Tick True/False against the following statements. (a) Fossil fuels can be made in the laboratory. (T / F) (b) CNG is more polluting

Rutherford’s alpha-particle scattering experiment was responsible for the discovery of  (a) Atomic nucleus      (√ )  (b) Electron                 ( x )  (c) Proton     ...

    Isotopes of an element have  (a) the same physical properties   ( x )  (b) different chemical properties    ( x )  (c) different number of neutrons    (√ )  (d) different atomic...

Number of valence electrons in Cl− ion are:  (a) 16 ( x )  (b) 8 (√ )  (c) 17 ( x )  (d) 18 ( x )

The advantages of using compressed natural gas (CNG) and liquefied petroleum gas (LPG) as fuels are:  → They can be burnt directly.  → They can be transported easily through pipe lines.  → They...

(a) True  (b) False  (c) False  (d) True  (e) False  (f) False  (g) True 

Fossils provide evidence in favour of evolution or establish evolutionary relationships by providing missing links.  Two ways to determine the age of fossils  1. Relative method – Fossils found closer to the surface are...

(a) False – Tongue is attached to the floor of the mouth  cavity at the back. (b) False – The large intestine is shorter and wider than the small intestine of...

(a) False. Substances can be neutral as well. (b) False. Acids do not turn all indicators red. (c) True (d) False. It does not change the colour of litmus at all. (e) False. It...

(a) False, it is easy to predict the climate rather than the weather. (b) False, (since very few prey are available) polar bear need to have a strong sense of smell. (c)...

Tick    (√) against i, ii, iii, viii, x Cross (×) against iv, v, vi, vii, ix