The mass of a body as measured by two students is given as 1.2 kg and 1.23 kg. Which of the two is more accurate and why?

Which of the two NH_3 and PH_3 is more basic and why ?

Which of the two NH_3 and PH_3 is more boiling point and why?

The mass of a box measured by a grocer's balance is 2.3 kg. Two gold pieces of masses 20.15g and 20.17 g are added to the box. What is the total mass of the box

Two vessels of the same size are at the same temperature. One of them holds on kg of H_2 gas and another 1 kg of N_2 gas. Which of the vessels is under greater pressure and why?

The mass of a box measured by a grocer’s balance is 2.300 kg. Two gold pieces of masses 20.15 g and 20.17 g are added to the box. What is:- the difference in the masses of the pieces to correct significant figures ?

You are given two solution A and B having pH 1 and 6. which of these has more hydrogen ion concentration?

Two vessels of the same size are at the same temperature. One of them holds on kg of H_2 gas and another 1 kg of N_2 gas. Which of the vessels contains more molecules?

The position time graph of a body of mass 2 kg is as given in the figure. What iws the impulse on the body at t = 0 s and t = 4 s.

The length, breadth and thickness of a rectangular block are 137.2 cm, 7.1 cm and 0.43 cm respectively. Which of these measurements is the most accurate?