Question

Can anybody answer question which u now.. Or all please

Answer 1

6(a) heat is directly proportional to square of current, resistance and time.

Or

(a)P=v^2/r

R=250*250/1500=125/3

I=v/r

I=250*3/125

6ampere

(b) e=p*t

Convert 1500 w into kw

1500/1000*60

90 kwh

(c) 90*6

Rs540

7(b) bcz if one appliance stops working rest will also stop working

Also,voltage is not same

Lighting of all the bulbs will not be same

9.BaCl2+Al2(SO4)3=AlCl3+BaSo4

Percipitate and double displacement reaction

10.(a) 11-basic

5-acidic

7-neutral

2- highly acidic

(b) 5

(c) by using toothpaste bcz it is basic in nature to neutralize acid

Or

(a)Sodium hydrogencarbonate

(b) nh3+nacl+H2O+co2=nahco3+nh4cl

Hence nahco3 (Sodium hydrogencarbonate)

(c) is used in making tartaric acid

Bitter taste to cake