Put a tick (√) against the garbage items given in Table 16.1 which could be converted into manure. Put a cross (×) against the others.

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 )

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

(a) Garbage Disposal is the responsibility of every citizen. If we continue to generate so much garbage, the spreading diseases will increase at large scale. Non-biodegradable waste like plastic, polybags...

RED GREEN BLUE (C) (i),(iii) And (v) (iv)and (iv)  (ii) only

(ii) Cover the bottom of the pit with sand (i) Put garbage in a pit (iii) Cover the pit loosely with a gunny bag or grass (iv) Add worms

(i) Convert into compost. (ii) Use as manure. (iii) Recycle to make paper bags or paper pulp for handicrafts.

Yes, I have seen a doctor using a stethoscope. She hears the heart beat by using stethoscope. This sound comes from our heart. No, there is no clock inside our...

(c) A = C + 3, D = B – 4, E = F – 6  C = E + 2, F = D + 3  On adding, we get A =...