Question

1.In a spring balance , the part of scale between 10g and 30g is divided into 20 equal parts. The least count of spring balance is
a) 1g b) 2g c) 5g d) 20g
2. If a cuboid is mounted on the top of an inverted mounted object , the totl pressure exerted on the sand
a) remains same b) increases c) decreases d) cannot say
3. Four discs of equal radius are mounted one above the other. How many discs shoul be stacked to exert maximum pressure?
a) one b)two c)three c)four
4. The density of a ball of mass 8g, which displaces 4ml of water being immersed in its
a) 4000 kg/m^3 b)2000 kg/m^3 c)1000 kg/m^3 d) 8000 kg/m^3
5. Lead nitrat solution for the verification of law of conservation of mass should be prepared in
a) distilled water as it does not contain Cl- ion which reacts with Pb2+ ions to form Pbcl2
b)tap water as it contains Cl- ion
c)distilled water as it contains NO3- ion
d)tap water as it contains Ca2+, Mg2+ , and Cl- ion
6. Name the unit which measures power of big machines and relate it with SI unit of power.
7. Write the electronic distribution in Phosphorous -3 ions.

Answer 1

hey

answer is a

hope helps you

Answer 2

In a spring balance, the part of scale between 10g and 30g is divided into 20 equal parts. The least count is (a) 1g (b) 2g (c)5g (d) 20g