Science Class 6th
181. Thar is an example of ______ environment.
A. Tropical rainforest
B. Desert
C. Grassland
D. Acquatic
182. Mosquito feeding on human blood is an example of ?
A. Predation
B. Parasitism
C. Mutualism
D. None of these
183. The name of the elements was suggested by?
A. Dalton
B. Robert Boyle
D. Bohr
D.None of these
184.______suggested that each element consists of its own kind of particles?
A. Boyle
B. Dalton
C. Newton
D. Bohr
185. Everything around us is made up of ?
A. Atoms
B. Ions
C. Formulas
D. Matter
186. The building bloc of matter is?
A. Atom
B. Molecule
C. Ion
D. Compound
187. Nobel gases are?
A. Helium
B. Neon
C. Both ‘a’ and ‘b’
D. None of these
188. Which of the following can’t exist as single atom?
A. Hydrogen
B. Helium
C. Neon
D. Argon
189. The smallest particle of substance which can exist independently?
A. Atom
B. Compound
C. Ion
D. Molecule
190. H2, O2 are?
A. Atoms
B. Molecules
C. Compounds
D. Both ‘b’ and ‘c’
191. CO and H2O are?
A. Molecules
B. Compounds
C. Both ‘a’ and ‘b’
D. Ions
192.______is composed of only one kind of atom and can’t be broken down further.
A. Molecule
B. Compound
C. Element
D. Mixture
193. Atoms of the same element are similar in _____properties.
A. Physical
B. Chemical
C. Both ‘a’ and ‘b’
D. None of these
194. Helium and Gold are?
A. Elements
B. Molecules
C. Mixtures
D. Ions
195. Elements are represented by?
A. Formula
B. Symbols
C. Units
D. None of these
196. Correct symbol for Sodium is?
A. So
B. Na
C. Sd
D. NA
197. _____ believed that atoms couldn’t be sub-divided into smaller particles.
A. Greeks
B. Egyptians
C. Italians
D. None of these
198. Modern research shows that atoms ?
A. Can be divided
B. Can’t divided
C. Sometimes divided sometimes not
D. None of these
199. Correct symbol of Iron is?
A. Ir
B. I
C. Fe
D. None of these
200. Electricity can pass through?
A. Metals
B. Non-metals
C. Both ‘a’ and ‘b’
D. None of these