NCERT 2022 | विद्युत - L3 | Electricity | Class 6 विज्ञान | Hindi Medium | Ruchi Ma'am| 6 PM

What will be the volume strength of 100 ml of H_(2)O_(2) required to react completely with 61 ml of KMnO_(4) in acidic medium ? ( Given that 61 l of KMnO_(4) reacts completely with 5 ml of 1M of K_(4)[Fe(CN)_(6)] where it converts into K^(+),Fe^(3+),CO_(3)^(2-) and NO_(3)^(-) )

A clock, which loses uniformly is 15 minutes fast at 9 am on 3rd of the December and is 25 minutes less than the correct time at 3 pm on 6th of the same month. At what time it was correct ?

In a class of 50 students, 23 speak English, 15 speak Hindi and 18 speak Punjabi. 3 speak only English and Hindi, 6 speak only Hindi and Punjabi and 6 speak only English and Punjabi. If 9 speak only English, then how many speak all the three? (a) 1 (b) 2 (c) 3 (d) 5

A charged cylinder of radius 3 mm has surface density of charge 4muC//m^(2) . It is placed in a medium of dielectric constant 6.28. The electric intensity at a point at a distance of 1.5 M from its axis is

Electric intensity at a point outside a charged spherical conductor surrounded by air is 6 N/C. If the space around the conductor is filled with a medium of dielelctric constant 3, then the electric intensity at the same point will be

A company manufactures car batteries of a particular type. The lives (in years) of 40 such batteries were recorded as follows: 2.6 3.0 3.7 3.2 2.2 4.1 3.5 4.5 3.5 2.3 3.2 3.4 3.8 3.2 4.6 3.7 2.5 4.4 3.4 3.3 2.9 3.0 4.3 2.8 3.5 3.2 3.9 3.2 3.2 3.1 3.7 3.4 4.6 3.8 3.2 2.6 3.5 4.2 2.9 3.6 Construct a grouped frequency distribution table for this data, using class intervals of size 0.5 starting from the interval 2 - 2.5.