(a) Water(b) Water vapour(c) Dew(d) Ice
32.Which one is air borne disease?
(a) Jaundice(b) Dysentery
(c) Lung cancer(d) Typhoid
next part tomorrow day
